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York YCUZ330A3, Установка, эксплуатация и обслуживание

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FORM 195.26-NM3

YORK INTERNATIONAL

25

A +12V REG supply voltage from the Power Supply
Board is converted to +5V REG by a voltage regulator
located on the Microprocessor Board. This voltage is
used to operate integrated  circuitry on the board.

Four system switches located on the Microprocessor
Board activate or deactivate the individual systems
(compressors).

POWER SUPPLY BOARD

The on-board switching power supply converts 24VAC
from the 2T transformer to +12V REG which is sup-
plied to the Microprocessor Board, Relay Board, and
40 Character Display to operate integrated circuitry.

A rectifier and filtering circuit for each motor current
circuit rectifies and filters these signals to variable DC.
These signals are then fed to the Microprocessor
Board.

RELAY OUTPUT BOARD

This board converts 0-12VDC logic level outputs from
the Microprocessor Board to 120VAC levels used by
motor contactors, solenoid valves, etc. to control sys-
tem operation. The common side of all relays on the
Relay Output Board is converted to +12V REG.

The open collector outputs of the Microprocessor Board
energize the DC relays by pulling the other side of the
relay coil to ground. When not energized, both sides of
the relay coils will be at +12VDC potential.

CURRENT TRANSFORMER  (C.T.)

A C.T. on the 3ø power wiring of each motor sends AC
signals proportional to motor current to the Power Sup-
ply Board which rectifies and filters the signal to vari-
able DC voltage (analog). This analog level is then fed
to the Microprocessor Board to allow it to monitor mo-
tor current.

40 CHARACTER DISPLAY

The 40 Character Display (2 lines of 20 characters) is
a liquid crystal display used for displaying system pa-
rameters and operator messages. The display has a
lighted background for night viewing as well as a spe-
cial feature which intensifies the display for viewing in
direct sunlight.

KEYPAD

An operator keypad allows complete control of the sys-
tem from a central location. The keypad offers a multi-
tude of commands available to access displays, pro-
gram setpoints, and initiate system commands.

BATTERY BACK-UP

The Microprocessor Board contains a Real Time Clock
integrated circuit chip with an internal battery back-up.
The purpose of this battery back-up is to assure any
programmed values (setpoints, clock, cut-outs, etc.)
are not lost during a power failure regardless of the
time involved in a power outage or shutdown period.

FIG. 10  –  POWER PANEL

26574A

SYSTEM #1 COMPRESSOR
MOTOR CONTACTORS

SYSTEM #1
CURRENT TRANSFORMER

SYSTEM #2
CURRENT TRANSFORMER

TB4 - LIQUID LINE
SOLENOID VALVE
CONNECTION

SYSTEM #2
COMPRESSOR
MOTOR
CONTACTORS

TB1 - 115VAC
SUPPLY, ALARM
CONTACTS, AND
EMERGENCY
STOP
CONNECTION
POINT

SYSTEM #2
INCOMING POWER WIRING
CONNECTION LUGS

SYSTEM #1
INCOMING POWER WIRING
CONNECTION LUGS

FAN CONTACTORS

OVERLOADS

GROUND LUGS

Содержание YCUZ330A3

Страница 1: ...0B3 YCUZ770B3 YCUZ880B3 STYLE A Supersedes 195 26 NM2 394 INSTALLATION OPERATION MAINTENANCE Form 195 26 NM3 197 With EPROM 031 01096C013 200 230 460 3 60 26569A RecipPak CONDENSING UNITS AIR COOLED R...

Страница 2: ...tial oil charge will also be included There will be an optional test to check that each control device operates correctly CODE STATUS The units are designed in accordance with UL 200 230 460 3 60 N E...

Страница 3: ...Code 3 4 7 8 See PHYSICAL DATA Factory Code Always zero S Special Blank if not used Design Level Type Start P Part Wind A Across The Line Voltage Code 17 200 3 60 28 230 3 60 46 460 3 60 58 575 3 60...

Страница 4: ...0A CONDENSER FANS POWER PANELS CONTROL PANEL SHIPPING BRACE Z COMPRESSOR 2 SUCTION LINE 1 OF 2 COMPRESSOR TERMINAL BOX GUARD MAIN SUPPORT FRAME FILTER DRYER COMPRESSOR POWER WIRING HARNESS SUCTION VAL...

Страница 5: ...FORM 195 26 NM3 YORK INTERNATIONAL 5 FIG 1 UNIT COMPONENTS CONTINUED 26575A LIQUID LINES 1 1 8 OD CHARGING PORT STOP VALVE OIL PRESSURE TRANSDUCER Z COMPRESSOR OIL PUMP SYS 1 SYS 2...

Страница 6: ...OMPRESSOR FIG 2 COMPRESSOR COMPONENTS 27296A 27294A R MOTOR TERMINALS MOTOR PRODUCTION MP SUPPRESSORS TERMINAL BOX CAPACITY CONTROL SOLENOID DISCHARGE STOP VALVE OIL PRESSURE ACCESS CONN DATA LABEL OI...

Страница 7: ...peration above 116 F requires Optional High Ambient kit PHYSICAL DATA MODEL YCU Z330A3 Z440A3 Z740B3 Z770B3 Z880B3 NOMINAL TONS 58 66 75 82 92 NO OF REFRIG CIRCUITS 2 2 2 2 2 2 ZB4K B 2 ZB4M C 1 ZB6S...

Страница 8: ...installations where winter operation is in tended and snow accumulations are expected additional unit height must be provided to insure full air flow 2 Bottom of panel to be punched in field to allow...

Страница 9: ...FORM 195 26 NM3 YORK INTERNATIONAL 9 CONTROL POWER PANEL DIMENSIONS LD00566 CONTROL POWER WIRING ENTRY SEE BELOW...

Страница 10: ...ground lug is provided for each compressor system to accommodate field grounding conductor per N E C Article 250 54 A control circuit grounding lug is also supplied Incoming ground wire range is 6 2 0...

Страница 11: ...see page 7 MCA Minimum Circuit Ampacity PW LRA Part Wind Inrush Amps RLA Running Load Amps FLA Full Load Amps CKT BRK Circuit Breaker HACR Heating Air Conditioning and Refrigeration POWERWIRING CONNEC...

Страница 12: ...ue to rough handling The units are shipped without export crating unless it is specified by Sales Order A unit should be lifted by spreader bars and inserting hooks through the holes provided in the t...

Страница 13: ...bration may be transmitted Mounting holes are provided in the steel channel for bolting the unit to its foundation See DIMENSIONS Mounting holes 11 16 dia are provided in the steel channel for bolting...

Страница 14: ...OAD lbs Kg SPRING COLOR DEFL ins mm CP 1 25 450 204 1 Red 1 22 30 9 CP 1 27 750 340 2 Orange 1 06 26 9 CP 1 28 900 408 2 Green 1 02 25 9 CP 1 32 1300 589 6 White 74 18 7 CP 2 25 900 408 2 Red 1 22 30...

Страница 15: ...with a vertical rise exceeding 25 feet should be trapped every 15 feet to provide drain points for the oil when the circuit is de activated When the circuit is re activated oil will return to the com...

Страница 16: ...lus tration above shows a double suction riser if job conditions or ASHRAE requirements make this necessary 7 Piping must also meet all applicable codes and standards for field piping FIG 5 PIPING SAM...

Страница 17: ...OR MUST NEVER BE REMOVED See Fig 7 for terminal locations Liquid Line Solenoid Valve Connection J Compressors Connect SYS 1 to terminals SP1 and 2 in Compressor 1 Motor Terminal Box and SYS 2 to termi...

Страница 18: ...ly with contacts shown install a cycling device in series with the Zone Thermostats See Note 3 for contact rating and wiring specifications 5 To stop unit Emergency Stop with contacts other than those...

Страница 19: ...e sup pressed with YORK P N 031 00808 000 suppressor across the relay contactor coil which activates the contacts CAUTION Control wiring connected to the control panel should never be run in the same...

Страница 20: ...1HTR COMPR CRANKCASE HEATER 2HTR SYS NO 1 NO 2 3HTR COOLER HEATER 1LDSV1 UNIT IDENT COMPR 1LDSV2 LOADING SOLENOID VALVE SYS NO 1 2LDSV1 UNIT IDENT COMPR 2LDSV2 LOADING SOLENOID VALVE SYS NO 2 1LLSV LI...

Страница 21: ...FORM 195 26 NM3 YORK INTERNATIONAL 21 FIG 7 CONTINUED COMPRESSOR SYSTEM NO 2 COMPRESSOR SYSTEM NO 1 LD00851 LD00852...

Страница 22: ...2 200 THRU 202 ARE NOT SUPPLIED LEGEND 1CT 2CT CURRENTTRANSFORMERS 3FU 4FU TRANSFORMER FUSE OPTIONAL 1FU CONTROL FUSE 20A 2FU CONTROL FUSE 5A 1M 4M COMPRESSOR CONTACTORS 5 6M CONDENSER FAN CONTACTOR S...

Страница 23: ...FORM 195 26 NM3 YORK INTERNATIONAL 23 CONNECTION DIAGRAM ELEMENTARY BOX FIG 8 CONNECTION DIAGRAM CONTINUED LD00847 D2...

Страница 24: ...stats Compressor starting stopping and loading unloading decisions are performed by the Microprocessor to main tain system suction pressure These decisions are a function of suction pressure deviation...

Страница 25: ...or sends AC signals proportional to motor current to the Power Sup ply Board which rectifies and filters the signal to vari able DC voltage analog This analog level is then fed to the Microprocessor B...

Страница 26: ...11 CONTROL PANEL INTERIOR 26572A 26573A KEYPAD MICROPROCESSOR BOARD TB3 POWER SUPPLY BOARD 2T TRANSFORMER RELAY OUTPUT BOARD 1 LOCATION OF OPTIONAL RELAY OUTPUT BOARD 2 MICROPROCESSOR TB3 CONNECTIONS...

Страница 27: ...yed If a message is required to be updated faster than ev ery 2 seconds the appropriate key for the desired dis play may be pushed and held Updating will be at 4 second intervals Each of the keys and...

Страница 28: ...ed by the S1 Dip Switch on the Microprocessor Board Fig 13 Proper programming of the switch is important during commissioning of the chiller The OP TIONS display allows a means of verifying the Dip Sw...

Страница 29: ...C O N T R O L C O N T R O L 5 E N G L I S H U N I T S M E T R I C U N I T S R E A D O U T R E A D O U T 6 S T A N D A R D C O N D E N S E R S H A R E D C O N D E N S E R F A N C O N T R O L F A N C O...

Страница 30: ...ill have no effect on the operation of the chiller Suction pressure control is standard SWITCH 5 OPEN Display messages will show units of measure in En glish units F PSI etc CLOSED Display messages wi...

Страница 31: ...circumstances SWITCH 8 OPEN Fan control will be by outside ambient temp This will be the standard mode of fan control for normal opera tion In this mode maximum chiller efficiency will be achieved If...

Страница 32: ...ample displays indicate numerical values will appear in actual displays This message informs the operator that the UNIT switch on the Control Panel is in the OFF position which will not allow the chil...

Страница 33: ...al high pressure cut out Reloading will take place when discharge pressure has dropped 60 PSIG below the threshold Optional discharge pressure transducers must be in stalled for this feature to operat...

Страница 34: ...H S Y S 2 H I G H D S C H S Y S 1 L O W O I L P R E S S S Y S 2 L O W O I L P R E S S S Y S 1 L O W S U C T I O N S Y S 2 L O W S U C T I O N S Y S 1 M O T O R C U R R E N T S Y S 2 M O T O R C U R R...

Страница 35: ...e following 4 keys is pressed 1 4 7 2 5 8 0 3 6 9 ENTER 26572A D PROGRAM SET SCHEDULE HOLIDAY ENTRY KEYS OPER DATA HISTORY Cancel Key The CANCEL key allows the user to change errors in the data being...

Страница 36: ...l accept for each limit THESE VALUES MUST BE CHECKED AND PROPERLY PRO GRAMMED WHEN COMMISSIONING THE CHILLER FAILURE TO PROPERLY PROGRAM THESE VALUES MAY CAUSE DAMAGE TO THE CHILLER OR OPERA TION PROB...

Страница 37: ...n occur when temperature drops below the cut out This only applies to outdoor air cooled chillers This cut out is normally set at 130 0 F to allow opera tion to the absolute maximum temperature capabi...

Страница 38: ...of time toler able Although 300 seconds is adequate motor cooling time longer periods will allow even more heat dissipa tion reduce cycling and possibly increase motor life A N T I R E C Y C L E T I M...

Страница 39: ...ll be dis played when the SET TIME key is pressed To program the day the time and the date first press the ADVANCE DAY key until the appropriate day of the week is displayed The day will advance each...

Страница 40: ...d use the ADVANCE DAY KEY not the ENTER KEY This will assure that after viewing MONDAY that the ENTER KEY is not pressed changing times programmed for the rest of the week If the chiller is not cycled...

Страница 41: ...key is pressed the Daily Schedule programmed into the chiller will be ig nored and the chiller will start up when water tempera MANUAL OVERRIDE ture allows unit switch permits and system switches perm...

Страница 42: ...out of the Control Zone Fig 14 and will continue to execute these commands until pressure is brought back into the Contol Zone The Control Zone is the range of suction pressures which is acceptable by...

Страница 43: ...the un loading capability These 4 steps include in the proper order of sequencing 1 Compressor unloaded 2 Compressor with 1 step of unloading 3 Compressor with 2 steps of unloading 4 Compressor with...

Страница 44: ...bove the Control Zone Fig 17 FIG 17 ABOVE THE CONTROL ZONE Loading Timer This 150 sec timer constantly cycles from 150 sec to 0 and restarts at 150 Loading will occur in 150 sec intervals whenever the...

Страница 45: ...on will take place in this pressure range In some cases the timer may be be low 30 sec on the transtion In these cases the timer will transition back to 60 sec and restart SUCTION PRESSURE PSIG CONTRO...

Страница 46: ...egins monitoring motor current after 3 sec onds of operation If motor current is exceeding 120 FLA at the 3 second point the compressor will shut down After 4 seconds of operation motor current must b...

Страница 47: ...r Protector Three internal temperature sensors are built into the motor stator These sensors are wired into the motor protector module located inside the Motor terminal box As the motor windings heat...

Страница 48: ...the High Ambient Temperature Fault display message is shown below Under Voltage Safety The Under Voltage Safety assures that the system is not operated at voltages where malfunction of the mi croproc...

Страница 49: ...opened and the compressor is in the midst of stopping An example of the message displayed when discharge pressure unloadings in effect is shown below INTERNAL TIMERS AND PUMPDOWN CONTROLS ANTI RECYCLE...

Страница 50: ...rinter or local data retrieval will follow An optional printer Page 72 will be required for remote printout REMOTE PRINTOUT Oper Data The OPER DATA key allows the operator to remotely obtain a printou...

Страница 51: ...fer storage area for data related to each of the last 3 safety shutdowns The printout will begin with the most recent fault which occured The most recent fault will always be stored as SAFETY SHUTDOWN...

Страница 52: ...g on the SYS 2 UnloadTimer The Unload Timer is a constantly recycling timer that the micro utilizes in conjunction with rate control and temperature deviation from setpoint to determine when unloading...

Страница 53: ...m problem This data reflects sys tem conditions at the instant the fault occcured Information is stored in the SAFETY SHUTDOWN Buff ers on every fault regardless of whether the fault caused a Lockout...

Страница 54: ...ssage indicates SYS 1 discharge pressure at the time of the fault This display will be a fixed value unless the Discharge Pressure Readout is installed This display shows the oil pressure of SYS 1 at...

Страница 55: ...OFF at the time of the fault This message informs the operator if SYS 2 Run Per missive flow switch remote START STOP was in the RUN mode ON or STOP mode OFF This message indicates the number of stag...

Страница 56: ...ever a fault shutdown occurs on any system or if power is lost to the control panel The dry contacts are normally open N O and will close when control power is applied to the panel if no fault conditi...

Страница 57: ...ult in the chiller not starting due to the time frozen on the clock falling outside the START STOP time window that is programmed in the DAILY SCHEDULE If the chiller is shut down for extended periods...

Страница 58: ...ever appear it will require the RTC Chip U13 on the Mi croprocessor Board Fig 13 to be replaced Care should be taken to assure that the chip is properly installed Pin 1 dimple in the top of the chip...

Страница 59: ...AN CONTROL STRATEGY ABOVE 25 F AMBIENT The chiller is equipped with 2 condenser fans The stan dard fan control strategy is fan cycling by outdoor ambi ent temperature with the low ambient cut out chil...

Страница 60: ...the top of the unloader piston forcing it down against spring pressure The bottom end of the piston seats against the recessed opening to the suction plenum effectively blocking the flow of suction g...

Страница 61: ...ure 115VAC Control Power to TB1 has 30A minimum capacity See Fig 10 9 12 Be certain all 2 control bulbs are inserted com pletely in their respective wells and are coated with heat conductive compound...

Страница 62: ...has become thoroughly familiar with the control panel and has performed the preceeding checks 24 hours prior to start up the unit can be put into operation 9 Place the System Switches to the ON posit...

Страница 63: ...re at the liquid stop valve and converting it to a tempera ture from the temperature pressure chart Example LIQUID LINE PRESSURE 202 PSIG converted to 102 F Minus Liquid Line Temperature 87 F Subcooli...

Страница 64: ...l as check to see if any system safeties are exceeded If all conditions allow for start the compressor will start unloaded Coincident with the start the programmable anti recycle timer will be set and...

Страница 65: ...reasonable length of operating time Discoloration of the oil either turning darker brown or in some cases lighter is an indication of con tamination basically due to moisture If it is nec essary to c...

Страница 66: ...Then open the oil charging valve and pump oil into the crankcase to the proper level It is necessary that the suction end of the hand oil pump be kept submerged under the oil level in the container at...

Страница 67: ...e condenser when the ambient temperature is in the 0 to 25 F range This assures that adequate discharge pressures can be maintained at low temperatures which will eliminate low suction pressure faults...

Страница 68: ...PSIG the ambient temperature exceeds 35 F or discharge pressure of the system rises above 340 PSIG NOTE The corresponding compressor must be on for minimum of 4 sec before the reversing fans are perm...

Страница 69: ...step of compressor cylinder unloading by introducing an arti ficial load on the cooler It provides steadier suction pressure at minimum load conditions by keeping the compressor on line rather than le...

Страница 70: ...reasing load Even though suction pressure may require energizing or de energizing the Hot Gas Solenoid will only take place after the initial timers for loading and unloading are satisfied The amount...

Страница 71: ...eration A sun shield is also installed on the control panel to prevent direct sunlight from overheat ing the control panel causing subsequent malfunction of the electro mechanical and electronic compo...

Страница 72: ...anta Rosa CA 95402 Phone 1 800 358 9110 or 1 707 527 5555 International Orders Only NOTE The print out is made to be universal to all types of chillers both air and water cooled with or without option...

Страница 73: ...he HISTORY key A print out show ing the last 3 faults with all system conditions at the time of the fault will be transmitted A sample print out is shown in Fig 20 on page 51 An automatic print out wi...

Страница 74: ...t FIG 32 PARTS LIST NOTE Field modifications may need to be made to the grilles to accomodate piping FIG 33 WIRE GRILLE INSTALLATION PART ITEM QTY DESCRIPTION 026 32301 000 4 1 Grille Top L H 026 3230...

Страница 75: ...d where parts of the kits interfere Touch up ex posed metal parts to prevent rust Parts List PART ITEM QTY DESCRIPTION 021 16161 000 2 18 Screw Cap Hex 1 4 20 021 16128 000 3 18 Lock WasherTH INT1 4 0...

Страница 76: ...NSTALLATION LD00586 LD00587 NOTES 1 Remove heaader covers discard 2 Attach Items 20 21 25 38 39 40 41 before attaching louver panels NOTE Field modifications may need to be made to the louvered panels...

Страница 77: ...tacts and contactor 3 Faulty high voltage wiring 3 Check wiring 4 High motor current stored in memory 4 Loose calibration resistors in J9 SYS 1 OR J10 SYS 2 of power supply board 5 Defective current t...

Страница 78: ...l level should be visible in either sight glass Oil Level at all times Add YORK C oil if necessary Particularly on 2 Excessive flood back of liquid 2 Adjust Thermal Expansion Valve TXV or replace star...

Страница 79: ...FORM 195 26 NM3 YORK INTERNATIONAL 79 LD00643...

Страница 80: ...Olympic Team 36USC380 P O Box 1592 York Pennsylvania USA 17405 1592 Subject to change without notice Printed in USA Copyright by York International Corporation 1997 ALL RIGHTS RESERVED Form 195 26 NM3...

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