YS MILLENIUM

32
GB YORK INTERNATIONAL ;5 MILLENNIUM CONTROL CENTER OPERATION 035L02377-GB0 Effective from 01/98 STYLE C REFRIGERANTS : R22, R134a ROTARY SCREW LIQUID CHILLERS MILLENNIUM TM

Transcript of YS MILLENIUM

Page 1: YS MILLENIUM

�������������������

��

������� ������ ����

��������

������������

Effective from 01/98

��� �

������������ ����� �����

������ ���� ����� � ���

������������

Page 2: YS MILLENIUM

2

035L02377-GB0

TABLE OF CONTENTS

Section Page Section Page

1. Introduction & Physical Description

1.1 General

��� �������������������

1.3 System Components

2. Basic Operation

2.1 Startup

��� ����������������� �!������

��" ���� �#�

3. Display Keys

3.1 General

3.2 Display Key Messages

4. Entry Keys

4.1 General

$�� %�����������

5. Setpoints Keys

5.1 General

5.2 Setpoints Key Messages

6. Service Keys

6.1 General

&�� ��� ��'��(��%���

&�" )�������������%��

&�$ *��+����*����%��

&�, -�������.�����%��

7. Mode Keys & Compressor Switch

7.1 Program Mode

7.2 Operating Modes

7.3 Compressor Switch

8. Programming the Control Center

/�� �������

/�� !����� ��0�� ����+�����������+�����

/�" !���������������+����

/�$ .���1 �#��*���� ����+����

/�, ���������!���2��������

/�& *������+������������ ���

/�3 -��� ���*������� ���

/�/ ����������������+�������������

/�4 *���������������+

9. Status Key and Status Displays

4�� �������

4�� ������������������5�������

4�" �����������)�������5�������

4�$ ���� �#���������5�������

4�, ������+6��� �#���������5�������

10. Micro Board Program Jumpers

3

4

4

9

9

10

11

11

13

13

14

14

16

16

17

17

17

18

18

19

20

20

21

21

21

21

22

22

22

23

23

24

25

27

28

ii

Page 3: YS MILLENIUM

3

035L02377-GB0

1.1 GENERAL

The York Millennium Control Center is a microprocessorbased control system for the YS range of screwcompressor liquid chillers. The primary function of thecontrol system is to adjust compressor slide valveposition to controls the leaving chilled liquid temperature.The control system can also use slide valve control tolimit drive motor current if required.

User interface is via a colour coded keypad and a 40character alphanumeric display allowing access tooperating and programmed data. Information can bedisplayed in Metric or Imperial units. For clarity thismanual uses Metric units only. Conversion tables areprovided at the back of this manual. The followinginformation can be accessed via the display :

• Chilled liquid temperatures – leaving and return• Condenser liquid temperatures – leaving and return

(customer option; field installed)• Refrigerant pressures – evaporator and condenser• Saturation temperatures - evaporator and condenser• Compressor discharge temperature• Oil temperature• Oil pressure –

• Input to compressor• Input to oil filter

1. INTRODUCTION & PHYSICAL DESCRIPTION

• Oil filter differential• Differential oil (oil pressure – evap pressure)

• 3-phase motor current & 3-phase power line voltage(with solid state starter only)

• Fault history data• Motor current in % of full load amps• Slide valve position in % of maximum travel• Operating hours and compressor starts counter

The system setpoints are operator entered via thekeypad. These setpoints can also be displayed on the40 character display. The system setpoints are:

• Leaving chilled liquid temperature• % Current limit• Chiller full load amps (with solid state starter only)• Pull-down demand limit• Clock (day, time, calendar date)• Daily schedule (7 day time-clock programming)

with provision for special holiday schedule• Remote leaving chilled water temperature reset range• Data logger – auto interval and start time

The cause of all system shutdowns (safety or cycling) ispreserved (until the system is reset or restarts) in theon board memory for subsequent viewing on the keypaddisplay. The operator is continually advised of systemoperating conditions by various background and warning

1.

Page 4: YS MILLENIUM

4

035L02377-GB0

messages. The keypad contains special service keysfor use by the service technician when performing systemtroubleshooting.

External interface is available for control of the chillervia a York ISN system. In addition, customer connectionsare provided for remote control of the following controlsystem functions:

� Remote Start� Remote Stop� Remote LCWT Setpoint

(Pulse Width Modulated signal)� Remote Current Limit Setpoint

(Pulse Width Modulated signal)� A “Remote Mode Ready to Start” Status Contacts� Safety Shutdown Status Contacts� Cycling Shutdown Status Contacts

In addition to the standard remote control features, anoptional card file with plug-in interface cards is available.These cards allow remote chilled liquid temperaturesetpoint offset and/or remote current limit setpointinterface using 4-20mA, 0-10 VDC, or contact closuresignals rather than pulse width modulated signals.

A main switch is provided to locally start or stop thechiller and to reset the control system after a manualreset shutdown by the safety controls.

1.2 SYSTEM ARCHITECTURE

The Micro Board contains the microprocessor andsupporting digital logic and analog circuits. All systemoperating decisions are made on this board; such aswhen to open or close the slide valve, when to operatethe oil line solenoid, when to shutdown on safetyshutdowns, etc. All inputs and outputs connected to theMicro Board operate on +5VDC. The 115VAC input andoutput signals are connected to the Micro Board via theDigital Input Board and the Relay Output Boardrespectively

System pressures and temperatures are sensed bytransducers and thermistors respectively. The transducerand thermistor inputs are connected directly to the MicroBoard and are multiplexed to allow sharing of a singleanalog to digital converter. The input values arecompared to stored safety threshold values and, ifexceeded, the Micro Board initiates a chiller shutdown.

The Digital Input Board accepts 115VAC inputs fromsystem relays and external devices such as chilled waterpump interlocks, local/remote cycling devices, EMS,separator oil level switch, etc. These 0/115VAC input

signals are converted to 0/+5VDC logic level signals foruse by the Micro Board. The output of the Digital InputBoard is interfaced directly to the Micro Board.

The Relay Output Board interfaces the Micro Boardoutputs with the rest of the system. The logic leveloutputs of the Micro Board energize or de-energize DCrelays on the relay output board. The contacts of theserelays energize or de-energize the system 115VACsolenoids and relays. The remote status customercontacts are also located on this board.

The Power Supply Board supplies DC power to allcircuit boards. AC power arrives at the power supplyboard via a 115VAC to 24VAC step-down transformer.

The Compressor Motor Starter |nterface circuits aremounted on an auxiliary internal panel in front of theMicro Board and allow the Center to monitor and controlmotor current as well as to monitor any starter faults.Two systems are available for connection: a StarterLogic Board for connection to the YORK Solid StateStarter or a CM-2 Starter Module for connection to aRemote Electro-Mechanical Starter.

The Starter Logic Board performs compressor motoroverload and power fault protection in addition to solidstate starter control functions. The logic board alsoprovides 3 phase power line voltage and compressormotor current values to the Micro Board for low linevoltage and current imbalance protection and front paneldisplay.

The CM-2 module performs compressor motor overloadand power fault protection. The module also providesmotor current values to the Micro Board, which can bedisplayed as percentage of full load current.

1.3 SYSTEM COMPONENTS

MICRO BOARD

The Micro Board contains the microprocessor, externalRAM for scratchpad memory, and an external EPROMstoring the operating program. Operator entered systemsetpoints are stored in RAM in the Real Time Clock(RTC) chip where it is battery backed up. The RTC alsostores and updates the time-of-day, day-of-week, andcalendar date.

System analog parameters (Pressures, Temperatures,and Motor Current) are input to the multiplexer (MUX)circuit then transmitted serially to the analog to digitalconverter where they are converted to digital signals.The Micro Board compares these values to stored safetythresholds and initiates a chiller shutdown if thresholds

1.

Page 5: YS MILLENIUM

5

035L02377-GB0

are exceeded. These parameters can be viewed on thedisplay if requested by the operator, transmitted via theRS-232 serial port to printer, or transmitted via RS-485serial port to a YORK energy management system. TheMicro Board also uses these parameters for leavingchilled water temperature control, current limit controland high/low pressure limit control via slide valvemovement.

An undervoltage detection circuit monitors the + 5VDCunregulated input from the power supply and comparesthis to a reference voltage. If the input voltage dropsbelow the reference voltage threshold, the Micro Boardinitiates a chiller shutdown. The Micro Board will preventa chiller restar t until the operator moves theCOMPRESSOR switch to the STOP-RESET positionand then to the START position.

A watchdog circuit ensures that the complete programis executed every program cycle, preventing the programfrom looping in a subroutine and ignoring critical chiller

parameters. During each program cycle (approx. 100ms)a pulse is sent to the watchdog circuit starting a 2-secondtimer. If the watchdog circuit does not receive anotherpulse before the 2 seconds have elapsed a reset pulseis sent to the Micro Board. The Micro Board will thenshut down the chiller, reinitialize the program andautomatically restart the chiller.

The Real Time Clock (RTC) chip stores and updatesthe time-of-day, day-of-week and calendar date. Anytime the chiller shuts down on a safety or cyclingshutdown, the “Day” and “Time” of shutdown is displayedalong with the cause of shutdown. This “Time”information is also used to determine correct chiller startand stop times when the user programmable scheduleris used to automatically start and stop the chiller. TheRTC chip contains a non-replaceable battery whichpowers the RTC RAM in the event of an AC power failure.All of the keypad programmable setpoints are stored inthe RTC RAM. The life of this battery is 5-10 years.During each program cycle, the condition of the battery

DigitalInputBoard

RelayOutputBoard

Micro Board

PowerSupplyBoard

Fuses

Transformer

Card File & EMS/BAS Interface Cards (Optional)

Customer Connection Terminal Blocks

PANEL LAYOUT

1.

Page 6: YS MILLENIUM

6

035L02377-GB0

is monitored and if a low battery condition is detected awarning is displayed that the chip must be replaced.

POWER SUPPLY BOARD

The power supply board provides the necessaryoperating voltages for all the circuit boards in theMicrocomputer Control Center. Two switching regulatorssupply +12VDC and +10VDC to the Relay Output Boardand Micro Board respectively. The 10VDC output isfurther regulated to + 5VDC for use by the vacuumfluorescent display. A voltage regulator supplies +24VDC to the optional card file for use by the remoteLCWT setpoint card and remote current limit setpointcard.

The power supply board also contains a Display ResetCircuit which outputs a reset signal to the VacuumFluorescent Display during low voltage conditions,preventing “Latch-up” conditions. This causes the displayto go blank whenever the +5VDC regulated power supplyoutput to the display drops below +4.7VDC.

A step-down transformer (external to the power supplyboard) provides 24VAC to a bridge rectifier, theunregulated output (approx. 30VDC) of which is suppliedto the Solid State Starter logic board or CM-2 module.These boards have their own on-board power supplieswhich supply the required voltages for these boards.

MICRO BOARD LAYOUT

Real TimeClock (RTC)Chip

EPROM

RS-232Connection

RS-485Connection

1.

Page 7: YS MILLENIUM

7

035L02377-GB0

RELAY OUTPUT BOARD

The Relay Output Board allows the Micro Board to beinterfaced to 115VAC output signals. The ten board-

KEYPAD & DISPLAY

The Control Center front panel layout consists of a 40character display, a number of groups of keys and arotary compressor switch as follows :

DIGITAL INPUT BOARD

The Digital Input Board converts 115VAC signals to+5VDC logic level signals for use by the Micro Board.

When a digital input device closes, the 115VAC input isapplied to a full wave rectifier. This unfiltered DC signalis then applied to an opto-coupler which switches on toallow + 5VDC to be dropped across the output resistor.

A customer connection terminal strip on the Digital InputBoard is used interfacing external signals (remotestop/start, remote cycling devices, etc.). The terminalsare grouped together (according to function) with a115VAC power source (terminal 1). The power sourcesupplies voltage for externally located relay contacts,such as the flow switch which, when its contacts close,apply 115VAC to the revelent input terminal causing theDigital Input Board output to transition from OVDC to +5VDC. The output will remain at + 5VDC as long as theflow switch is closed. For each terminal group, a 115VACinput signal causes a + 5VDC output level on thecorresponding board output. A OVAC input causes aOVDC output. All outputs interface to the micro boardvia ribbon cable.

KEYPAD AND DISPLAY LAYOUT

(Display)

mounted relays each have one side of their relay coilconnected to +12VDC regulated power supply. The otherside of each coil is connected to the Micro Board whichdrives the appropriate connection to ground potentialwhen it wants to energize a selected relay. A +12VDClevel causes the output relay to de-energize. The normallyopen relay contacts are interfaced, via internal andcustomer terminal blocks to various external relays andsolenoids.

The internal connections are used for controlling thesystem start relay, system stop relay, some systemsafeties, system solenoids and the slide valve. The watertemperature control circuits that control the slide valveare located on the Micro Board. These circuits controltwo triacs located on the relay output board; one to loadthe slide valve and one to unload the slide valve. Thetriacs are then interfaced to the load and unload slidevalve solenoids.

The external customer connections are used for fieldinterface of system status contact closures, and chilledwater pump contacts.

1.

Page 8: YS MILLENIUM

8

035L02377-GB0

SOLID STATE STARTER LOGIC BOARD

If the Microcomputer Control Center is to be used with asolid state starter, a Solid State Starter Logic Board isfitted, mounted on a hinged panel inside the ControlCenter. This module provides compressor motor currentOverload and Power Fault protection as well as 3-phasecurrent and voltage information to the Micro Board.

CM-2 CURRENT MODULE

If the Microcomputer Control Center is to be used withan electromechanical starter, a CM-2 current module isfitted, mounted on a hinged panel inside the ControlCenter. This module provides compressor motor currentOverload and Power Fault protection. The 100% FLAmotor current signal is calibrated on this board andmultiplexed to the Micro Board for use in current limitcontrol and display purposes.

Three CT’s mounted in the motor terminal box provide 3phase motor current signals to a diode bridge mountedon the hinged panel adjacent to the CM-2 module. Thebridge rectifies the signal and applies it to two parallelvariable resistors, also mounted on the hinged panel.The resistors are adjusted to provide a 1VDC signal tothe CM-2 module when the compressor motor is at 100%FLA. On the CM-2 module, this signal is applied to apower fault detector circuit.

STARTER INTERFACE PANELS

Solid State Starter Logic Board

CM-2 Current Module

Diode Bridge Variable Resistors

Display - The 40 character, vacuum fluorescent, dotmatrix display is used to view all messages, parameters,set points, and data.

Status Key - This key is used to access backgroundstatus, warning and fault messages about the chiller.

Display Keys - These keys provide a direct read out ofeach monitored parameter on the alphanumeric display.

Entry Keys - These keys are used to enter the valuesfor the operator programmed setpoints.

Setpoints Keys - These keys are used to view eachsetpoint, in any MODE, or to select the individualsetpoints that are programmed by the operator inProgram MODE.

Service Keys - These keys are provided for use in someservice operations and for trouble shooting by qualifiedservice personnel.

Access Code / Program / Mode Keys - These keysallow access to program the Control Center Setpointsand the control system operating modes.

Compressor Switch - This 3-position rotary switch isused to start (except in remote mode), stop and resetthe system.

1.

Page 9: YS MILLENIUM

9

035L02377-GB0

2. BASIC OPERATION

2.1 STARTUP

The chiller is permitted to start only if there are no Safetyor Cycling shutdown conditions in effect and the slidevalve position is less than 10 % open (30% if hot gasbypass is fitted - program jumper JP4 removed). Whenthese conditions are met the following message isdisplayed on the 40 character display at the keypad:

When the compressor switch is moved to the “Start”position, a 30 second start sequence is initiated and thefollowing is displayed :

The oil line solenoid valve (S0-S3 chillers only) isenergized (opened) for 15 seconds then closed. Alsofor the first 15 second period, a pressure transducerauto-zeroing sequence is performed. The output of theoil pressure transducer is compared to the output of theevaporator transducer. In an equalised system thesetransducers are sensing the same pressure and shouldgive the same reading. The Control Center identifies anydifference between the measurements and adds orsubtracts this, as required, from the differential valuewhile the system is running. This same auto-zeroing isperformed between the oil pressure transducer and thefilter oil pressure transducer.

After 25 seconds monitoring of the chilled liquid flowswitch flow switch begins.

At the completion of the 30 second start sequence, theoil line solenoid valve (S0-S3 chillers only) is energized,the start signal is sent to the motor starter, and thefollowing message is displayed :

At this time, to ensure development of oil pressure, acontinuous load signal is applied to the slide valve untilit achieves a position of 25%. For the first 3 minutes ofrunning this slide valve position is maintained by applyinga load signal if the valve position drops to 22% until athe 25% position is again reached. Only Current Limitfunction, Low and High Pressure Limit functions andmanual slide valve operation in Service Mode can causethe slide valve to drop below 22% during the first 3minutes of chiller operation.

After 3 minutes a programmable pull-down demandfunction is available to allow the maximum motor currentto be limited for a specific period from compressorstartup. When programmed, this limit takes priority overthe Current Limit Setpoint, allowing different settings toapply to pull-down and to normal running.

2.2 NORMAL RUNNING AND CYCLING

After the chiller has been running for 3 minutes, andproviding all operating parameters are withinprogrammed limits the following message is displayed:

As required, a 1 second load or unload signal is appliedat 10 second intervals to maintain the leaving chilledwater temperature to the programmed setpoint.

Each chiller is fitted with a solenoid valve in parallel withthe main fixed refrigerant flow control orifice. Thissolenoid valve is used to create a variable orifice whichis opened and closed while the chiller is running in orderof the following priorities : a) If discharge superheat fallsbelow 8.3°C (R22), 5.5°C (R134a) the solenoid valve isclosed until the superheat rises to more than 11.1°C (R22),8.3°C (R134a). b) If evaporator pressure falls below apreprogrammed limit the solenoid valve opens until thepressure rises by approximately 80kPa. c) If the differentialbetween condenser pressure and evaporator pressure fallsbelow a preprogrammed setpoint, the solenoid valve isopened until the differential rises to more than 690kPaabove setpoint.

If the chiller is fitted with hot-gas bypass unloading, afterthe chiller has been running 3 minutes, the hot gas valveis opened and closed based on the difference betweenthe entering chilled liquid temperature and the leavingchilled liquid temperature setpoint. The differential atwhich it is opened and closed is determined bypreprogrammed setpoints within the range of 0.5°C to5.5°C opening and 1.1°C to 8.3°C closing.

The chiller can operate in three cooling modes: watercooling, glycol (brine) cooling and ice storage. Thesemodes operate as follows :

Water Cooling ModeIn this mode the leaving chilled liquid temperaturesetpoint can be programmed within the range 3.3°C to21.1°C. If the leaving chilled liquid temperature falls morethan 2.2°C below the setpoint, a cycling shutdown isinitiated and the following message is displayed:

The chiller automatically restarts when the temperaturerises to a programmable value between 0°C and 5.5°Cabove the setpoint.

If the setpoint is increased with the chiller running, theshutdown threshold becomes 3.3°C for 10 minutes. Thisprevents shut down when the setpoint is increased.

DAY-TIME - LOW WATER TEMPERATURE - AUTOSTART

SYSTEM RUN - LEAVING TEMP. CONTROL

SYSTEM RUN

SYSTEM START SEQUENCE INITIATED

SYSTEM READY TO START

2.

Page 10: YS MILLENIUM

10

035L02377-GB0

Glycol Cooling ModeOperation in glycol cooling mode is similar to that inwater cooling mode except that the leaving chilled liquidtemperature setpoint is programmable in the range-6.7°C to 21.1°C. If the setpoint is increased with thechiller running in glycol mode, the shutdown thresholdremains at its previous programmed value for the next10 minutes.

Ice Storage ModeIce storage mode is an operating mode within the glycolcooling mode which allows the chiller to make ice at thefastest possible rate by inhibiting unload outputs to theslide valve. This causes the chiller to load until it shutsdown on low leaving temperature at 2.2°C below thesetpoint. No unload outputs are applied to the slide valveunless the motor current exceeds the programmedcurrent limit setpoint threshold.

In ice storage mode, ice storage operation isautomatically selected when the leaving chilled liquidtemperature setpoint of 0°C or lower is programmed.Normal glycol cooling operation will resume when asetpoint of more than 0°C is programmed. The chillercan be switched between the two modes locally, orremotely by use of the leaving chilled liquid temperaturesetpoint offset function.

2.3 SHUTDOWN

If the chiller shuts down on a cycling shutdown, it willautomatically restart when the condition that caused theshutdown no longer exists. Safety shutdowns requirethe operator to perform a manual reset at the keypadbefore restart is allowed. The event that caused theshutdown is either displayed automatically or can beviewed when the STATUS key is pressed.

Any time the chiller shuts down, for any reason, it cannotbe restarted for 2 minutes. During this period the followingmessage is displayed:

The chiller can be shutdown manually at any time byturning the compressor switch to the STOP position.

OVERALL START-UP AND SHUTDOWN SEQUENCE

The temperature offset above setpoint at which the chillerwill automatically restar t can be independentlyprogrammed between 0°C and 5.5°C for both glycol andice storage modes.

2.0 MIN LOCKOUT DELAY

2.

Page 11: YS MILLENIUM

11

035L02377-GB0

3. DISPLAY KEYS

3.1 GENERAL

The Display keys give direct access to commonlyrequired data about the operation of the chiller. This isparticularly useful during commissioning, monitoring ofthe operation of the chiller, and for trouble shooting. TheDisplay keys are operated as follows :

• Press and release the appropriate key – the messagewill be displayed for 2 seconds.

• Press and hold the appropriate key – the messagewill be displayed and updated every 0.5 seconds untilthe key is released.

• Press and release appropriate key, then press andrelease the Display Hold key in the Entry Keys sec-tion of the keypad– the message will be displayed andupdated every 2 seconds until the Display Hold key isagain pressed and released, or 10 minutes haveelapsed, whichever comes first. An indicator light inthe corner of the Display Hold key shows when thefunction is operating.

3.2 DISPLAY KEY MESSAGES

Below, examples are given of the messages displayedwhen each of the nine Display Keys are pressed. In each

Chilled Liquid Temps KeyWhen the Chilled Liquid Temps key is pressed leavingand returning chilled liquid temperatures are displayedas follows :

Display limits are:Leaving : minimum -17.8°C

maximum 27.3°CReturn : minimum -17.7°C

maximum 33.9°C

Refrigerant Pressures KeyWhen the Refrigerant Pressures key is pressedevaporator and condenser refrigerant pressure aredisplayed as follows :

Display limits are:Evaporator : minimum 340 kPa

maximum 888 kPaCondenser : minimum 407 kPa

maximum 2172 kPa

of the example displays X’s are used to represent thenumeric value being displayed. If X’s actually appear onthe display it means the measured or calculated valueis outside the display limits for that parameter.

EVAP = 428 KPA, COND = 1455 KPA

CHILLED LEAVING = XX.X 0C, RETURN = XX.X 0C

3.

Page 12: YS MILLENIUM

12

035L02377-GB0

Oil / Filter Pressures KeyWhen the Oil / Filter Pressures key is pressed overalloil differential pressure and oil filter differential pressureare displayed as follows :

Overall oil differential pressure is taken as the oil pressureat the input to the compressor less the evaporatorpressure.

Differential filter pressure is taken as the oil pressure atthe inlet to the oil filter less the oil pressure at the inletto the compressor.

Display limits are:Both Values : minimum 407 kPa

maximum 2172 kPa

Options KeyThis key is not used.

SSS Motor Current / Volts KeyFor chillers fitted with a York Solid State Starter, this keycan be pressed to display 3-phase compressor motorcurrent and 3-phase solid state starter input line voltage.The information is presented as two separate messageswhich are displayed alternately when the key is pressedcontinuously. Alternatively, if the Display Hold Key isused, the messages will be swapped each time theSSS Motor Current / Volts Key is pressed. The messagesare as follows :

If the chiller is not fitted with a York Solid State Starter,the following message is displayed when this key ispressed :

Condenser Liquid Temps KeyIf the optional condenser water temperature sensors arefitted, when the Condenser Liquid Temps key is pressedleaving and returning condenser water temperatures aredisplayed as follows :

If the condenser water temperature sensors are notfitted, or both values are out of range, the display will goblank when this key is pressed.

Display limits are:Both Values : minimum -13.1°C

maximum 45.8°C

Print KeyIf an optional printer is connected, this key is used toinitiate a print of operating data. If the compressor switchis in the RUN position and the compressor is running,the time, date and system operating and setpoint datawill be printed for the instant the Print key is pressed. Ifthe compressor is not running the time, date and datawill be for the last time the compressor was running. Ifthe compressor switch is in the STOP position, printoutis inhibited.

When the Print key is pressed the following message isdisplayed :

If a printer is not connected, further presses of the keywill make no change to the message.

% Motor Amps / % Slide Valve KeyWhen the %Motor Amps / % Slide Valve key is pressedMotor Current as a percentage of full load current andSlide Valve Position as a percentage of fully loaded aredisplayed as follows:

The motor current displayed is the highest of the threeline currents.

Operating Hours / Starts Counter KeyWhen the Operating Hours / Start Counter key is pressedtotal operating hours and total number of compressorstarts is displayed as follows:

Display limits are:Both Values : maximum 65535(counter resets when maximum is reached)

DIFF OIL = XXX KPA; DIFF FLTR = XXX KPA

COND LEAVING = XX.X 0C, RETURN = XX.X 0C

SOLID STATE STARTER NOT INSTALLED

V A-B = XXXX; V B-C = XXXX; V C-A = XXXX

A AMPS = XXXX; B AMPS = XXXX; C AMPS = XXXX

PRINT ENABLE

START COUNTER = XXXX

ACCUMULATED RUN TIME = XXXX HOURS;

MOTOR CURRENT = XXX %FLA; SLIDE VALVE = % XXX

3.

Page 13: YS MILLENIUM

13

035L02377-GB0

4. ENTRY KEYS

4.1 GENERAL

The Entry keys allow the user to change numerical valuesprogrammed in as chiller setpoints, cutouts, clock, etc.

4.2 KEY FUNCTIONS

Numeric KeysThe Numerical keypad provides number keys plus anasterisk key to designate holidays when programmingDaily Schedule holiday days.

AM / PM KeyThe AM / PM key allows the user to change AM / PMwhile programming the time and date. This key is alsoused when setting the stop start timers for the DailySchedule / Holiday feature.

Enter KeyThe Enter key must be pushed after any change is madeto setpoints, cutouts, or system clock. Pressing this keytells the micro to accept new values into memory. If thisis not done, the new values entered will be lost and theoriginal values will be returned.

The Enter key is also used to scroll through availabledata when using the Program, Operating Data, History,or Set Schedule/Holiday keys.

Cancel KeyThe Cancel key is used during programming forcorrecting errors or returning to preprogrammed defaultvalues. Generally when the Cancel key is pressed, thecursor returns to the first programmable character inthe display message, allowing the operator to beginreprogramming. Any values already keyed in will beerased and the original or default values will appear. Inother instances the display will remain the same andthe only reaction will be the cursor returning to the firstcharacter.

Display Hold KeyThe Display Hold key can be used to maintain individualmessages on the display. The display will be updatedevery 2 seconds until the Display Hold key is againpressed and released or 10 minutes have elapsed,whichever comes first. An indicator light in the corner ofthe Display Hold key shows when the function isoperating.

Advance Day / ScrollThe Advance Day key is used to select the correct dayof the week when programming the Time, Date, andDaily Schedule and also to scroll through availableoptions when programming the chiller operating modes.

4.

Page 14: YS MILLENIUM

14

035L02377-GB0

5. SETPOINTS KEYS

5.1 GENERAL

The Setpoints keys are used to access the operatingsetup of the chiller. The keys can be used by themselvesto view the current setting for each item, or they can beused in conjunction with the Entry keys and the AccessCode / Program keys to change the programmedsettings. This allows access for changing the chiller setupto be limited to authorised personnel only.

This section describes the use of the Setpoints keys toview the programmed settings. See Sections 4, 7 and 8for use of Entry keys, Access Code / Program keys andSetpoints keys to change the settings.

The Setpoints keys are operated as follows :

• Press and release the appropriate key – the messagewill be displayed for 2 seconds.

• Press and hold the appropriate key – the messagewill be displayed and updated every 0.5 seconds untilthe key is released.

• Press and release appropriate key, then press andrelease the Display Hold key in the Entry Keys sec-tion of the keypad– the message will be displayed andupdated every 2 seconds until the Display Hold key isagain pressed and released or 10 minutes have

elapsed, whichever comes first. An indicator light inthe corner of the Display Hold key shows when thefunction is operating.

5.2 SETPOINTS KEY MESSAGES

Below, examples are given of the messages displayedwhen each of the eight Setpoints keys are pressed. Ineach of the example displays X’s are used to representthe numeric value being displayed. If X’s actually appearon the display it means the measured or calculated valueis outside the display limits for that parameter.

Chilled Liquid Temps KeyWhen the Chilled Liquid Temps key is pressed the currentoperating value of the leaving chilled liquid temperaturesetpoint, is displayed. Also displayed is the differentialabove the setpoint at which the chiller will restart after acycling shutdown on low leaving temperature.

In water or glycol cooling modes the displayed messageis as follows :

In ice storage mode the displayed message is as follows:

LEAVING SETP = XX.X 0C RESTART = +XX 0C

ICE LEAVING SETP = -XX.X 0C RESTART = +XX 0C

5.

Page 15: YS MILLENIUM

15

035L02377-GB0

In Local operating mode the display shows the locallyprogrammed setpoint. In Remote operating mode thedisplay shows the setpoint set by the BAS/EMS systemattached to the chiller.

% Current Limit KeyWhen the %Current Limit key is pressed the programmedvalue for maximum allowable running current is displayedas a percentage of full load current, and the value of themotor full load current in Amps as follows :

If a York Solid State Starter is not fitted, only the currentlimit value is given as follows:

Pull Down Demand KeyWhen the Pull Down Demand key is pressed three valuesare displayed: the programmed time in minutes fromstartup that the pull down limit is applied for; theprogrammed maximum allowable running current as apercentage of full load current during this time; and theremaining time before the limit is removed. The valuesare displayed as follows :

Clock KeyWhen the Clock key is pressed the current day-of-the-week, time-of-day and calendar date (Month-Day-Year)are displayed as follows :

If the clock is not programmed the display reads :

Daily Schedule KeyWhen the Daily Schedule key is pressed, and held, theprogrammed daily start and stop times for the chillerand the programmed holiday day start and stop timesare displayed in sequence as follows :

Holiday KeyWhen the Holiday key is pressed the days of the weekprogrammed to use the Holiday start and stop times,rather than the standard start and stop times, aredisplayed as follows :

Holiday days indicated apply to the current week onlyand are cancelled at the end of the week.

Remote Reset Temp Range KeyWhen the Remote Reset Temp Range key is pressedthe programmed maximum allowable value for remoteoffset of the chilled liquid leaving temperature setpointis displayed as follows :

Data Logger KeyWhen the Data Logger key is pressed, the target printerdesignation, data logging start time, data logging interval,and remaining time until next data log are displayed asfollows :

CURRENT LIMIT = XXX %FLA; MTR CUR = 000 FLA

SETPOINT = XXX MIN @ XX %FLA XXX MIN LEFT

CURRENT LIMIT = XXX %FLA

TUESDAY 10 : 35 AM 8 / 22 / 98

S_ M* T* W_ T_ F_ S_ HOLIDAY NOTED BY *

REMOTE RESET TEMP RANGE = XX 0C

WTO - STRT = 5 : 00 AM INT = 3.0 HRS. 1.5 HRS. LFT

SUN START = 08 : 30 AM STOP = 04 : 30 PM

SUNDAY 12 : 00 AM 1 / 1/ 90

MON START = 05 : 00 AM STOP = 07 : 00 PM

FRI START = 05 : 00 AM STOP = 04 : 30 PM

TUE START = 05 : 00 AM STOP = 07 : 00 PM

WED START = 05 : 00 AM STOP = 07 : 00 PM

THU START = 05 : 00 AM STOP = 07 : 00 PM

SAT START = 05 : 00 AM STOP = 04 : 30 PM

HOL START = 11 : 00 AM STOP = 03 : 00 PM

If the Daily Schedule key is pressed and released thenthe Display Hold key is pressed and released the displayswill scroll continuously until the Display Hold is pressedagain or 10 minutes has elapsed, whichever is sooner.

5.

Page 16: YS MILLENIUM

16

035L02377-GB0

6. SERVICE KEYS

6.1 GENERAL

The Service keys are provided to assist in routinemaintenance or when troubleshooting the system. TheSlide Valve keys and Warning Reset key can only beused in Service Operating Mode (see Section 8). TheDisplay Data and History Print keys can be used in alloperating modes.

6.2 SLIDE VALVE KEYS

Load KeyPress and release this key to load the compressor slidevalve. The following messages are displayed if the chilleris running or not running, respectively :

The compressor slide valve will continue to load untilthe Unload, Hold or Auto key is pressed and released.

Unload KeyPress and release this key to unload the compressorslide valve. The following messages are displayed if thechiller is running or not running, respectively :

The compressor slide valve will continue to unload untilthe Load, Hold or Auto key is pressed and released.

Hold KeyPress and release this key to hold the compressor slidevalve at its current position. The following messages aredisplayed if the chiller is running or not running,respectively :

The compressor slide valve will continue to hold untilthe Load, Unload or Auto key is pressed and released.

SYSTEM READY TO START - SLIDE VALVE LOADING

SYSTEM RUN - SLIDE VALVE LOADING

SYSTEM READY TO START - SLIDE VALVE UNLOADING

SYSTEM RUN - SLIDE VALVE UNLOADING

SYSTEM READY TO START - SLIDE VALVE HOLDING

SYSTEM RUN - SLIDE VALVE HOLDING

6.

Page 17: YS MILLENIUM

17

035L02377-GB0

6.3 WARNING RESET KEY

The Warning Reset key is pressed and released to resetany “warning” or “status” messages, unless the conditionstill exists. To reset a cycling or warning message, placethe Control Center in service mode and press WarningReset key. To reset any safety shutdown message, pressWarning Reset key in service mode with the compressorswitch in the Stop/Reset position.

6.4 DISPLAY DATA KEY

The Display Data key is used to display certain systemoperating parameters that are relevant to troubleshootingthe chiller system. Press and hold the display data keyto sequentially scroll displays of the evaporator andcondenser refrigerant saturation temperatures, thedischarge gas and oil temperatures, and the compressorinlet and filter inlet oil pressures as follows :

Each message will appear for 2 seconds. To hold eachof the messages, press and release the Display Datakey, then press and release the Display Hold key. thefirst message will be displayed and updated every 2seconds. When the Display Data key is again pressedand released the second message is then displayed andupdated every 2 seconds. This can then be repeated toview the third message and then the first message againand so on. When the Display Hold key is pressed andreleased display data messages are removed from thedisplay.

6.5 HISTORY PRINT KEY

History data for up to four cycling or safety shutdowns isstored in memory. If an optional printer is connected,the History Print key is used to initiate a print of thisdata. When the key is pressed the following message isdisplayed :

If there have been no cycling or safety shutdowns thefollowing message is displayed :

If there have been from one to four shutdowns, historydata for all the shutdowns will be printed. If there havebeen more than four shutdowns, only data for the mostrecent four will be printed.

Auto KeyPress and release this key to put the compressor slidevalve under leaving chilled water temperature controlexcept when overridden by motor current limit controls.The following message is displayed when chiller isrunning and the slide valve is stationary:

While the slide valve is loading or unloading the followingmessages are displayed respectively :

The Control Center operates in Auto slide valve controlin all modes other than Service Mode.

SYSTEM RUN - AUTO SLIDE VALVE

OIL = XXXX KPA: FILTER = XXX KPA

SAT TEMPS EVAP = XX.X 0C, COND = XX.X 0C

HISTORY PRINT ENABLE

INVALID HISTORY DATA WILL NOT BE PRINTED

SYSTEM RUN - SLIDE VALVE LOADING

SYSTEM RUN - SLIDE VALVE UNLOADING

DISCHARGE TEMP = XX.X 0C, OIL TEMP = XX.X 0C

6.

Page 18: YS MILLENIUM

18

035L02377-GB0

7. MODE KEYS & COMPRESSOR SWITCH

7.2 OPERATING MODES

The Chiller can be operated in three different operatingmodes as follows:

LocalLocal is the normal operating mode. The compressorcan be started and stopped from the Control Centerwhere the Display and Setpoints parameters can alsobe displayed.

RemoteIn this mode, the Control Center will accept control signalsfrom a remote device (i.e., Energy Management System)or cycling inputs. The control signal inputs are :

7.1 PROGRAM MODE

Program mode allows the operator to program theSetpoints parameters, and change operating modes. Toenter Program Mode proceed as follows :

Press the Access Code key to display the followingmessage:

In the Entry keys section, press the digit keys 9 6 7 5then press the Enter key. As each digit is pressed, thecharacters Y O R K are displayed (if other digits areused, the characters Y O R K are still displayed).

If incorrect digits are entered the following messageappears for a few seconds:

The display then returns to the code entry message andfurther attempts can be made.

If the correct digits are entered the following message isdisplayed:

Now press the Program key to display the followingmessage :

Access is now granted to adjust the operating setpointsusing the Setpoints keys, or to change the Chilleroperating mode using the Mode key.

Access to the Program key can be terminated by againpressing the Access Code key. The following messagewill be displayed:

If access is not terminated manually, it is automaticallydisabled after 10 minutes have elapsed, after which theoperator must again enter the valid access code.

ACCESS TO PROGRAM MODE DISABLED

PROGRAM MODE, SELECT SETPOINT

ACCESS TO PROGRAM KEY AUTHORIZED

INVALID ACCESS CODE

ENTER VALID ACCESS CODE __ __ __ __

7.

Page 19: YS MILLENIUM

19

035L02377-GB0

Remote StartRemote StopRemote LCWT SetpointRemove Current Limit Setpoint

Service ModeService mode enables the Slide Valve control keys andthe Warning Reset key in the Service keys Section ofthe keypad - see Section 7.

Viewing the Operating ModeTo determine which operating mode the Control Centeris presently in, press the Mode key. One of the followingmessages will appear to indicate the current operatingmode :

Changing the Operating ModeTo change the operating mode enter Program Mode asdescribed in Section 8.1. Instead of selecting a setpointto change, press the Mode key to display the modecurrently selected. One of the following messages willbe displayed:

To change the selected mode press the Advance Daykey in the Entry keys section of the keypad to scrollthrough the available modes. When the desired mode isshown, press the Enter key. The display will then revertto the Program Mode message. Program Mode may thenbe terminated manually by pressing the Access Codekey.

7.3 COMPRESSOR SWITCH

The Compressor Switch is used to locally control therun status of the compressor, and to reset the ControlCenter after a safety shutdown.

This switch functions as the local chiller emergencystop device.

Start PositionThe chiller must receive a “start” signal to begin operationafter a manual “stop” signal or a safety shutdown. Thiscan be achieved locally only if the chiller is in Local

operating mode - see Section 8.2. To start the chillerlocally, turn the Compressor Switch to the Start positionthen release it. The switch will spring-return to Runposition and the compressor start sequence will beinitiated.

Run PositionDuring normal operation the Compressor Switch shouldbe in the Run position. This will allow the compressor torun whenever the automatic controls require, or to restartautomatically after a cycling shutdown.

Stop/Reset PositionThe chiller can be stopped locally, regardless of operatingmode, by turning the Compressor Switch to theStop/Reset position. Once in this position, the chiller canonly be started, locally or remotely, by locally turningthe switch back to the Run position. In this way the switchoperates as the chiller emergency stop device andcannot be overridden remotely.

Following a safety shutdown (and identification andrectification of the problem) the operator is required toreset the Control Center prior to restarting the system.This is achieved by turning the Compressor Switch fromRun to the Stop/Reset position, then back to the Runposition.

LOCAL OPERATING MODE IN EFFECT

SERVICE OPERATING MODE IN EFFECT

REMOTE OPERATING MODE IN EFFECT

LOCAL MODE SELECTED

SERVICE MODE SELECTED

REMOTE MODE SELECTED

7.

Page 20: YS MILLENIUM

20

035L02377-GB0

8. PROGRAMMING THEMILLENNIUM CONTROL CENTER

8.1 GENERAL

The Control Center setpoints can be entered or changedat any time. This can be done even if the chiller is running,although in some cases the change may not take effectimmediately due to internal timers.

Before entering or changing the system setpoints, it isnecessary to select Program Mode so that the followingmessage is displayed (see Section 7.1) :

When entering a setpoint, all digits must be entered.Use leading zero(s) and/or a zero after the decimal placeif these digits are not required.

The Enter key must be pressed after any new or changedvalue has been keyed in. The new value is only acceptedby the Control Center when the Enter key is pressed.Advancing to the next message or leaving Program Modewithout pressing the Enter key will cause the new valueto be ignored and the old value to remain as the setpoint.

If at any time an entered value falls outside theprogrammable range, the following message will bedisplayed for 2 seconds:

followed by the above Program Mode message.

If a mistake is made while entering a value, or the defaultsetting is required, press the Cancel key and then theEnter key. The display will revert to the default value forthat setpoint and the cursor will return to the firstchangeable digit.

8.2 CHILLED LIQUID TEMPERATURE SETPOINTS

To program the chilled liquid leaving temperature setpointand restart offset select Program Mode then press theChilled Liquid Temps key.

Leaving Temperature SetpointWhen the key is pressed, the following message will bedisplayed:

“(BASE)” advises that this value is the base setpoint forthe chiller. A remote leaving chilled liquid temperaturesetpoint offset signal from a BAS/EMS will offset upwardsfrom this value.

LEAVING SETPOINT = XX.X 0C (BASE)

PROGRAM MODE, SELECT SETPOINT

OUT OF RANGE - TRY AGAIN !

Use the Entry keys to program the required chilled liquidleaving temperature setpoint then press the Enter key.The programmable range for the setpoint is:

Water Cooling applications 3.3°C to 21.1°CGlycol Cooling applications -6.7°C to 21.1°C(Ice Storage applications -6.7°C to 0°C)

The default setting for chilled leaving liquid temperaturesetpoint is 7.2°C.

The Control Center will only accept setpoint values below3.3°C (for Glycol or Ice Storage applications) whenprogram jumper JP3 on the microprocessor board hasbeen removed.

Restart OffsetPress the Advance Day/Scroll key to display the followingmessage:

The restart offset is the number of degrees above thesetpoint at which the chiller will automatically restart aftera cycling shutdown on low leaving temperature.

Use the Entry keys to program the required restart offsetthen press the Enter key. The programmable range forthe offset is 0°C to 5.5°C. The default value is 0°C.

For Water Cooling applications, programming of theleaving temperature setpoint and offset is now completeand Program Mode can be terminated or another setpointselected.

If Glycol or Ice Storage application is selected (programjumper JP3 removed) press the Advance Day/Scroll keyagain to display the following message:

Using the Entry keys, enter ‘0’ for standard Glycol Coolingor enter ‘1’ for Glycol Cooling with Ice Storage function(below 0°C), then press the Enter key.

In Ice Storage mode the restart offset can be setindependently for operation in Ice Storage (below 0°C)and standard Glycol Cooling (above 0°C). To set theIce Storage mode offset press the Advance Day/Scrollkey again to display the following message:

Use the Entry keys to program the required restart offsetthen press the Enter key. The programmable range forthe offset is 0°C to 5.5°C. The default value is 0°C.

LWT RESTART OFFSET = X.X 0C

ICE STORAGE MODE ? 0 ( YES=1; NO=0 )

ICE STORAGE LWT RESTART OFFSET = X.X 0C

8.

Page 21: YS MILLENIUM

21

035L02377-GB0

Programming of the leaving temperature setpoint andoffset is now complete and Program Mode can beterminated or another setpoint selected.

8.3 CURRENT LIMIT SETPOINT

To program the current limit setpoint select ProgramMode then press the % Current Limit key. One of thefollowing message will be displayed:

Solid State Starter fitted:

Electromechanical Starter fitted:

Use the Entry keys to program the required current limitvalue as a percentage of full load current, then pressthe Enter key. The programmable range for this setpointis 40% to 100% FLA. The default value is 100%.

The MTR CUR = ___FLA message on Solid StateStarter applications displays the full load current valuein amps for the compressor drive motor. This value isfactory set and is not user programmable.

Programming of the current limit setpoint is now completeand Program Mode can be terminated or another setpointselected.

Note : a preprogrammed limit, the Minimum Allowable%FLA, determines the lowest allowable motor currentpermitted after the chiller has been running for 3 minutes.The chiller will not be allowed to unload below this limit.If the limit value is greater than the programmed CurrentLimit value then the Minimum Allowable %FLA haspriority.

CURRENT LIMIT = XXX %FLA; MTR CUR = _ _ _ FLA

CURRENT LIMIT = XXX %FLA

8.4 PULL-DOWN DEMAND SETPOINT

To program the pull-down demand setpoint selectProgram Mode then press the Pull Down Limit key todisplay the following message:

Us the Entry keys to program the required duration ofthe limit in minutes and the current limit value as apercentage of full load current, then press the Enter key.The programmable range for this setpoint is 1 to 255minutes time duration and 100% to 40% FLA currentlimit. The default values are 00 minutes at 100 %FLA.

Note : a preprogrammed limit, the Minimum Allowable%FLA, determines the lowest allowable motor currentpermitted after the chiller has been running for 3 minutes.The chiller will not be allowed to unload below this limit.If the limit value is greater than the programmed Pull-

SETPOINT = XXX MIN @ XXX %FLA XXX MIN LEFT

down Demand Limit value then the Minimum Allowable%FLA has priority.

8.5 INTERNAL CLOCK SETTING

To program the Control Center internal clock and 7 daycalendar, check that the microprocessor board programjumper J57 is in the “CLKON” position, then selectProgram Mode and press the Clock key to display thefollowing message:

To set the correct date and time proceed as follows:1. Press the Advance Day/Scroll key until the correct

day of the week appears.2. Use the Entry keys to program the time of day.3. Press the AM/PM key to change AM to PM or vice

versa.4. Use the Entry keys to program the date in the order

Month-Day-Year (if the month or day are a singledigit a leading zero should be used, eg. 01/02/98).

5. Press the Enter key.Programming of the internal clock is now complete andProgram Mode can be terminated or another setpointselected.

TODAY IS SUN 12 : 00 AM 1 / 1 / 90

8.6 DAILY OPERATING SCHEDULE

To program the chiller daily operating schedule selectProgram Mode then press the Daily Schedule key todisplay the following message:

Programming an individual dayTo program the schedule for an individual day in theweekly schedule, or the holiday day schedule, proceedas follows:1. Press the Advance Day/Scroll key until the required

day of the week or HOL (holiday) appears.2. To cancel the programmed schedule, press the

Cancel key then go to step 6, otherwise continue atstep 3.

3. Use the Entry keys to program the required start time.4. Press the AM/PM key to change AM to PM or vice

versa. If the required setting is already displayed, gostraight to the next step - the cursor will automaticallymove to the stop time.

5. Use the Entry keys to program the required stop time.6. Press the Enter key.Programming of the schedule is now complete andProgram Mode can be terminated or another setpointselected.

Programming a full weekTo program the schedule for an entire week with a regularschedule for weekdays proceed as follows:

DAY START = XX : XX AM STOP = XX : XX AM

8.

Page 22: YS MILLENIUM

22

035L02377-GB0

1. Press the Advance Day/Scroll key until SUN (Sunday)appears.

2. Program the start and stop times for Sunday usingsteps 2 - 5 in “Programming an individual day” above(do not press the Enter key).

3. Press the Advance Day/Scroll key.4. Program the start and stop times for Monday using

steps 2 - 5 in “Programming an individual day” above(do not press the Enter key).

5. Press the Advance Day/Scroll key.The following message will now be displayed:

6a.To program the same start and stop time for Mondayto Friday, press “1”, then press the Advance Day/Scroll key to jump straight to Saturday.

6b.To program different start stop times for Monday toFriday, press “2”, then press the Advance Day/Scrollkey to advance to Tuesday.

7. Program the schedule for the remaining week daysand the holiday day schedule.

8. Press the Enter key to store the schedule.Programming of the schedule is now complete andProgram Mode can be terminated or another setpointselected.

Note : if only a start time is entered for a particular day,the compressor will not automatically stop until ascheduled stop time is encountered on a subsequentday.

The daily schedule can be overridden at any time usingthe Compressor switch.

REPEAT MON. SCHEDULE MON-FRI ? YES = 1; NO = 2

8.7 HOLIDAY DAY SCHEDULE

One or more days of the week can be designated tooperate on the programmed Holiday day schedule(Section 8.6) as a one off event. After the designatedday has past, the start / stop times will revert to thestandard schedule. To designate days to operate on theHoliday day schedule select Program Mode then pressthe Holiday key to display the following message:

Press the Advance Day/Scroll key to move the cursor tothe day to be designated. Press the Asterisk (*) key toenter an asterisk beside the required day. Repeat thisprocedure for further days as necessary. On completion,press the Enter key to store the schedule. Program Modecan now be terminated or another setpoint selected.

To remove the Holiday day designation asterisk from aspecific day, repeat the procedure as above but pressthe Cancel key instead of the Asterisk key. Rememberto finish by pressing the Enter key to store the schedule.

S_ M_ T_ W_ T_ F_ S_ HOLIDAY NOTED BY *

8.8 REMOTE RESET TEMPERATURE RANGE

The remote reset temperature range decides themaximum number of degrees by which the leaving chilledliquid temperature setpoint can be offset upwards by aremote reset signal. To program this limit, select ProgramMode then press the Remote Reset Temperature Rangekey to display the following message:

If either of the above ranges are desired, program theappropriate number using the Entry keys, then pressthe Enter key. Only use the number options given,remembering to use a leading zero for 5.6 0C (05.6). Ifneither of these ranges are required, press the AdvanceDay/Scroll key to display the following message:

Program the required number from the options givenusing the Entry keys then press the Enter key.

REMOTE RESET RANGE ( 5.6 OR 11.1 ) = XX.X 0C

REMOTE RESET RANGE ( 16.6 OR 22.2 ) = XX.X 0C

8.9 DATA LOGGING SETUP

An automatic data logging function is available to produceregular printouts of operating data on an attached printer(available as an option). To program the data loggingsetup select Program Mode then press the Data Loggerkey to display the following message:

To program the logging setup proceed as follows :1. If “PRT” does not equal “WTO” then press theAdvance Day/Scroll key to scroll through the printeroptions until WTO appears.2. Use the Entry keys and AM/PM key to programthe required start time for the data logging.3. Use the Entry keys to program the logging intervalbetween 0.1 and 25.5 hours.4. Press the Enter key to store the logging setup.Programming of the logging setup is now complete andProgram Mode can be terminated or another setpointselected.

PRT START = 12 : 00 PM ; __.0 HRS ; PRT = WTO

8.

Page 23: YS MILLENIUM

23

035L02377-GB0

Low Load Limit Control

This message is displayed if after more than 3 minutesof operation the motor current drops to less than aminimum allowable limit. This limit is preprogrammedbetween 15% and 70% FLA, depending on application,and is used to avoid the possibility of separator oil lossdue to excessively low load. While this message isdisplayed, a 1 second load signal is applied to the slidevalve every 3 seconds until the motor current is greaterthan or equal to the programmed setpoint plus 2%.

If the shutdown was caused by a safety limit then thechiller must be reset at the Compressor Switch thengiven a new start signal before it can resume operation.If the chiller has been reset but a local or remote startsignal has not yet been received, the following messageis displayed:

The reason for the shutdown or any warning messagescan be displayed by pressing the Status key. These canbe cleared from the display by entering Service Modeand pressing the Warning Reset key. They will beautomatically cleared by initiating a compressor start.

Status Messages - Startup & ShutdownSequencesDuring the short periods immediately before and afterstartup and shutdown, status messages are displayedgiving information regarding the sequence.

Backup Battery Condition MessageIn the event of a power failure, a battery in the real timeclock chip (RTC - U16 on micro board) provides backuppower to the memory to ensure programmed setpointsare retained. The following message indicates that thebattery is defective and that the chip should be replaced:

If there had been a power failure while this message isdisplayed, the setpoints will have been lost and must bereprogrammed.

9. STATUS KEY &STATUS MESSAGES

9.1 GENERAL

The Millennium Control Center constantly monitors awide range of functions and parameters while the chilleris in operation. The Control Center then uses numerousalgorithms to keep the operating parameters withinacceptable limits while maintaining the correct leavingchilled liquid temperature.

Various types of status messages are displayed at thekeypad display to inform the operator of the currentoperating status of the chiller. The messages areautomatically displayed unless the operator is requestingother information via the keypad. Status messages fallinto three general categories as follows:

Status Messages - Chiller RunningWhile the chiller is running “System Run” messagesadvise which condition is currently controlling the chillerload status as follows:

Background “Warning” messages advise of potentialproblems with the chiller. When a warning status existsthe operator will be advised to press the Status key bythe following message:

The warning message will then be displayed:

If the Status key is pressed without being instructed toby the Press Status prompt, the following message isdisplayed:

Status Messages - Chiller Not RunningWhen the chiller is idle and all conditions forcommencement of operation are met the followingmessage is displayed:

When the chiller has been running and then hasshutdown again, “System Shutdown” messages advisethe time and reason for the shutdown and also if thechiller will automatically restart when conditions allow:

In general shutdowns are caused by “cycling” conditionssuch as low chilled liquid leaving temperature or dailystart/stop schedule and restart will be automatic.

SYSTEM RUN - MESSAGE

SYSTEM RUN - PRESS STATUS

WARNING : MESSAGE

NO MALFUNCTION DETECTED

DAY TIME - REASON FOR SHUTDOWN (AUTOSTART)

SYSTEM READY TO START - PRESS STATUS

SYSTEM READY TO START

9.2 SYSTEM RUN STATUS MESSAGES

Leaving Chilled Liquid Temperature Control

This message is displayed when the chiller is operatingnormally and the compressor slide valve is beingcontrolled to maintain the correct leaving chilled liquidtemperature.

SYSTEM RUN - LEAVING TEMP. CONTROL

SYSTEM RUN - MINIMUM LOAD CONTROL

REPLACE RTC, U16 - REPROGRAM SETPOINTS

9.

Page 24: YS MILLENIUM

24

035L02377-GB0

High Load Limit Control

On some compressor / heat exchanger combinations,operating at extreme conditions, it is possible to overloadthe oil separator at high leaving chilled liquidtemperatures. To prevent this some chillers arepreprogrammed with a motor current limit between 60%and 100% FLA, depending on application, which is ineffect until the leaving chilled liquid temperature is lessthan a second preprogrammed limit between 100C and21.10C.

9.3 SYSTEM RUN WARNING MESSAGES

Certain fault conditions may occur while the chiller isrunning which cannot be corrected by adjusting the slidevalve control, but do not require a safety shutdown ofthe chiller. In these cases a warning message is issuedto advise the operator of the condition. The followingmessage is displayed instructing the operator to pressthe Status key :

On pressing the key one of the following warnings willbe displayed:

Service Mode Slide Valve Control

These messages are displayed when the chiller isoperating in Service Mode and the slide valve positionis being controlled by leaving chilled liquid temperature(Auto) or is being manually controlled - see Section 6.2.

Low Superheat Limit Control

This message is displayed if after more than 3 minutesof operation the discharge gas superheat is less than orequal to 5.6°C (R22); 2.8°C (R134a). When this occursthe slide valve is inhibited from loading.

If the condition exists continuously for more than 10seconds, the slide valve unload solenoid will be drivenwith 0.5 second pulses at 3 second intervals until thedischarge gas superheat is equal to or greater than 8.3°Cwhereupon the following message is displayed:

Pressing the status key produces the following message:

This message automatically clears when the conditionclears.

SYSTEM RUN - CURRENT LIMIT IN EFFECT

SYSTEM RUN - HIGH PRESSURE LIMIT IN EFFECT

SYSTEM RUN - LOW PRESSURE LIMIT IN EFFECT

Low Evaporator Pressure Limit Control

This message is displayed when the chiller is runningand the evaporator pressure falls to 388kPa (R22);186kPa (R134a). The slide valve is prevented from furtherloading to prevent shutdown on low- evaporator pressureat 374kPa (R22); 172kPa (R134a). When evaporatorpressure rises to 397kPa (R22); 193kPa (R134a), theslide valve will again be permitted to load.

Note: this limit control is not used when Micro Boardprogram jumper JP3 is removed for low temperatureglycol applications.

High Condenser Pressure Limit Control

This message is displayed when the chiller is runningand the condenser pressure rises to 1733kPa. The slidevalve is inhibited from further loading to prevent systemshutdown on high condenser pressure at 1862kPa. Whenthe condenser pressure falls to 1724kPa the slide valvewill again be permitted to load.

High Refrigerant Differential Pressure Limit Control

This message is displayed if after more than 60 secondsof operation the condenser pressure exceeds theevaporator pressure by 227kPa or more, and the slidevalve is at or below the “minimum slide valve position”

SYSTEM RUN - MIN. SLIDE VALVE OVERRIDE

High Motor Current Limit Control

This message is displayed when the chiller is running,and the motor current is equal-to or greater-than theoperator programmed current limit value. When the motorcurrent reaches 100% of this value, the slide valve isnot permitted to load further. If the current continues torise to 104% of this value, the slide valve will be unloadedjust far enough to reduce the current to less than 104%of the operator programmed current limit.

SYSTEM RUN - EXCESS CHARGE OVERRIDE

SYSTEM RUN - PRESS STATUS

WARNING : EXCESS REFRIGERANT CHARGE

SYSTEM RUN - SLIDE VALVE LOADING

SYSTEM RUN - AUTO SLIDE VALVE

SYSTEM RUN - SLIDE VALVE UNLOADING

SYSTEM RUN - SLIDE VALVE HOLDING

SYSTEM RUN - PRESS STATUS

SYSTEM RUN - LOAD LIMIT IN EFFECT

which is calculated as follows:

Minimum Slide Valve Position (%) = (Cond. press - Evap. Press - 227) / 56.2

At this position the slide valve is inhibited from unloading.Below this position the slide valve load solenoid will bedriven by 0.1 second pulses at 0.5 second intervals untilthe minimum slide valve position is reached.

9.

Page 25: YS MILLENIUM

25

035L02377-GB0

The chiller is shut down because a chilled liquid flowswitch has opened for more than 2 seconds. The flowswitch is checked at 25 seconds into the compressorstart sequence, and continuously thereafter.

A remote command (computer relay contact or manualswitch) connected to the Remote/Local cycling input ofthe digital input board has shut down the chiller.

A Lead/Lag sequence control device connected to theMulti Unit cycling input of the digital input board hasshut down the chiller.

(Solid State Starter Application Only)The chiller is shut down because the voltage in any phaseof the line voltage has decreased to the undervoltageshut down threshold continuously for more than 20seconds or at any time during the compressor startsequence.

(Solid State Starter Applications Only)The chiller is shut down because the voltage in any phaseof the line voltage has increased to the overvoltage shutdown threshold continuously for more than 20 secondsor at any time during the compressor start sequence.

Note:The voltage setting for the chiller can be viewed bypressing the SSS Motor Current / Volts key in the DisplayKeys section of the Keypad while the Control Center isin Program Mode (see Section 7.1). The followingmessage appears when the key is pressed:

Shutdown and restart voltage levels for each voltagerange are as follows:

The chiller is shut down because the solid state starter,or electromechanical current module (CM-2) indicateda “Power Fault”. This is initiated if the motor controllercontacts (CM-1) open and reclose in less than 3 seconds.

See System Run - Low Superheat Limit Control (above).

This warning is displayed if the oil filter differentialpressure exceeds 138kPa continuously for more than 5seconds. This message automatically clears when thecondition clears.

This warning is displayed when the oil temperature risesto 73.9°C. This message automatically clears when thecondition clears.

This warning is displayed if the condenser pressuretransducer indicates a pressure equal to or greater than2138kPa continuously for more than 10 minutes. Thismessage can be reset in service mode using the WarningReset key.

WARNING : EXCESS REFRIGERANT CHARGE

WARNING : DIRTY OIL FILTER

WARNING : HIGH OIL TEMPERATURE

WARNING : COND TRANSDUCER ERROR

9.4 SHUTDOWN STATUS MESSAGES

When the chiller is not running due to a cycling, safetyor operator initiated shutdown the Control Center displaywill show the following message :

When the Status key is pressed a system shutdownmessage giving the time and reason for the last shutdownwill be displayed for 2 seconds before returning to the“Press Status” message. The display can be heldindefinitely by pressing display hold key while theshutdown message is showing.

The time and day of the shutdown can have any value,but for the following example messages these will betaken as 10:00 am on Monday morning.

SYSTEM SHUTDOWN - PRESS STATUS

Cycling Shutdown MessagesCycling shutdowns allow the chiller to automaticallyrestart as soon as the reason for the shutdown clears:

The chiller is shutdown on because the leaving chilledliquid temperature has dropped to 2.20C below thesetpoint.

The operator programmed daily schedule has shut downthe chiller. The chiller will automatically restart when thedaily start schedule initiates a start. The schedule canbe overridden by turning the Compressor Switch to thestart position.

MON 10 : 00 AM - LOW WATER TEMP - AUTOSTART

MON 10 : 00 AM - FLOW SWITCH - AUTOSTART

MON 10 : 00 AM - SYSTEM CYCLING - AUTOSTART

MON 10 : 00 AM - MULTI UNIT CYCLING - AUTOSTART

MON 10 : 00 AM - INTERNAL CLOCK - AUTOSTART

MON 10 : 00 AM - LOW LINE VOLTAGE

MON 10 : 00 AM - HIGH LINE VOLTAGE

SUPPLY VOLTAGE RANGE XXX

MON 10 : 00 AM - POWER FAULT - AUTOSTART

LOW/HIGH LINE VOLTAGE TRIP/RESET VALUES

COMPRESSOR LOW LINE VOLTAGE HIGH LINE VOLTAGE

MOTOR OPERATING POINT OPERATING POINT

VOLTAGE SHUTDOWN RESTART SHUTDOWN RESTART

RANGE (ON FALL) (ON RISE) (ON RISE) (ON FALL)

380 (400) 305 331 415 402

415 335 362 454 440

SUPPLY VOLTAGENONE 0 NONE 0

RANGE DISABLED

9.

Page 26: YS MILLENIUM

26

035L02377-GB0

The chiller is shut down because the evaporator pressurehas dropped to 374kPa (R22); 172kPa (R134a). Restartis allowed when the pressure increases to 375kPa (R22);173kPa (R134a) and the chiller is reset.

The chiller is shut down because the low evaporatorpressure safety switch contacts have opened. On glycol(brine) applications a this separate low pressure switchis located external to the Control Center and has cutoutsettings appropriate to the application. Restart is allowedwhen the pressure rises above the switch reset settingand both the safety switch and the chiller are reset.

The chiller is shut down because condenser pressurehas risen to 1862kPa and the high pressure safety controlcontacts (located on the condenser) have opened.Restart is allowed when pressure has dropped belowthe switch reset setting (1448kPa) and both the safetyswitch and the chiller are reset.

The chiller is shut down because the dischargetemperature has reached 100°C Restart is allowed whenthe temperature has fallen below 99.4°C and the chilleris reset.

The chiller is shut down because the oil temperaturehas reached 76.7°C Restart is allowed when thetemperature has fallen below 76.1°C and the chiller isreset.

The chiller is shut down because the differential oilpressure (oil pressure at inlet to compressor - evaporatorpressure) was less than 138 kPa when the chiller hadbeen running for more than 3 minutes. Restart is allowedwhen the chiller is reset.

The chiller is shut down because the separator oil levelswitch has opened continuously for more than 30seconds, indicating a low oil level in the separator. Restartis allowed when the chiller is reset.

The chiller is shut down because the oil filter differentialpressure exceeded 172kPa continuously for more than5 seconds. Restart is allowed when the chiller is reset.

The chiller is shut down because the transducer sensingoil pressure at the inlet to the compressor indicated2069kPa or more. Restart will be allowed when thepressure has fallen below 2062kPa and the chiller is

MON 10 : 00 AM - OIL PRESSURE TRANSDUCER

MON 10 : 00 AM - CLOGGED OIL FILTER

MON 10 : 00 AM - LOW OIL PRESSURE

MON 10 : 00 AM - LOW SEPARATOR OIL LEVEL

The chiller is shut down because the chiller was operatingin normal “Leaving Temperature Control” but the motorcurrent was continuously less than 10%FLA for 25seconds. This indicates that either an AC undervoltagecondition has caused the start relay (1R) to de-energize,or a component has failed causing a loss of the startsignal from the Control Center.

The chiller is shut down because micro board did notreceive a hardware-generated interrupt on schedule. Thiscan be caused a hardware failure or electrical noise onmicro board. The message indicates that the watchdogtimer-circuit has reset the microprocessor and thesoftware program has been initialized from the beginning.

The chiller is shut down because the solid state starter,or electromechanical current module (CM-2) indicateda fault. Restart occurs automatically for the following faultconditions:1. Solid State Starter - power fault, 110°F start inhibit,

phase rotation/loss, out of lock.2. Electromechanical Starter current module - power

fault (see POWER FAULT - AUTOSTART).For other fault conditions the external device whichcaused the shutdown must be reset.

The chiller is shutdown and this message is displayed ifone of the following occurs:1. A chiller start was initiated but the slide valve position

was greater than 10%.2. The chiller was shut down by any stop signal but the

slide valve did not return to a position of less than10% within the 2 minute lockout period.

Note : if the micro board jumper JP4 is not connected(hot gas bypass fitted), this shutdown and messageoccurs at a slide valve position of 30%

The chiller is shut down because it is operating in RemoteMode and a remote device (typically an EnergyManagement System or Building Automation System)has commanded the chiller to shut down. Restart occurson application of a separate start signal from the remotedevice.

REMOTE STOP

MON 10 : 00 AM - SLIDE VALVE ABOVE 10%

Safety Shutdown MessagesSafety shutdowns require the operator to manually resetthe chiller at the Compressor Switch after rectificationof the fault - see Section 7.3.

MON 10 : 00 AM - LOW EVAP PRESSURE

MON 10 : 00 AM - LOW EVAP PRESSURE - BRINE

MON 10 : 00 AM - HIGH PRESSURE

MON 10 : 00 AM - HIGH OIL TEMP

MON 10 : 00 AM - HIGH DISCHARGE TEMP

MON 10 : 00 AM - AC UNDERVOLTAGE - AUTOSTART

MON 10 : 00 AM - PROGRAM INITIATED RESET

MON 10 : 00 AM - MOTOR CONTROLLER - EXT. RESET

9.

Page 27: YS MILLENIUM

27

035L02377-GB0

The reason for the shutdown or any warning messagescan be displayed by pressing the Status key.

The chiller may not restart more frequently than every30 minutes. This message is displayed if the chiller isshut down at less than 30 minutes from startup andshows the time remaining on the anti-recycle timer. Innormal operation, the chiller cannot be restarted untilthe timer reaches zero.

reset.

The chiller is shut down because the transducer sensingoil pressure at the inlet to the compressor indicated morethan 138kPa above condenser pressure condenserpressure transducer reading for more than 10 minutescontinuously. Restart is allowed when the chiller is reset.

The chiller is shut down because the evaporationsaturation temperature (calculated from the evaporatorpressure transducer reading) is more than 13.9°C belowor more than 1.4°C above the leaving chilled liquidtemperature for more than 10 minutes continuously.Restart is allowed when the chiller is reset.

Note : on low temperature glycol applications (microboard jumper JP3 out) this check is not performed atevaporator pressures below 341kPa. If hot gas bypassis also fitted (micro board jumpers JP3 and JP4 out)this check is not performed at all.

The chiller is shut down because the dischargetemperature sensor reading is lower than -1.2°C or isdisconnected. Restart is allowed when the sensorreading is above -1.1°C and chiller is reset.

The system is shut down because an external auxiliarysafety shutdown device, connected to digital input board,has initiated a system shutdown. This input is a generalpurpose input that can be used to indicate a user-definedsafety shutdown. Restart is allowed when the externaldevice and the chiller are reset.

The chiller is shut down because the Control Centerhas detected a motor-current value greater than 15%FLA for more than 10 seconds while the compressorstart signal is not energized. Restart is allowed whenthe chiller is reset.

(Solid State Starter Applications Only)The chiller is shut down because one of the motor linecurrents was more than 30% different from the averageline current for more than 45 seconds (the currentbalance is only checked when the motor has beenrunning for more than 45 seconds and the motor currentis 80% FLA or greater). Restart is allowed when thechiller is reset.

The chiller is shut down because there has been a powerinterruption or failure. Restart is allowed when power isrestored and the chiller is reset.

MON 10 : 00 AM - EVAP TRANS OR PROBE ERROR

MON 10 : 00 AM - FAULTY OIL OR CONDENSER XDCR

MON 10 : 00 AM - FAULTY DISCHARGE TEMP SENSOR

MON 10 : 00 AM - AUX SAFETY SHUTDOWN

MON 10 : 00 AM - STARTER MALFUNCTION DETECTED

MON 10 : 00 AM - MTR PHASE CURRENT UNBALANCE

MON 10 : 00 AM - POWER FAILURE

9.5 STARTUP/RUNDOWN STATUS MESSAGES

The following status messages are displayed for shortperiods immediately before or after chiller run periods:

Indicates the Control Center has received a local orremote start signal and has initiated the chiller startsequence. Message is displayed for 30 seconds whilepressure transducers are auto-zeroed.

This message is displayed any time the chiller shutsdown. It indicates that a 2 minute restart delay is in effect.While the delay is in effect, the message will indicatethe time remaining in 0.1 minute steps. This delay allowssystem pressures to equalize so that the pressuretransducers can be auto-zeroed during the startsequence. If the shutdown was caused by a safety limitthen the chiller must be reset at the Compressor Switchthen given a new start signal before it can resumeoperation. If the chiller has been reset but a local orremote start signal has not been received yet, thefollowing message is displayed:

START SEQUENCE INITIATED

2.0 MINUTE LOCKOUT DELAY

2.0 MINUTE LOCKOUT DELAY - PRESS STATUS

ANTI-RECYCLE, XX MIN LEFT

9.

Page 28: YS MILLENIUM

28

035L02377-GB0

10. MICRO BOARD JUMPERS

J57

J52

JP4

JP3

JP3 Link In Place : Chiller programmed for watercooling operating range..Link Cut : Chiller programmed for lowtemperature glycol cooling range.

JP4 Link In Place : Chillers with S1 to S5 compressorsand without Hot Gas Bypass fitted.Link Cut : All chillers with S0 compressors, andchillers with S1 to S5 compressors and Hot GasBypass fitted

J52 Jumper Fitted : System pressures andtemperatures display in Imperial units (0F psig).Jumper Removed : System pressures andtemperatures display in Metric units ( 0C, kPa ).

J57 Jumper in CLK ON position : Internal clock and7 day calendar is operational (To start clock, placejumper in this position with power on to the ControlCenter)Jumper in CLK OFF position : Internal clockdisabled to save increase life of memory backupbattery (backup operates in both jumperpositions).

10.

Page 29: YS MILLENIUM
Page 30: YS MILLENIUM
Page 31: YS MILLENIUM
Page 32: YS MILLENIUM

32

035L02377-GB0

EuropePart No. 035L02377-GB0 (01/98)

��78��������������#��������������

�����-��������'�*

�����������������

9�����:������9! 9!�����:������9

; 1�3�/ 1�/ 1;�$

$ 1�,�& 1�& "��

/ 1�"�" 1�$ &�/

�� 1���� 1�� �;�$

�& 1/�4 1�; �$�;

�; 1&�3 1/ �3�&

�$ 1$�$ 1& ����

�/ 1��� 1$ �$�/

"� ;�; 1� �/�$

"& ��� ; "��;

$; $�$ � ",�&

$$ &�3 $ "4��

$/ /�4 & $��/

,� ���� / $&�$

,& �"�" �; ,;�;

&; �,�& �� ,"�&

&$ �3�/ �$ ,3��

&/ �;�; �& &;�/

3� ���� �/ &$�$

3& �$�$ �; &/�;

/; �&�3 �� 3��&

/$ �/�4 �$ 3,��

// "��� �& 3/�/

4� ""�" �/ /��$

4& ",�& "; /&�;

�;; "3�/ "� /4�&

�;$ $;�; "$ 4"��

�;/ $��� "& 4&�/

��� $$�$ "/ �;;�$

��& $&�3 $; �;$�;

��; $/�4 $� �;3�&

��$ ,��� $$ �����

��/ ,"�" $& ��$�/

�"� ,,�& $/ ��/�$

�"& ,3�/ ,; ����;

�$; &;�; ,� ��,�&

�$$ &��� ,$ ��4��

�$/ &$�$ ,& �"��/

�,� &&�3 ,/ �"&�$

�,& &/�4 &; �$;�;

�&; 3��� &� �$"�&

�&$ 3"�" &$ �$3��

�&/ 3,�& && �,;�/

�3� 33�/ &/ �,$�$

�3& /;�; 3; �,/�;

�/; /��� 3� �&��&

�/$ /$�$ 3$ �&,��

�// /&�3 3& �&/�/

�4� //�4 3/ �3��$

�4& 4��� /; �3&�;

�;; 4"�" /� �34�&

�;$ 4,�& /$ �/"��

�;/ 43�/ /& �/&�/

��� �;;�; // �4;�$

��& �;��� 4; �4$�;

��; �;$�$ 4� �43�&

��$ �;&�3 4$ �;���

��/ �;/�4 4& �;$�/

�"� ����� 4/ �;/�$

�"& ��"�" �;; ����;

�$; ��,�& �;� ��,�&

�$$ ��3�/ �;$ ��4��

Temperature Conversion Chart -Actual Temperatures

Temperature Conversion Chart -Differential Temperatures

Pressure Conversion Chart -Gauge or Differential

+�������:�����2.� 2.�����:������+��

�; &4 �;; �$�,

�; �"/ �,; ���/

"; �;3 �;; �4�;

$; �3& �,; "&�"

,; "$, ";; $"�,

&; $�$ ",; ,;�/

3; $/" $;; ,/�;

/; ,,� $,; &,�"

4; &�� ,;; 3��,

�;; &4; ,,; 34�/

��; 3,4 &;; /3�;

��; /�/ &,; 4$�"

�"; /43 3;; �;��,

�$; 4&& 3,; �;/�/

�,; �;"$ /;; ��&�;

�&; ��;" /,; ��"�"

�3; ��3� 4;; �";�,

�/; ��$� 4,; �"3�/

�4; �"�; �;;; �$,�;

�;; �"34 �;,; �,��"

��; �$$/ ��;; �,4�,

��; �,�3 ��,; �&&�/

�"; �,/& ��;; �3$�;

�$; �&,, ��,; �/��"

�,; �3�$ �";; �//�,

�&; �34" �",; �4,�/

�3; �/&� �$;; �;"�;

�/; �4"� �$,; ��;�"

�4; �;;; �,;; ��3�,

";; �;&4 �,,; ��$�/

"�; ��"/ �&;; �"��;

"�; ��;3 �&,; �"4�"

""; ��3& �3;; �$&�,

"$; �"$, �3,; �,"�/

",; �$�$ �/;; �&��;

"&; �$/" �/,; �&/�"

"3; �,,� �4;; �3,�,

"/; �&�� �4,; �/��/

"4; �&4; �;;; �4;�;

$;; �3,4 �;,; �43�"

9�����:������9! 9!�����:������9

; ;�; ; ;�;

$ ��� � "�&

/ $�$ $ 3��

�� &�3 & �;�/

�& /�4 / �$�$

�; ���� �; �/�;

�$ �"�" �� ���&

�/ �,�& �$ �,��

"� �3�/ �& �/�/

"& �;�; �/ "��$

$; ���� �; "&�;

$$ �$�$ �� "4�&

$/ �&�3 �$ $"��

,� �/�4 �& $&�/

,& "��� �/ ,;�$

&; ""�" "; ,$�;