SERVICE Vista Blending and Non-blending Suction Pumps and … · 2015. 7. 28. · APPENDIX D...

SERVICE

Vista Blendingand Non-blendingSuction Pumps andRemote Dispensers

Part No. 917543 Rev. A November 1992

WARNINGBEFORE YOU BEGIN

Dispensers have both electricity and a hazardous, flammable and potentially explosiveliquid. BE CAREFUL!

WARNING

More than one disconnect switch may be required to de-energize the dispenser for mainte-nance and servicing. Do not take chances—use a voltmeter to make sure ALL circuits inthe dispenser are de-energized.

CAUTION

To prevent damage to moving parts located in the hydraulic cabinet, dispenser doorsshould be in place during rainy and/or icy weather conditions. If ice has formed on compo-nents such as the nozzle boot tilt-switch shaft and flipper assembly, the flipper may bind inthe OFF position. If this occurs the flipper should be gently actuated by hand until fullmovement is achieved. Check all other moving parts e.g., totalizer/flex drive cable andmeter gear train for freedom of movement.

November 1992 Part No. 917543 Rev. A

Vista Blending Dispensersand Non-blending

Suction Pumps andRemote Dispensers

Service Manual

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TABLE OF CONTENTS

Title Page

1. INTRODUCTION .................................................................................................................... 11.1. The Blending Process Proportional Blenders ............................................................ 31.2. The Blending Process Fixed Ratio Blenders ............................................................. 3

2. GENERAL OPERATION ........................................................................................................ 52.1. Sequence of the Dispensing Cycle ............................................................................ 52.2. Unit Prices/Authorization .......................................................................................... 5

2.2.1. Manually Setting Unit Prices...................................................................... 72.2.2. Authorize Switch ........................................................................................ 72.2.3. Setting A Fueling Point............................................................................. 10

3. ELECTRONIC PARTS .......................................................................................................... 113.1. Display Boards ........................................................................................................ 113.2. Lighted Cash/Credit Interface Board....................................................................... 113.3. Solenoid Drive Board .............................................................................................. 123.4. Computer Assembly ................................................................................................ 12

3.4.1. Fault Codes ............................................................................................... 143.5. Intrinsic Safe Barrier Printed Circuit Board ............................................................ 153.6. Pulser Assembly ...................................................................................................... 15

3.6.1. Photocoupler ............................................................................................. 153.6.2. Pulser Disc ................................................................................................ 18

3.7. Suction Pump Motor ................................................................................................ 183.8. Blend Motor ............................................................................................................. 18

4. MECHANICAL PARTS ........................................................................................................ 214.1. Nozzle Boot (with Micro Switch) .......................................................................... 214.2. Nozzle Boot (with Tilt Switch) ............................................................................... 21

5. HYDRAULIC PARTS ........................................................................................................... 255.1. Strainer and Filter .................................................................................................... 25

5.1.1. Strainer...................................................................................................... 255.1.2. Filter.......................................................................................................... 25

5.2. Flow Control Valve .................................................................................................. 265.2.1. Flow Control Valve “Off” No Flow.......................................................... 305.2.2. Flow Control Valve “On” Slow Flow ....................................................... 305.2.3. Flow Control Valve “On” Full Flow......................................................... 335.2.4. Flow Control Valve Holding Back Pressure ............................................. 335.2.5. Flow Control Valve Relieving Back Pressure .......................................... 38

5.3. Meter ........................................................................................................................ 385.3.1 Meter Adjustment ..................................................................................... 38

5.4. Blend Valve.............................................................................................................. 435.5. Compact Pumping Unit ........................................................................................... 43

5.5.1. Priming the Compact Pumping Unit ........................................................ 435.6. Wayne Sump Assembly ........................................................................................... 45

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TABLE OF CONTENTS, continued

Title Page

6. TROUBLESHOOTING GUIDE ............................................................................................. 47Sale display and unit price displays are blank ........................................................................ 48Sale display on. Unit will not respond to individual function switch..................................... 48Sale display on. Unit will not respond to any function switches............................................ 48Unit price displaying 0.000 .................................................................................................... 49Computer will not reset .......................................................................................................... 49One or more digits or segments fail to operate....................................................................... 49Unit price not correctly displayed .......................................................................................... 50Computer resets but valves do not open ................................................................................. 50Computer resets but submersible pump does not come on .................................................... 50Fault Code 01.......................................................................................................................... 51Fault Code 02.......................................................................................................................... 51Fault Code 03.......................................................................................................................... 51Fault Code 04.......................................................................................................................... 52Fault Code 05.......................................................................................................................... 52Fault Code 06.......................................................................................................................... 52Fault Code 08.......................................................................................................................... 53Fault Code 10.......................................................................................................................... 53Fault Code 11.......................................................................................................................... 53Fault Code 12.......................................................................................................................... 53Fault Code 13.......................................................................................................................... 53Fault Code 14, 15, 16.............................................................................................................. 53Fault Code 20.......................................................................................................................... 52Fault Code 21.......................................................................................................................... 53Fault Code 51.......................................................................................................................... 54

7. COMPONENT REPLACEMENT .......................................................................................... 557.1. Electronic Component Replacement ....................................................................... 55

7.1.1. Removing the Bezel From Vista Dispensers ............................................ 557.1.2. Computer Assembly Replacement............................................................ 567.1.3. Intrinsic Safe Barrier PCB Replacement .................................................. 587.1.4. Display Board Replacement ..................................................................... 587.1.5. Cash/Credit Interface Board Replacement ............................................... 617.1.6. Solenoid Drive Board Replacement ......................................................... 617.1.7. Photocoupler/Pulser Disc Replacement.................................................... 647.1.8. Nozzle Boot Switch Replacement ............................................................ 647.1.9. Actuator Module Replacement (Modules with Incandesent Lamps) ....... 657.1.10. Actuator Module Replacement (Modules with High Intensity LEDs) ..... 667.1.11. Lighted Button Lamp Replacement .......................................................... 667.1.12. Back Lit Display Lamp Replacement ....................................................... 66

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Title Page

7. COMPONENT REPLACEMENT, continued7.2. Hydraulic Component Replacement ........................................................................ 67

7.2.1. Installation of Diaphragm ......................................................................... 677.2.2. Diaphragm Valve ...................................................................................... 687.2.3. Actuator .................................................................................................... 687.2.4. Meter ......................................................................................................... 697.2.5. Blend Valve............................................................................................... 69

APPENDIX A TROUBLESHOOTING FLOWCHARTS ........................................................ 71

APPENDIX B ELECTRONIC/ELECTRICAL COMPONENT TROUBLESHOOTING ....... 93

APPENDIX C DISPENSER INTERNAL WIRING DIAGRAMS......................................... 133

APPENDIX D GILBARCO PULSER INTERFACE PCB TROUBLESHOOTING .............. 147

USER’S RESPONSE SHEET .................................................................................................... 151

WARRANTY AND LIMITATION OF REMEDY AND LIABILITY .............. Inside Back Cover

FCC WARNING ............................................................................................................ Back Cover

LIST OF FIGURES

Figure 1-1. Proportional Blending Block Diagram ................................................................... 2Figure 1-2. Fixed Ratio Blending Block Diagram .................................................................... 4Figure 2-1. Bezel and Function Switch Location ...................................................................... 6Figure 2-2. Unit Price Display .................................................................................................. 9Figure 3-1. Duplex II Computer Connector Locations ........................................................... 13Figure 3-2A Duplex II Fault Code Displey Format and Definitions ........................................ 16Figure 3-2B. Duplex II Fault Code Displey Example ............................................................... 16Figure 3-3. Non-blending Photocoupler Internal Wiring ........................................................ 19Figure 3-4. Blending Photocoupler Internal Wiring................................................................ 20Figure 4-1. Nozzle Boot Assembly with Mirco Switch .......................................................... 22Figure 4-2. Nozzle Boot Assembly with Tilt Switch............................................................... 23Figure 5-1A. Blending Flow Control Valve “Off” No Flow ...................................................... 27Figure 5-1B. Non-blending Flow Control Valve “Off” No Flow .............................................. 28Figure 5-2. Flow Control Valve With Cover and Center Chamber Removed ......................... 29

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Title Page

LIST OF FIGURES, continued

Figure 5-3A. Blending Flow Control Valve “On” Slow Flow ................................................... 31Figure 5-3B. Non-blending Flow Control Valve “On” Slow Flow............................................ 32Figure 5-4A. Blending Flow Control Valve “On” Full Flow ..................................................... 34Figure 5-4B. Non-blending Flow Control Valve “On” Full Flow ............................................. 35Figure 5-5A. Blending Flow Control Valve Holding Back Pressure ......................................... 36Figure 5-5B. Non-blending Flow Control Valve Holding Back Pressure.................................. 37Figure 5-6A. Blending Flow Control Valve Relieving Back Pressure ....................................... 39Figure 5-6B. Non-blending Flow Control Valve Relieving Back Pressure ............................... 40Figure 5-7. Meter Cutaway ..................................................................................................... 41Figure 5-8. Meter Adjustment ................................................................................................. 42Figure 5-9. Blend Valve........................................................................................................... 44Figure 7-1. Replacing the Duplex II Computer ....................................................................... 57Figure 7-2. Replacing the Intrinsic Safe Barrier Board........................................................... 59Figure 7-3. Replacing the Integrated Display Board............................................................... 60Figure 7-4. Replacing the Lighted Cash Credit Interface Board............................................. 62Figure 7-5. Replacing the Solenoid Drive Board .................................................................... 63

LIST OF TABLES

Table 2-1. Unit Price Switch Closure Definitions Proportional Blenders .................................. 8Table 2-2. Unit Price Switch Closure Definitions Fixed Ratio Blenders ................................... 8Table 2-3. Unit Price Switch Closure Definitions Non-blenders................................................ 9Table 3-1. Definition of Duplex II Computer Fault Codes ....................................................... 17

APPENDICES

APPENDIX A TROUBLESHOOTING FLOWCHARTS .......................................................... 71Flowchart A-1. 01 Fault Code ....................................................................................... 73Flowchart A-2. 02 Fault Code ....................................................................................... 74Flowchart A-3. 03 Fault Code ....................................................................................... 75Flowchart A-4. 04 Fault code ........................................................................................ 76Flowchart A-5. 05 or 20 Fault Code.............................................................................. 77Flowchart A-6. 06 Fault Code ....................................................................................... 78Flowchart A-7. 08 Fault Code ....................................................................................... 79Flowchart A-8. 10 or 21 Fault Code.............................................................................. 80Flowchart A-9. 11 Fault Code ....................................................................................... 81

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Title Page

APPENDICES

APPENDIX A TROUBLESHOOTING FLOWCHARTS, continuedFlowchart A-10. 12 Fault Code ....................................................................................... 82Flowchart A-11. 13 Fault Code ....................................................................................... 83Flowchart A-12. 14, 15 or 16 Fault Code ........................................................................ 84Flowchart A-13. 51 Fault Code ....................................................................................... 85Flowchart A-14. Displays Are Blank .............................................................................. 86Flowchart A-15. Displays Scrambled.............................................................................. 87Flowchart A-16. Unit Will Not Respond To Individual Function Switch ....................... 88Flowchart A-17. Unit Will Not Respond To Any Function Switches ............................. 89Flowchart A-18. Unit Will Not Reset .............................................................................. 90Flowchart A-19. Unit Resets But Will Not Dispense ...................................................... 91Flowchart A-20. Unit Prices Show 0.000 ........................................................................ 92

APPENDIX B ELECTRONIC/ELECTRICAL COMPONENT TROUBLESHOOTING.......... 93B.1. Introduction ............................................................................................................. 95B.2. Removing the Bezel from the Dispenser ................................................................. 95B.3. The Dispenser Electronic Module (DEM)............................................................... 97B.4. Testing the Duplex II Computer .............................................................................. 99

B.4.1. The AC Input to the Solenoid Drive Board ............................................ 105B.4.2. Output to the Pulsers and Handle Switches ............................................ 106B.4.3. Power Output to the Displays ................................................................. 107B.4.4. Testing the Output to the Annunciators .................................................. 108B.4.5. Testing the Power Output to the Preset Control Board .......................... 109B.4.6. Testing the Input Power to the Computer ............................................... 110B.4.7. Testing the Fuses on the Duplex II Computer ........................................ 111

B.5. Testing the Solenoid Drive Board ......................................................................... 112B.5.1. Testing the AC Output from the Solenoid Drive Board ......................... 118B.5.2. Testing the Pulser Select Circuits ........................................................... 119

B.6. Testing the Output from the Photocoupler ............................................................ 120B.7. Intrinsic Safe Barrier Board................................................................................... 122

B.7.1. Testing the Intrinsic Safe Barrier ............................................................ 125B.8. Lighted Cash Credit Interface Board ..................................................................... 126B.9. Testing the Blend Motor ........................................................................................ 131Figure B-1. Typical Vista Dispenser ............................................................................ 95Figure B-2. Removing the Bezel from Vista Dispensers ............................................. 96Figure B-3. DEM Removal .......................................................................................... 97Figure B-4. The DEM in the Service Position ............................................................. 98

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Title Page

APPENDICES, continued

APPENDIX B, continuedFigure B-5. Duplex II Computer .................................................................................. 99Figure B-6. Duplex II Computers J3 Connector Pinout............................................. 100Figure B-7. Duplex II Computers J9 and J10 Connector Pinout ............................... 101Figure B-8. Duplex II Computers J11 Connector Pinout ........................................... 102Figure B-9. Duplex II Computers J6 Connector Pinout............................................. 103Figure B-10. Duplex II Comuters J1 Connector Pinout............................................... 104Figure B-11. Testing the AC Output to the Solenoid Drive Board .............................. 105Figure B-12. Testing the Output to the Pulsers and Handle Switches ......................... 106Figure B-13. Testing the Output to the Displays ......................................................... 107Figure B-14. Testing the Output to the Annunciator .................................................... 108Figure B-15. Testing the Power Output to the Preset Control Board .......................... 109Figure B-16. Testing the AC Input to the Computer .................................................... 110Figure B-17. Testing the Pico Fuses on the Duplex II Computer ................................ 111Figure B-18A. 3 Product Solenoid Drive Board............................................................. 112Figure B-18B. 4 Product Solenoid Drive Board............................................................. 113Figure B-18C.Blender Solenoid Drive Board ............................................................... 114Figure B-19. Solenoid Drive Board Connector J1 and J2 Pin Definitions .................. 115Figure B-20A. 4 product Solenoid Drive Board J3 and J4 Connector Pin Definitions .. 116Figure B-20B.Blender Solenoid Drive Board J7 and J8 Connector Pin Definitions..... 117Figure B-21. Testing the AC Output From the Solenoid Drive Board ........................ 118Figure B-22. Testing the Pulser Select Circuit ............................................................. 119Figure B-23. Testing the Output from the Photocoupler ............................................. 120Figure B-24. Manually Turning the Photocoupler ....................................................... 121Figure B-25. Intrinsic Safe Barrier J1 and J4 Connector Pinout ................................. 122Figure B-26. Intrinsic Safe Barrier J2 and J5 Connector Pinouts ................................ 123Figure B-27. Intrinsic Safe Barrier J3 and J6 Connector Pinout ................................. 124Figure B-28. Testing the Intrinsic Safe Barrier Board ................................................. 125Figure B-29. Lighted Cash Credit Interface Board ...................................................... 127Figure B-30. Lighted Cash Credit Interface Board J3 Connector................................ 128Figure B-31. Lighted Cash Credit Interface Board J4 Connector................................ 129Figure B-32. Lighted Cash Credit Interface Board J6 Connector................................ 130Figure B-33. Testing the Blend Motor ......................................................................... 131

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Title Page

APPENDICES, continued

APPENDIX C DISPENSER INTERNAL WIRING DIAGRAMS ........................................... 133Figure C-1. Duplex II Connector Pinouts for Non-Blenders ..................................... 135Figure C-2. Duplex II Connector Pinouts for Fixed Ratio Blenders ......................... 136Figure C-3. Duplex II Connector Pinouts for Proportional Blenders ........................ 1371-6560-D Internal Wiring Diagram - /V390D ........................................................ 1383-6560-D Internal Wiring Diagram - /V399D ........................................................ 1395-6560-D Internal Wiring Diagram - /V490D ........................................................ 1407-6560-D Internal Wiring Diagram - /V590D ........................................................ 1419-6560-D Internal Wiring Diagram - /V387D ........................................................ 14211-6560-D Internal Wiring Diagram - /V390P ......................................................... 14312-6560-D Internal Wiring Diagram - /V585D ........................................................ 14413-6560-D Internal Wiring Diagram - /V395D ........................................................ 14519-6560-D Internal Wiring Diagram - /V390D/U Single Hose MGD...................... 146

APPENDIX D GILBARCO PULSER INTERFACE PCB TROUBLESHOOTING ............... 147PCB, Pulser and I.S. Barrier Troubleshooting ................................................................ 149Figure D-1. Pulser Interface PCB Wiring Diagram ................................................ 149Flowchart D-1. Pulser Failure: Error Code XX-05.2 .................................................... 150

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1. INTRODUCTION

This manual describes the service of Wayne Vista series blending dispensers and non-blendingsuction pumps and dispensers. These dispensers can be identified by their model which beginswith “V”. The basic troubleshooting methods and service theory will remain the same for allmodels of dispensers which satisfy the above definition. Any information which is specific to aparticular model of dispenser will be shown as specific in the text.

Any service problems which cannot be solved should be referred to Wayne Technical Services orto the appropriate regional service manager.

Wayne Technical Services 1-800-926-3737Austin, TX 24 hours/7 days

Eastern Regional 410-546-6750Service Office 8:30AM-5:00 PM E.S.T.Salisbury, MD

Southeastern Regional 404-955-7982Service Office 8:30AM-5:00PM E.S.T.Atlanta, GA

Central Regional 312-693-7400Service Office 8:30AM-5:00PM C.S.T.Chicago, IL

Southcentral Regional 713-270-9996Service Office 8:30AM-5:00PM C.S.T.Houston, TX

Western Regional 714-952-1137Service Office 8:30AM-5:00PM P.S.T.Cypress, CA

INTERNATIONAL OFFICES

Carribean and Latin-America (Voice) 410-546-6757Service Office (FAX) 410-546-6882Salisbury, MD (TELEX) 684-9127

Mid-East and Europe (Voice) 734-866676Service Office (FAX) 734-312492United Kingdom

Far-East Service Office (Voice) 734-4431Singapore (FAX) 737-0219

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FIGURE 1-1. PROPORTIONAL BLENDING BLOCK DIAGRAM

Computer andSolenoid Drive

Board

Blend Valve andBlend Motor

PulsersHI Product Meter Lo Product Meter

LO Product InletHI Product Inlet

Electrical Connections

Mechanical Drive

Hydraulic Tubing

LINE STYLE DEFINITIONS

Blend Product Nozzle

JDB

-FH

-188

-A

Hose OutletWhere Mixing Actually

Takes Place

Lo Product FlowControl Valves

Hi Product FlowControl Valves

3


1.1. THE BLENDING PROCESS PROPORTIONAL BLENDERS (see Figure 1-1)

Proportional blenders have two grades of fuel input to the dispenser. The dispenser canthen use these grades to “produce” as many as five different grades output to the nozzle.Two of these are the input grades, the other three are a mix of the two input grades.These intermediate grades are produced by mixing the two input grades at some propor-tion. The proportion which is used will determine the octane rating of the intermediategrade.

There are two separate sets of hydraulics inside the proportional blender. One of thesesets is used to control flow of the low octane input (also called the LO feedstock), and theother is used to control the high octane input (also called the HI feedstock). The heart ofthe hydraulics in proportional blending dispensers is the blend valve. The HI and LOfeedstocks are each input to separate chambers in the blend valve; the blend valve isdesigned in such a way that the outputs from these chambers can be controlled. Bymanipulating the valve the flow from one chamber can be restricted while the flow fromthe other is increased, changing the ratio of one product to the other. The hydraulicscontinue to be separate until the two products are mixed at the hose outlet.

The computer continually senses the flow rate of each end grade and adjusts the blendvalve in order to maintain the correct blend ratio. If for some reason the correct blendratio cannot be obtained the computer will shut the sale down and generate an fault code.

1.2. THE BLENDING PROCESS FIXED RATIO BLENDERS

Fixed ratio blenders differ from proportional blenders in that only one blended product isavailable. This blended product is dispensed from the blended product hose (see Figure1-2). The feedstocks are dispensed from separate hoses.

Because the blend ratio output from the blend hose cannot be changed from one sale tothe next, the mixing of the end grades can take place immediately after the blend valve.

4


FIGURE 1-2. FIXED RATIO BLENDING BLOCK DIAGRAM

Computer

Blend Valve

Pulsers

HI Product Meter Lo Product Meter

HI ProductDiaphragm Valves

LO ProductDiaphragm Valves

LO Product InletHI Product Inlet

Electrical Connections

Mechanical Drive

Hydraulic Tubing

LINE STYLE DEFINITIONS

HI Product Outlet Blend Product Outlet LO Product Outlet

JDB

-FH

-114

-A

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2. GENERAL OPERATION

The general operation is very similar for all dispensers with model numbers beginning with V.

2.1. SEQUENCE OF THE DISPENSING CYCLE

• When the nozzle is removed from the nozzle boot, the constant +5 VDC which thecomputer sends to the handle switch goes to ground. At this point one of the lightedbuttons (grade select, cash/credit, or push-to-start depending on the model) will flashindicating that one of the buttons must be pressed.

• When one of the lighted buttons is pressed the constant +5 VDC which is supplied tothe switch goes to ground; signalling the computer to begin its reset cycle.

• If the dispenser has received an Authorization signal either from a control system orfrom the Authorize switch in the dispenser, the correct submersible pump relay willbe energized at this time.

• The computer performs a self test and flashes eights, blanks, then resets to zeros, onthe main sale display.

• The slow valve coil is energized two to six seconds, depending on option program-ming settings, after the submersible pump relay is energized.

• After a small amount of fuel has been dispensed, the fast valve coil is switched on.Both coils are now energized together.

• In preset sales the fast coil is de-energized just prior to the final shut-off amount. Theslow valve coil is then de-energized when the final amount is reached.

• When the nozzle is replaced in the nozzle boot the handle switch signal goes back to+5 VDC, and the sale is complete.

2.2. UNIT PRICES/AUTHORIZATION

Before any Wayne dispenser will reset two things must happen. First, the dispenser musthave unit prices set in it. Second, an authorization must be received from some source.Both the unit prices and the authorization can be manually set at the dispenser, or setfrom a control system. The function switches must be accessed in order to manually setunit prices, set the authorize switch, or set the fueling point (see Figure 2-1). In order toaccess the function switches complete the following steps:

• Lower the ad panel holder frame by pulling the holder frame out and down from thetop.

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FIGURE 2-1. BEZEL AND FUNCTION SWITCH LOCATION

WAYNE PUSH TO START

REGULAR UNLEADED

Display

Typical Vista Bezel With Ad-Panel In Place

WAYNE PUSH TO START

Function SwitchAccess Door

(Closed)Lock

Display

Wing HeadThumbscrewor Bezel Lock

AuthorizeSwitch

TotalsPushbutton

Position SelectPushbutton

Price JogPushbutton

DCPT Power(Optional)

Attend

Self-Serve

ON

OFF

Typical Vista Bezel With Ad-Panel Hinged Down

Function Switches, With Access Door Open

STOP

AuthorizeKeyswitch(Optional)

Stop Switch(Optional)

STOP

JDB

-FH

-209

SM

1

Fastener Clip

Fastener Clip

To lowerAd-Panelpull downfrom top

Wing HeadThumbscrewor Bezel Lock

SUPER

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2.2. UNIT PRICES/AUTHORIZATION, continued

• This exposes the function switch access door; unlock this door and slide it to the left.

• The function switches which are located behind the door opened in the previous stepare: the Authorize (Self-Serve/Attend) switch, the Totals pushbutton, the PositionSelect pushbutton, and the DCPT power switch (if the dispenser is equipped withDCPT’s).

2.2.1. Manually Setting Unit Prices

The following procedures need not be used if the dispenser is connected to acontrol system. Refer to the operating procedures provided with the controlsystem for a complete description of unit price setting.

The operating levers must be OFF to set unit prices.

The Position Select pushbutton selects the position for which the unit price is to bechanged. The Price Jog pushbutton changes the price of the position selected.

See also, Tables 2-1, 2-2 and 2-3 for blenders and non-blenders.

The first closure of the Position Select pushbutton selects position “X” unitprice (credit price of Cash/Credit type dispenser) and will blank the Unit Pricedisplays for the position “Y”, “Z”, and “AA”. The unit price for position “X”is set as follows:

The first closure of the Price Jog pushbutton causes the least significant digit ortenths of cents position of the unit price to cycle (see Figure 2-2). The digit willcycle 0 through 9 until the switch is released. Each successive closure of the PriceJog pushbutton will select and increment the next most significant digit.

Subsequent Position Select switch closures are defined in Table 2-1, 2-2 and2-3. The unit price for each position may then be set as described above.

2.2.2. Authorize Switch

The Authorize switch permits dispenser operation with or without consolecontrol. In the self service position (toggle the switch down), the dispensermust be authorized by the control system before each use. In the full serviceposition (toggle the switch up as shown in Figure 2-1), the dispenser may beoperated repeatedly without authorization from a control system.

• There is an Authorize switch for each fueling point.

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TABLE 2-1. UNIT PRICE SWITCH CLOSURE DEFINITIONS PROPORTIONAL BLENDERS

POSITION SELECT POSITION SELECTED SINGLE POSITION SELECTED CASH/CREDITSWITCH CLOSURE PRICE POSTING DISPENSERS TYPE DISPENSERS

FirstClosure Unit price LO feedstock or Credit unit price LO feedstock orlowest ratio blend lowest ratio blend.

Second Closure Unit price LO-MID blend Cash unit price LO feedstock orposition. lowest ratio blend.

ThirdClosure Unit price MID blend position. Credit unit price LO-MIDblend position.

Fourth Closure Unit price HI-MID blend Cash unit price LO-MIDposition. blend position.

FifthClosure Unit price HI feedstock or highest Credit unit price MID blendratio blend or single product. position.

SixthClosure Original sale display returns. Cash unit price MID blendposition.

Seventh Closure Credit unit price HI-MIDblend position.

Eighth Closure Cash unit price HI-MIDblend position.

NinthClosure Credit unit price HI feedstock orhighest ratio blend orsingle product.

TenthClosure Cash unit price HI feedstock orhighest ratio blend orsingle product.

Eleventh Closure Original sale display returns.

TABLE 2-2. UNIT PRICE SWITCH CLOSURE DEFINITIONS FIXED RATIO BLENDERS


First Closure Unit price LO feedstock. Credit unit price LO feedstock.Second Closure Unit price blend position. Cash unit price LO feedstock.Third Closure Unit price high feedstock. Credit unit price blend position.Fourth Closure Original sale display returns. Cash unit price blend position.Fifth Closure Credit unit price HI feedstock.Sixth Closure Cash unit price HI feedstock.Seventh Closure Original sale display returns.

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FIGURE 2-2. UNIT PRICE DISPLAY

TABLE 2-3. UNIT PRICE SWITCH CLOSURE DEFINITIONS NON-BLENDERS


First Closure Unit price position “X” Credit unit price position “X”Second Closure Unit price position “Y” Cash unit price position “X”Third Closure Unit price position “Z” Credit unit price position “Y”Fourth Closure Unit price position “AA” Cash unit price position “Y”

(490 Series dispensers only)Fifth Closure Original sale display returns. Credit unit price position “Z”Sixth Closure Cash unit price position “Z”Seventh Closure Credit unit price position “AA”

(490 Series dispensers only)Eighth Closure Cash unit price position “AA”

(490 Series dispensers only)Ninth Closure Original sale display returns.

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2.2.2. Authorize Switch, continued

• An optional Local Authorize keyswitch may be installed on the outside ofthe dispenser; this switch may be used as a one time authorize by movingit to the full service position and back to the self service position (operat-ing levers must be OFF; turn the keyswitch clockwise then back counter-clockwise). The dispenser will operate one time following this sequence.

• Programming in the control system will determine the use of the Authorizeswitch when the dispenser is under console control.

2.2.3. Setting A Fueling Point (Pump Number)

In order to set unit prices, or to authorize a dispenser, from a control systemeach fueling point must be assigned an individual I.D. number. A fuelingpoint is defined as any location at which a customer can stop and dispensefuel. In general, each Duplex II Computer in a dispenser represents twofueling points.

The fueling point number is set as follows:

• The Position Select pushbutton is used to enter the fueling point settingmode. The Totals pushbutton sets the fueling point number; see Figure 2-1 for switch location.

• Press the Position Select pushbutton.

• To read the fueling point number, press and release the Totals switch.

• To set the fueling point number, press and hold the Totals pushbutton. Theleast significant digit of the unit price display will cycle 0 through 9.Release the Totals pushbutton when the correct number is displayed.Press and hold the Totals pushbutton again and the next significant digitwill cycle 0 through 9. Release the Totals pushbutton when the correctnumber is reached. Currently only the numbers 01 through 24 are validfueling points. If any other number is entered the control system will notcommunicate with the dispenser computer.

• Press the Position Select pushbutton until the original sale display returns.

Note: In order for the dispenser to operate each fueling point must be set to a uniquenumber other than zero.

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3. ELECTRONIC PARTS

There are five types of electronic components which may be in the head of a Wayne dispenser.

• Display Board• Lighted Cash/Credit Interface Board• Solenoid Drive Board• Computer Assembly• Intrinsic Safe Barrier

The hydraulics cabinet contains one or more of the following electronic or electrical components.

• Pulser assembly• Suction Pump Motor (in suction pumps only)• Blend Motor (Blenders only)

3.1. DISPLAY BOARDS

The display boards are self-contained units which provide a visual display of sales infor-mation (i.e., dollar amount, volume amount, unit prices). The actual display elements areseven segment Liquid Crystal Displays (LCD’S). These elements are back lit with two7W, field replaceable, fluorescent lamps to improve their visibility in low lighting condi-tions. The LCD’s are soldered to their printed circuit boards; therefore, they are notreplaceable in the field.

The display board receives its data from the computer assembly. The decoding circuits,and the drivers for the LCD’s, are located on the display board.

3.2. LIGHTED CASH/CREDIT INTERFACE BOARD

The lighted cash/credit interface board performs two functions. First, is the switchinterface; that is all of the function and operational switch closures are sensed by thisboard and then transmitted to the computer. Second, it supplies power to the lightedbuttons on the dispenser (push to start, cash/credit select). The transformer on the boardconverts 110 VAC input to approximately 18 VRMS in order to power the switch lamps.

Located on this board is a fuse which fuses the AC input to the select board. If this fuseshould open, the push to start or cash/credit select switches will go blank; and the push tostart (or cash/credit select) and function switches will not work. Because the dispenserrequires that the push to start or a cash/credit select switch be pressed before it will reset,the dispenser will not reset.

Once the select switch has been pressed the push-to-start signal must be received at thepush-to-start input connector J5 At nozzle on, if Pin 1 and Pin 2 are both open eithermust be grounded and opened again for the dispenser to operate.

12


3.2. LIGHTED CASH/CREDIT INTERFACE BOARD (LIGHTED SELECT BUTTONS), continued

This board contains a four position DIP switch which must be set correctly in order forthe display to operate; the settings are as follows:

Position 1 Open or offPosition 2 Closed or onPosition 3 Open or offPosition 4 Closed or off

3.3. SOLENOID DRIVE BOARD

The solenoid drive board primarily serves as an AC switching board. By utilizing solidstate relays it can control AC power to the pump motor relays and two stage actuatorvalves. Also, the solenoid drive board enables the correct pulser assembly by switchingthe pulser select (0 volt) lines. In addition, blender solenoid drive boards provide DCpower to side 1 and side 2 blend motors.

Located on the solenoid drive board is a fuse labeled F1; this fuse controls all AC voltagesupplied to the solenoid drive board. If the F1 fuse opens the dispenser will reset, but novalves or relays will be energized.

3.4. COMPUTER ASSEMBLY (see Figure 3-1)

The computer is a complete self-contained unit with a built in power supply and memoryretention device. It is responsible for performing the following functions:

• Provides 5 VDC to, and monitors the return from, the handle switches.

• Monitors the two output lines from each pulser.

• Converts the data received from the pulsers into a volume amount.

• Calculates the sale dollar amount based on the selected unit price.

• Controls the solenoid drive board to switch on the correct submersible pump relaysand solenoid valves. It also switches the pulser select lines to enable the correctpulser(s) by controlling the solenoid drive board.

• Maintains electronic hose totals.

• Sends sale and hose totals data to the control system via a two wire data loop.

• Monitors all dispenser functions and, when a problem is found, generates and storeserror codes.

13


FIGURE 3-1. DUPLEX II COMPUTER CONNECTOR LOCATIONS

CAP

J11 J1

J2

J10

J9

J7

J8

J1

J3

J4

J5

JP1

CONNECTOR DESCRIPTIONS SOLENOID DRIVE BOARD

J1 --Solenoid Drive Side-1 There is also a J1 Located on the computer; it is the data connector for both sides.J2 --Solenoid Drive Side-2J7 --Blend Motor Connection Side-1J8 --Blend Motor Connection Side-2

CONNECTOR DESCRIPTIONS COMPUTER

J1 -- Data Loop Both SidesJ3 -- AC InputJ4 -- Displays Side-1J5 -- Displays Side-2J6 -- Future Diagnostic UseJ9 -- Pulser Control Side-1J10--Pulser Control Side-2J11-- Nozzle Switches Both SidesJ13 -- Annunciator ConnectionJ14 -- Annunciator Connection

FUSES

F1--Fuses the input to the 5 VDC regulatorF2--Fuses the input to the 12 VDC regulatorF3--Fuses the AC input to the computer

COMPUTERSOLENOID DRIVE BOARD

JDB

-FH

-152

-B

J6

JP2andJP3

J13

J14

F1 F2 F3

14


3.4. COMPUTER ASSEMBLY, continued

The Duplex Computers are fused to protect them from overvoltages and shorts. There arethree fuses on the computer:

• F1 fuses the input to the 5 VDC regulator on the computer board. If this fuse opensthe dispenser will look like it has been powered down.

• F2 fuses the input to the +12 VDC regulator. This 12 VDC is used only in blendingdispensers to operate the blend motor.

• F3 fuses the main AC input to the computer; all power to the computer, solenoid driveboard, and the displays passes through the F3 fuse. If this fuse opens the dispenserwill look as if it has been powered down.

Note: These are all pico fuses. They physically look very similar to a resistor, aresocketed, and may be replaced in the field.

On the Duplex II Computer there are two option jumpers which must be configured forproper operation. These are labeled JP2 and JP3; they must be left in their factory in-stalled positions. (They should be jumpering the two pins which are closest to the edgeof the board for blending applications.) In addition to the jumper settings, there areprogramming options which must be set in order for the Duplex II Computer to operatecorrectly. (see Programming for the Duplex II Computer—Service, part number 917479,for specific information.)

3.4.1. Fault Codes

The fault codes generated by the Duplex II Computer are of four types: Errorcodes, Hydraulic codes, Service codes and Disable codes. The definitions ofeach of these types are as follows:

• Error codes shut down the entire side of the dispenser until the error isreset by cycling power to the computer or entering Option 99. (SeeProgramming for the Duplex II Computer—Service, part number 917479,for specific programming functions.)

• Hydraulic codes shut down the nozzle position which was affected by theerror until the error is reset by cycling power to the computer or enteringOption 99.

• Service codes are recorded and displayed in Option 01, but do not affectthe operation of the dispenser.

• Disable codes are similar to service codes in that they do not affect theoperation of the dispenser; however, they are not recorded or displayed inOption 01.

15


3.4.1. Fault Codes, continued

Note: All fault codes will continue to be displayed until the problem which causedthem is remedied.

Error and Hydraulic codes are displayed every time the affected portion of thedispenser is started by removing the nozzle from the nozzle boot and pressinga start switch.

The format of the displayed fault codes is shown in Figure 3-2 and the defini-tion of each code is shown in Table 3-1.

3.5. INTRINSIC SAFE BARRIER PRINTED CIRCUIT BOARD

The Intrinsic Safe Barrier is located in the electronic head of the dispenser. Its function isto ensure that the amount of electrical energy introduced into the hydraulics cabinet iswithin acceptable limits. This barrier uses resistors and zener diodes to limit energy outof the barrier. In the dispensing cycle, when the operating lever is lifted, the nozzleswitch moves to the closed position. This causes the nozzle signal on the computer baseto go from a +5 VDC potential to zero or ground potential, which cues the microproces-sor to begin a new sale if the dispenser has been authorized and the push-to-start or cash/credit select switch has been pressed.

The Intrinsic Safe Barrier Printed Circuit Board contains current limiting resistors andvoltage limiting redundant (2 in parallel) zener diodes which will limit voltage potentialto approximately 6.2 VDC. This energy limiting circuit eliminates the possibility of arcsin the hydraulic area of the dispenser.

3.6. PULSER ASSEMBLY (see Figures 3-3 and 3-4)

The pulser assembly consists of two parts:

• Photocoupler• Pulser Disc

3.6.1. Photocoupler

The photocoupler consists of two infrared LED’s and two phototransistors,one for each LED. These four parts work together to provide two separatepulse returns to the computer. These pulse return lines are labeled “Pulse A”and “Pulse B”. The computer must receive the pulses in an alternating se-quence (i.e., pulse A, pulse B, A, B, A, B...). In this way the computer candetermine correct operation. If the computer sees too many A or B pulses in arow it will assume that the photocoupler is defective, shut down the sale andgenerate a fault code (see Table 3-1). If the computer sees that the meter isturning in the wrong direction, it will shut down the sale and generate a faultcode (see Table 3-1).

16


FIGURE 3-2A. DUPLEX II FAULT CODE DISPLAY FORMAT AND DEFINITIONS

FIGURE 3-2B. DUPLEX II FAULT CODE DISPLAY EXAMPLE

NNN-SPF-CC.T

MAIN SALE DISPLAY

S = Side 1 or 2. This is the side on which the code was

detected.T = Fault Code Status: 1 = Error 3 = Service 2 = Hydraulic 4 = Disable

NNN = Sequence Number in the range of 000 - 999

CC = Fault Code number in the range of 00 - 99

F = Fault Source. This value identifies the fault source if the fault can belinked to a particular hydraulic condition. The range is 0 - 7, "H" or "L".The numeric values indicate positions (0 = none) while the lettersindicate blending feedstocks.

P = Product Source. This is the position that was selected at the time thefault occurred. The range is 0 - 7, with 0 = no position selected.

SG

M-F

H-1

01

MAIN SALE DISPLAY

SG

M-F

H-1

02

17


TABLE 3-1. DEFINITION OF DUPLEX II COMPUTER FAULT CODES

CODE STATUS DESCRIPTION

01 1 Push to start open, or cash or credit switch(es) shorted.02 1/3* Push button start; option disabled but switch detected.03 1/2* Unit has overrun prepay/preset amount.04 1 ROM error.05 1/2* Pulser error. (Set if jitter count exceeds limit)06 1/3* Illegal current sensed in valve or relay output circuit.08 1/2/3* Time out limit has been exceeded.10 1/2*/3 Reverse pulse limit has been exceeded.11 1 Corrupted option data. The pump will not restart until

Option 99 is set to 03. Cycling power will not reset this error.12 3 Corrupted totals data; the totals were reset to zero.13 3 Corrupted unit price data; the unit prices were reset to zero.14 1/2* Forward pulses from illegal pulser.**15 1/2* Jitter pulses from illegal pulser.**16 1/2* Reverse pulses from illegal pulser.**20 3/4* Jitter count exceeds limit (blenders only).*** †21 3/4* Reverse count exceeds limit (blenders only).*** ††51 1 Blend ratio has exceeded error limits in Option 52.***

Note: An asterisk (*) next to a number in the Status column indicates the defaultstatus for that Fault Code. More than one number in the status column indi-cates that the status of that Fault Code is alterable. The fault status of analterable code must be selected in accordance with the code allocation pro-gramming sequence in Option 98. See Programming for the Duplex II Com-puter—Service (part number 917479) for specific information.

** An illegal pulser is defined as follows:1) Blending dispensers - a pulser for a feedstock product not selected.2) Unihose MGDs - a pulser for a product not selected.

*** Because these are blend errors they should not appear on non-blending dispensers;however, if the computer is programmed incorrectly, for instance if it is set up as ablender, these errors could appear in a non-blending dispenser.

† Jitter pulse count exceeds logging limit fault is displayed in the following special format:Sale Amount: NNN-SSSale Volume: PF.20.BB

where, NNN = Sequence NumberS = Side 1 or Side 2P = Product Source (0-7)F = Fault Source (0-7) or (H or L)20 = Fault Code 20 (Jitter count exceeds limit)BB = Maximum jitter count allowed

†† Fault Code 21 is displayed in the same special format as Fault Code 20 except that21 appears in the Sale Volume. Example: PF.21.BB

18


3.6.1. Photocoupler, continued

In blending dispensers the LED’s in each photocoupler are wired in series, asshown in Figure 3-4. Because of this a problem in one of the photocouplerscan cause symptoms to be shown on the other end grade. For instance if oneof the LED’s in the Lo product photocoupler was to become an open circuitthe five volts would not be supplied to that LED in the Hi productphotocoupler. This would cause symptoms to appear on any Hi product sales.

3.6.2. Pulser Disc

The pulser disc is a plastic disc with square holes cut around its outer edge. Itis connected to a shaft which is turned by the meter. The holes in the edge ofthe disc pass between the LED’s and the phototransistors. This alternatelyblocks and reveals the infrared beam to the phototransistors creating thepulses.

3.7. SUCTION PUMP MOTOR

The pump motor used in Wayne suction pumps can be either a 1/3 or 3/4 horsepowermotor. Either of these two motors can be operated on either 110 VAC or 220 VAC,depending on a switch setting. The voltage selection switch is located on the side of themotor, and is secured by a sheet metal screw. To change the operation of the motor:

• Remove the sheet metal screw which holds the switch in position.

• Move the selector switch to the desired location.

• Replace the screw to lock the switch in its new setting.

The pump motors are switched on by a relay located in the dispenser junction box. Thisrelay is pre-wired to the relay select line from the solenoid drive board. The load side ofthe relay contacts are factory wired, therefore, the only on-site connections which need bemade are the two input wires to the relay contactors.

3.8. BLEND MOTOR

(Blenders only) The blend motor is an electrical stepper motor which is used to adjustthe blend valve as product is being dispensed. The stepper motor receives voltage pulsesfrom the solenoid drive board; each of these pulses causes the motor to move a knownamount. A linkage interconnects the motor and the blend valve; therefore as the motormoves the blend valve moves with it. The blend motor, one for each side of the dis-penser, is located in the dispenser junction box.

19


FIGURE 3-3. NON-BLENDING PHOTOCOUPLER INTERNAL WIRING

Photocoupler

Pulser Disc

PULSERSELECT0 VDC PUL A LED B LED APUL BJD

B-F

H-1

15-A

20


FIGURE 3-4. BLENDING PHOTOCOUPLER INTERNAL WIRING

Blend Pulser SelectV-BK

Pul B LOV-R

Pul B HIBU-BK

LED A5 VDC

OR

LED B5 VDCOR-BK

PUL A HIBU

PUL A LOY

WIRE COLORSV --VioletY --YellowBU--BlueBK--Black

OR--OrangeR --Red

JDB

-FH

-220

-A

LO ProductPhotocoupler

HI ProductPhotocoupler

21


4. MECHANICAL PARTS

4.1. NOZZLE BOOT (WITH MICRO SWITCH)

The nozzle boot contains a “flipper” which closes the handle switch when the nozzle isremoved from the boot. This flipper is spring actuated so that when the nozzle is re-moved it springs to the ON position. When the nozzle is replaced in the nozzle boot itpushes the flipper to the OFF position. As the flipper turns it rotates a shaft. This shafthas a flat spot on it which actually operates the nozzle switch. See Figure 4-1.

To adjust the switch in the nozzle boot perform the following steps:

• Remove the nozzle from the nozzle boot. Ensure that the flipper contacts the insidebottom wall of the nozzle boot.

• Loosen the two screws which secure the nozzle switch and bracket to the nozzle boot.Position the switch so that its contacts are closed and the lever on the switch does notcontact the body of the switch. Tighten the screws which were previously loosened. (Inorder to determine if the switch contacts are closed disconnect the handle switch wiringharness at the two wire connector and use a VOM; you should read continuity.)

• Slowly push the flipper toward the OFF position. The switch contacts should openwhen the flipper has traveled approximately 1/2 inch.

• Place the nozzle in the nozzle boot. The switch contacts should still be open. If theyare not loosen the screws which secure the switch and bracket and reposition theswitch slightly. If it is necessary to adjust the switch at this time make sure that theswitch still comes on when the nozzle is removed.

4.2. NOZZLE BOOT (WITH TILT SWITCH)

The nozzle boot switch assembly consists of a mercury tilt-switch permanantly attachedto a shaft and wire harness. The shaft is inserted into a spring-loaded flipper. When thenozzle is removed the flipper rotates the shaft and tilt-switch assembly turning the switchON. There is no adjustment for the tilt-switch.

Check the operation of the nozzle switch as follows:

• Authorize the dispenser; make sure the switch turns ON when the nozzle is removed(the dispenser will reset and be ready to dispense product).

• Insert the nozzle slowly into the nozzle boot, making sure that the tilt-switch turnsOFF before the point where it is possible for the nozzle handle to rest on the nozzlehook.

• Make sure that when the nozzle is replaced on the nozzle hook, the dispenser does notcome on again.

22


FIGURE 4-1. NOZZLE BOOT ASSEMBLY WITH MICRO SWITCH

23


FIGURE 4-2. NOZZLE BOOT ASSEMBLY WITH TILT SWITCH

24


25


5. HYDRAULIC PARTS

The following section describes the operation of those hydraulic parts in Wayne dispenserswhich perform some “act”. Simple flow tubes will not be discussed.

There are three basic hydraulic parts (four in blending dispensers) in Wayne dispensers as fol-lows:

• Strainer and Filter• Flow Control Valve• Meter• Blend Valve (Blenders only)

5.1. STRAINER AND FILTER

The strainer and filter are mentioned in this document only because they may cause thedispenser to deliver slowly. In some cases this may appear to be a service problem. Inreality the filter should be changed and the strainer cleaned on a regular basis.

Before removing the strainer or filter assembly, trip the impact valve and turn OFF thecircuit breaker for the associated submersible pump.

5.1.1. Strainer

If the underground installation is a new one, it may be necessary to clean thestrainer screen two or three times the first few days of operation to removedebris and pipe dope. After this, occasional cleaning of the strainer is all thatshould be required. The fuel filter should be changed whenever the strainer iscleaned.

The strainer is removed for cleaning by unfastening the cap. Place a containerunder the cap to catch the product and sediment. Wash the screen in gasolineand dislodge lint and other foreign particles with compressed air. Check forleakage after reinstalling.

5.1.2. Filter

Like the strainer in new installations it may be necessary to change the filterfrequently in the first few days of operation in order to ensure proper opera-tion.

The fuel filter is removed by unscrewing it (the same way an oil filter isremoved from a car engine). Place a container under the filter to catch thefuel. To install the new filter, first apply a film of oil to the gasket and handturn until gasket contacts base. Then tighten one half turn. Open the emer-gency shear valve, turn the submersible circuit breaker ON and check forleaks.

26


5.2. FLOW CONTROL VALVE

This section describes the operation of the Wayne 2-stage solenoid operated diaphragmvalve.

The 2-stage solenoid operated diaphragm valve has three basic functions. It controls allflow through the dispenser. It acts as a check valve to hold the dispenser full of productbetween sales. And it acts as a pressure relief valve to relieve built up pressure in thedispenser.

The valve itself consists of three main parts:

• The diaphragm valve• The actuator• The actuator coils

The diaphragm valve is the main flow valve. It controls the full flow through the dis-penser. In addition, it acts as a pressure relief valve in the event that pressure builds updownstream from the valve.

The actuator is an electrically operated solenoid valve. It controls the diaphragm valveby switching the diaphragm into and out of full flow.

The actuator coils control the actuator itself. When the coils are energized “poppets”inside the actuator are moved to expose flow paths through the actuator.

Together these three parts will be referred to as the “flow control valve” throughout thissection.

The flow control valve performs three separate functions. It provides for slow productflow, to be used in the slowdown at the end of preset sales. It allows for full productflow. It also acts as a check and pressure relief valve to hold the dispenser full of productat all times and to relieve any excess pressure built up in the dispenser.

In all Wayne dispensers using the 2-stage solenoid operated diaphragm valve the generalorder of operation is the same. At the outset of a sale the slow flow coil only is energizedcausing slow product flow to start. After a small amount of product is delivered bothcoils are energized. This initiates full flow. For preset sales the dispenser will switchback to slow flow at a pre-determined point.

27


FIGURE 5-1A. BLENDING FLOW CONTROL VALVE “OFF” NO FLOW

5

1

INLET

8

7

9

10

32

6

11

4

OUTLET

Indicates High Pressure

12 13

A C B

A

14

JDB

-FH

-191

-B

1. Actuator 2. Passageway from inlet chamber to outer chamber 3. Orifice through valve plate to center chamber 4. Passageway to the actuator inlet from the center chamber 5. Actuator outlet 6. Relief valve 7. Center section 8. Diaphragm material 9. Valve plate10. Cover11. Body12. Slow flow poppet13. Full flow poppet14. Diaphragm return spring15. Port from outlet chamber to center chamber

LEGEND

A. Inlet chamberB. Outer chamberC. Center chamber

15

28


FIGURE 5-1B. NON-BLENDING FLOW CONTROL VALVE “OFF” NO FLOW

5

1

INLET

8

7

9

10

32

6

11

4

OUTLET


12 13

A C B

A

14

JDB

-FH

-109

-B

1. Actuator 2. Passageway from inlet chamber to outer chamber 3. Orifice through valve plate to center chamber 4. Passageway to the actuator inlet from the center chamber 5. Actuator outlet 6. Relief valve 7. Center section 8. Diaphragm material 9. Valve plate10. Cover11. Body12. Slow flow poppet13. Full flow poppet14. Diaphragm return spring

LEGEND


29


FIGURE 5-2. FLOW CONTROL VALVE WITH COVER AND CENTER CHAMBER REMOVED

OUTLETPORT

A A

A

INLET

OUTLET

2

4

Indicates Part of Casting

JDB

-FH

-126

-B

2. Passageway from inlet chamber to outer chamber 4. Passageway to the actuator inlet from the center chamber A. Inlet chamberNote: Item numbers 2, 4 and letter A are discussed in the text.

LEGEND

30


5.2.1. Flow Control Valve “Off” No Flow (see Figures 5-1 and 5-2)

Flow control valve “off” or no flow occurs when the inlet to the valve ischarged, but there is no flow required from the particular valve, as in theinstance, where the submersible pump motor is running because anotherfueling point is being used. The inlet and the “inlet chamber” (A) are chargedwith the pump pressure. This pressure passes through a port (2) from the inletchamber to the “outer chamber” (B). From there the product passes throughthe orifice (3) into the “center chamber” (C), then through a passageway (4),and into the 2-stage actuator (1).

The pressure in the inlet chamber and the center chamber are equal at thispoint. Because the area of the diaphragm material (8) exposed to the inletchamber is approximately half that exposed to the center chamber, the forceholding the diaphragm closed is twice that which is trying to open it. There-fore, the diaphragm material (8) remains in the closed position covering theoutlet port.

5.2.2. Flow Control Valve “On” Slow Flow (see Figure 5-3)

Flow control valve “on” slow flow occurs at the beginning of all sales, andagain at the end of preset sales. The pressures remain the same as described inSection 5.2.1.1. The difference is that the slow flow actuator coil (omitted forclarity) has been energized. This causes the slow flow poppet (12) to bepulled off of its seat exposing a path (5) to the outlet. The flow through thispath is so slow that the pressure in the center chamber (C) is not reduced.Therefore, the diaphragm remains in the closed position.

31


FIGURE 5-3A. BLENDING FLOW CONTROL VALVE “ON” SLOW FLOW

8

7

9

10

2 3

6

11

45

1

INLET

OUTLET


12 13

A C B

A

14

JDB

-FH

-193

-B


LEGEND


15

32


FIGURE 5-3B. NON-BLENDING FLOW CONTROL VALVE “ON” SLOW FLOW

8

7

9

10

2 3

6

11

45

1

INLET

OUTLET


12 13

A C B

A

14

JDB

-FH

-111

-B


LEGEND


33


5.2.3. Flow Control Valve “On” Full Flow (see Figure 5-4)

Flow control valve “on” full flow occurs during the main portion of all sales.At this time, both the slow and fast actuator coils (omitted for clarity) areenergized. This pulls both the slow (12) and fast (13) poppets rearwardexposing a path to the outlet. This path is larger then the one described inSection 5.2.1.2. Pressure is relieved from the center chamber (C) faster than itcan be replenished. This creates a pressure imbalance between the inletchamber (A) and the center chamber (C); the pressure in the center chamberbeing lower. Because the pressure in the inlet chamber is higher than that inthe center chamber, the diaphragm material is pushed towards the centerchamber. This opens a path directly from the inlet to the outlet, initiating fullflow.

When the delivery is complete both actuator coils are de-energized, allowingthe poppets to return to their rest position. This closes both ports in theactuator and removes the pressure drain from the center chamber. The pres-sure now builds in the center chamber until it equals that of the inlet chamber,at which point the spring (14) pushes the diaphragm closed stopping flow.

5.2.4. Flow Control Valve Holding Back Pressure (see Figure 5-5)

Once a delivery is complete there is some amount of product which is trappedon the outlet side of the flow control valve. This is necessary in order to holdthe meter, hose, and nozzle full. This product is held at some pressure, gener-ally near the pressure of the last delivery. If the pressure should build up, forinstance a car running over the hose, the flow control valve would act as arelief valve.

34


FIGURE 5-4A. BLENDING FLOW CONTROL VALVE “ON” FULL FLOW

5

1

INLET

8

7

9

10

32

6

11

4

OUTLET


12 13

A C B

A

14JD

B-F

H-1

92-B


LEGEND


15

35


FIGURE 5-4B. NON-BLENDING FLOW CONTROL VALVE “ON” FULL FLOW

5

1

INLET

8

7

9

10

32

6

11

4

OUTLET


12 13

A C B

A

14

JDB

-FH

-110

-B


LEGEND


36


FIGURE 5-5A. BLENDING FLOW CONTROL VALVE HOLDING BACK PRESSURE

5

1

INLET

8

7

9

10

32

6

11

4

OUTLET


A

A C B

1312

14

JDB

-FH

-190

-B


LEGEND


15

37


FIGURE 5-5B. NON-BLENDING FLOW CONTROL VALVE HOLDING BACK PRESSURE

5

1

INLET

8

7

9

10

32

6

11

4

OUTLET


A

A C B

1312

14

JDB

-FH

-108

-B


LEGEND


38


5.2.5. Flow Control Valve Relieving Back Pressure (see Figure 5-6)

In this instance as the pressure builds, it lifts the slow flow poppet off of itsseat and passes through the port (4) into the center chamber. Once the pres-sure reached approximately 35 psi the relief valve (6) would open allowingproduct into the outer chamber, where it would flow through the port (2) intothe inlet chamber, and from there back into the underground tank.

5.3. METER (see Figure 5-7)

The meter is, in effect, a three-cylinder motor, using cylinders ‘B’ and ‘C’ and chamber‘D’ as the three cylinders. Because the filling and discharging ports in the valve arelocated 120° apart, and the port openings in the valve seat are at 120°, there is no dead-center position in the meter. The operation of filling is continuous, in that before onechamber is fully filled, the next one is in the process of starting to fill. The same proce-dure applies to the discharging operation. The filling and discharging operations eachoccupy 180° of rotation. Measurement of flow is determined by the fact that the dis-placement of each cylinder, together with the displacement from chamber ‘D’, representsa known quantity, and the flow has a direct and substantially constant relationship to therotation of the output shaft.

By connecting the output shaft to the pulser assembly, the rotary movement of the metercan be converted into pulses, which can in turn be counted by the computer. Calibrationis made possible by the incorporation of an adjusting knob on the top of the unit. Move-ment of this knob causes the throw of the crank arm on the output shaft to be varied, sothat the speed at which the shaft rotates can be accurately adjusted to the known output ofthe meter.

5.3.1. Meter Adjustment (see Figure 5-8)

While the dispensers leave the factory properly adjusted, rough handling intransit or special installation conditions can change this. Therefore, beforeplacing the dispenser in operation, these items must be checked and adjusted,if required.

If meter adjustment is required, the adjustment knob is located on the top ofthe meter; see Figure 5-8. If the test can reads low, break the seal, lift theadjustment knob and turn in a clockwise direction, viewing the knob from thetop of the meter. The lower portion of the knob is hexagonal and, in a normalposition, the portion of the knob is inserted in the output shaft assembly.There are 18 vertical notches within the shaft, therefore, as the adjustment ismade, the knob can be felt to click over the leading edge of the notches. Eachnotch is equivalent to a correction of approximately one cubic inch in fivegallons. After the meter has been adjusted and brought within tolerance,replace the seal wire and seal by pinching the lead lock on the wire.

39


5

1

INLET

8

7

9

10

32

6

11

4

OUTLET


A

A C B

1312

14

JDB

-FH

-205

-B


LEGEND


15

FIGURE 5-6A. BLENDING FLOW CONTROL VALVE RELIEVING BACK PRESSURE

40


FIGURE 5-6B. NON-BLENDING FLOW CONTROL VALVE RELIEVING BACK PRESSURE

8

7

9

10

2 3

6

11

45

1

INLET

OUTLET


12 13

A C B

A

14JD

B-F

H-1

12-B


LEGEND


41


FIGURE 5-7. METER CUTAWAY

42


FIGURE 5-8. METER ADJUSTMENT

43


5.4. BLEND VALVE

The blend valve is used in blending dispensers to mix two different grades of product inorder to produce intermediate grades which have an octane rating somewhere betweenthe first two. The blend valve is designed in such a way that as it restricts the flow of oneproduct it permits increased flow of the other.

In order to accomplish this the valve has two separate chambers. Each of these chambershas its own inlet and outlet. The outlets come together at some point after the blend valveand this point is where the mixing actually takes place. Each of the outlets is covered, insome part, by a “shoe”. These “shoes” are attached to a drive shaft in such a way that asone port is being uncovered the other is being covered, thus adjusting the flow of eachproduct. (see Figure 5-9.)

5.5. COMPACT PUMPING UNIT

The Wayne compact pumping unit is a rotary-type gear pump. These pumps are called“self-priming” because they will remove all air and vapor from the suction line withoutassistance from an outside source. Rotary pumps operate with extremely close clearancesbetween the rotating member and the pump casing. This feature enables them to be good“self-primers” and ideal pumps for gasoline dispensing systems.

The bypass valve in the compact pumping unit should be set at one of two pressures. Ifthe pumping unit is driven by a 1/3 horsepower motor the pressure should be 21-22 psi.If the motor is 3/4 horsepower the bypass pressure should be 28-30 psi. To adjust thebypass pressure remove the acorn nut on the bypass assembly, then loosen the locking nuton the adjusting screw. Tightening the adjusting screw will raise the pressure; looseningthe screw will lower the pressure.

Also part of the compact pumping unit is the air eliminator. This is a fairly large holdingchamber with an outlet at the top. This outlet is attached to the sump assembly. Asproduct is delivered to the air eliminator the vapor, in the form of foam, rises to the topand passes through the outlet to the sump assembly.

5.5.1. Priming the Compact Pumping Unit

It is not advisable to run any type of pumping unit dry during the primingprocess, therefore, it is recommended that a small quantity (1/2 pint or 1/4liter) of motor oil be inserted through the priming port of the pumping unitbefore commencing operation.

If difficulty is encountered using the priming port, the pumping unit should beprimed by removing the pressure relief valve seal cap complete with adjustingscrew, the valve spring and the valve poppet (for more detailed information onthe service and troubleshooting of the compact pumping unit see The WayneCompact Pumping Unit—Service; part number 917466)

44


FIGURE 5-9. BLEND VALVE

Low Product Chamber High Product Chamber

Adjusting Lever

High ProductOutlet

High ProductShoe

Low ProductOutlet

Low ProductShoe

High ProductInlet

LowProduct

Inlet

JDB

-FH

-134

-A

HILOOFFOFF

45


5.6. WAYNE SUMP ASSEMBLY

When air enters a suction type pump, it is eliminated by the air separator inside thecompact pumping unit and the sump assembly. In the pumping unit, gasoline vapors riseto the top and escape to the sump assembly. At the top of the sump assembly is an orificeconnected to the nozzle boot via a copper tube. This tube provides an outlet for thevapors. Along with this vapor is a small amount of product. This fluid remains in thebottom of the sump. A needle valve at the bottom of the sump provides for recirculationof the product. As the level of product rises in the sump, a float rises, opening the needlevalve and allowing the gasoline to pass through copper tubing back to the suction side ofpump.

46


47


6. TROUBLESHOOTING GUIDE

Many problems that appear to be the result of a defective computer are really caused by contami-nation of the computer memory. Prior to replacing the computer for a first occurrence of aparticular problem, a RAM clear should be initiated and the computer retested. If the computerfunctions, it should not be replaced unless a second occurrence of the same problem results.

To clear the RAM on the Duplex II computer use the following procedure:

• Record all totals and all option programming.

• Remove power from the computer by disconnecting the J3 connector.

• Short pins 3 and 5 on the J6 connector while replacing the J3 connector on the computer.(Pin 1, on the J6 connector, is closest to the center of the printed circuit board.)

• Remove the short from the J6 connector.

• Enter option 97, the money display will show XXXAB. (XXXAB represents a number up to5 digits.)

• Enter AB as BA. For instance, if 91 is shown in the two least significant digits of the moneydisplay enter 19. (AB represents the two least significant digits in the money display.)

• Press and hold the price jog switch until zeros appear in the money and unit price displays;this indicates that the RAM has been cleared.

• Reset the fueling point if applicable, all option programming, and unit prices. J6 pins 3 and 5must be jumpered and the power cycled before options 2, 4, or 97 may be changed.

• Record all totals a second time and give them to the dealer/manager for his/her records.

Warning: The above and following actions require that the electrical power to the equip-ment be on. Remember that electrical power is dangerous and proper precau-tions to protect oneself from contact with the electrical power are necessary.

48


Failure Indication Probable Cause Corrective Action

Sale display and unit 1. No power to Check control power circuitprice displays are blank. computer. breaker.

Check for AC between pins 1 and2 of J3 connector. If not presentcheck in J-box. If not present inJ-box problem is in site wiring;if 110 VAC is present in the J-boxthe problem is in the dispenserinternal wiring. Check F1 and F3on computer and replace asnecessary.

2. Defective display. Replace the display board.

3. Defective computer. Replace.

Sale Display ON. Unit 1. Defective Switch. Check for +5VDC off; zerowill not respond to volts on, replace switch if voltageindividual function switch is constant at either 5 or 0.(i.e. the totals switch orthe price jog switch). 2. Defective wiring Check all wiring to defective

to switch. function switch.

Sale display ON. Unit 1. Defective switches. Check for +5VDC off; zero voltswill not respond to any on. Replace switch if voltagefunction switches. is constant at either 5 or 0.

2. Blown fuse on the Check F1 on the interface boardlighted Cash/Credit replace the board if the fuse isInterface board. blown.

3. Defective wiring to Check all wiring to the functionswitches. switches.

4. Defective switch Replace the Cash/Credit Interfaceinterface circuitry on board.Cash/Credit interfaceboard.

5. Defective computer Replace.assembly.

49



Unit price displaying . 1. Control system unit Set correct unit price. Refer to the0.000 price set at 0.000. control system operation manual.

2. Unit price not set at Set correct price using price jogdispenser. If a control switch.system is connectedskip to step 4.

3. Data was corrupted Reset prices and or optionthen cleared by the programming; if problemcomputer. Check reoccurs replace computer.option 01 to verify.(see Programmingfor the Duplex IIComputer—Servicepart number 917479for details)

4. Fueling point not set. Set fueling point.If a control system isnot connected skip tostep 5.


Computer will not reset. 1. Unit prices 0.00. See above.

2. No authorize to Refer to control system operationdispenser computer. manual if one is installed.Check

Self Serve/Attend switch ifstandalone dispenser.

3. Nozzle switch defective Adjust or replace switch.or misadjusted.

4. Defective push to start Check push to start switch.switch or switch Troubleshoot switch interfaceinterface circuitry. circuitry as in failure above.


One or more digits or 1. Defective display Replace the faulty displaysegments fail to operate assembly. assembly.during reset cycle.

2. Defective data cable. Replace data cable.

3. Defective computer. Replace computer.

50



Unit price not correctly 1. Loose or defective Re-seat or replace data cable.displayed. data cable.

2. Defective unit pice Replace unit price display board.display board.

Computer resets but 1. Check fuse F1 on Replace as necessary.valves do not open. Solenoid drive board.

2. Solenoid drive board Replace solenoid drive board.defective. Check for110 VAC output fromsolenoid drive board.

3. Defective actuator coil. Check coils for continuity; if opencircuit replace defective coil.

4. Defective/stuck Check both valves. Replace oractuator or diaphragm. rebuild as necessary.

5. Defective computer Replace.assembly.

Computer resets but 1. Solenoid drive board Replace if necessary.submersible pump not turning on relay.does not come on. Check F1 fuse on

drive board.

2. Defective solenoid Replace if no output.drive board. Checkfor 110 VAC outputfrom board.

3. Defective relay. Replace relay.

4. Faulty station wiring. Correct wiring.If 110 VAC is present at drive board and indispenser junction box,but not at relay panel,problem is in stationwiring.

5. Defective computer Replace computer. assembly.

51



Fault code 01*. Push to start switch open or cash/credit switch shorted.

1. Defective push to start Check the switch(es) and replaceor cash/credit switch. the as necessary.

2. Defective switch Check all wiring from the suspectwiring. switch to the lighted cash/credit

interface board; repair or replacethe wiring as necessary.

3. Defective lighted Replace the cash/creditcash/credit interface interface board.board.

4. Defective computer. Replace the computer.

Fault code 02*. Pushbutton start option disabled but switch detected.

1. Defective wiring. Check the two wires in the DEMwhich are connected to the twowire connector at the lower leftcorner of the DEM (where thepush to start switch normally isconnected). Repair or replace thewiring as necessary.

2. Defective lighted cash/ Replace the cash/credit interfacecredit interface board. board.

3. Defective computer. Replace the computer.

Fault code 03*. Unit has run over preset/prepay amount.

1. Solid state relay on . Check for 110VAC output tosolenoid drive board valve(s) with handle off. Ifshorted. 110VAC is present, replace

solenoid drive board.

2. Debris in diaphragm Check/clean all valves.valve or actuator.

3. Defective diaphragm Install diaphragm service kit.valve.

4. Defective actuator. Replace actuator.


* To clear the error message it is necessary to either cycle the power to the Duplex Computer or enter option99, change the data to 3 and exit option programming. Even if the problem is corrected the fault code willcontinue to be displayed until one of the procedures mentioned above is executed.

52



Fault code 04*. ROM error.

1. Computer found Clear error. If problem reoccursdefective ROM chip replace computer.during self test.

Fault codes 05 or 20. * Pulser jitter.

1. Cracked or broken disc. Replace pulser disc.

2. Dirt blocking opening . Clean pulser disc.on pulser disc

3. Dust in housing. Clean dust from housing andphotocoupler. Adjust disc to keepit from rubbing on photocoupler.

Note: Dust blocking one phase of the photocoupler can cause the same symptoms as a defec-tive photocoupler. If dust is found in the housing do not replace the photocoupler unless theerror reoccurs.

4. Disc tension is not Adjust or shim wave washers oncorrect. pulser shaft assembly.

5. Misalignment Drive shaft must be aligned inbetween pulser drive center of coupling gear on meter.shaft and coupling To align, loosen mounting boltsgear on meter. on pulser housing and reposition

housing.

6. Defective photocoupler. Replace.

7. Air in system causing Repair or replace faulty piping;severe hydraulic shock. purge all air from system.

8. Loose plug or wire Correct wiring.connection.

9. Defective solenoid Replace solenoid drive board. drive board.


Fault code 06*. Illegal current sensed in valve or relay circuit.

1. Solenoid drive board Replace solenoid drive board.has defective solidstate relay.

2. Computer is holding Replace computer.solid state relay on.


53



Fault code 08*. Time out limit exceeded. The dispenser was turned on but noproduct was dispensed for more than the programmed time limit(see Programming for the Duplex II Computer—Service, partnumber 917479, Option 12). Operational error no corrective action.

Fault codes 10 or 21. * Reverse pulse.

1. Disc tension is not Adjust or shim the wave washer correct. on pulser shaft.

2. Debris holding Repair as necessary.diaphragm or actuatoropen.

3. Defective diaphragm Install diaphragm repair kit.valve.

4. Defective actuator. Replace the actuator.

Fault code 11. Corrupted option programming.

1. Computer found Check all option programmingscrambled data in and set option 99 to 03 to clearoption programming. error.

Note: If error reoccurs replace computer.

Fault code 12*. Totals data was found corrupted and reset to zero.

1. If error reoccurs- Replace computer.defective computer.

Fault code 13*. Unit price data was found corrupted and reset to zero.

1. If error reoccurs- Replace computer.defective computer.

Fault codes 14, 15 or 16. * Illegal pulse-a pulse was received from a”grade not selected”.

1. Debris holding Check/clean all valves.diaphragm or actuatoropen.

2. Defective diaphragm. Install diaphragm repair kit.

3. Defective actuator. Replace actuator.

4. If dispenser is V390/U Check restrictor plates on meter model supports of unselected product.(Single Hose MGD) Clean/replace as needed.

5. Shorted relay on If AC is present (the same voltagesolenoid drive board. as AC input) replace solenoidCheck for AC output drive board.with dispenser off.



54



Fault code 51*. Blend ratio error exceeded programmed limits.

1. Flow restricted on Observe the blend valve whileone end grade. dispensing to determine which

grade is restricted. As product isdispensed the valve will movetowards either “HI OFF” or “LOOFF”. The opposite grade has therestriction. Check all valves andflow tubes for obstructions.Clean strainer and change filter.

2. Binding of linkage Check linkage for free movementfrom blend motor to and interference from other parts.blend valve. Correct as necessary.

3. Leak between Replace “O”-ring betweenchambers in blend chambers.Replace blend valve.valve.

4. Defective solenoid Replace the solenoid drive board.drive board.

5. Defective F2 on Replace F2.computer.


7. Defective blend Replace blend motor.motor. †

† To check for a defective Blend Motor disconnect the linkage between the blend motor andblend valve. Initiate a dispenser reset by removing the nozzle and making a grade selection.Observe the blend motor shaft for movement after making a grade selection. If the motor failsto turn and probable causes 1 through 6 above have been eliminated, the blend motor and/orthe wiring between the blend motor and the solenoid drive board is likely to be defective.


55


7. COMPONENT REPLACEMENT

This section describes the procedures necessary to replace the major components in Waynedispensers.

7.1. ELECTRONIC COMPONENT REPLACEMENT

Caution: Before replacing any components, power should be removed from the system.Additionally, totals should be read and recorded in case of memory alteration.

When removing or installing one of the electronic components within the computerhousing, take care not to contact one component with another. Contact between compo-nents might cause damage to the circuit board coating, circuit board tracks, or circuitcomponents.

Before replacing any components, servicing personnel must wear a static guard wriststrap (Dresser part number 916962 or equivalent) securely attached to an earth groundingpoint in order to prevent damage to electronic components due to static electricity.

Always keep replacement components in their anti-static shipping bags until they areinstalled. Put replaced suspect components in the anti-static bags for return to the factoryin original packaging and fill out a return parts tag.

After having replaced a component, make a thorough visual inspection of your work toensure that:

1. All connections are secure.2. All mounting hardware is secure.3. There are no loose washers, screws, tools, etc., lying around which might cause a

failure.

7.1.1. Removing the Bezel From Vista Dispensers

In order to access any of the electronic components the bezel must be re-moved; to remove the bezel perform the following steps:

1. Lower the ad panel holder frame by pulling the holder frame out and downfrom the top (see Figure 2-1).

2. Lowering the ad panel down toward you, exposes the function switchaccess door and the thumbscrews or bezel locks which secure the bezel tothe dispenser.

3. Unscrew the thumbscrews, or unlock the bezel locks.

56


7.1.1. Removing the Bezel From Vista Dispensers, continued

4. Pull the bottom portion of the bezel out toward you, then pull the bezeldown clear of the drip edge.

5. Use the reverse procedure to install the bezel.

7.1.2. Computer Assembly Replacement (see Figure 7-1)

Note: The computer assembly and displays contain circuitry which is sensitive to staticdischarge. Keep the replacement computer assembly in the anti-static shippingbag until ready for use. Always place the suspect computer base in the anti-staticshipping bag after replacement and return to the original packaging.

Important: When installing a Duplex II computer in a non-blending dispenser JP2 andJP3 must have jumpers installed on the two pins closest to the center of thecomputer board.

1. Record the totalizer readings if the totalizer is functional.

2. Turn OFF the control power.

3. Put the appropriate switch in the data distribution box to bypass.

4. The computer is located behind and below the consolidated display on thejunction box side of the dispenser. To access the computer, or solenoiddrive board, disengage the two quarter turn screws located above the leftand right corners of the display. The Dispenser Electronic Module (DEM)will then tilt out toward you to provide access to the internal electroniccomponents of the dispenser.

5. Disconnect all cables before removing the computer assembly. (Theconnectors have two latches which must be squeezed to disengage themfrom the board.)

6. Remove the screws securing the computer base assembly to the housing.

7. Lift the computer assembly out of the chassis.

8. Remove the solenoid drive board and install on the new computer assembly.

9. Install the new computer assembly and secure with the hardware removedin Step 6.

10. Connect all cables to the computer assembly.

11. Set the switches in the data distribution box back to auto.

57


FIGURE 7-1. REPLACING THE DUPLEX II COMPUTER

58


7.1.2. Computer Assembly Replacement, continued

12. Replace the DEM in its original position and turn the control power ON.

13. Program the dispenser as follows:

a. Set the macro and all option programming.b. Set the unit prices (if stand-alone); orc. Set the fueling point number.

14. Reinstall the bezel.

15. Record totals a second time and give both sets of totals to the dealer/manager for his or her records.

7.1.3. Intrinsic Safe Barrier PCB Replacement (see Figure 7-2)

The Intrinsic Safe Barrier PCB is mounted to the bottom of the electronicsenclosure under a black metal cover.

1. Remove the bezel opposite the junction box side.

2. Remove black metal protective shroud.

3. Remove connectors

4. Remove mounting screws from PCB assembly.

5. Replace with new board using the reverse procedure.

7.1.4. Display Board Replacement (see Figure 7-3)

1. Remove the bezel from the dispenser.

2. Remove the dial face from the display by loosening the four screws in thecorners of the dial face and then slipping it up and off of the display.

3. Disconnect the data cable(s) from the sale display.

4. Remove the screws securing the display assembly. Remove the sale display.

5. Install the new display and secure it with hardware removed in Step 4.

6. Reconnect the data cable(s) from the sale display.

7. Reinstall the dial face and bezel.

59


FIGURE 7-2. REPLACING THE INTRINSIC SAFE BARRIER BOARD

60


FIGURE 7-3. REPLACING THE INTEGRATED DISPLAY BOARD

61


7.1.5. Cash/Credit Interface Board Replacement (see Figure 7-4)

1. In order to access the cash/credit interface board remove the bezel fromthe dispenser and disengage the two quarter turn screws located above thedisplay. This will allow the DEM to tilt out toward you allowing access toall internal electronic components in the dispenser.

2. Disconnect all wiring harnesses from the interface board.

3. Remove the screws which secure the board to the frame of the DEM.

4. Remove the cash/credit interface board.

5. Install the new board using the hardware removed in step 3.

6. Reattach all wiring harnesses to the new board.

7. Replace the DEM in its original position and reinstall the bezel.

7.1.6. Solenoid Drive Board Replacement (see Figure 7-5)

Note: Even though the dispenser control power is turned off voltage may still bepresent at the solenoid drive board, this condition will continue until both 15pin connectors are removed from the solenoid drive board.

In order to replace the solenoid drive board perform the following steps:

1. Turn the power to the dispenser OFF, and lock and/or tag the circuitbreaker in the OFF position.


3. Place the DEM in the service position.

4. Disconnect all of the wiring harnesses from the solenoid drive board.

5. Remove the one (1) screw shich secures the solenoid drive board to theDuplex II computer.

6. Pull the solenoid drive board straight off of the computer.

7. Install the new board using the reverse of the procedure described above.

8. Test the dispenser for proper operation.

62


FIGURE 7-4. REPLACING THE LIGHTED CASH CREDIT INTERFACE BOARD

63


FIGURE 7-5. REPLACING THE SOLENOID DRIVE BOARD

64


7.1.7. Photocoupler/Pulser Disc Replacement

Note: Pulser discs are fragile. Care should be taken when removing the pulsercomponents.

1. Remove the hex head 1/4-20 screws and cover from the pulser assembly.

2. Disconnect the cable to the photocoupler.

3. Remove the screw holding the photocoupler to the housing and loosen theset screws holding the pulser disc on the shaft. Pull pulser parts up andout of the housing.

4. Slip the new pulser parts into the housing. Tighten the screw holding thephotocoupler. Adjust the disc so it is centered in the slot and tighten theset screws. Centering the disc is very important to avoid damage to thephotocoupler and disc. On newer dispensers the pulser shaft will have a“step” on it; in these dispensers simply push the pulser disc down until itcontacts the step and tighten the screws the disc will automatically becentered.

5. Reconnect the cable to the photocoupler.

6. Rotate the disk through two or three revolutions to insure that it does notcontact the photocoupler.

7. Replace the cover with the hex head screws removed in step 1.

7.1.8. Nozzle Boot Switch Replacement

A. MICRO SWITCH STYLE

Note: It may be necessary on certain model dispensers to remove the nozzle boot in orderto access the handle switch. If so, remove the nozzle boot taking care to disconnectthe wiring harness from the handle switch as the boot is being removed.

1. Remove the two (2) 6-32 screws which secure the handle switch to itsmounting bracket.

2. Install the new switch using the previously removed screws.

3. Reinstall the nozzle boot if it was previously removed.

4. Connect the wiring harness to the head of the dispenser.

5. Test the handle switch for proper operation, and adjust as necessary (seesection 4.1 in this document).

65


7.1.8. Nozzle Boot Switch Replacement, continued

B. TILT SWITCH STYLE

1. Disconnect the 2-pin connector.

2. Remove the return spring from the switch assembly.

3. Push the end of shaft that protrudes through the nozzle boot until shaft isfree and remove the switch assembly from the flipper and nozzle boot.

4. Align the holes in flipper with holes in nozzle boot casting by holding theflipper up to the inside top of the nozzle boot.

5. Insert the shaft of the replacement tilt switch assembly through the alignedflipper and nozzle boot holes until the shaft snaps into place. Be certainthat the shaft snaps into place since this will lock the shaft and flipperassemblies together.

6. Reattach the return spring.

7. Reconnect the 2-pin connector.

8. Test the switch for proper operation by verifying that the dispenser resetswhen the flipper is released. If the dispenser fails to reset use a VOM orohmmeter to check for continuity across the switch assembly leadwires atthe 2-pin connector.

7.1.9. Actuator Module Replacement (Modules with Incandesent Lamps)

The actuator module is the “bar” located just below the display board; ithouses the push to start switches and the lights for the lighted buttons.

1. Remove the bezel and disengage the two quarter turn screws locatedabove the display; this will allow the DEM to be tilted out toward you.

2. Disconnect all wiring harnesses which connect the actuator module to thelighted cash credit interface board (note the position of each of the har-nesses so that they can be replaced in their original positions).

3. Tilt the DEM back into its original position.

4. Remove the four phillips head screws (one in each corner) from theactuator module (you will have to hold the studs that the screws are at-tached to with a pair of pliers to keep them from turning). There aresprings behind the actuator module, be careful not to lose them in thedisassembly.

66


7.1.9. Actuator Module Replacement (Modules with Incandesent Lamps),continued

5. Install the new actuator module using the reverse procedure; reconnect thepreviously removed wiring harnesses making sure to place them in theiroriginal positions.

6. Test for proper operation.

7.1.10. Actuator Module Replacement (Modules with High Intensity LEDs)


2. Disconnect the two wiring harnesses from the LED board.

2. Remove the nine Phillips head screws which secure the printed circuitboard and switches to their housing.

3. Remove the printed circuit board and switches.

4. Install the new printed circuit board and switches using the previouslyremoved screws.

4. Reconnect all wiring harnesses and test for proper operation.

7.1.11. Lighted Button Lamp Replacement


2. Unscrew the light, with its plastic cover, from the socket (these smalllamps are removed like a light bulb).

3. Install the new lamp and replace the bezel.

4. Test for proper operation.

7.1.12. Back Lit Display Lamp Replacement


2. Tilt the DEM down to its service position by disengaging the two quarterturn screws located above the left and right corners of the display.

3. Disengage the finger lock screw that is now facing upward from behindthe display on either side of the DEM chassis.

67


7.1.12. Back Lit Display Lamp Replacement, continued

4. Remove the bracket containing the lamp holder and lamp.

5. Install the new fluorescent lamp and reinstall the bracket.

6. Secure the DEM back in its original position.

7. Reinstall the bezel.

7.2. HYDRAULIC COMPONENT REPLACEMENT

7.2.1. Installation of Diaphragm

Note: Before removing any parts from the diaphragm valve, trip the impact valve,and shut OFF the submersible pump for the product in question.

1. Remove the four (4) bolts and the diaphragm cover.

2. Remove all existing parts and discard them. With the exception of the centersection and cover, which must be reused. Take note of the position of the partsas they are removed so the new parts can be installed the same way.

3. The perforated back up plate must be installed first, with the dished centerhole located around the valve seat and the higher outside diameter levelwith the valve body. Care must be taken during assembly to be sure theplate has not slipped and become pinched between the diaphragm and thebody. Be sure to install the red tinted back up plate in diaphragm castingswith three tabs around the outer perimeter of the diaphragm bore; installthe plain plate in castings with four tabs (see the installation instructionsincluded with the diaphragm kit for further information).

4. The spring must be seated squarely in the spring cup so that it will stay inplace when the valve plate is installed. The relief valve must enter the endof the spring without dislodging the spring from the spring cup.

5. The notched gasket must be between the center section and cover, and thegasket with the hole between the center section and the body.

6. Hand tighten the four (4) bolts, using a criss-cross pattern until the bolt headsjust contact the valve cover. Continue this pattern increasing torque until allbolts are fastened to a torque of 9-11 ft.-lbs. This torque must not be exceededin order to keep the gaskets from deforming and covering the ports.

7. Check operation and inspect for leaks.

68


7.2.2. Diaphragm Valve


1. Remove the three (3) bolts which secure the diaphragm valve to thestrainer casting.

2. Remove the three (3) bolts which secure the diaphragm valve to the metersupport.

3. Remove the two (2) bolts which secure the diaphragm valve to the rear ofthe junction box, and pull the diaphragm valve free.

4. Remove the two screws which secure the actuator to the diaphragm cast-ing and remove the actuator.

5. Install the actuator onto the new diaphragm casting and reinstall thediaphragm, using the reverse procedure. Be sure to use a new gasketbetween the diaphragm and the strainer casting.


7.2.3. Actuator


1. Remove the diaphragm as in Section 7.2.2.

2. Remove the actuator from the diaphragm valve casting by first removingthe two screws which secure it.

3. Install the new actuator, and reinstall the diaphragm.


69


7.2.4. Meter

Note: Before removing the meter, trip the impact valve and shut OFF the submers-ible pump for the product in question.

1. Remove the four (4) bolts which secure the meter to the meter support.

2. Remove the meter. Note the position of the two (2) “O” rings so that theymay be replaced in the proper location.

3. Reinstall the meter using the previously removed bolts. Take care that the“O” rings remain in their proper positions.


7.2.5. Blend Valve

Note: Before removing the blend valve, trip the impact valve and shut off the sub-mersible pump for the products in question.

On some dispenser models, one of the blend valves will be located inside theside column of the dispenser. Verify the location of the valve by visuallyfollowing the linkage from the blend motor to the valve.

1. Disconnect the blend motor to blend valve linkage at the blend valve.

2. Remove the four bolts which secure the valve to the hose outlets.

3. Remove the six bolts which secure the valve to the inlet tubes.

4. Remove the blend valve. Be sure to provide some means of catching theproduct which is spilled from the dispenser.

5. Install the new blend valve using the reverse procedure. Be sure to usenew gaskets on the inlet to the valve.

6. Purge all air from the dispenser and check for proper operation.

70


71


APPENDIX A

TROUBLESHOOTING FLOWCHARTS

When troubleshooting problems related to fault codes generated by the duplex computer, itis necessary to correct the problem and cycle the control power to the computer or enter a3 in option 99 in order to clear the message. Even if the problem is corrected the errormessage will continue to be displayed until the power is cycled, or option 99 is entered andchanged to a 3.

72


73


FLOWCHART A-1. 01 FAULT CODE

01 fault code.Push to start switchopen or cash/credit

switch shorted.

Defective switch.Check with VOM

for continuity whenswitch is on.

Does theswitch check

good?

Check the wiring tothe switch. Repair

or replace thedefective wiring.

END

Replace thedefective switch.

YES

NO

JDB

-FH

-218

-A

Is theproblem

corrected?

NO

YES

Replace thecomputer.

Replace thelighted cash

credit interfaceboard.

74



02 fault code.Pust to start

option disabledbut switchdetected.

Ensure that thetwo wires normallyconnected to thePTS switch are

shorted .

Replace the wiringwhich would attachto the PTS switch.

Is theproblem

corrected?

Replace the lightedcash credit interface

board.

Is theproblem

corrected?


YES

NO

YES

NO

END

JDB

-FH

-219

-A

75



03 fault codeunit has run overpreset amount.

Check for 110VACfrom solenoid drive

board holdingvalve(s) open.

Is 110VACpresent when itshould not be?

Check diaphragm forleaks or debris holding

it open. Replace orclean as necessary.

Replace the twostage actuator.

Is theproblem

corrected?


END

Replace thesolenoid drive

board.YES

YES

NO

NO

JDB

-FH

-139

-B

Is theproblem

corrected?YES

NO

76


04 fault code.ROM error.

Does theerror

reoccur?

Replace computer.

END

NO

YES

SG

M-F

H-1

03

Computer founddefective ROM chip

during self test.Clear erroo.


77


2 05 or 20 fault code.

Pulse jitter error.

Check pulser disc forcracks or blocked

openings.Repair/replaceas necessary.

Is there dust onthe photocoupler?

Is there tensionon the pulser disc?

Check all connectionsfrom the photocouplerto the computer andthe solenoid drive

board.

Is the wiring OK?

Replace photocoupler.

Is the problemcorrected?

Replace the solenoiddrive board.

Is the problemcorrected?


END

Clean dust fromphotocoupler.

If problemreoccurs replace

photocoupler.

Shim pulsershaft.

Are thepulser shaft andthe meter drivegear aligned?

Align pulser shaftand meter drive

gear.

2

NO

YES

NO

NO

YES

YES

NO

YES

NO

JDB

FH

-138

-SM

1

Repair/replacethe wiring.

Is the problemcorrected?YES 3

3

YES

YES

NO

NO

FLOWCHART A-5. 05 OR 20 FAULT CODE

78


06 fault code.Computer senseda valve or relay onwhen it should not

be.

Check the solenoiddrive board for 110VAC

output to a valve orrelay.

Is 110VACpresent?

Replace solenoiddrive board.

Replace computer.

Is theproblem

corrected?

Replace computer.

END

YES

NO

NO

YES

JDB

-FH

-140

-A


79


08 fault code.Time out

limit exceeded.

See Option 12in the Duplex IIprogramming

manual.

Operational errorno corrective

action.

END

SG

M-F

H-1

04

Dispenser was turnedon but no product wasdespensed for more

than the programmedtime limit.


80


10 or 21fault code.

Reverse pulse error.

Is thereenough tensionon the pulser

disc?

Is thepulser shaft

aligned with thedrive gear?

Ensure that all airis purged from the

undergroundsystem.

END

Shim the pulsershaft.

Align the pulser shaftwith the meter drive

gear.

YES

NO

JDB

-FH

-142

-SM

1

NO

YES

Erroroccurs while

dispensing blendat proportional

blender?

Whiledispensing

feedstock atproportional

blender?

Ensure that bothsubmersible pumps

are operating at equalbypass pressures.

Correct as necessary.

Check for leakingflow control valves

on the oppositefeedstock from

that being dispensed.Correct as necessary.

NO

NO

YES

YES YES

YES

Is theproblem

corrected?

Is theproblem

corrected?

1

11


Is theproblem

corrected?

YES

NO

Is theproblem

corrected?

YES2

2NO

NO

NO

FLOWCHART A-8. 10 OR 21 FAULT CODE

81



11 fault code.Corrupted option

programming.

Does theerror

reoccur?

Replace computer.

END

NO

YES

SG

M-F

H-1

05

Computer foundscrambled data in

option programming.

Check all optionprogramming and

clear error by settingOption 99 to data 03.

82


12 fault code.Corrupted totals

data.

Does theerror

reoccur?

Replace computer.

END

YES

SG

M-F

H-1

06

Computer foundthe totals datato be corruptedand reset thedata to zero.

Check that salesare now being

totaled correctll.

NO


83


13 fault code.Corrupted unit

price data.

Does theerror

reoccur?

Replace computer.

END

YES

SG

M-F

H-1

07

Computer foundthe unit price data

to be corruptedand reset thedata to zero.

Re-enterunit

pricess

NO


84


14, 15, or 16 fault code.

Illegal pulse; a pulsewas recievedfrom a gradenot selected .

Check diaphragm valveof unselected product

for leaks or debrisholding it open. Cleanor repair as necessarr.

SG

M-F

H-1

00

NO

Check solenoiddrive board for110VAC outputto valves whenthere should

be none.

Is there110VACpresent?

Replace the twostage actuator.

Is theproblem

corrected?


END

Replace thesolenoid drive

board.

NO

YES

NO

Is dispenser aV390/U SingleHose MGD ?

NO

YES

YESCheck restricter valve(on meter support of

unselected product) forleaks or debris holding

it open. Clean orrepair as necessary.

Is theproblem

corrected?

Is theproblem

corrected?YESNO

YES

FLOWCHART A-12. 14, 15, OR 16 FAULT CODE

85



51 fault code.Blend ratio error

exceededprogrammed

limits.

Does theblend motormove during

reset?

Check all valves andtubes for flow

restriction.

Is there anyrestriction in the

flow?

Check blend valve forleaks between

chambers crackedshoes. Repair/

replace as necessary.

Replace thesolenoid

drive board.

Is theproblem

corrected?


END

Check the linkage tothe blend valve forbinding. Correct as

necessary.

Correct flowrestriction.

YES

NO

YES

NO

YES

JDB

-FH

-143

-A

Is theproblem

corrected?

NO

2

2

Option 52should be set at5%. Option 53should be set at2 gallons. Reset

as necessary.

NO

YES

Is theproblem

corrected?

Check F2 on thecomputer. Replace

as necessary.

Is theproblem

corrected?

3

YES

YES

NO

NO

3

86


Sale display and unitprice displays are

blank.

Check F1 and F3fuses on the

computer. Replaceif defective.

Is there110VAC between

pins 1 and 2 on theJ5 connector?

Replace the display.


Is 110VACpresent in

junction boxterminal 1?

Correct station wiring.

Make sure controlpower circuit

breaker is ON andpower is present.

Repair/replacedefective internaldispenser wiring.

END

YES

NO

YES

NO

JDB

-FH

-215

-A

Is theproblem

corrected?YES

NO

FLOWCHART A-14. DISPLAYS ARE BLANK

87


Display(s) scrambledor missing segments.

Replace displayboard.

Is theproblem

corrected?

Replace data cable.

Is theproblem

corrected?


END

YES

YES

NO

NO

JDB

-FH

-216

-A

FLOWCHART A-15. DISPLAYS SCRAMBLED

88


FLOWCHART A-16. UNIT WILL NOT RESPOND TO INDIVIDUAL FUNCTION SWITCH

Sale display is on;unit will not respond

to an individualfunction switch,

i.e., the totals switchworks but the price

jog does not.

Defective switch.Check with VOM

for continuity whenswitch is on.

Does theswitch check

good?

Check the wiring tothe switch. Repair

or replace thedefective wiring.

END

Replace thedefective switch.

JDB

-FH

-217

-A

Is theproblem

corrected?

NO

YES


Replace thelighted cash

credit interfaceboard.

YES

NO

89


Sale display on unitwill not respond to

any function switches.

Defective switchescheck with VOM

for continuitywhen switch is

on.

Do switchescheck good?

Defective wiring toswitches; check all

wires; repair orreplace as needed.

Defective cash/creditinterface board.

Replace asnecessary.

Is theproblem

corrected?


END

Replace the switches.

YES

NO

YES

NO

JDB

-FH

-211

-B

Blown fuse oncash/credit

interface board.Replace asnecessary.

Is theproblem

corrected?

Is theproblem

corrected?

NO

NO

YES

YES

FLOWCHART A-17. UNIT WILL NOT RESPOND TO ANY FUNCTION SWITCHES

90


Displays are on butthe unit will not

reset.

Defective handleswitch or wiring to

switch. Refer to theproper wiring diagramcheck for continuity atplug on computer with

handle on.

Is therecontinuity atcomputer?

Check forcontinuity at the

switch.

Is therecontinuity atthe switch?

Is there acontrol system

installed?

Check self-serve/attend switch.

Replace ifdefective.

Is thedispenser

authorized?

Is thedispenser

communicating?Check fueling pointat dispenser. Reset

if necessary.

Is theproblem

corrected?

Authorize dispenserfrom the control

system.

Replace thehandle switch.


END

Replace defectivewiring harness.

YES

NO

YES

NO

NO

YES

NO

YES

YES

NO

YES

NO

JDB

-FH

-210

-B

DefectivePush-to-Start

switch or wiring.Correct asnecessary.

Blown fuse on,or defective,cash/credit

interface board.Correct asnecessary.

Is theproblem

corrected?

Is theproblem

corrected?

NO

NO

YES

YES

FLOWCHART A-18. UNIT WILL NOT RESET

91


FLOWCHART A-19. UNIT RESETS BUT WILL NOT DISPENSE

Dispenser resets butwill not dispense

product.

Check the F1 fuseon the solenoid driveboard. Replace if it is

open.

Check for 110VACoutput from thesolenoid drive

board to the relay(s)and the solenoid

valve(s).

Is 110VACpresent?

Check actuator, orrelay coil forcontinuity.

Is thecoil reading

an open circuit?

Check for 110VACon valve and relayselect wires in the

junction box.

Is 110VACpresent?

Replace defectiveactuator or relay.

Replace the actuatorcoil or the relay.

Repair or replace thedefective internaldispenser wiring.

Replace solenoiddrive board.

END

Is theproblem

corrected?

Replace defectivecomputer.

NO

YES

YES

NO

NO

YES

YES

NO

JDB

-FH

-151

-B

Is theproblem

corrected?

NO

YES

92


FLOWCHART A-20. UNIT PRICES SHOW 0.000

Unit price showing0.000.

Is therea control system

installed?

Manually set pricesin dispenser. If theproblem reoccurs

replace the computer.

Is thisthe only

fueling point with0.000 for unit

prices?

Check the fuelingpoint in this dispenser.

Reset if necessary.

Is theproblem

corrected?

Replace thecomputer(s).

Ensure that thedispensers in

question are notset to the same

fueling pointnumber.

Are allaffected dispensers

on the samedata loop?

Refer to the servicemanual for the control

system which isinstalled.

END

YES

NO

NO

YES

YES

NO YES

NO

JDB

-FH

-148

-A

93


APPENDIX B.

ELECTRONIC/ELECTRICAL COMPONENT TROUBLESHOOTING

94


95


B.1. INTRODUCTION

This Appendix describes in detail the troubleshooting of the various electronic andelectrical components used in Vista series blending and non-blending dispensers (seeFigure B-1 for a typical Vista dispenser). All electronic components discussed in thissection are located in the dispenser electronic head. The blend motor, one electricalcomponent discussed here, is located in the dispenser junction box.

TotalGallons

$

REGULAR PLUS SUPER

Nozzle Boot

Ad Panel

"Push-to-Start" Bar

Unit Price Display

Main Sale Display

Bezel

FIGURE B-1. TYPICAL VISTA DISPENSER

B.2. REMOVING THE BEZEL FROM THE DISPENSER

In order to test the electronic components you must first remove the bezel from the dispenser.To remove the bezel from the dispenser perform the steps shown in Figure B-2.

Warning: The following actions require that the electrical power to the equipment be on.Remember that electrical power is dangerous and proper precautions to pro-tect oneself from contact with the electrical power are necessary.

96


Note: On new style Vista bezels (without phillips head screws shown below)the ad panel is lowered by simply pulling the ad panel out and down fromthe top of the ad panel holder. See also, Figure 2-1 in Section 2.

FIGURE B-2. REMOVING THE BEZEL FROM VISTA DISPENSERS

97


B.3. THE DISPENSER ELECTRONIC MODULE (DEM)

To move the DEM into the service position perform the steps shown in Figure B-3and B-4.

Once the DEM is tilted into the service position you will have access to all of the elec-tronic components in the dispenser. It may or may not be necessary to remove the bezelfrom the rear of the dispenser to access the electronics on that side.

FIGURE B-3. DEM REMOVAL

98


FIGURE B-4. THE DEM IN THE SERVICE POSITION

99


B.4. TESTING THE DUPLEX II COMPUTER

There are four functions of the Duplex II computer which can be readily field tested;these four functions are as follows:

• AC output to the solenoid drive board

• Output to the pulsers and handle switches

• Power output to the displays

• Output to the annunciators

• Power output to the preset control board

In addition to these four functions the input power to the computer and the pico fuseson the computer can be tested. The Duplex II computer is shown in Figure B-5 andthe pinouts of the various connectors on the computer are shown in Figures B-6through B-10.

FIGURE B-5. DUPLEX II COMPUTER

100


FIGURE B-6. DUPLEX II COMPUTERS J3 CONNECTOR PINOUT

101


FIGURE B-7. DUPLEX II COMPUTERS J9 AND J10 CONNECTOR PINOUT

102



103



104


FIGURE B-10. DUPLEX II COMUTERS J1 CONNECTOR PINOUT

105


B.4.1. The AC Input to the Solenoid Drive Board

To test the AC input to the solenoid drive board perform the following steps:

• Set your meter on AC at a voltage corresponding to the control power ofthe dispenser.

• Place the common lead of your meter on pin 1 of the Duplex II’s J8 con-nector (see Figure B-11).

• Place the positive lead of your meter on pin 2 of the J8 connector. Thereading should be the same as the dispenser control power.

FIGURE B-11. TESTING THE AC OUTPUT TO THE SOLENOID DRIVE BOARD

106


B.4.2. Output to the Pulsers and Handle Switches

The computer outputs +4.8 to 5.2 VDC to operate the pulsers and handleswitches. To test this output perform the following steps:

• Set your meter on the 20 VDC scale.

• Place the common lead of your meter in pin 2 of either the J9 or J10connector, place the positive lead in the pin controlling the function beingtested (see Figure B-12).

• Your meter should read +4.8 to 5.2 VDC, if not the computer is defective.

FIGURE B-12. TESTING THE OUTPUT TO THE PULSERS AND HANDLE SWITCHES

107


B.4.3. Power Output to the Displays

The data output from the computer to the displays cannot be readily field tested.The +4.8 to 5.2 VDC supplied to the displays from the computer, on the otherhand, can be tested. To test the 5 volts to the displays perform the following steps:


• Connect the common lead of your meter to pin 2 of either the J4 or J5connector (depending on whether the side 1 or side 2 display circuitry isbeing tested) on the computer (see Figure B-13).

• Connect the positive lead of your meter to pin 1 of the J4 or J5 connectoron the computer.

• Your meter should read +4.8 to 5.2 VDC if not the computer is defective.

FIGURE B-13. TESTING THE OUTPUT TO THE DISPLAYS

108


B.4.4. Testing the Output to the Annunciators (see Figure B-14)

The annunciators in Vista dispenser are driven by a +4.8 to 5.2 VDC signaloriginating on the Duplex II computer. To test the output to the annunciatorsperform the following steps:


• Place the common lead of your meter on pin 2 of either the J13 or J14 connec-tor (depending on the side of the dispenser which is being serviced).

• Place the positive lead of your meter on pin 1.

• Once the annunciator should be sounding (depending on option program-ming the annunciator may sound at different times) your meter shouldfluctuate from 0 to +4.8 to 5.2 VDC.

FIGURE B-14. TESTING THE OUTPUT TO THE ANNUNCIATOR

109


B.4.5. Testing the Power Output to the Preset Control Board

The computer provides the +4.8 to 5.2 VDC which is used to power the presetcontrol board and the preset display. In order to test this output, perform thefollowing steps:


• Insert the common lead of your meter into pin 6 of the Duplex II comput-ers J6 connector (see Figure B-15). Insert the positive lead of your meterinto pin 1 of the J6 connector.

• Your meter should read +4.8 to 5.2 VDC, if not the computer is defective.

FIGURE B-15. TESTING THE POWER OUTPUT TO THE PRESET CONTROL BOARD

110


B.4.6. Testing the Input Power to the Computer

In order to test the input power to the Duplex II computer perorm the follow-ing steps:

• Set your meter on AC at a voltage which corresponds to the control powerof the dispenser.

• Push the common lead of your meter into pin 2 of the Duplex IIcomputer’s J3 connector (see Figure B-16).

• Push the positive lead of your meter into pin 1 of the J3 connector.

• You should read the control power voltage; if not there is some problembefore the wiring reaches the dispenser computer.

FIGURE B-16. TESTING THE AC INPUT TO THE COMPUTER

111


B.4.7. Testing the Fuses on the Duplex II Computer

There are three pico fuses on the Duplex II computer; these look physicallysimilar to a resistor, but are beige in color. The pico fuses are socketed andare field replacable. The functions of the fuses are as follows:

• F1 fuses the input to the 5 VDC regulator on the computer.• F2 fuses the input to the 12 VDC regulator and is present on blending

computers only.• F3 fuses the AC input to the computer.

To test one of the pico fuses perform the following steps (see Figure B-17):

• Set your meter on AC at a voltage which corresponds to the dispensercontrol power.

• Touch one meter lead to each lead of the fuse being tested. You shouldread 0.0 VAC; if you read the control power the fuse is bad.

FIGURE B-17. TESTING THE PICO FUSES ON THE DUPLEX II COMPUTER

112


B.5. TESTING THE SOLENOID DRIVE BOARD

The solenoid drive board controls all of the AC switching in thedispenser; in addition the solenoid drive board switches the correctpulser ON at the proper time. Note: The following figures are shown for connectorinformation only. Figures B-18A, B-18B and B-18C identifies each of the connectors onthe various solenoid drive boards. Figures B-19, B-20A and B-20B identify each pin inthose connectors.

FIGURE B-18A. 3 PRODUCT SOLENOID DRIVE BOARD

113


FIGURE B-18B. 4 PRODUCT SOLENOID DRIVE BOARD

114


FIGURE B-18C. BLENDER SOLENOID DRIVE BOARD

115


FIGURE B-19. SOLENOID DRIVE BOARD CONNECTOR J1 AND J2 PIN DEFINITIONS

116


FIGURE B-20A. 4 PRODUCT SOLENOID DRIVE BOARD J3 AND J4 CONNECTOR PIN DEFINITIONS

117


FIGURE B-20B. BLENDER SOLENOID DRIVE BOARD J7 AND J8 CONNECTOR PIN DEFINITIONS

118


B.5.1. Testing the AC Output from the Solenoid Drive Board

To test the AC output from the solenoid drive board perform the followingsteps (see Figure B-21):

• Connect the negative lead of your meter to a neutral or an earth ground(pin 2 in the computers J3 connector will work).

• Push the positive lead of your meter into the pin representing the functionto be tested (do not disconnect the wiring harness from the solenoid driveboard).

• Set your meter on AC at a voltage corresponding to the control power ofthe dispenser being serviced.

• Remove the nozzle from the position being serviced and press the push tostart button. You should read the control power voltage (when testing thefast valve output a small amount of product must be dispensed before anyvoltage will be read).

FIGURE B-21. TESTING THE AC OUTPUT FROM THE SOLENOID DRIVE BOARD

119


B.5.2. Testing the Pulser Select Circuits

In order to test the pulser select circuitry on the solenoid drive board performthe following steps:

• Place the positive lead of your meter in either pin 4 or 7 of connector J9 or 10.Place the common lead of your meter on an earth ground (the frame of thedispenser). You should read +1.1 to 1.3 VDC, if not move the positive lead ofyour meter to the other pins mentioned above until you read 5 volts.

• Move the common lead of your meter to the pin corresponding to thefunction being tested (see Figure B-22) (do not remove the wiring har-ness). Figures B-19, B-20A and B-20B detail the functions of each of thepins in the connectors on the solenoid drive board.

• Remove the nozzle from the position being serviced and press the push tostart button.

• Once the reset cycle is complete you should read +1.1 to 1.3 VDC, if notthe solenoid drive board is bad.

FIGURE B-22. TESTING THE PULSER SELECT CIRCUIT

120


B.6. TESTING THE OUTPUT FROM THE PHOTOCOUPLER

The photocoupler is located in an explosion proof housing in the hydraulic cabinet. Inorder to test the output from the photocoupler perform the following steps:


• Place the common lead of your meter in the “pulser select pin” for the nozzle positionbeing serviced (see Figure B-23). Figures B-19 and B-20A and B detail the functions ofthe connectors on the solenoid drive board. Place the positive lead of your meter in pin 3of either the J9 or J10 connector (depending on the side of the dispenser being serviced).

• Manually rotate the pulser drive gear on top of the meter (see Figure B-24); if the photo-coupler is operating properly your meter should fluctuate from 0 to +4.8 to 5.2 VDC.

• If the reading in pin 3 is found to be correct move the positive lead of your meter topin 6 and perform the test again.

• If either Pin 3 or pin 6 reads a constant 0 or +4.8 to 5.2 VDC the photocoupler isdefective and should be replaced.

FIGURE B-23. TESTING THE OUTPUT FROM THE PHOTOCOUPLER

121


FIGURE B-24. MANUALLY TURNING THE PHOTOCOUPLER

122


B.7. INTRINSIC SAFE BARRIER BOARD

The intrinsic safe barrier is in the wiring with the handle switches; it uses zener diodes inorder to eliminate the possibility of introducing over 5 VDC into the hydraulics cabinet.Figures B-25 through B-27 show the connectors on the intrinsic safe barrier, and theirpinouts.

FIGURE B-25. INTRINSIC SAFE BARRIER J1 AND J4 CONNECTOR PINOUT

123


FIGURE B-26. INTRINSIC SAFE BARRIER J2 AND J5 CONNECTOR PINOUTS

124


FIGURE B-27. INTRINSIC SAFE BARRIER J3 AND J6 CONNECTOR PINOUT

125


B.7.1. Testing the Intrinsic Safe Barrier

In order to test the intrinsic safe barrier perform the following steps (seeFigure B-28):

• Remove the black cover which conceals the intrinsic safe barrier in thehead of the dispenser.

• Set your meter on DC voltage on the 20 volt scale.

• Push your common meter lead into any of the pins which are identified ascommon (see Figures B-25 through B-27) and the positive lead into theposition to be tested.

• You should read +4.8 to 5.2 VDC, if you read less than this the intrinsicsafe barrier is defective and should be replaced.

FIGURE B-28. TESTING THE INTRINSIC SAFE BARRIER BOARD

126


B.8. LIGHTED CASH CREDIT INTERFACE BOARD

The Lighted cash credit interface board senses all of the inputs from the dispenser func-tion switches, and the cash/credit and push to start switches. In addition it regulates thepower to the lighted cash/credit and push to start buttons. Any problems with this board,therefore can cause any or all dispenser switches (with the exception of the handleswitches) to be inoperable. In addition, because the lighted cash credit interface board isconnected in the display circuitry any problems with it can cause problems with theconsolidated display (scrambled display, blenk display, etc.).

The lighted cash credit interface board also contains a four position DIP switch whichmust be set correctly in order for the board to operate properly. This DIP switch must beset as follows:

Switch 1 OPEN or OFFSwitch 2 CLOSED or ONSwitch 3 OPEN or OFFSwitch 4 CLOSED or ON

Figure B-29 shows the lighted cash credit interface board and Figures B-30 through B-32show the pinouts of its connectors.

127


FIGURE B-29. LIGHTED CASH CREDIT INTERFACE BOARD

128


FIGURE B-30. LIGHTED CASH CREDIT INTERFACE BOARD J3 CONNECTOR

129



130



131


B.9. TESTING THE BLEND MOTOR

The blend motor, one for each side of the dispenser, is located in the dispenser junctionbox. Before testing or replacing the blend motor, all probable causes and correctiveactions listed under Fault Code 51 in Section 6 Troubleshooting Guide should be consid-ered. A final test of the blend motor can be performed by measuring the coil resistance asshown in Figure B-33 below. The blend motor consist of two coils, each having a resis-tance of 130 ohms. To measure the coil resistance, disconnect the blend motor connectorplug and use an ohmmeter to measure the resistance across pins 1 & 4 and pins 2 & 3.The readings should be in the range of 127 to 133 ohms. See related blend motor wiringin Appendix C Internal Wiring Diagrams.

Caution: Disconnect dispenser AC power before opening the junction box.

FIGURE B-33. TESTING THE BLEND MOTOR

REAR COIL

FRONT COIL

Y

Y

W

W

1

4

23

CommonV Ω

Ohms

130.0

SG

M-F

H-1

08

WIREPLUG

JUNCTION BOX

BLENDMOTOR

132


133


APPENDIX C

DISPENSER INTERNAL WIRING DIAGRAMS

134


135


FIGURE C-1. DUPLEX II CONNECTOR PINOUTS FOR NON-BLENDERS

Pin 1-Relay Select Nozzle XPin 2-Fast Valve Nozzle XPin 3-Slow Valve Nozzle XPin 4-Relay Select Nozzle YPin 6-Fast Valve Nozzle YPin 7-Pulser Select Nozzle XPin 9-Slow Valve Nozzle YPin 10-Pulser Select Nozzle YPin 12-Fast Valve Nozzle ZPin 13-Pulser Select Nozzle ZPin 14-Relay Select Nozzle ZPin 15-Slow Valve Nozzle Z

J1-S

ide

1 C

onne

ctio

nsJ2

-Sid

e 2

Con

nect

ions

J10-

Sid

e 2

Con

nect

ions

J11

SOLENOID DRIVE BOARD

COMPUTER

JDB

-FH

-223

-A

J9-S

ide

1C

onne

ctio

ns

Pin 1-Nozzle Switch Nozzle XPin 2-Nozzle CommonPin 3-Pulse "B"Pin 4-LED "B"Pin 6-Pulse "A"Pin 7-LED "A"Pin 8-Nozzle Switch Nozzle YPin 9-Nozzle Switch Nozzle Z

Pin 1-Side 1 Nozzle Switch Nozzle AAPin 3-Side 2 Nozzle Switch Nozzle AA

Pin 6-Nozzle Common

Pin 1-Relay Select Nozzle XPin 2-Fast Valve Nozzle XPin 3-Slow Valve Nozzle XPin 4-Relay Select Nozzle YPin 6-Fast Valve Nozzle YPin 7-Pulser Select Nozzle XPin 9-Slow Valve Nozzle YPin 10-Pulser Select Nozzle YPin 12-Fast Valve Nozzle ZPin 13-Pulser Select Nozzle ZPin 14-Relay Select Nozzle ZPin 15-Slow Valve Nozzle Z

J3-S

ide

1C

onne

ctio

ns

Pin 1-Fast Valve Nozzle AAPin 2-Slow Valve Nozzle AA

Pin 3-Relay Select Nozzle AAPin 4-Pulser Select Nozzle AA

J4-S

ide

2C

onne

ctio

ns

Pin 1-Fast Valve Nozzle AAPin 2-Slow Valve Nozzle AA

Pin 3-Relay Select Nozzle AAPin 4-Pulser Select Nozzle AA

Pin 1-Nozzle Switch Nozzle XPin 2-Nozzle CommonPin 3-Pulse "B"Pin 4-LED "B"Pin 6-Pulse "A"Pin 7-LED "A"Pin 8-Nozzle Switch Nozzle YPin 9-Nozzle Switch Nozzle Z

NOTE: Pin connections which are not needed in a particular model of dispenser (for instance, the nozzleZ switch in a V387 dispenser) will have no wire in that location.

136


FIGURE C-2. DUPLEX II CONNECTOR PINOUTS FOR FIXED RATIO BLENDERS

Pin 1-Relay Select Low ProductPin 2-Fast Valve Low ProductPin 3-Slow Valve Low ProductPin 4-Relay Select High ProductPin 6-Fast Valve High Product

Pin 9-Slow Valve High ProductPin 12-Fast Valve Blended ProductPin 15-Slow Valve Blended Product

Pin 7-Pulser Select

J1-S

ide

1 C

onne

ctio

nsJ2

-Sid

e 2

Con

nect

ions

J10-

Sid

e 2

Con

nect

ions

Pin 1-Relay Select Low ProductPin 2-Fast Valve Low ProductPin 3-Slow Valve Low ProductPin 4-Relay Select High ProductPin 6-Fast Valve High Product

Pin 9-Slow Valve High ProductPin 12-Fast Valve Blended ProductPin 15-Slow Valve Blended Product

Pin 7-Pulser Select

J11


COMPUTER

JDB

-FH

-214

-A

Pin 8-Low Product Handle SwitchPin 3-Pulse "B" High ProductPin 6-Pulse "A" High ProductPin 5-Pulse "B" Low ProductPin 9-Pulse "A" Low ProductPin 7-LED "A"Pin 4-LED "B"

J9-S

ide

1C

onne

ctio

ns

Pin 8-Low Product Handle SwitchPin 3-Pulse "B" High ProductPin 6-Pulse "A" High ProductPin 5-Pulse "B" Low ProductPin 9-Pulse "A" Low ProductPin 7-LED "A"Pin 4-LED "B"

Pin 1-Side 1 High Product Handle SwitchPin 2-Side 1 Blend Product Handle SwitchPin 3-Side 2 High Product Handle Switch

Pin 4-Side 2 Blend Product Handle Switch

137


FIGURE C-3. DUPLEX II CONNECTOR PINOUTS FOR PROPORTIONAL BLENDERS

J1-S

ide

1 C

onne

ctio

nsJ2

-Sid

e 2

Con

nect

ions

J10-

Sid

e 2

Con

nect

ions

Pin 1-Relay Select Low ProductPin 2-Fast Valve Low ProductPin 3-Slow Valve Low ProductPin 4-Relay Select High ProductPin 6-Fast Valve High ProductPin 7-Blend Pulser SelectPin 9-Slow Valve High ProductPin 12-Fast Valve Single ProductPin 13-Single Product Pulser SelectPin 14-Relay Select Single ProductPin 15-Slow Valve Single Product


COMPUTER

JDB

-FH

-224

-A

Pin 1-Single Product Handle SwitchPin 8-Blend Handle SwitchPin 3-Pulse "B" High ProductPin 6-Pulse "A" High ProductPin 5-Pulse "B" Low ProductPin 9-Pulse "A" Low ProductPin 7-LED "A"Pin 4-LED "B"

J9-S

ide

1C

onne

ctio

ns

Pin 1-Single Product Handle SwitchPin 8-Blend Handle SwitchPin 3-Pulse "B" High ProductPin 6-Pulse "A" High ProductPin 5-Pulse "B" Low ProductPin 9-Pulse "A" Low ProductPin 7-LED "A"Pin 4-LED "B"

Pin 1-Relay Select Low ProductPin 2-Fast Valve Low ProductPin 3-Slow Valve Low ProductPin 4-Relay Select High ProductPin 6-Fast Valve High ProductPin 7-Blend Pulser SelectPin 9-Slow Valve High ProductPin 12-Fast Valve Single ProductPin 13-Single Product Pulser SelectPin 14-Relay Select Single ProductPin 15-Slow Valve Single Product

138


1-65

60-D

IN

TE

RN

AL

WIR

ING

DIA

GR

AM

- /V

390D

139


3-65

60-D

IN

TE

RN

AL

WIR

ING

DIA

GR

AM

- /V

399D

140


5-65

60-D

IN

TE

RN

AL

WIR

ING

DIA

GR

AM

- /V

490D

141


7-65

60-D

IN

TE

RN

AL

WIR

ING

DIA

GR

AM

- /V

590D

142


9-65

60-D

IN

TE

RN

AL

WIR

ING

DIA

GR

AM

- /V

387D

143


11-6

560-

D I

NT

ER

NA

L W

IRIN

G D

IAG

RA

M -

/V39

0P

144


12-6

560-

D I

NT

ER

NA

L W

IRIN

G D

IAG

RA

M -

/V58

5D

145


13-6

560-

D I

NT

ER

NA

L W

IRIN

G D

IAG

RA

M -

/V39

5D

146


19-6

560-

D I

NT

ER

NA

L W

IRIN

G D

IAG

RA

M -

/V39

0D/J

SIN

GLE

HO

SE

MG

D

147


APPENDIX D

GILBARCO PULSER INTERF ACE PCB TROUBLESHOOTING

148


149


The Pulser Interface PCB board allows our Duplex computer base to recognize Gilbarco nozzleswitches, pulsers, solenoids, and submersible pump relays. The connector/jack assignments onthe board are as follows:

J5 Supplies 170 VDC to Gilbarco I.S. Barrier to operate pulsers.Supplies 5 VDC to one side of nozzle switches.

J3 Provides return path from opposite side of nozzle switches to Duplex computer base.Carries converted pulser signals to Duplex computer base.

J4 Carries solenoid current to side one solenoids via J7.Carries submersible pump current to product relays via J8.

J1 Carries solenoid current to side two solenoids via J7.

The Pulser Interface PCB is located on side one (junction box side) of the dispenser in the DEM.Except for the PCB, the pulser and I.S. Barrier, all electronic troubleshooting procedures will bethe same as for a Wayne Vista dispenser.

Pulser Troubleshooting (Error Code XX-052): First measure the Pulser Power (see Figure D-1) between Orange (+) and Gray (-) at point “B” should read approximately +12 VDC (Thismeasurement must be made with the pulser plugged in). If 12V is not present, check for170VDC between the Orange (+) and Gray (-) wires at point "A". If 170V is not present, replacePulser Interface PCB. If 12V is present in the first step above, the next step is to determine if thepulser is functioning properly. Turn the pulser slowly by hand and measure at point “B” fromGray (-) to Yellow. This measurement should alternate from +12 VDC to 0 VDC as the pulser isslowly turned. Repeat this measurement from Gray (-) to Brown and it should alternate from 0VDC to +12 VDC. If you do not obtain these readings, replace the pulser.

Pulser substitution with another pulser circuit in the same MPD is an acceptable alternative to theabove test procedure.

I.S. Barrier Troubleshooting: The I.S. Barrier is tested by substitution or disconnecting andmeasuring with an ohm meter. Measure from Gray to Gray, Yellow to Yellow, Orange to Orangeand Brown to Brown. You should read 10,000 OHMs + or - 20% in each case. You should readhigh resistance to the Green wire or to the case from all other wires.

FIGURE D-1. PULSER INTERFACE PCB WIRING DIAGRAM

150


FLOWCHART D1. PULSER FAILURE: ERROR CODE XX-05.2

151


USER'S RESPONSE SHEET

Manual Title:

Manual Revision: Date of This Letter:

User's Name: Telephone:

Company: Your Position:

Street Address:

City/State/Zip Code:

How would you rate the quality of this manual:

Excellent Good Fair Poor

AccuracyOrganizationClarityCompletenessOverall DesignLengthIllustrationsExamplesIndexBinding Method

Please list any discrepancy found in this manual by page, paragraph, figure, or table number in the followingspace. If there are any other suggestions that you wish to make, feel free to include them. Thank you.

Location in Manual Comment/Suggestion/Discrepancy

No postage necessary. Detach this form from manual, fold, seal with tape or staple and mail.

Form No. W-2166

917543 Rev A

Service: Vista Blending and Non-blending Suction Pumps and Remote Dispensers

152


TAPE OR STAPLE TO SEAL

FOLD

FOLD

WAYNE DIVISIONDRESSER INDUSTRIES

ATTN: TECHNICAL DOCUMENTATION124 WEST COLLEGE AVENUE • P. O. BOX 1859

SALISBURY, MD 21802-1859

WARRANTY AND LIMITATION OF REMEDY AND LIABILITY

Seller warrants that new products and parts of its own design and manufacture when shipped,will be of good quality and will be free from defects in material and workmanship and willconform to applicable specifications. Work, when performed by Seller, will meet applicablework requirements. No warranty is made with respect to used or rebuilt equipment and withrespect to products not manufactured by Seller, Seller’s only obligation shall be to assign toBuyer, at the time of sale, whatever warranty Seller has received from the manufacturer. Itemssuch as but not limited to lamps, electric motors, hoses, nozzles, hose swivels and safety impactvalves are included in the category referred to in the previous sentence. Seller’s recommenda-tions with respect to the operation of Seller’s equipment are advisory only and are not warranted.All claims under this warranty must be made in writing immediately upon discovery and, in anyevent, within twenty-four (24) months from date of start-up, if a product is involved, or fromcompletion of the applicable work, if work is involved, or thirty (30) months from date of in-voice (whichever shall occur first). (Provided however, that with respect to the Wayne Plussystem, 2400 system, DL series dispensers, and card readers, all claims must be made in writingwithin twelve (12) months from date of start-up. With respect to receipts/totals printers, and anyother printers or printing mechanisms, all claims must be made in writing within ninety (90) daysfrom date of start-up. Wayne Vista dispenser external metal panels will be free from defects dueto rust and/or corrosion for a period of forty-eight (48) months from date of dispenser start-up.)Defective and nonconforming items must be held for Seller’s inspection and returned to theoriginal f.o.b. point upon request. Seller’s warranty on service parts, whether new or recondi-tioned, is ninety (90) days from the date of installation, or twelve (12) months from date ofinvoice, whichever first occurs. THE FOREGOING IS EXPRESSLY IN LIEU OF ALLOTHER WARRANTIES WHATSOEVER, EXPRESSED, IMPLIED AND STATUTORY,INCLUDING WITHOUT LIMITATIONS, THE IMPLIED WARRANTIES OF MERCHANT-ABILITY AND FITNESS.

Upon Buyer’s submission of a claim as provided above and its substantiation, Seller shall, at itsoption either (I) repair or replace its product or work at the original f.o.b. point or location ofpurchase products and/or parts or (II) refund an equitable portion of the purchase price.

THE FOREGOING IS SELLER’S ONLY OBLIGATION AND BUYER’S EXCLUSIVEREMEDY FOR BREACH OF WARRANTY AND, EXCEPT FOR GROSS NEGLIGENCE ORWILLFUL MISCONDUCT, THE FOREGOING IS BUYER’S EXCLUSIVE REMEDYAGAINST SELLER FOR ALL CLAIMS ARISING HEREUNDER OR RELATING HERETOWHETHER SUCH CLAIMS ARE BASED ON BREACH OF CONTRACT, TORT (INCLUD-ING NEGLIGENCE AND STRICT LIABILITY) OR OTHER THEORIES. BUYER’S FAIL-URE TO SUBMIT A CLAIM AS PROVIDED ABOVE SHALL SPECIFICALLY WAIVEALL CLAIMS FOR DAMAGES OR OTHER RELIEF, INCLUDING BUT NOT LIMITED TOCLAIMS BASED ON LATENT DEFECTS. IN NO EVENT SHALL BUYER BE ENTITLEDTO INCIDENTAL OR CONSEQUENTIAL DAMAGES. ANY ACTION BY BUYER ARIS-ING HEREUNDER OR RELATING HERETO, WHETHER BASED ON BREACH OF CON-TRACT, TORT (INCLUDING NEGLIGENCE AND STRICT LIABILITY) OR OTHERTHEORIES, MUST BE COMMENCED WITHIN ONE (1) YEAR AFTER THE CAUSE OFACTION ACCRUES OR IT SHALL BE BARRED.

"NOTE: This equipment has been tested and found to comply with thelimits for a Class A digital device, pursuant to Part 15 of the FCC Rules.These limits are designed to provide reasonable protection againstharmful interference when the equipment is operated in a commercialenvironment. This equipment generates, uses, and can radiate radiofrequency energy and, if not installed and used in accordance with theinstruction manual, may cause harmful interference to radio communi-cations. Operation of this equipment in a residential area is likely tocause harmful interference in which case the user will be required tocorrect the interference at his own expense."

Wayne Division, Dresser Industries Inc., P.O. Box 1859, Salisbury, MD 21802-1859,(410) 546-6600

Part No. 917543 Rev. A 11/92 ©1992 Dresser Industries, Inc. 600/11/92

SERVICE Vista Blending and Non-blending Suction Pumps and … · 2015. 7. 28. · APPENDIX D...

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Transcript of SERVICE Vista Blending and Non-blending Suction Pumps and … · 2015. 7. 28. · APPENDIX D...