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York YDAJ87KU6 Manual
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York YDAJ87KU6 Manual

Recippak liquid chillers air cooled reciprocating hermetic 60/50 hz models/style a 370 - 450 tons
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00022TG

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Summary of Contents for York YDAJ87KU6

  • Page 1 00022TG...
  • Page 4 00023TG 00024TG...
  • Page 5 00025TG LD01910...
  • Page 6 27299A 27599A...
  • Page 7 LD01911 CAUTION: Excessive flow will cause damage to the cooler. Do not exceed max. cooler GPM. Special care should be taken when mul- tiple chillers are fed by a single pump.
  • Page 9 LD01912...
  • Page 10 (1-2) #4-250MCM (1-2) #4-250MCM DUAL MODEL VOLT- NON-FUSED MAX SIZE ELEMENT DISC SW CKT BKR FUSE SIZE DUAL POINT YORK SUPPLIED DISCONNECT CODE MIN SIZE HACR TYPE (CU ONLY) (CU ONLY) J87HU7 (1-3) #6-350MCM (1-2) #4/0-500MCM J87HU7 (1-3) #6-350MCM (1-2) #4/0-500MCM...
  • Page 11 UNIT CONTROL MIN CIRCUIT MAX DUAL NON-FUSED VOLTAGE POWER SUPPLY AMPACITY ELEMENT FUSE SIZE DISC. SW. SIZE Std. Models w/o Transformers 115-1-50/60 20A, 250V 30A, 240V...
  • Page 12 00020TG...
  • Page 13 NOTES: In the fall / winter of 1995, a design change will be implemented in the communications link to add transient protection circuit boards (LTP, Lan Transient Protection) to the RS-485 com- munications link. These boards are designed to protect the RS-485 drivers on the Micro Boards from severe RFI transients that may enter through earth ground and cause a cir- cuitry failure and subsequent communications...
  • Page 14 LD01915 LD01916 LD01917...
  • Page 15 LD01920 LD01918 LD01919 251 12A...

  • Page 16: Load Points

    MODELS LOAD POINTS ISOLATOR LD01921...
  • Page 17 LD01922...
  • Page 18 LD01923 WARNING: Flow switch must not be used to stop and start chiller. It is intended only as a safety switch.
  • Page 19 LD01924 LD01925...
  • Page 20 LD01926 LD01686(D) LD01927...
  • Page 21 Any contacts connected to flow switch inputs or BAS inputs on terminals 13-19 of TB3, or any other termi- nals, must be suppressed with a YORK P/N 031- 00808 suppressor across the relay/contactor coil which activates the con- tacts. CAUTION: Control wiring connected...
  • Page 22 LD01929 LD01930 LD01931...
  • Page 23 LD01932...
  • Page 24 LD01933...
  • Page 25 LD01934...
  • Page 26 LD01686(D) LD01935...
  • Page 27 Any contacts connected to flow switch inputs or BAS inputs on terminals 13-19 of TB3, or any other termi- nals, must be suppressed with a YORK P/N 031- 00808-000 suppressor across the relay/contactor coil which activates the contacts. CAUTION: Control wiring connected...
  • Page 28 LD01937 LD01938 LD01939...
  • Page 29 LD01940...
  • Page 30 LD01941...
  • Page 31 LD01942...
  • Page 32 26572A...
  • Page 33 25998A...
  • Page 34 00026TG 26000A...
  • Page 35 26572A(D) NOTE: The AMBIENT TEMP, OPTIONS and WATER TEMPERATURE keys will not display a sec- ond set of data.
  • Page 37 CAUTION: The switch positioning on the Slave Micro- processor Board MUST be identical to the Master for all switches but Switch 7 (Lead/ Lag) which may be different but it is not recommended. Otherwise, improper slave operation will result. Slave Microprocessor Board Switch positioning MUST and can only be done by visually comparing it to the Master Microprocessor Board.
  • Page 38 26001A LD01944 LD01943...
  • Page 40 NOTE: Discharge pressure transducers must be in- stalled. These are optional (Discharge Pressure Read-out Option) unless a Low Ambient Kit is installed.
  • Page 41 26572A(D)
  • Page 44 26572A...
  • Page 45 26572A NOTE: In some water cooled condenser installations, the possibility exists for the condenser water pump or the cooling tower to not be in opera- tion when the chiller starts. This causes the dis- charge pressure to rise so rapidly that even though the mechanical high pressure cut-out is shutting down the compressor, the flywheel ef- fect may cause the pressure to continue to rise...
  • Page 46 NOTE: It is required to first key in a “0” when program- ming this cut-out (Example: 0395 PSIG). NOTE: Operation below 0°F may cause other types of nuisance safety shutdowns, but occasional shutdowns can usually be tolerated since the need for sustained operation at these tempera- tures is unlikely and temperatures rarely stabi- lize for any length of time below 0°F.
  • Page 47 NOTE: When programming values from 80-99 PSIG, it is required to first key in a “0”. Example: 085 PSIG.
  • Page 48 NOTE: There are some exceptions, where suction pressure is permitted to temporarily drop be- low the cut-out point. Details are outlined in the SYSTEM SAFETIES section.
  • Page 49 26572A NOTE: The AM/PM key can only be pressed once. If an error is made, press the CANCEL key and begin again.
  • Page 50 NOTE: This will have no effect on the holiday schedule. NOTE: Only one start/stop time can be programmed which will apply to each of the “HOLIDAY” days selected.
  • Page 51 NOTE: Decreasing the RATE SENSITIVITY may be undesirable and may cause the system to pre- maturely go into rate control due to the micro sensing a transient temperature fluctuation and not allowing the chiller to load. This will cause the mixed leaving water temperature to rise above the desired setpoint.
  • Page 52 26572A...
  • Page 53 CAUTION: Too small of a CR selection will cause com- pressor / loader cycling. If compressor cy- cling occurs, leaving water temperature may vary considerably as a result of a com- pressor that cannot restart due to the antirecycle timer. To eliminate this, increase the D T (temperature differential) of the CR and / or program the anti-recycle timer for a minimum of 300 seconds.
  • Page 55 NOTE: When programming values between 0.1-9.9°F, it is required to first key in a “0” or “00”. Ex- ample: 0.5-9°F. NOTE: Too small of a RATE SENSITIVITY selection may prevent loading due to varying flows or if the water system allows a slug of cold water to enter which falsely fools the micro into thinking the RATE SENSITIVITY has been exceeded, preventing loading and allowing leaving water...
  • Page 56 NOTE: The micro’s control loading and unloading re- sponses on a 20 step scale regardless of the number of stages present. Therefore, loading and unloading responses on chillers with less than 10 steps per module may appear delayed (time between steps increased) when miss- ing steps are activated or de-activated by the micro.
  • Page 57 NOTE: Do not confuse FLA and RLA. FLA (full load amps) is approximately 1.2 x RLA. RLA (run- ning load amps) specified on the motor name- plate, is typical current demand under rated operating conditions in a fully loaded system. Therefore, do not expect to see 100% FLA when the system is fully loaded.
  • Page 58 NOTE: LLSV refers to liquid line solenoid valve. NOTE: This safety is only operable if optional discharge pressure transducers are installed.
  • Page 59 CAUTION: NEVER BYPASS A FLOW SWITCH. THIS WILL CAUSE DAMAGE TO THE CHILLER AND VOID ANY WARRANTIES.
  • Page 61 26572A NOTE: If a Weigh-Tronix printer is utilized, delays may be experienced during print-outs. This is a re- sult of the Master Microprocessor Board break- ing communications with the printer to permit communications with the Slave Microproces- sor Board. In some cases, depending upon tim- ing, a delay will be noted before the start of the print-out.
  • Page 62 YORK INTERNATIONAL CORPORATION RECIPROCATING WATER CHILLERS SYSTEM STATUS 5:24AM 1/02/95 SYS 1 COMPRESSOR RUNNING SYS 2 COMPRESSOR RUNNING SYS 3 COMPRESSOR RUNNING SYS 4 ANTI -RECYCYLE TIMER 119 SEC RETURN WATER TEMP 1 82.8 DEGF RETURN WATER TEMP 2 83.6 DEGF LEAVING WATER TEMP 1 60.1 DEGF...
  • Page 63 YORK INTERNATIONAL CORPORATION YORK INTERNATIONAL CORPORATION YORK INTERNATIONAL CORPORATION RECIPROCATING WATER CHILLERS RECIPROCATING WATER CHILLERS RECIPROCATING WATER CHILLERS SAFETY SHUTDOWN NUMBER 1 SAFETY SHUTDOWN NUMBER 2 SAFETY SHUTDOWN NUMBER 2 SHUTDOWN @ 5:18AM 1/02/97 SHUTDOWN @ 5:03AM 1/02/97 SHUTDOWN @ 4:58AM 1/02/97...
  • Page 68 NOTE: The micro will attempt to control the Hot Gas, Solenoid Valve regardless of whether the op- tion is installed.
  • Page 69 NOTE: The micro will attempt to control the Hot Gas Solenoid Valve regardless of whether the op- tion is installed.
  • Page 71 26572A NOTE: This message will not appear if Anti-recycle or Anti-coincident timers are in effect and are be- ing displayed. CAUTION: If the alarm circuit is applied in an applica- tion used for critical duty (such as process duty or cooling other critical equipment) and...
  • Page 72 26000A 26001A the alarm circuit should fail to function, YORK will not be liable for damages. LD01945...
  • Page 73 NOTE: ALL PROGRAMMED VALUES AND STORED DATA, OTHER THAN THE INTERNAL CLOCK TIME-KEEPING, WILL BE MAINTAINED IN MEMORY REGARDLESS OF WHETHER THE CLOCK IS ON OR OFF AND REGARDLESS OF THE LENGTH OF THE POWER FAILURE. LD01946 NOTE: It is advisable to select the same type of LEAD/ LAG control on both the Master and Slave Microprocessor Boards.
  • Page 74 NOTE: This verifies the positioning on the Master Mi- croprocessor Board only. The Slave Micropro- cessor Board must be checked visually. 26001A...
  • Page 75 NOTE: After an offset signal, the new setpoint may be viewed on the REMOTE RESET TEMP RANGE DISPLAY. However, if this display is being viewed when the reset pulse occurs, the setpoint will not change on the display. To view the new offset, first press any other display key on the keypad and then press the REMOTE RESET TEMP RANGE key.
  • Page 76 CAUTION: Two cautions should be observed when us- ing these functions. Observing these cau- tions will assure that undesirable operation does not result. 1. Terminals 13 & 17 contact should al- ways be closed after or simultaneous with those on 13 & 16, when unloading of the lead system is desired.
  • Page 77 LD01948...
  • Page 78 ¨ ¨ ¨ CAUTION: Compressor lubrication circuit must be primed with YORK “C” oil prior to start-up. Priming should be done through the ¨ Schrader fitting at the compressor oil pump. Stroke oil pump 10 times to prime the lubri-...
  • Page 79 ¨ NOTE: It is IMPORTANT that all switches are properly programmed. Otherwise, undesirable operation will result. ¨ ¨ ¨ ¨ ¨ ¨ ¨ ¨ ¨ ¨ ¨ ¨ ¨ ¨ ¨ ¨ ¨ ¨ ¨...
  • Page 80 ¨ ¨...
  • Page 81 NOTE: The operating sequence described below re- lates to operation after power has been ap- plied on a hot water start (such as start-up commissioning). Under these circumstances, loading will deviate from normal sequence and timing previously described. When a compres- sor starts, internal timers limit minimum time before another compressor can start to 1 minute.
  • Page 83 NOTE: If suction or discharge valves are not seated properly, a 1000 micron vacuum can not be ob- tained. Do not evacuate for long periods of time. LD01945...
  • Page 84 NOTE: Any inductive devices (contactor/relay coil) con- nected to these contacts must be suppressed with YORK P/N 031-00808 supplied by others. Otherwise, nuisance faults may occur. NOTE: Any inductive devices (contactor/relay coil) con- nected to these contacts must be suppressed with YORK P/N 031-00808 supplied by others.
  • Page 85 NOTE: The corresponding compressor must be on for a minimum of 4 sec. before the reversing fans are permitted to start. NOTE: The corresponding compressor must be on for 4 sec. before these fans are permitted to start. NOTE: The corresponding compressor must be on for 4 sec.
  • Page 87 NOTE: The microprocessor will only activate the hot gas on the lead compressor. Hot Gas Bypass will not operate and is not available on the Slave Module.
  • Page 88 LD01951...
  • Page 89 YORK INTERNATIONAL CORPORATION RECIPROCATING WATER CHILLERS SYSTEM STATUS 5:24AM 1/02/95 SYS 1 COMPRESSOR RUNNING SYS 2 COMPRESSOR RUNNING SYS 3 COMPRESSOR RUNNING SYS4 ANTI-RECYCLE TIMER 119 SEC RETURN WATER TEMP 1 82.8 DEGF RETURN WATER TEMP 2 83.7 DEGF LEAVING WATER TEMP 1 60.1 DEGF...
  • Page 90 NOTE: The print-out is made to be universal to all types of chillers, both air and water cooled with or without options. Items may be indicated on the print-out which may not be present on the chiller. LD01952...
  • Page 92 0001TG LD01953...
  • Page 93 LD01954...
  • Page 94 00028TG LD01955...
  • Page 95 CAUTION: THE 4-20mA INPUT SIGNAL WIRING MUST NOT BE EARTH GROUNDED! NOTE: The coil of the controls used for reset must be suppressed. Use YORK P/N 031-00808-000 suppressor. The Remote Setpoint Reset will not operate when a Remote Control Center Option is con- nected to the micro panel.
  • Page 96 3. Replace 2T. 4. No +12V output from Power Supply Board 4. Replace Power Supply Board or isolate excessive load on the board. Contact YORK Service Before Replacing Circuit Boards! “NO RUN PERM” 1. No flow. 1. Check chilled liquid flow.
  • Page 97 PROBLEM CAUSE SOLUTION “HIGH DSCH” Fault 1. Condenser fans not operating or rotating backwards. 1. Check fans, fuses, and contactors. Cuts out on High Discharge 2. Too much refrigerant. 2. Remove refrigerant. Pressure as sensed by 3. Air in Refrigerant System. 3.
  • Page 98 7. Defective evaporator or optional discharge transducer. 7. Replace transducer after verifying with a gauge. Lack of Cooling 1. Fouled evaporator surface. 1. Contact the local YORK service representative. Effect 2. Faulty compressor suction and/or discharge valves. 2. Contact the local YORK service representative.

  • Page 100: All Rights Reserved

    36USC380 P .O. Box 1592, Y ork, Pennsylvania USA 17405-1592 Subject to change without notice. Printed in USA Copyright © by York International Corporation 1997 ALL RIGHTS RESERVED Form 150.75-NM2 (196) Supersedes: 150.75-NM1 IN ERR ONLY...

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