AM3 Installation & Operation Manual

AM3 Dishwasher installation and operation manual

Hobart Food Equipment Co., Ltd.

FORM 743423-2E

TABLE OF CONTENTS

GENERAL……………………………………………………………1

INSTALLATION……………………………………………………2

Location……………………………………………………………………………2

Convert from straight-through to corner operation………………………3

Electrical connections……………………………………………………………4

Plumbing connections……………………………………………………………6

OPERATION………………………………………………………7

Controls……………………………………………………………………………7

Preparation…………………………………………………………………………7

Dishwashing………………………………………………………………………8

MAINTENANCE……………………………………………………9

MACHINE CLEANING……………………………………………9

TROUBLESHOOTING……………………………………………10

Appendix 1: Circuit Diagram

Appendix 2: Electrical Wiring Connection Layout

Appendix3: Installation guide

Appendix4: Control board chart

AM3 Dishwasher Installation & Operation Manual

Installation, Operation, and Maintenance of

AM3 DISHWASHERS SAVE THESE INSTRUCTIONS

GENERAL

The AM3 dishwashers are semi-automatic rack-type machines. Three doors open at the same time to allow the rack to be pushed in or out. After filling, an automatic wash and rinse cycle begins when the door is lowered.

Dish table heights may be specified at time of order for 800mm (31.5 inches) or 860mm (33.875 inches).

Electric booster heat options (7kW or 14kW) include an open vented booster tank supplied with a solenoid valve, line strainer, rinse pump and type “A” air gap. Low water protection is provided in the boosters. No booster versions are also available for connection to external heating.

1

AM3 Dishwasher Installation & operation Manual

INSTALLATION Before installing, check the electrical service to be sure it agrees with the electrical specifications on the data plate located on the right side of machines.

Immediately after unpacking, check for possible shipping damage. If the dishwasher is found to be damaged, save the packaging material and contact the carrier or supplier within 15 days of delivery.

LOCATION

Place the dishwasher in its operating location. Before finalizing the location, make sure that consideration has been given for the electrical conduit, water supply, drain connection, gas booster location (if applicable), tabling, chemical feeder replenishment (if applicable), daily cleaning, maintenance and adequate clearance for opening the doors (Fig. 1).

E BETWEEN WALL AND MACHINE IS AT LEAST 100 MM

H TABLE

DRAIN

FILL HOSE

WALL

WALL

THE SPAC

DIS
Fig1
2


The dishwasher must be level before any connections are made. Turn the leveling feet as required to level the machine and adjust to the desired height.

Dish table should be turned down and fitted into the dishwasher (Fig.2). Use a suitable sealer between table and tank lip to prevent leakage.

A hood or vent may be required in order to meet local codes. The ventilation volume should be more than 2.8m3/min t (supplied by others).

TO PREVENTAGE

CONVERT FROM ST

For corner operation, guide on the side and

STRAIGHT-TH

in case of using hood or ven

SEALLEAK

DISH TABLE

Fig. 2

RAIGHT-THROUGH TO CORNER OPERATION

remove the rack guide and baffle (Fig.3) from the front, assemble the rack use screws to re-install the baffle in the front.

ROUGH CORNER

RE-INSTALL BAFFLE HERE

RACK GUIDE

Fig. 3

3


ELECTRICAL CONNECTIONS WARNING：ELECTRICAL AND GROUNDING CONNECTIONS MUST COMPLY WITH

APPLICABLE PORTIONS OF THE NATIONAL ELECTRICAL CODE AND/OR OTHER LOCAL CODES.

WARNING: DISCONNECT THE ELECTRICAL POWER SUPPLY AND PLACE A TAG AT THE DISCONNECT SWITCH INDICATING THAT YOU ARE WORKING ON THE CIRCUIT.

Refer to the electrical diagram on the inside of side panel. Connect the electrical supply wires with different colors to terminal block (Fig. 4).

No Booste

Min. CircuAmpacity / M

Protective De

Volts / Hz / Ph

AMPS 100/50/1 60

100/60/1 60

220/50/1 25

220/60/1 25

240/50/1 25

200/50/3 15

200/60/3 15

220/60/3 15

380/60/3 15

380～415/50/3 15

RPS1

RPS2

DPS1

DPS2

2FU1FU

3FU L1L3N L2

Fig. 4

Electrical Data

r 7KW Electrical Booster

14KW Electrical Booster

it ax. vice

Min. Circuit Ampacity / Max.

Protective Device

Min. Circuit Ampacity / Max.

Protective Device

AMPS AMPS

30 50

30 50

40 60 25 40

25 40

4


CHECK ROTATION (Three-Phase Machines Only) Three phase motors must rotate in the direction of the arrow on the pump housing (counterclockwise). If the rotation is incorrect, DISCONNECT ELECTRICAL POWER SUPPLY and interchange any two of the incoming power supply leads. Re-energize the dishwasher and verify correct rotation.

Warning: The rotation of motors must be checked again before the first operation. In-correct rotation could cause improperly operation of dishwasher and damage of wash pump even in short period of time.

Power Supply for Detergent Dispenser and/or Rinse/Sanitizer Feeder (by others)

Terminals DPS1 and DPS2 in the control box allow connection of a detergent dispenser (by others). RPS1 and RPS2 terminals allow connection of a rinse/sanitizer feeder (by others) with maximum current of 3 Amps (Fig. 4). DPS1-DPS2 is powered during the wash cycle; RPS1-RPS2 is powered during the rinse cycle. Refer to the electrical diagram on the inside of side panel.

Note 1: All connecting wires must accommodate the movement of the control box as it slides out for service.

Note 2：All wires must be 600 volts insulation cable; do not use normal low voltage cable.

Cycle Timing Data

Whole Cycle（s） 60 90 120

Wash（s） 44/47 74/77 104/107

Dwell（s） 4 4 4

Rinse（s） 12/9 12/9 12/9

5


PLUMBING CONNECTIONS WARNING: PLUMBING CONNECTIONS MUST COMPLY WITH APPLICABLE SANITARY, SAFETY, AND PLUMBING CODES.

WATER SUPPLY Connect the water pipe to the incoming water supply (3/4” NPT internal threads)

With 7KW ElecWith 14KW Elec

Note: In caseinstalled (by reducer mus

DRAIN

Connect the 11/4” NPrequired by code, it sminute).

RINSE AGENT CON

Remove front panepoints. Two connprovided. One is locaand allows rinse agAnother is located upump outlet and allopipe. Select a suitarequirement. Use aconnect rinse agent (Fig. 5).

INCOMING WATER SUPPLY REQUIREMENTS TEMPERATURE PRESSURE (Dynamic) 0C 0F KPa kg/cm2

trical Booster 50～60 122～140 29.4～490 0.3～5 trical Booster 10～60 50～140 29.4～490 0.3～5

of line dynamic pressure is less than 0.3kg/cm2，a booster-pump must be others); in case of line static pressure is more than 5kg/cm2，a pressure t be installed (by others).

T drain connector under the wash tank to a suitable drain. If a grease trap is hould have a minimum flow capacity of 95.5 liters per minute (21 gallons per

NECTION

l to locate rinse agent connection ecting points for rinse agent are ted at the upper right side of booster ent to inject into the booster tank. nder the booster tank near the rinse ws rinse agent to inject into the rinse ble point according to the chemical spanner to loosen the plug and pipe with a suitable sealing material

G1/8" INTRERNALTHREADS

G1/8" INTERNALTHREADS

Fig. 5

6


OPERATION

CONTROLS

Power Switch (below )

“Faucet” – power is on

“O” – power is off

Power Indicator (above )

Light on – machine power is on

Light off – machine power is off

Cycle Selector (below )

“I” – 60s wash cycle

“II” – 90s wash cycle

Working Indicator (above )

Light on – machine is working

Light off – wash cycle is finished

Temperature Display the left display indicates wash water temperature

the right display indicates rinse water temperature

Automatic Start closing the doors will automatically start a timed cycle or filling cycle.

Drain lift the standpipe to drain the wash tank

W

R

65

50

4045

5560

7085

70

6065

7580

90I

II O

Recommended Operating Temperatures

ash Water 60 – 65oC（140 – 149oF）

o o
inse Water 8 2 – 90 C（181 – 194 F）
7


PREPARATION

Place the strainer basket in its proper location in the corner of the wash tank and insert the stand drain pipe (Fig. 6)

Close the doors.

Turn the power switch on, the machine will fill automatically.

Open the door and make sure the wash tank is full of water after fill cycle is complete. Scatter the initial amount of detergent on the strainer basket. Replenish as needed. If an automatic detergent dispenser has been installed, follow supplier’s instruction.

Strainer BasketDrain Pipe

Fig. 6

Close the door and the wash and rinse cycle will begin automatically.

Wait for the wash and rinse tank thermometer to reach the proper temperature.

DISHWASHING

Scrape the dishes to remove large particles of food and debris.

Select suitable 60 or 90 second wash cycle according to dish size and food soil.

Stack the dishes in a rack. Do not stack dishes one on top of another as water must have free access to all sides of every dish. Stand plates and dishes up edgewise in a peg-type rack. Cups, glasses and bowls should be inverted in an open-type or compartment type rack (Fig. 7). Silverware and other small pieces may be scattered loosely over the bottom of a flat bottom rack or in a basket type rack.

Fig. 7

After filling a rack, open the doors, slide the rack into the dishwasher, and close the doors. The wash and rinse cycle will begin when the doors are closed.

When the wash and rinse cycle is finished, open the doors and remove the rack of clean dishes. Continue by sliding in the next rack of dishes and close the doors.

If you want to add a dish after the wash cycle has started, before opening the doors, turn off the power switch and wait 10 seconds to allow the wash arm to stop rotation to avoid hot water splashing out on the operators.

8


CLEANING

It is recommended that the machine be thoroughly cleaned at the end of each working shift or at least daily.

The procedures of machine cleaning as follow: 1 Turn of the power switch 2 Open the doors 3 Clean off the dish table into the dishwasher 4 Drain the machine by pulling out the drain stand pipe 5 Remove and empty the strainer basket and pump intake screen. Wash and rinse them

thoroughly. 6 Thoroughly clean and flush the dishwasher interior 7 Replace intake screen and strainer basket 8 Leave the doors open to allow the interior to dry 9 Check the wash and rinse arms rotate freely and are free of any obstructions 10 Check rinse nozzles to make sure they are free of any lime or obstruction

MAINTENANCE

WARNING: DISCONNECT ELECTRICAL POWER SUPPLY AND PLACE A TAG AT THE DISCONNECT SWITCH INDICATING THAT THE CIRCUIT IS BEING WORKED ON BEFORE BEGINNING ANY MAINTENANCE PRECEDURE.

WASHARMS

Upper and lower wash and rinse arms should turn freely and continue turning for a few seconds after being whirled by hand. To check arms, DISCONNECT ELECTRICAL POWER SUPPLY, rotate arms, and remove any obstructions causing improper operation.

Fig.8

Knurled Disk

Rinse Arm

Wash Arm

If the strainer basket or pump intake screen is not properly in place, obstructions (such as food particles or bones) may clog the wash arm nozzles. The wash arms are easily removed for cleaning.

To remove the wash and rinse arms, unscrew the knurled disk between the rinse and wash arms and take them out (Fig. 8).

NOTE: 1 It is not necessary to remove the spacer located on

the lower wash arm shaft. 2 During upper wash and rinse arms removal, be careful not to drop these arms. 3 Upper and lower wash arms and rinse arms are interchangeable.

9


TROUBLESHOOTING This section may help you avoid a service call. However, if a symptom persists after the possible causes have been checked, please contact HOBART local service departments.

SYMPTOM POSSIBLE CAUSES/SUGGESTED ACTIONS

No machine operation

1 Open doors and hold for 2 seconds, close it again 2 Blown fuse or tripped circuit breaker at power supply 3 Blown fuse FU3 at control circuit

Long wash cycle

1 Water temperature in booster is too low, fill water temperature is too low.

2 Water in booster is below high level sensor; please examine line strainer and solenoid valve.

Dishes not clean

1 Wash pump rotating in wrong direction. 2 Insufficient wash water due to drain obstruction preventing proper

drain closing. 3 Insufficient water circulation due to obstruction at pump intake screen.

Disconnect power supply, drain wash tank and check. 4 Incorrect water temperature. Insufficient warm-up time. Check circuit

breaker, thermostat and heater. 5 Incorrect detergent dispensing. Contact your detergent

representative. 6 Excessive mineral deposits through wash and rinse system. Deliming

may be necessary.

Spotting silverware, glasses, and dishes

1 Improperly loaded racks. 2 Incorrect rinse water temperature. 3 Loss of water pressure due to pump obstruction. 4 Excessively hardness of water. 5 Incorrect detergent for water type. 6 Incorrect rinse additive for water type. 7 Incorrect concentration of detergent, rinse additive and/or sanitizer.

Inadequate rinse

1 Dirty line strainer causing reduced water flow. Turn off water supply, disconnect water supply pipe and solenoid valve, withdraw and clean screen. Reassemble.

Leaking valve

1 Foreign material preventing proper valve operation. Note: a critical period is soon after installation when pipe compound or metal shavings may lodge at the valve seat. Shut off supply line. Unscrew and lift bonnet from valve body. Clean valve and reassemble

2 If a solenoid valve is malfunctioning, it is recommended that you contact Service

No or slow fill

1 Dirty line strainer causing reduced water flow. Turn off water supply, disconnect water supply pipe and solenoid valve, withdraw and clean screen. Reassemble

2 Low supply line pressure

10


11

SERVICE Contact your local Hobart-authorized service office for any repairs or adjustments needed on this equipment.

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AM3 Installation & Operation Manual

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Transcript of AM3 Installation & Operation Manual