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York YCAQ10 Manual

York YCAQ10 Manual

Packaged liquid chillers
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INSTALLATION, OPER., MAINT.
YCAQ10, YCAM12, YCAK14, YCAI16, YCAG18, YCAR11, YCAN13,
YCAM12, YCAK14, YCAI16, YCAG18, YCAN13, YCAL15, YCAJ17, YCAH19 with following EPROMS:*
BEFORE MAY 1, 1987
LCH130W
LCH130A
LCH150W
LCH150A
LCH175W
LCH175A
LCH200W
LCH200A
LCH230W
LCH230A
AIR COOLED – RECIPROCATING HERMETIC
Supersedes: 150.40-NM25 (389)
MODELS
YCAL15, YCAJ17 & YCAH19
STYLE D
YCAQ10 & YCAR11with following EPROMS:*
Standard Unit – GEII.4 Rev. 2
Brine Unit – GEII.4 BR Rev. 1
Metric Unit – GEII.4 M Rev. 1
Standard Unit – GEII.5 Rev. 2
Brine Unit – GEII.5 BR Rev. 1
Metric Unit – GEII.5 M Rev. 1
*Must be used with 031-00805 Rev. C Micrologic Board.
CROSS-REFERENCE CHART – NOMENCLATURE
EFFECTIVE MAY 1, 1987
YCWK11, YCWL12
YCRK00, YCRL00
YCWM13, YCWN14
YCRM00, YCRN00
YCWU19, YCWV20
YCRU00, YCRV00
YCWQ15, YCWR16
YCRQ00, YCRR00
YCWS17, YCWT18
YCRS00, YCRT00
PACKAGED LIQUID CHILLERS
Form 150.40-NM25 (597)
00013TG
EFFECTIVE JAN., 1990
YCWJ45PR0, YCWJ56PR0
YCRJ45PO0, YCRJ56PO0
YCWJ56RS0, YCWJ67RS0
YCRJ56RO0, YCRJ67RO0
YCWJ67TT0, YCWJ78TT0
YCRJ67TO0, YCRJ78TO0
YCWJ77VU0, YCWJ88VU0
YCRJ77VO0, YCRJ88VO0
YCWJ88XV0, YCWJ99XV0
YCRJ88XO0, YCRJ99XO0

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Summary of Contents for York YCAQ10

  • Page 1 AIR COOLED – RECIPROCATING HERMETIC INSTALLATION, OPER., MAINT. Form 150.40-NM25 (597) Supersedes: 150.40-NM25 (389) MODELS YCAQ10, YCAM12, YCAK14, YCAI16, YCAG18, YCAR11, YCAN13, YCAL15, YCAJ17 & YCAH19 STYLE D 00013TG YCAQ10 & YCAR11with following EPROMS:* Standard Unit – GEII.4 Rev. 2 Brine Unit –...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS YCAM12, YCAN13 YCAK14, YCAL15 YCAQ10, YCAI16, YCAJ17 YCAR11 YCAG18, YCAH19 Nomenclature ..............General Information ............Dimensions ..............Physical Data ..............Installation ..............Unit Controls and Operation .......... 10 Wiring Diagram ............. 10 Start-Up ................. 34 Operating Sequence ............35 Preventive Maintenance ..........

  • Page 3: General Information

    M12, N13 K14, L15 I16, J17 G18, H19 *0° (–17.8°) With Optional Low Ambient Kit. NOTE: The evaporator is protected against freeze-up to –20°F (–28.9°C) with an electrical heater cable. 00014TG FIG. 1 – COOLER WATER PRESSURE DROP YORK INTERNATIONAL...

  • Page 4: Dimensions

    DIMENSIONS YCAQ10, YCAR11 LD01731 NOTES: 1. Clearances – Minimum YORK required clearances to prevent condenser air recirculation and faulty operation of units are as follows: Side to wall 8'-0"* Rear to wall 8'-0"* Control Panel End to wall 5'-0"* Top 50'-0" Distance Between Adjacent units 12'-0"...
  • Page 5 YCAI16, YCAJ17, YCAG18, YCAH19 LD01726 NOTES: 1. Clearances – Minimum YORK required clearances to prevent condenser air recirculation and faulty operation of units are as follows: Side to wall 8'-0"* Rear to wall 8'-0"* Control Panel End to wall 5'-0"* Top 50'-0"...

  • Page 6: Physical Data

    6,760 10,080 11,150 12,115 13,840 SHIPPING COPPER FINS 8,435 11,980 12,650 15,115 17,340 WEIGHTS (LBS.) ALUM FINS 7,000 10,400 11,540 12,505 14,500 OPERATING COPPER FINS 8,675 12,300 13,040 15,505 18,000 SYS.1 REFRIG. CHARGE (LBS.) R-22 SYS. 2 – YORK INTERNATIONAL...

  • Page 7: Installation

    The location or Vibration Mounting & Controls, Inc. should be selected for minimum sun exposure and to insure an adequate supply of fresh air for the condenser. *Four (4) on YCAQ10, R11 YORK INTERNATIONAL...
  • Page 8 402 407 407 403 404 405 407 402 YCAG18, H19 2-27 2-32 4-28 2-31 2-28 2-32 4-27 2-28 LD01624 YCAQ10, R11 YCAM12, N13, K14, L15, I16, J17, G18, H19 COMPRESSOR MOUNTING The compressor(s) are mounted on four (4) isolator pads mounting bolts are not to be loosened or adjusted at (one under each compressor foot).
  • Page 9 7. A chilled water flow switch, (either by YORK or oth- der to receive maximum operating efficiencies. Piping ers) must be installed in the leaving water piping of should be kept as free as possible of all foreign matter.

  • Page 10: Unit Controls And Operation

    UNIT CONTROLS & OPERATION YCAQ10 and YCAR11 (SINGLE CIRCUIT UNITS) LD01711 FIG. 4 – WIRING DIAGRAM – YCAQ10 and YCAR11 YORK INTERNATIONAL...
  • Page 11 FORM 150.40-NM25 (SINGLE CIRCUIT UNITS) LD01712 ELEMENTARY DIAGRAM FIG. 4 – CONTINUED YORK INTERNATIONAL...
  • Page 12 (SINGLE CIRCUIT UNITS) FIG. 4 – CONTINUED CONNECTION DIAGRAM – ELECTRICAL BOX LD01713 YORK INTERNATIONAL...
  • Page 13 FORM 150.40-NM25 (SINGLE CIRCUIT UNITS) LD01714 CONNECTION DIAGRAM – SYSTEM WIRING FIG. 4 – CONTINUED YORK INTERNATIONAL...
  • Page 14 YORK RECIP MICROCOMPUTER CONTROL CENTER SINGLE CIRCUIT UNITS LD01777 FIG. 5 – CONTROL CENTER – SINGLE CIRCUIT UNITS (STANDARD ENGLISH MODELS) YORK INTERNATIONAL...
  • Page 15 FORM 150.40-NM25 SINGLE CIRCUIT UNITS WATER COOLING RANGE °C SELECT LD01777(R) FIG. 6 – CONTROL CENTER – SINGLE CIRCUIT UNITS (OPTIONAL ENGLISH MODELS) YORK INTERNATIONAL...
  • Page 16 SINGLE CIRCUIT UNITS INTRODUCTION DIGITAL INPUT BOARD (Optional) The YORK MicroComputer Control Panel is a micropro- This board allows use of optional remote cycling and cessor based control system. The microprocessor con- remote chilled water temp. select. These remote inputs...
  • Page 17 FORM 150.40-NM25 FIG. 7 – CONTROL & POWER PANEL FIG. 8 – CONTROL PANEL (EXTERIOR) FIG. 9 – POWER PANEL FIG. 10 – CONTROL PANEL (BACK SIDE) FIG. 11 – CONTROL PANEL INTERIOR 00017TG YORK INTERNATIONAL...
  • Page 18 RLA current. 13. Spare Which is typical current draw under normal running 14. Spare conditions. FLA is approx. 1.2 x RLA. 15. Spare 16. Suction pressure cutout setting, PSIG (kPaG x 10) 17. Spare 18. Fault code YORK INTERNATIONAL...
  • Page 19 These are devices whose dry contacts may be connected in series across ter- *See page 23 for details on the Anti-Recycle Timers. minals 3 and 4 of the terminal block in the lower left side of the Power Section. YORK INTERNATIONAL...
  • Page 20 This Spare can provide valuable troubleshooting information. De- High ambient temperature tailed explanations of all system safeties will follow in Low ambient temperature this section. Low water temperature YORK INTERNATIONAL...
  • Page 21 < 1.2VDC (< 24% FLA) or > 4.6VDC at 44 PSIG (303 kPaG). If Glycol or Brine is utilized, ( > 115% FLA) when Run Time > 4 sec. This protection then the cutout can be varied according to mixture. YORK INTERNATIONAL...
  • Page 22 R2 390 PSIG (2687 kPaG), the Micro Board will not al- on the Combo Board, the unit shuts down. Typically with low loading or will unload the compressor. It will auto- YORK INTERNATIONAL...
  • Page 23 See EMS/BAS Option in OPTIONS selected. **The GEII.4 REV.2 may also be labeled GEII.4S REV.2. The two section for more information. EPROMs are identical. YORK INTERNATIONAL...
  • Page 24 8.5 sec. will result in an offset of 15°F (8.33°C). This raises the RWT setpoint to 40°F YORK can supply an alarm kit whose contacts will tran- (4.4°C). Note: Metric Offset = 1.11 (time closed - 1 sec.).
  • Page 25 *Leaving water temperatures below 15°F are not permitted, regard- + 1.6°F less of whether leaving or return water temperature control is se- lected. + 1.8°F **The GEII.4 REV.2 may also be labeled GEII.4S REV.2. The two + 1.9°F EPROMs are identical. + 2.0°F YORK INTERNATIONAL...
  • Page 26 E. Place the two Setpoint Switches to the “Computed Setpoint”. (See Fig. 19.) WATER COOLING RANGE CODE 3.4°C i.e.: 7,1 = 7.1°C from Step C if SW1 on the Micro 3.9°C Logic Board is ON (Step C). 4.4°C 5.0°C 5.6°C 6.1°C 6.7°C 7.8°C YORK INTERNATIONAL...
  • Page 27 Code “4” = 5.6°C from Step B (See Fig. 20) Follow the steps below to set up the panel switches prior to operating the chiller. NOTE: YORK does not recommend utilizing LWT Con- trol with single circuit units, as cycling and tem- perature fluctuations may result.
  • Page 28 E. Set the Cooling Range Switch to the coded number which represents the desired cooling range selected in Step B. i.e.: Code “3” = ± 0.84°C from Step B. (See Fig. 23). LD01862 FIG. 23 – COOLING RANGE SWITCH SET AT 3 (0.84°C) YORK INTERNATIONAL...
  • Page 29 SWITCH = 2 Loader Stage 3 Setpoint plus 0.7°F (.38°C) Setpoint Loader Stage 2 Setpoint Setpoint minus 0.7°F (.38°C) COOLING RANGE Compressor Stage 1 Setpoint minus 0.7°F (.38°C) Setpoint minus 1.4°F (.77°C) OF +1.4°F ( +.78°C) (Continued next page) YORK INTERNATIONAL...
  • Page 30 Setpoint plus 1.0°F (.55°C) SWITCH = 7 Loader Stage 3 Setpoint plus 1.0°F (.55°C) Setpoint Loader Stage 2 Setpoint Setpoint minus 1.0°F (.55°C) COOLING RANGE Compressor Stage 1 Setpoint minus 1.0°F (.55°C) Setpoint minus 2.0°F (1.11°C) OF +2.0°F (+1.11°C) YORK INTERNATIONAL...
  • Page 31 The “dot” can be misleading when identifying switch position. See the “Side View” drawings for recommended position veri- fication. ** The GEII.5, REV. 2 may also be labled GEII.5S, REV.2. The two EPROMs are identical. EPROM 00009TG(R) FIG. 25 – MICRO LOGIC BOARD (STANDARD ENGLISH UNITS) YORK INTERNATIONAL...
  • Page 32 See the “Side View” drawings for recommended position veri- fication. ** Micro Logic Boards for Standard, Brine and Metric duty are identi- cal. Only the EPROMs are changed. EPROM 00009TG(R) FIG. 26 – MICRO LOGIC BOARD (OPTIONAL METRIC UNITS) YORK INTERNATIONAL...
  • Page 33 If it is neces- TIAL START-UP (NO POWER) sary to add oil, connect a YORK oil pump to the oil charging valve, but do not tighten the flare nut on 1. Unit Checks the delivery tubing.

  • Page 34: Start-Up

    50°F (10°C), clear oil in the com- eration of the chiller has been established, the leaving chilled liquid has been pulled down to the required tem- * See Fig. 7 ** See Fig. 9 YORK INTERNATIONAL...

  • Page 35: Operating Sequence

    “Options” Section, Page 85. Standard fan operation pressor will start (unloaded). If a safety is tripped or and fan placement are shown at the top of page 36. YORK INTERNATIONAL...
  • Page 36 50 HZ. suction pressure faults. Do not perform any YCAQ10, R11 modifications unless no system problems exist It is also advisable to consult YORK FIG. 28 – YCAQ10, R11 COMPRESSOR Factory Service before changes are made. UNLOADING SEQUENCE YORK INTERNATIONAL...

  • Page 37: Preventive Maintenance

    1. All items listed under WEEKLY MAINTENANCE. occurs due to improper maintenance during the warranty period, YORK will not be liable for costs incurred to re- 2. Operating Controls – Check to see if controls are set turn the system to satisfactory operation. The following and operating within the proper limits.
  • Page 38 H. If the oil is clean and free of metal particles, refill port on valve stem side of valve.) With the vacuum the compressor with YORK oil “C”. To add oil or to line shut-off valve open, run the vacuum pump until fill the compressor crankcase, connect the delivery a vacuum of at least 1000 microns is reached.

  • Page 39: Trouble-Shooting Chart

    F2 Fault Code 1. Low Oil Charge 1. Oil level should be visible in either sight Low Oil Pressure Fault glass at all times. Add YORK “C” oil if necessary. 2. Too much refrigerant in oil, 2. Check Crankcase Oil heater operation.
  • Page 40 10. Faulty wiring to Transducer 10. Check wiring 11. Defective Relay Output Board 11. Replace Relay Output Board (Contact the local YORK service representative.) 12. Defective Combo Board 12. Replace Combo Board (Contact the local YORK service representative.) 13. Defective Micro Board 13.
  • Page 41 Low Compressor Oil 1. Low Oil Charge 1. Oil level should be visible in either Level (Particularly on sight glass at all times. Add YORK Start-Up.) “C” oil if necessary. 2. Excessive Flood back of Liquid 2. Adjust Thermal Expansion Valve (TXV) Refrigerant or Replace Power Element.
  • Page 42 UNIT CONTROLS & OPERATION YCAM12, YCAN13, YCAK14, YCAL15, YCAI16, YCAJ17, YCAG18, YCAH19 (DUAL CIRCUIT UNITS) ELEMENTARY DIAGRAM LD01715 FIG. 29 – WIRING DIAGRAM – YCAM12, N13, K14, L15, I16, J17, G18, H19 YORK INTERNATIONAL...
  • Page 43 FORM 150.40-NM25 DUAL CIRCUIT UNITS ELEMENTARY DIAGRAM LD01716 FIG. 29 – (CONTINUED) YORK INTERNATIONAL...
  • Page 44 DUAL CIRCUIT UNITS LD01717 CONNECTION DIAGRAM – ELECTRICAL BOX FIG. 29 – (CONTINUED) YORK INTERNATIONAL...
  • Page 45 FORM 150.40-NM25 DUAL CIRCUIT UNITS LD01718 CONNECTION DIAGRAM – SYSTEM WIRING FIG. 29 – (CONTINUED) YORK INTERNATIONAL...
  • Page 46 DUAL CIRCUIT UNITS YORK RECIP. MICROCOMPUTER CONTROL CENTER FIG. 30 – CONTROL CENTER – DUAL CIRCUIT UNITS (STANDARD ENGLISH MODELS) YORK INTERNATIONAL...
  • Page 47 FORM 150.40-NM25 DUAL CIRCUIT UNITS FIG. 31 – CONTROL CENTER – DUAL CIRCUIT UNITS (OPTIONAL METRIC MODELS) YORK INTERNATIONAL...
  • Page 48 INTRODUCTION Board and provides system control through the Relay Output Board. The YORK MicroComputer Control Panel is a micropro- cessor based control system. The microprocessor con- DIGITAL INPUT BOARD (Optional) trols a 2 system (dual circuited) unit as needed to main- tain chilled water temperature.
  • Page 49 FORM 150.40-NM25 DUAL CIRCUIT UNITS FIG. 32 – CONTROL & POWER PANEL FIG. 33 – CONTROL PANEL (EXTERIOR) FIG. 34 – POWER PANEL FIG. 35 – CONTROL PANEL (BACK SIDE) FIG. 36 – CONTROL PANEL INTERIOR 00018TG YORK INTERNATIONAL...
  • Page 50 RLA current, which is typical cur- Oil pressure, PSID (kPaD x 10) rent draw under normal running conditions. FLA Discharge pressure, PSIG (kPaG x 10) is approx. 1.2 x RLA. Suction pressure cutout setting, PSIG (kPaG x 10) Optional Fault code YORK INTERNATIONAL...
  • Page 51 The H code will override c, d, or E code. restart when the 2-minute start-up and 10-minute anti-recycle timers time out, and demand allows. *See Page 55 for details on the anti-recycle timers. The “c” code will disappear as soon as the timers time out.* YORK INTERNATIONAL...
  • Page 52 De- Low suction pressure, PSIG (kPaG x 10) tailed explanations of all system safeties will follow in Micro detected high pressure cutout High ambient temperature this section. Low ambient temperature Low water temperature YORK INTERNATIONAL...
  • Page 53 Analog signals are sent to the Analog Input Board then is in effect. After 3 faults, an “F” code will be displayed to Micro Board from the suction and oil pressure trans- and the system will lockout and not restart. The fault YORK INTERNATIONAL...
  • Page 54 2-minute delay has passed. An “F9” applied. Restart is dependent on cooling demand code will be displayed while the temperature is high. The after the 2 minute start-up timer has completed its “F” will automatically disappear when temp. drops be- cycle. low cutout. YORK INTERNATIONAL...
  • Page 55 71 & 72 on TB8 must be jumpered or an “A” code will result and the compressors will not run. See ANTI RECYCLE TIMER EMS/BAS Option in “OPTIONS” Section for more in- Any time a compressor shuts down for any reason, re- formation. YORK INTERNATIONAL...
  • Page 56 A 110VAC or 28VDC volt external alarm circuit (by oth- ers) must be wired into the YORK supplied alarm cir- cuit. If the alarm circuit is applied to chillers used for...
  • Page 57 “SYS 1 LEAD/LAG’’ Select to which system (system with least run time) is to be put in the lead. This switch allows the operator to select SYS 1 as the YORK INTERNATIONAL...
  • Page 58 Range Code on the WATER COOLING RANGE of loading. Contact YORK Sales for this option. SWITCH (center rotary switch, Fig. 43). Set SW5 on the Micro Logic Board for the proper num- NOTE: These codes are not listed on the control panel ber of stages (standard 4 or optional 5, 6, 7, or 8).
  • Page 59 E. Place the two setpoint switches to the “computed” 3.9°C setpoint. (See Fig. 44) 4.4°C i.e.: 7,1 = 7.1°C from Step C if SW1 on the Micro 5.0°C Logic Board is ON (Step C). 5.6°C 6.1°C 6.7°C 7.8°C YORK INTERNATIONAL...
  • Page 60 Code “4” = 5.6°C from Step B (See Fig. 45) Follow the steps below to set up the panel switches prior to operating the chiller. NOTE: YORK does not recommend utilizing LWT Con- trol unless 6-8 stages of optional unloading are present. Otherwise cycling and temperature fluc- tuations may result.
  • Page 61 E. Set the Cooling Range Switch to the coded number which represents the desired cooling range selected in Step B. G. See pages 63-65 for determining loading and unload- i.e.: Code “3” = ± 0.84°C from Step B. (See Fig. 48) ing points. YORK INTERNATIONAL...
  • Page 62 **If optional 6 or 7 stage loading/unloading is included, Stage 3 loading and unloading is not included on one or both compressor. Therefore, in the example above, no system response will take place on loading at 50°F (10.0°C) and/or 55°F (12.8°C) and no system response will take place on unloading at 53.75°F (12.1°C) and 48.75°F (9.3°C). YORK INTERNATIONAL...
  • Page 63 Lead Compr. Loader Stage 3 Setpoint minus 0.2°F (.11°C) Setpoint minus 0.7°F (.38°C) Lead Compr. Loader Stage 2 Setpoint minus 0.5°F (.27°C) Setpoint minus 1.1°F (.61°C) Lead Compressor (Stage 1) Setpoint minus 1.0°F (.55°C) Setpoint minus 1.6°F (.88°C) YORK INTERNATIONAL...
  • Page 64 Lag Compressor (Stage 1) Setpoint plus 0.5°F (.27°C) Setpoint COOLING RANGE Lead Compr. Loader Stage 2 Setpoint Setpoint minus 0.5°F (.27°C) OF ± 1.0°F (± .55°C) Lead Compressor (Stage 1) Setpoint minus 0.5°F (.27°C) Setpoint minus 1.0°F (.55°C) YORK INTERNATIONAL...
  • Page 65 Lag Compressor (Stage 1) Setpoint plus 1.0°F (.55°C) Setpoint COOLING RANGE Lead Compr. Loader Stage 2 Setpoint Setpoint minus 1.0°F (.55°C) OF ± 2.0°F (± 1.11°C) Lead Compressor (Stage 1) Setpoint minus 1.0°F (.55°C) Setpoint minus 2.0°F (1.11°C) YORK INTERNATIONAL...
  • Page 66 See the “Side View” drawings for recommended position verification. Manual Sys 1 lead/lag selection via Con- trol Panel (Standard as Shipped) **The GEII.5, REV.2 may also be labeled GEII.5S, REV.2. The two EPROMs are identical. EPROM 00009TG(R) FIG. 50 – MICRO LOGIC BOARD (W/STANDARD EPROM) YORK INTERNATIONAL...
  • Page 67 **Micro Logic Boards for Standard, Brine, and Metric duty are identi- ON: Manual Sys 1 lead/lag selection via Control cal. Only the EPROMs are changed. Panel (Standard as shipped). EPROM 00009TG(R) FIG. 51 – MICRO LOGIC BOARD (W/EPROM FOR OPTIONAL METRIC UNITS)** YORK INTERNATIONAL...
  • Page 68 If it is neces- sary to add oil, connect a YORK oil pump to the oil *See Fig. 32 charging valve, but do not tighten the flare nut on **See Fig.
  • Page 69 Correct superheat setting is 10°-12°F (5.5°-6.6°C). Allow the compressor to run for a short time, being YORK INTERNATIONAL...
  • Page 70 2 minute start-up timer. places the timer at T = 0 position. The compressors 4. At the end of the 2 minute timer, the 10 minute anti- will run as long as cooling demand exists. YORK INTERNATIONAL...
  • Page 71 4. 6 cyl. compressors are running motor currents below 29% when unloaded to 2 cylinders. The above conditions normally do not cause faulting however, due to certain environmental conditions, wa- ter/glycol flow rates and glycol concentrations, this al- teration may be required. LD01727 CONDENSER FAN LOCATIONS YORK INTERNATIONAL...
  • Page 72 YCAK14, L15 any modifications unless no system prob- SYS 1 lems exist. It is also advisable to consult SYS 2 YORK Factory Service before changes are YCAI16, J17 made. SYS 1 SYS 2 Fan cycling by discharge pressure can be accomplished...
  • Page 73 1. All items listed under WEEKLY MAINTENANCE. riod; YORK will not be liable for costs incurred to return the system to satisfactory operation. The following is 2. Operating Controls – Check to see if controls are set intended only as a guide and covers only the chiller unit and operating within the proper limits.
  • Page 74 YORK Hand Oil Pump, YORK Part No. vacuum of at least 1000 microns is reached. Stop 470-10654 or equal to the compressor oil charging the vacuum pump, close the shut-off valve and open and drain valve.
  • Page 75 F2 or F6 Fault Code 1. Low Oil Charge 1. Oil level should be visible in either sight Low Oil Pressure Fault glass at all times. Add YORK “C” oil if necessary. 2. Too much refrigerant in oil, 2. Check Crankcase Oil heater operation.
  • Page 76 10. Faulty wiring to Transducer 10. Check wiring 11. Defective Relay Output Board 11. Replace Relay Output Board (Contact the local YORK service representative.) 12. Defective Combo Board 12. Replace Combo Board (Contact the local YORK service representative.) 13. Defective Micro Board 13.
  • Page 77 Low Compressor Oil 1. Low Oil Charge 1. Oil level should be visible in either Level (Particularly on sight glass at all times. Add YORK Start-Up.) “C” oil if necessary. 2. Excessive Flood back of Liquid 2. Adjust Thermal Expansion Valve (TXV) Refrigerant or Replace Power Element.
  • Page 78 9. Defective Micro Board 9. Replace Micro Board (Contact the local YORK service representative) Lack of Cooling Effect 1. Fouled Evaporator Surface 1. Contact the local YORK service representative. 2. Faulty Compr. Suction and/or 2. Contact the local YORK service Discharge Valves representative.
  • Page 79 *Leaving water temperatures of below 15°F (–9.4°C) are not per- mitted, regardless of whether leaving or return water temperature Two reset ranges are available depending upon whether control is selected. the unit is equipped for standard or brine duty. YORK INTERNATIONAL...
  • Page 80 Board will take this as a signal to change the RWT setpoint back to the original setpoint of 25°F (–3.9°C) on the Control Panel. See Fig. 54, 55, and 56 for loca- tion and wiring to TB8. LD01629 FIG. 54 – COMPONENT LOCATION YORK INTERNATIONAL...
  • Page 81 FORM 150.40-NM25 SINGLE CIRCUIT UNITS LD01630 FIG. 55 – CONNECTION DIAGRAM THIS RESISTOR MUST BE REMOVED LD01712(D) FIELD WIRING CUSTOMER SUPPLIED DRY CONTACTS FROM BAS/EMS, FAX-4000, SWITCH, OR RELAY FIG. 56 – FIELD WIRING AND ELEMENTARY SCHEMATIC YORK INTERNATIONAL...
  • Page 82 This al- YORK INTERNATIONAL lows operator and service personnel to obtain data log- RECIP CHILLER ging and system status with the touch of a button. YORK MICRO CONTROL CENTER recommends the field tested Weigh-Tronix IMP-24, SYSTEM STATUS Model 2600 printer.
  • Page 83 The following components are required: Shell: Cannon p/n DB-C2-J9 1. Weigh-Tronix IMP-24, Model 2600 printer. 7. (1) 6-pin connector and (3) pins YORK p/n 025-19668 2. 2.25" wide desk top calculator paper. Connector: AMP p/n 1-480270-0 3. 25 ft. Twisted Pair Shielded Cable (minimum 3 con- YORK p/n 025-19674 ductor), #18 AWG Stranded, 300V min.
  • Page 84 Board. YORK assumes no responsibility for assistance or damage in the use of non-specified printers. Warranty YORK assumes no warranty responsibility in the use of the LD01879 printer. This includes damages to the printer and the Micro Logic Board or chiller operation problems that may result.
  • Page 85 SINGLE CIRCUIT UNITS ANNUNCIATION ALARM breaking the alarm circuit. A 28VDC or 120VAC exter- nal alarm circuit (by others) must be wired into the YORK An optional Annunciation Alarm Kit p/n 025-28396-101 supplied alarm contact. If the alarm circuit is applied to...
  • Page 86 Fans F or G & H ON Condenser Press < 210 PSI (1447 kPa) Fans D or A & B ON Fans A & B ON: Condenser > 300 PSI (1585 kPa) OFF: Condenser < 230 PSI LD01634 FIG. 61 – FAN CYCLING YORK INTERNATIONAL...
  • Page 87 *Leaving water temperatures of below 15°F (–9.4°C) are not per- point temperature desired must be set on the panel via mitted, regardless of whether leaving or return water temperature the “Chilled Water Temp. Select” rotary switches. Two control is selected. YORK INTERNATIONAL...
  • Page 88 “ON” position on the Micro Logic Board. (See Fig. 50.) on the Control Panel. See Fig. 62, 63, and 64 for loca- See Fig. 62, 63, and 64 for location and wiring to TB8. tion and wiring to TB8. LD01635 FIG. 62 – COMPONENT LOCATION YORK INTERNATIONAL...
  • Page 89 FORM 150.40-NM25 DUAL CIRCUIT UNITS FIG. 63 – CONNECTION DIAGRAM LD01636 COMBO BOARD THIS RESISTOR MUST BE REMOVED LD01712(D) FIELD WIRING CUSTOMER SUPPLIED DRY CONTACTS FROM BAS/EMS, FAX-4000, SWITCH, OR RELAY FIG. 64 – FIELD WIRING AND ELEMENTARY SCHEMATIC YORK INTERNATIONAL...
  • Page 90 RECIP CHILLER lows operator and service personnel to obtain data log- MICRO CONTROL CENTER ging and system status with the touch of a button. YORK recommends the field tested Weigh-Tronix IMP-24, SYSTEM STATUS Model 2600 printer. This is a compact, portable, low cost NO SYSTEM FAULTS printer that is ideal for service work and data logging.
  • Page 91 The following components are required: Shell: Cannon p/n DB-C2-J9 1. Weigh-Tronix IMP-24, Model 2600 printer. 7. (1) 6-pin connector and (3) pins YORK p/n 025-19668 2. 2.25" wide desk top calculator paper. Connector: AMP p/n 1-480270-0 3. 25 ft. Twisted Pair Shielded Cable (minimum 3 con- YORK p/n 025-19674 ductor), #18 AWG Stranded, 300V min.
  • Page 92 Board. YORK assumes no responsibility for assistance or damge in the use of non-specified printers. Warranty YORK assumes no warranty responsibility in the use of the printer. This includes damages to the printer and the LD01880 Micro Logic Board or chiller operation problems that may result.
  • Page 93 FORM 150.40-NM25 DUAL CIRCUIT UNITS ANNUNCIATION ALARM cuit (by others) must be wired into the YORK supplied An optional Annunciation Alarm Kit p/n 375-00309-000 alarm contacts. If the alarm circuit is applied to chillers can be supplied which contains a second relay output...
  • Page 94 Note: Each valve has an orifice which has The fundamental purpose of the Low Ambient Kit is to been sized to prevent liquid build-up in the inactive reduce the capacity of the condenser when the ambient portion of the condenser. YORK INTERNATIONAL...
  • Page 95 Press, PSI (2067 kPa) PSI (2067 kPa) OFF: Condenser Press PSI OFF: Condenser < 230 PSI (1585 kPa) (1585 kPa) *Fan “G” not present on all chillers. See Fig. 70 CONDENSER FAN LOCATIONS. LD01641 FIG. 70 – LOW AMBIENT FAN CONTROL YORK INTERNATIONAL...
  • Page 96 +276.8 -8.9 +60.8 +24.4 +168.8 +91.1 +196 +384.8 -8.3 +62.6 +25.0 +170.6 +58.3 +137 +278.6 +91.7 +197 +386.6 +58.9 +138 +280.4 -7.8 +64.4 +25.6 +172.4 +92.2 +198 +388.4 +59.4 +139 +282.2 -7.2 +66.2 +26.1 +174.2 +92.8 +199 +390.2 YORK INTERNATIONAL...

  • Page 97: Service Bulletins

    Step 2 should also note that the OAT sensor should be replaced with a 50 KW potentiometer. The pot should be adjusted to provide an OAT display of 15°F. Once the 15°F display is obtained, the potentiometer resistance may be measured and replaced with a fixed resistor. YORK INTERNATIONAL...
  • Page 98 Do not place this cover inside the power panel of the chiller when doing service. The coated surface could get against the chiller’s power lugs and cause a short circuit. Even worse is that the plastic could melt and ignite, creating a fire inside the power panel. YORK INTERNATIONAL...
  • Page 99 FORM 150.40-NM25 YORK INTERNATIONAL...
  • Page 100 Proud Sponsor of the 1998 U.S. 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 150.40-NM25 (597) Supersedes: 150.40-NM25 (397)

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