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York YCAZ33BA3 Manual
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York YCAZ33BA3 Manual

Recippak liquid chillers air cooled reciprocating hermetic
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26195A

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Summary of Contents for York YCAZ33BA3

  • Page 1 26195A...
  • Page 4 26195A(R)
  • Page 5 25996A LD01980...
  • Page 6 27296A 27294A...
  • Page 7 LD01981 CAUTION: Excessive flow will cause damage to the cooler. Do not exceed maximum Cooler GPM. Special care should be taken when multiple chillers are fed by a single pump.
  • Page 9 LD01982 LD01983 LD01984...
  • Page 10 UNIT POWER SUPPLY INCOMING WIRE RANGE SYS. 1 COMPR. MAX SIZE MODEL DUAL ELEM DISC CKT BKR YORK SUPPLIED NON-FUSED ACL/ FUSE SIZE HACR START START DISCONNECT (OPTIONAL) TYPE Z33BA3 -17 (2)#4-250MCM (1) #1-600MCM OR (2) #1-250MCM Z33BA3 -28 (2)#4-250MCM...
  • Page 11 SYS. 2 COMPR. COND. ACL/ EACH 11.0 48.5 38.8 11.0 45.6 11.0 45.6 11.0 11.0 68.8 LD01985 UNIT CONTROL MIN CIRCUIT MAX DUAL NON-FUSED VOLTAGE POWER SUPPLY AMPACITY ELEMENT FUSE SIZE DISC. SW. SIZE Std. Models w/o Transformers 115-1-60 20A, 250V 30A, 240V...
  • Page 12 26195A...
  • Page 13 25112A...
  • Page 14 LD01986 LD01987 LD01988...
  • Page 15 WARNING: Flow switch must not be used to stop and start chiller. It is intended only as a safety switch.
  • Page 16 LD01989 LD01990...
  • Page 17 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 18 LD01992 LD01993 LD01994...
  • Page 20 LD01996...
  • Page 21 LD01997 LD01998 LD01999...
  • Page 22 26572A...
  • Page 24 25999A 26000A...
  • Page 25 26572A(D)
  • Page 27 26001A LD01944...
  • Page 29 NOTE: Discharge pressure transducers must be in- stalled. These are optional (Discharge Pres- sure Read-out Option) unless a Low Ambient Kit is installed.
  • Page 30 26572A(D)
  • Page 33 26572A...
  • Page 34 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 effect may cause the pressure to continue to...
  • Page 35 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 36 NOTE: When programming values from 80-99 PSIG, it is required to first key in a “0”. Example: 085 PSIG.
  • Page 37 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. NOTE: Hot Gas Bypass (Loadminder) should be counted as a step for programming purposes.
  • Page 38 26572A NOTE: The AM/PM key can only be pressed once. If an error is made, press the CANCEL key and begin again.
  • Page 39 NOTE: This will have no effect on the holiday sched- ule. NOTE: Only one start/stop time can be programmed which will apply to each of the “HOLIDAY” days selected.
  • Page 40 “THE FOLLOWING ARE PROGRAMMED” “RETURN WATER CONTROL” “LEAVING WATER CONTROL “...
  • Page 41 NOTE: In LWT CONTROL, water temperature may undesirably rise when a compressor cycles off and cannot restart because the anti-recycle timer is still timing out. The effects can be re- duced by programming the anti-recycle timer (Page 36) for a minimum of 300 seconds if it isn’t already programmed for 300 seconds.
  • Page 42 “RETURN WATER TEMP CONTROL” is...
  • Page 43 NOTE: When programming values between 0.1°-9.9°F, it is required to first key in a “0” or “00”. Ex- ample: 05.9°F.
  • Page 44 NOTE: Too small of a RATE SENSlTlVlTY value se- lection may prevent loading due to varying flows or if the water system allows a slug of cold water to enter which falsely fools the mi- cro into thinking the RATE SENSlTlVlTY has been exceeded, preventing loading and allow- ing leaving water temperature to rise above the desired temperature.
  • Page 45 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 anti-recycle timer. To eliminate this, in- crease the D T (temperature differential) of the CR and/or program the anti-recycle timer for a minimum of 300 seconds if it isn’t...
  • Page 46 NOTE: When programming values between 0.1-9.9°F, it is required to first key in a “0” or “00”. Exam- ple: 0.5-9°F.
  • Page 47 NOTE: Too small of a RATE SENSITIVITY Selection may prevent loading due to varying flows or if the wa- ter system allows a slug of cold water to enter which falsely fools the micro into thinking the RATE SENSITIVITY has been exceeded, pre- venting loading and allowing leaving water tem- perature to rise above the desired temperature.
  • Page 48 LD02002 LD02003...
  • Page 49 NOTE: The micro controls loading and unloading re- sponses on a 10 step scale regardless of the number of stages present. Therefore, loading and unloading responses on 5 & 7 step chillers may appear delayed (time between steps increased) when missing steps are activated or de-activated by the micro, 5 STEP CONTROL IS STANDARD.
  • Page 50 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 underrated op- erating conditions in a fully loaded system. Therefore, do not expect to see 100% FLA when the system is fully loaded.
  • Page 51 NOTE: LLSV refers to liquid line solenoid valve. NOTE: This safety is only operable if optional dis- charge pressure transducers are installed.
  • Page 52 CAUTION: NEVER BYPASS A FLOW SWITCH. THIS WILL CAUSE DAMAGE TO THE CHILLER AND VOID ANY WARRANTIES.
  • Page 54 26572A YORK INTERNATIONAL CORPORATION RECIPROCATING WATER CHILLERS SYSTEM STATUS 8:45AM 4/17/91 SYS 1 COMPRESSOR RUNNING SYS 2 ANTI -RECYCYLE TIMER 119 SEC RETURN WATER TEMP 65.1 DEGF LEAVING WATER TEMP 54.0 DEGF LOW WATER CUTOUT 36.0 DEGF SETPOINT TEMP 45.0 DEGF OUTSIDE AIR TEMP 75.0 DEGF...
  • Page 55 YORK INTERNATIONAL CORPORATION ý YORK INTERNATIONAL CORPORATION ý YORK INTERNATIONAL CORPORATION RECIPROCATING WATER CHILLERS RECIPROCATING WATER CHILLERS RECIPROCATING WATER CHILLERS SAFETY SHUTDOWN NUMBER 1 SAFETY SHUTDOWN NUMBER 2 SAFETY SHUTDOWN NUMBER 3 SHUTDOWN @ 8:48AM 4/17/91 SHUTDOWN @ 8:47AM 4/17/91...
  • Page 60 NOTE: The micro will attempt to control the Hot Gas, Solenoid Valve regardless of whether the op- tion is installed. NOTE: The micro will attempt to control the Hot Gas Solenoid Valve regardless of whether the op- tion is installed.
  • Page 61 (such as process duty or cooling other critical equipment) and the alarm circuit should fail to function, YORK will not be liable for damages. NOTE: This message will not appear if Anti-recycle or Anti-coincident timers are in effect and are be-...
  • Page 62 26000A 26001A LD01645...
  • Page 63 LD02005 26001A 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.
  • Page 64 NOTE: If a power failure should again occur, the above process will again need to be repeated to bring the chiller back on line.
  • Page 65 NOTE: Remote Setpoint Reset will not operate when a Remote Control Center Option Kit is con- nected to the Micro Panel. The Remote Con- trol Center will always determine the setpoint. CAUTION: Two cautions should be observed when us- ing these functions. Observing these cau- tions will assure that undesirable operation NOTE: After an onset signal, the new setpoint may be does not result.
  • Page 66 LD02006 LD02007...
  • Page 67 ¨ ¨ ¨ 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 lu- brication circuit.
  • Page 68 ¨ ¨ ¨ NOTE: It is IMPORTANT that all switches are properly programmed. Otherwise, undesirable operation will result. ¨ ¨ ¨ ¨ ¨ ¨ ¨ ¨ ¨ ¨ ¨ ¨ ¨ ¨ ¨ ¨ ¨ ¨...
  • Page 69 ¨ ¨...
  • Page 70 NOTE: The operating sequence described below re- lates to operation after power has been applied on a hot water start (such as start-up commis- sioning). Under these circumstances, loading will deviate from normal sequence and timing previously described. When a compressor starts, internal timers limit minimum time be- fore another compressor can start to 1 minute.
  • Page 72 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 73 NOTE: Any inductive devices (contactor/relay coil) con- nected to these contacts must be suppressed nected to these contacts must be suppressed with YORK P/N 031-00808 supplied by others. with YORK P/N 031-00808 supplied by others. Otherwise, nuisance faults may occur.
  • Page 74 NOTE: The corresponding compressor must be on for 4 sec. before this fan is permitted to start. Fan 2 will also be operating. NOTE: For operation below 0°F, program the cut-out for 0°F. This will cause the microprocessor to ignore the low ambient cut-out regardless of temperature.
  • Page 75 NOTE: The microprocessor will only activate the hot gas on the lead compressor.
  • Page 76 LD02010...
  • Page 77 23889A...
  • Page 78 YORK INTERNATIONAL CORPORATION RECIPROCATING WATER CHILLERS SYSTEM STATUS 8:45AM 4/17/91 SYS 1 COMPRESSOR RUNNING SYS 2 ANTI-COIN TIMER 13 SEC RETURN WATER TEMP 65.0 DEGF LEAVING WATER TEMP 54.0 DEGF LOW WATER CUTOUT 36.0 DEGF SETPOINT TEMP 45.0 DEGF OUTSIDE AIR TEMP 75.0 DEGF...
  • Page 79 LD02011 LD02012...
  • Page 80 0001TG LD02013...
  • Page 81 LD02014 25246A...
  • Page 82 LD02015 LD02016...
  • Page 83 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. CAUTION: THE 0-10 VDC INPUT SIGNAL WIRING NOTE: Remote Setpoint Reset will not operate when...
  • Page 84 5. Defective current transformer (CT). 5. CT resistance 42-44 ohms. Contact YORK Service Before Replacing Circuit Boards or C.T.s! “LOW OIL PRESS” 1. Low oil charge. 1. Oil level should be visible in either sight glass at all times.
  • Page 85 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 86 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 88 +66.2 +26.1 +174.2 +92.8 +199 +390.2 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 150.44-NM4 (395) Supersedes: 150.44-NM3 in ERR only...

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