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York YCAL0012EC Installation Operation & Maintenance

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AIR-COOLED LIQUID CHILLERS
HERMETIC SCROLL
New Release
Form 150.66-NM2 (906)
INSTALLATION, OPERATION, MAINTENANCE
035-21552-000
YCAL0012EC - YCAL0032EC
AIR-COOLED
SCROLL CHILLERS
STYLE D
(60 Hz)
9-1/2 - 28 TON
50091
R-22

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Summary of Contents for York YCAL0012EC

  • Page 1 AIR-COOLED LIQUID CHILLERS HERMETIC SCROLL New Release Form 150.66-NM2 (906) INSTALLATION, OPERATION, MAINTENANCE 035-21552-000 YCAL0012EC - YCAL0032EC AIR-COOLED SCROLL CHILLERS STYLE D (60 Hz) 9-1/2 - 28 TON 50091 R-22...
  • Page 2 NOT be installed inside the panel. NO external wiring is al- lowed to be run through the micro panel. All wiring must be in accordance with YORK’s published specifications and must be performed ONLY by qualified YORK personnel. YORK will not be responsible for damages/problems resulting from improper connections to the controls or application of improper control signals.
  • Page 3 In complying with YORK’s policy for continuous product improvement, the information contained in this document is subject to change without notice. While YORK makes no commitment to update or provide current information automatically to the manual owner, that information, if applicable, can be obtained by contacting the nearest YORK Engineered Systems Service office.

  • Page 4: Table Of Contents

    FORM 150.66-NM2 (906) TABLE OF CONTENTS SECTION 1 - GENERAL CHILLER SECTION 4 - INSTALLATION INFORMATION & SAFETY INSTALLATION CHECKLIST .......26 INTRODUCTION ............7 HANDLING .............26 WARRANTY ..............7 INSPECTION ............26 SAFETY ..............7 LOCATION CLEARANCES ........26 Standards for Safety ..........7 Foundation ............27 RESPONSIBILITY FOR SAFETY ......8 Ground Level Locations ........27 ABOUT THIS MANUAL ...........8...
  • Page 5 FORM 150.66-NM2 (906) TABLE OF CONTENTS (CONT’D) EQUIPMENT START-UP CHECKLIST ....34 OPER DATA KEY ..........100 Checking The System Prior To Initial Start-up OPER DATA QUICK REFERENCE LIST ..103 (No Power) ............34 PRINT KEY ............104 Unit Checks ............34 OPERATING DATA PRINTOUT ......104 Compressor Heaters HISTORY PRINTOUT ........105 (Power On 24 Hrs.
  • Page 6 FORM 150.66-NM2 (906) TABLE OF CONTENTS (CONT’D) LOW AMBIENT CONTROL OPTION ANALOG INPUTS - TEMPERATURE ....140 0012 - 0021 UNITS ..........126 OUTSIDE AIR SENSOR ........140 General ..............l26 LIQUID & REFRIGERANT SENSOR Potentiometers Configuration ......125 TEST POINTS ............141 Wiring ..............127 ANALOG INPUTS - PRESSURE ......142 PROGRAMMING ..........128 DIGITAL OUTPUTS ..........143 KEYPAD ..............144...

  • Page 7: Section 1 - General Chiller Information & Safety

    Center (see Commissioning Page 32). of air conditioning installations. • Only genuine YORK approved spare parts, oils, The unit is intended for cooling water or glycol solu- coolants, and refrigerants must be used.

  • Page 8: Responsibility For Safety

    This manual and any other document supplied with responsible for: the unit are the property of YORK which reserves all rights. They may not be reproduced, in whole or in part, •...

  • Page 9: Pressure Systems

    FORM 150.66-NM2 (906) Frame rails, brakes, and other components may also have Pressure Systems sharp edges. Reasonable care should be taken when working in contact with any components to avoid risk The unit contains refrigerant vapor and liquid under of minor abrasions and lacerations. pressure, release of which can be a danger and cause injury.

  • Page 10: Section 2 - Product Description

    FORM 150.66-NM2 (906) PRODUCT DESCRIPTION 50091 INTRODUCTION with Intertek Testing Services (ETL) and rated in ac- YORK Millennium Air-Cooled Scroll Chillers provide ® cordance with ARI Standard 550/590-2003. chilled water for all air conditioning applications using central station air handling or terminal units. They are...

  • Page 11: Condenser

    • Each system suction pressure • Chilled liquid temperatures • Discharge pressure (optional) • Ambient temperature • Liquid Temperature Reset via a YORK ISN DDC • System pressures (each circuit) or Building Automation System (by others) via: • Operating hours and starts (each compressor) - a pulse width modulated (PWM) input as stan- •...

  • Page 12: Power Panel

    Product Description FORM 150.66-NM2 (906) - a 4-20 milliamp or 0 -10 VDC input, or contact Provisions are included for: pumpdown at shutdown; optional remote chilled water temperature reset and two closure with the optional B.A.S. interface option. steps of demand load limiting from an external building •...

  • Page 13: Accessories & Options

    PWM input signal or up to two steps of demand (load) Circuit Breaker options have been included). limiting depending on model). (The standard control panel can be directly connected to a YORK Building SINGLE-POINT NON-FUSED DISCONNECT Automated System via the standard onboard RS485 SWITCH –...

  • Page 14: Compressor, Piping, Evaporator Options

    YCAL0012 - 0065 models. Option includes resized thermal expansion valve (Factory-Mounted). piping, wiring and refrigerant are by others. Includes YORK Service startup. See Form 150.62-NM1.1 (200) CHICAGO CODE RELIEF VALVES – Unit will for other application information (this option includes be provided with relief valves to meet Chicago code the Crankcase Heater option) (Field-Mounted).

  • Page 15: Sound Reduction Options

    FORM 150.66-NM2 (906) SOUND REDUCTION OPTIONS: SOUND ATTENUATION – One or both of the fol- lowing sound attenuation options are recommended for residential or other similar sound-sensitive locations. Louvered Panels can be ordered for winter applications where wind gusts may exceed five miles per hour. The following types of enclosure options are available: COMPRESSOR ACOUSTIC SOUND BLANKET –...

  • Page 16: Unit Components

    Product Description FORM 150.66-NM2 (906) UNIT COMPONENTS FAN ASSEMBLIES CONTROL / POWER PANEL CONDENSER COILS HEAT EXCHANGER COMPRESSORS FIG. 1 – UNIT COMPONENTS JOHNSON CONTROLS...

  • Page 17: Control / Power Panel Components

    FORM 150.66-NM2 (906) CONTROL / POWER PANEL COMPONENTS CIRCUIT BREAKER KEYPAD & DISPLAY UNIT SWITCH COMPRESSOR CONTACTORS USER TERMINAL BLOCK FIG. 2 – CONTROL/POWER PANEL COMPONENTS JOHNSON CONTROLS...

  • Page 18: Unit Nomenclature

    NOMINAL CAPACITY UNIT DESIGNATOR REFRIGERANT VOLTAGE/STARTER DESIGN/DEVELOPMENT LEVEL : R-22 : 200 / 3/ 60 : YORK : High Efficiency : Design Series A : 230 / 3 / 60 : Chiller : Engineering : 380 / 3 / 60...
  • Page 19 FORM 150.66-NM2 (906) PRODUCT IDENTIFICATION NUMBER (PIN) (CON’T) FEATURE DESCRIPTION OPTION DESCRIPTION No Control Transformer Required TRANS Cntrl Transformer (PIN 18) Control Transformer Required Special Control Transformer Required No Power Capacitor Required Power Factor Capacitor (PIN 19) Power Capacitor Required Special Power Capacitor Required No Ambient Kits Required Low Ambient Kits Required...
  • Page 20 Product Description FORM 150.66-NM2 (906) PRODUCT IDENTIFICATION NUMBER (PIN) (CON’T) FEATURE DESCRIPTION OPTION DESCRIPTION No Chicago Code Kit Required Chicago Code Kit Required CHICAGO Chicago Code Kit (PIN 31) Service Isolation Valves Both Chicago Code & Serv Isolation Special Chicago Code Kit Required Standard Valves Required VALVES Valves (PIN 32)
  • Page 21 FORM 150.66-NM2 (906) PRODUCT IDENTIFICATION NUMBER (PIN) (CON’T) FEATURE DESCRIPTION OPTION DESCRIPTION UL Pressure Code Vessel VESSEL Vessel Codes (PIN 42) ASME Pressure Vessel Code Special Pressure Vessel Code Standard Cooler Required Cooler (PIN 43) Remote Cooler Required Special Cooler Required No Option Required PIN 44 (PIN 44)
  • Page 22 Product Description FORM 150.66-NM2 (906) PRODUCT IDENTIFICATION NUMBER (PIN) (CON’T) FEATURE DESCRIPTION OPTION DESCRIPTION 1st Year Parts Only 1st Year Parts & Labor 2nd Year Parts Only 2nd Parts & Labor WARRANTY Warranty (PIN 55) 5 Year Compressor Parts Only 5 Year Compressor Parts &...

  • Page 23: Refrigerant Flow Diagram

    FORM 150.66-NM2 (906) REFRIGERANT FLOW DIAGRAM AIR COOLED CONDENSERS HOT DISCHARGE GAS LINE OPTIONAL OPTIONAL DISCHARGE LINE BALL VALVE OPTIONAL SERVICE VALVE LD11417 FIG. 3 – REFRIGERANT FLOW DIAGRAM JOHNSON CONTROLS...

  • Page 24: Section 3 -Handling And Storage

    If any damage is evident, it should be noted on the carrier’s freight bill and a claim entered in accordance with the instructions given on the advice note. Major damage must be reported immediately to your local YORK representative. JOHNSON CONTROLS...

  • Page 25: Unit Rigging

    FORM 150.66-NM2 (906) Lifting Instructions are placed on a label on the chiller and on the shipping bag. LD11837 LD11838 Forks must extend beyond the width of the unit for proper lift. The thick- ness of the fork blade must be smaller then the opening of the lifting hole.

  • Page 26: Section 4 - Installation

    To ensure warranty coverage, this equipment must be commissioned Immediately upon receiving the unit, it should be in- and serviced by an authorized YORK spected for possible damage which may have occurred service mechanic or a qualified service during transit. If damage is evident, it should be noted person experienced in chiller instal- in the carrier’s freight bill.

  • Page 27: Foundation

    Con- cilitate servicing. siderations should be made utilizing noise levels pub- lished in the YORK Engineering Guide for the specific Piping to the inlet and outlet connections of the chiller should include high-pressure rubber hose or piping chiller model.

  • Page 28: General Requirements

    WIRING 7. A chilled water flow switch, (either by YORK or oth- Liquid Chillers are shipped with all factory-mounted ers) MUST be installed in the leaving water piping controls wired for operation.

  • Page 29: Evaporator Pump Start Contacts

    FORM 150.66-NM2 (906) A 120-1-60, 15 amp source must be supplied for the Remote Emergency Cutoff control panel through a fused disconnect when a control panel transformer (optional) is not provided (Refer to Immediate shutdown of the chiller can be accomplished FIG.

  • Page 30: Single Point Supply Connection

    Installation FORM 150.66-NM2 (906) SINGLE-POINT SUPPLY CONNECTION – TERMINAL BLOCK, NON-FUSED DISCONNECT SWITCH OR CIRCUIT BREAKER (0012 - 0032) Power Panel Power Panel Power Panel Control Panel Control Panel Control Panel Terminal Block, Terminal Block, MICROPANEL MICROPANEL NF Disconnect SW NF Disconnect SW or Circuit Breaker or Circuit Breaker...

  • Page 31: Control Wiring

    FORM 150.66-NM2 (906) CONTROL WIRING FLOW SW REMOTE START/STOP PWM INPUT LOAD LIMIT INPUT CTB1 LD07725 � * Factory wired with optional transformer. ��� LD07730a It is possible that multiple sources of power can be supplying the unit power panel. To prevent serious injury or death, the technician should verify that NO LETHAL VOLTAGES are present inside the panel AFTER disconnecting power, PRIOR to working on equipment.

  • Page 32: Section 5 - Commissioning

    FORM 150.66-NM2 (906) COMMISSIONING Compressor Oil Commissioning of this unit should To add oil to a circuit - connect a YORK hand oil pump only be carried out by YORK Autho- (Part No. 470-10654-000) to the 1/4” oil charging valve rized personnel.

  • Page 33: Preparation - Power On

    FORM 150.66-NM2 (906) If mains power must be switched OFF for extended PREPARATION – POWER ON maintenance or an extended shutdown period, the Perform the commissioning using compressor suction, discharge and economizer service stop valves should be closed (clockwise). If there is the detailed checks outlined in the a possibility of liquid freezing due to low ambient EQUIPMENT START-UP CHECK...

  • Page 34: Equipment Startup Checklist

    Commissioning FORM 150.66-NM2 (906) EQUIPMENT STARTUP CHECKLIST 7. Check the control panel to ensure it is free of JOB NAME: ______________________________ foreign material (wires, metal chips, etc.). SALES ORDER #: _________________________  8. Visually inspect wiring (power and control). Wir- LOCATION: ______________________________ ing MUST meet N.E.C.

  • Page 35: Setpoints Entry List

    FORM 150.66-NM2 (906) The chilled liquid setpoint may need TABLE 1 – SETPOINTS ENTRY LIST to be temporarily lowered to ensure OPTIONS all compressors cycle “on.” Display Language Sys 1 Switch Chilled Liquid * Ambient Control Local/Remote Mode Control Mode This unit uses scroll compressors Display Units which can only operate in one direc-...

  • Page 36: Checking Superheat & Subcooling

    Commissioning FORM 150.66-NM2 (906) When adjusting the expansion valve (TXV only), the CHECKING SUPERHEAT AND SUBCOOLING adjusting screw should be turned not more than one The subcooling temperature of each system can be cal- turn at a time, allowing sufficient time (approximately culated by recording the temperature of the liquid line 15 minutes) between adjustments for the system and the at the outlet of the condenser and subtracting it from...

  • Page 37: Unit Operating Sequence

    FORM 150.66-NM2 (906) UNIT OPERATING SEQUENCE 4. Several seconds after the compressor starts, that The operating sequence described below relates to op- eration on a hot water start after power has been applied, systems first condenser fan will be cycled on (out- door air temperature >...

  • Page 38: Section 6 - Technical Data

    1. For leaving brine temperature below 40°F (4.4°C), contact your nearest YORK Office for application requirements. 2. For leaving water temperature higher than 55°F (12.8°C), contact the nearest YORK Office for application guidelines. 3. The evaporator is protected against freezing to -20°F (-28.8°C) with an electric heater as standard.

  • Page 39: Ethylene Glycol Correction Factors

    FORM 150.66-NM2 (906) OPERATIONAL LIMITATIONS (ENGLISH) ENGLISH 1000.0 100.0 10.0 1000 FLOW, GPM HEAT EXCHANGER FLOW, GPM LD10955 MODEL YCAL COOLER CURVE YCAL0012 YCAL0018 YCAL0021 YCAL0027/0025 YCAL0032 Note: Water Pressure Drop Curves may extend past the minimum and maximum water flow ranges. TABLE 4 –...

  • Page 40: Operational Limitations (Si)

    1. For leaving brine temperature below 40°F (4.4°C), contact your nearest YORK Office for application requirements. 2. For leaving water temperature higher than 55°F (12.8°C), contact the nearest YORK Office for application guidelines. 3. The evaporator is protected against freezing to -20°F (-28.8°C) with an electric heater as standard.

  • Page 41: Ethylene Glycol Correction Factors

    FORM 150.66-NM2 (906) OPERATIONAL LIMITATIONS (SI) 1000.0 100.0 10.0 FLOW, L/S HEAT EXCHANGER FLOW, L/S LD10956 MODEL YCAL COOLER CURVE YCAL0012 YCAL0018 YCAL0021 YCAL0027/0025 YCAL0032 Note: Water Pressure Drop Curves may extend past the minimum and maximum water flow ranges. TABLE 7 –...

  • Page 42: Physical Data (English)

    Technical Data FORM 150.66-NM2 (906) PHYSICAL DATA (ENGLISH) YCAL0012_ - YCAL0032_ TABLE 8 – PHYSICAL DATA (ENGLISH) 60Hz Dimension General Unit Data (No Pump Models) Nominal Compr Capacity Shipping Operating Model Refrigerant Weight * Weight * Nominal Number of Charge, Length Width Height Tons, Refrigerant...
  • Page 43 FORM 150.66-NM2 (906) SOUND DATA (ENGLISH) YCAL0012_ - YCAL0032_ TABLE 9 – SOUND DATA (ENGLISH) 60Hz Line Frequency LOW NOISE FAN (STANDARD) 1000 2000 4000 8000 YCAL0012 YCAL0018 YCAL0021 YCAL0025 YCAL0027 YCAL0032 60Hz Line Frequency LOW NOISE FAN WITH COMPRESSOR SOUND BLANKETS 1000 2000 4000...

  • Page 44: Sound Data (English)

    Dual Element Fuse Circuit Breaker Terminal- Volt/ Lug/ Model Ampacity Non Fused Block Lug 60 Hz Phase (MCA) Disconnect Wire Range #14-2/0 #14-2/0 #14-2/0 YCAL0012EC #14-2/0 #14-2/0 #14-2/0 #14-2/0 YCAL0018EC #14-2/0 #14-2/0 #14-2/0 #14-2/0 #14-2/0 YCAL0021EC #14-2/0 #14-2/0 #14-2/0 #14-2/0 #14-2/0...

  • Page 45: Electrical Data

    FORM 150.66-NM2 (906) ELECTRICAL DATA YCAL0012 - 0032 (ENGLISH) (CON’T) SINGLE POINT FIELD SUPPLIED POWER WIRING (See Fig. 5) (One Field Provided Power Supply to the chiller. Field connections to Factory Provided Power Terminal Block (standard), Non-Fused Discon- nect Switch (optional) or Circuit Breaker (optional)). Compressors &...
  • Page 46 Technical Data FORM 150.66-NM2 (906) ELECTRICAL DATA TABLE 16 - MICRO PANEL POWER SUPPLY OVER CURRENT PROTECTION, CONTROL UNIT VOLTAGE SEE NOTE B NF DISC Sw POWER NOTE A UNIT MODELS w/o VOLTAGE CONTROL 115-1-60/50 30 A / 240V TRANS 200-1-60 30 A / 240V 230-1-60...

  • Page 47: Electrical Notes

    FORM 150.66-NM2 (906) ELECTRICAL NOTES AND LEGEND NOTES: 1. Minimum Circuit Ampacity (MCA) is based on 125% of the rated load amps for the largest motor plus 100% of the rated load amps for all other loads included in the circuit, per N.E.C. Article 430-24. If the optional Factory Mounted Control Transformer is provided, add the following MCA values to the electrical tables for the system providing power to the transformer: -17, add 2.5 amps;...

  • Page 48: Wiring Diagrams

    Technical Data FORM 150.66-NM2 (906) ELEMENTARY DIAGRAM STANDARD UNITS (0012 - 0032) LOW SOUND (0025 - 0032 460V) FOR LOW AMBIENT KIT, REMOVE WIRE 127 FROM CONTROL CIRCUIT TERMINAL TB4/2 AND RECONNECT IT TO TB3/3. LD11797 FIG. 7 - CONTROL CIRCUIT JOHNSON CONTROLS...
  • Page 49 FORM 150.66-NM2 (906) ELEMENTARY DIAGRAM (CON’T) LD11798 FIG. 7 (CON’T) - CONTROL CIRCUIT JOHNSON CONTROLS...
  • Page 50 Technical Data FORM 150.66-NM2 (906) ELEMENTARY DIAGRAM STANDARD UNITS (0012 - 0021) LD11799 FIG. 8 - POWER CIRCUIT JOHNSON CONTROLS...
  • Page 51 FORM 150.66-NM2 (906) ELEMENTARY DIAGRAM STANDARD UNITS (0025 - 0032, LOW SOUND 0025 - 0032 460V)) LD12241 FIG. 9 - POWER CIRCUIT JOHNSON CONTROLS...
  • Page 52 FORM 150.66-NM2 (906) THIS PAGE INTENTIONALLY BLANK JOHNSON CONTROLS...
  • Page 53 FORM 150.66-NM2 (906) CONNECTION DIAGRAM STANDARD UNITS (0012 - 0021) LD11800 FIG. 10 - CONNECTION DIAGRAM - STANDARD UNIT JOHNSON CONTROLS...
  • Page 54 FORM 150.66-NM2 (906) ELEMENTARY DIAGRAM LOW SOUND UNITS (0025 - 0032) (Except 460V) LD11791 FIG. 11 - CONTROL CIRCUIT JOHNSON CONTROLS...
  • Page 55 FORM 150.66-NM2 (906) ELEMENTARY DIAGRAM (CON’T) LD11792 FIG. 11 (CON’T) - CONTROL CIRCUIT - LOW SOUND UNITS JOHNSON CONTROLS...
  • Page 56 Technical Data FORM 150.66-NM2 (906) CONNECTION DIAGRAM LOW SOUND UNITS (0025 - 0032) (Except 460V) LD11793 FIG. 12- POWER CIRCUIT JOHNSON CONTROLS...
  • Page 57 FORM 150.66-NM2 (906) CONNECTION DIAGRAM LOW SOUND UNITS (0025 - 0032) (Except 460V) LD11794 FIG. 13 - CONNECTION DIAGRAM - LOW SOUND UNITS JOHNSON CONTROLS...
  • Page 58 FORM 150.66-NM2 (906) ELEMENTARY DIAGRAM - DETAILS ALL MODELS LD11793 FIG. 14 - ELEMENTARY DIAGRAM DETAILS- ALL MODELS UNIT JOHNSON CONTROLS...
  • Page 59 FORM 150.66-NM2 (906) CONNECTION DIAGRAM ALL MODELS LD11796 FIG. 15 - CONNECTION DIAGRAM - STANDARD UNIT JOHNSON CONTROLS...

  • Page 60: Dimensions

    Site restrictions may compromise minimum clearances indicated below, resulting in unpredictable airflow patterns and possible diminished performance. YORK’s unit controls will optimize operation without nuisance high-pressure safety cutouts; however, the system designer must consider potential performance degradation. Recommended minimum clearances: front to wall –...
  • Page 61 FORM 150.66-NM2 (906) DIMENSIONS - YCAL0012 (ENGLISH) (CON’T) 9/16" DIA MOUNTING HOLES(typ) 1 1/16" CONTROL COMPR PANEL 44 3/8" END CAP WIDTH 32 1/8" 6 1/8" 1 1/16" ORIGIN 2 1/4" 5" TOP VIEW 17" 1" 9 1/16" CONTROL PANEL 38 3/16"...
  • Page 62 Site restrictions may compromise minimum clearances indicated below, resulting in unpredictable airflow patterns and possible diminished performance. YORK’s unit controls will optimize operation without nuisance high-pressure safety cutouts; however, the system designer must consider potential performance degradation. Recommended minimum clearances: front to wall –...
  • Page 63 FORM 150.66-NM2 (906) DIMENSIONS - YCAL0018 (ENGLISH) (CON’T) 9/16" DIA MOUNTING HOLES(typ) 1 1/16" CONTROL COMPR PANEL 44 3/8" END CAP WIDTH 32 1/8" 6 1/8" 1 1/16" ORIGIN 2 1/4" 5" TOP VIEW 17" 1" 9 1/16" CONTROL PANEL 38 3/16"...
  • Page 64 Site restrictions may compromise minimum clearances indicated below, resulting in unpredictable airflow patterns and possible diminished performance. YORK’s unit controls will optimize operation without nuisance high-pressure safety cutouts; however, the system designer must consider potential performance degradation. Recommended minimum clearances: front to wall –...
  • Page 65 FORM 150.66-NM2 (906) DIMENSIONS - YCAL0021 (ENGLISH) (CON’T) 9/16" DIA MOUNTING HOLES(typ) 1 1/16" CONTROL COMPR PANEL 44 3/8" END CAP WIDTH 32 1/8" 6 1/8" 1 1/16" ORIGIN 2 1/4" 5" TOP VIEW 17" 1" 9 1/16" CONTROL PANEL 38 3/16"...
  • Page 66 Site restrictions may compromise minimum clearances indicated below, resulting in unpredictable airflow patterns and possible diminished performance. YORK’s unit controls will optimize operation without nuisance high-pressure safety cutouts; however, the system designer must consider potential performance degradation. Recommended minimum clearances: front to wall –...
  • Page 67 FORM 150.66-NM2 (906) DIMENSIONS - YCAL0025 (ENGLISH) (CON’T) 9/16" DIA MOUNTING HOLES(typ) 1 1/16" CONTROL COMPR PANEL 44 3/8" END CAP WIDTH 32 1/8" 6 1/8" 1 1/16" 1 7/8" ORIGIN 5" 17" TOP VIEW 1" 9" CONTROL PANEL 42 1/8" 3 3/8"...
  • Page 68 Site restrictions may compromise minimum clearances indicated below, resulting in unpredictable airflow patterns and possible diminished performance. YORK’s unit controls will optimize operation without nuisance high-pressure safety cutouts; however, the system designer must consider potential performance degradation. Recommended minimum clearances: front to wall –...
  • Page 69 FORM 150.66-NM2 (906) DIMENSIONS - YCAL0027 (ENGLISH) (CON’T) 9/16" DIA MOUNTING HOLES(typ) 1 1/16" CONTROL COMPR PANEL 44 3/8" END CAP WIDTH 32 1/8" 6 1/8" 1 1/16" 1 7/8" ORIGIN 5" 17" TOP VIEW 1" 9" CONTROL PANEL 42 1/8" 3 3/8"...
  • Page 70 Site restrictions may compromise minimum clearances indicated below, resulting in unpredictable airflow patterns and possible diminished performance. YORK’s unit controls will optimize operation without nuisance high-pressure safety cutouts; however, the system designer must consider potential performance degradation. Recommended minimum clearances: front to wall –...
  • Page 71 FORM 150.66-NM2 (906) DIMENSIONS - YCAL0032 (ENGLISH) (CON’T) 9/16" DIA MOUNTING HOLES(typ) 1 1/16" CONTROL COMPR PANEL 44 3/8" END CAP WIDTH 32 1/8" 6 1/8" 1 1/16" 1 7/8" ORIGIN 5" 17" TOP VIEW 1" 9" CONTROL PANEL 42 1/8" 3 3/8"...
  • Page 72 Site restrictions may compromise minimum clearances indicated below, resulting in unpredictable airflow patterns and possible diminished performance. YORK’s unit controls will optimize operation without nuisance high-pressure safety cutouts; however, the system designer must consider potential performance degradation. Recommended minimum clearances: front to wall – 2m;...
  • Page 73 FORM 150.66-NM2 (906) DIMENSIONS - YCAL0012 (SI) (CON’T) 14 DIA MOUNTING HOLES(typ) CONTROL COMPR PANEL 1128 END CAP WIDTH ORIGIN TOP VIEW CONTROL PANEL (2) 178 X 57 FORKLIFT HOLES (2) 76 X 38 BOTH SIDES RIGGING HOLES BOTH SIDES 1130 1892 2466...
  • Page 74 Site restrictions may compromise minimum clearances indicated below, resulting in unpredictable airflow patterns and possible diminished performance. YORK’s unit controls will optimize operation without nuisance high-pressure safety cutouts; however, the system designer must consider potential performance degradation. Recommended minimum clearances: front to wall – 2m;...
  • Page 75 FORM 150.66-NM2 (906) DIMENSIONS - YCAL0018 (SI) (CON’T) 14 DIA MOUNTING HOLES(typ) CONTROL COMPR PANEL 1128 END CAP WIDTH ORIGIN TOP VIEW CONTROL PANEL (2) 178 X 57 FORKLIFT HOLES BOTH SIDES (2) 76 X 38 RIGGING HOLES BOTH SIDES 1130 1892 2466...
  • Page 76 Site restrictions may compromise minimum clearances indicated below, resulting in unpredictable airflow patterns and possible diminished performance. YORK’s unit controls will optimize operation without nuisance high-pressure safety cutouts; however, the system designer must consider potential performance degradation. Recommended minimum clearances: front to wall – 2m;...
  • Page 77 FORM 150.66-NM2 (906) DIMENSIONS - YCAL0021 (SI) (CON’T) 14 DIA MOUNTING HOLES(typ) CONTROL COMPR PANEL 1128 END CAP WIDTH ORIGIN TOP VIEW (2) 178 X 57 FORKLIFT HOLES BOTH SIDES (2) 76 X 38 RIGGING HOLES BOTH SIDES 1130 1892 2466 2774 FRONT VIEW...
  • Page 78 Site restrictions may compromise minimum clearances indicated below, resulting in unpredictable airflow patterns and possible diminished performance. YORK’s unit controls will optimize operation without nuisance high-pressure safety cutouts; however, the system designer must consider potential performance degradation. Recommended minimum clearances: front to wall – 2m;...
  • Page 79 FORM 150.66-NM2 (906) DIMENSIONS - YCAL0025 (SI) (CON’T) 14 DIA MOUNTING HOLES(typ) CONTROL COMPR PANEL 1128 END CAP WIDTH ORIGIN TOP VIEW CONTROL PANEL 1070 (2) 178 X 57 FORKLIFT HOLES BOTH SIDES (2) 76 X 38 RIGGING HOLES 1282 BOTH SIDES 2044 2669...
  • Page 80 Site restrictions may compromise minimum clearances indicated below, resulting in unpredictable airflow patterns and possible diminished performance. YORK’s unit controls will optimize operation without nuisance high-pressure safety cutouts; however, the system designer must consider potential performance degradation. Recommended minimum clearances: front to wall – 2m;...
  • Page 81 FORM 150.66-NM2 (906) DIMENSIONS - YCAL0027 (SI) (CON’T) 14 DIA MOUNTING HOLES(typ) CONTROL COMPR PANEL 1128 END CAP WIDTH ORIGIN TOP VIEW CONTROL PANEL 1070 (2) 178 X 57 FORKLIFT HOLES BOTH SIDES (2) 76 X 38 RIGGING HOLES 1282 BOTH SIDES 2044 2669...
  • Page 82 Site restrictions may compromise minimum clearances indicated below, resulting in unpredictable airflow patterns and possible diminished performance. YORK’s unit controls will optimize operation without nuisance high-pressure safety cutouts; however, the system designer must consider potential performance degradation. Recommended minimum clearances: front to wall – 2m;...
  • Page 83 FORM 150.66-NM2 (906) DIMENSIONS - YCAL0032 (SI) (CON’T) 14 DIA MOUNTING HOLES(typ) CONTROL COMPR PANEL 1128 END CAP WIDTH ORIGIN TOP VIEW CONTROL PANEL 1070 (2) 178 X 57 FORKLIFT HOLES BOTH SIDES (2) 76 X 38 RIGGING HOLES 1282 BOTH SIDES 2044 2669...

  • Page 84: Technical Data (Clearances)

    Technical Data FORM 150.66-NM2 (906) TECHNICAL DATA - CLEARANCES (1.3 m) (2 m) LD10506 NOTES: 1. No obstructions allowed above the unit. 2. Only one adjacent wall may be higher than the unit. 3. Adjacent units should be 10 feet (3 Meters) apart. FIG.

  • Page 85: Isolators

    FORM 150.66-NM2 (906) ISOLATOR SELECTION (WITHOUT PUMP PACKAGE OPTION) Standard Aluminum Condenser Fins Optional Copper Condenser Fins Location 1” Deflection CIP-B-450 CIP-B-750 CIP-B-450 CIP-B-750 CIP-B-450 CIP-B-750 CIP-B-450 CIP-B-750 Neoprene ND-C ND-C ND-C ND-C ND-C ND-C ND-C ND-C YCAL0012 SLRS- SLRS- SLRS- SLRS- SLRS-...
  • Page 86 YORK sales office. and kilograms at the specific location, isolator position, Be aware, weights may change with each option along and location measurements for each isolator.
  • Page 87 11.1 165.1 38.1 155.5 133.3 Weight Range Weight Range Model Number Color YORK P/N (lbs) (kg) 239 to 384 lbs 108 to 174 kg CIP - B - 450 029-24583-002 384 to 639 lbs 174 to 290 kg CIP - B - 750...
  • Page 88 Technical Data FORM 150.66-NM2 (906) INSTALLATION OF 1" DEFLECTION MOUNTS 1. Floor or steel frame should be level and smooth. 5. Complete piping and fill equipment with water, refrigerant, etc. 2. For pad installations, isolators do not normally re- quire bolting. If necessary, anchor isolators to floor 6.
  • Page 89 1/2- 13 x 1” 1/ 2" ND-C 65.1 69.9 139.7 58.7 101.9 1/2- 13 x 1” 1/ 2" Weight Range Weight Range Model Number Color YORK P/N (lbs) (kg) Up to 751 lbs Up to 341 kg ND-C Yellow 029-24585-006 JOHNSON CONTROLS...
  • Page 90 HCW MBD 2-C2 215.9 15.9 34.9 355.6 311.2 133.4 88.9 5/8" *Weight Range Weight Range Model Number Color YORK P/N (lbs) (kg) Up to 358 lbs Up to 162 kg SLRS-2-C2- 029-24585-006 358 to 443 lbs 162 to 201 kg...
  • Page 91 FORM 150.66-NM2 (906) SLRS SEISMIC ISOLATOR INSTALLATION AND ADJUSTMENT TO INSTALL AND ADJUST MOUNTS 1. Supports for mountings must be leveled to installation's acceptable tolerances. 2. Mountings not subjected to seismic or wind forces do not require bolting to supports. 3.

  • Page 92: Section 7 - Unit Controls

    YORK MILLENNIUM CONTROL CENTER 00065VIP INTRODUCTION MICROPROCESSOR BOARD The YORK MicroComputer Control Center is a micro- The Microprocessor Board is the controller and deci- processor based control system designed to provide the sion maker in the control panel. System inputs such entire control for the liquid chiller.

  • Page 93: Unit Switch

    FORM 150.66-NM2 (906) UNIT SWITCH BATTERY BACK-UP A unit ON/OFF switch is just underneath the keypad. The Microprocessor Board contains a Real Time Clock This switch allows the operator to turn the entire unit integrated circuit chip with an internal battery backup. “OFF”...

  • Page 94: "Status" Key

    Unit Controls FORM 150.66-NM2 (906) “STATUS” KEY 00066VIP UNIT STATUS R E M O T E C O N T R O L L E D S H U T D O W N Pressing the STATUS key will enable the operator to determine current chiller operating status.
  • Page 95 FORM 150.66-NM2 (906) The limiting pressure is a factory set limit to keep the S Y S C O O L L O A D system from faulting on the high discharge pressure cutout due to high load or pull down conditions. When the unload point is reached, the micro will automati- This message informs the operator that the chilled liquid cally unload the affected system by de energizing one...

  • Page 96: Fault Safety Status Messages

    Unit Controls FORM 150.66-NM2 (906) S Y S P U M P I N G D O W N S Y S L O W S U C T P R E S S The PUMPING DOWN message indicates that a com- The Suction Pressure Cutout is a software cutout that pressor in the respective system is presently in the pro- helps protect the chiller from an evaporator freeze-up...
  • Page 97 FORM 150.66-NM2 (906) The internal motor protector opens at 185°F - 248°F S Y S L O W E V A P T E M P (85°C - 120°C) and auto resets. The mechanical HP switch opens at 405 PSIG +/- 10 PSIG (27.92 barg +/- .69 barg) and closes at 330 PSIG +/- 25 PSIG (22.75 barg The Low Evaporator Temperature Cutout is to pro- +/- 1.72 barg).

  • Page 98: Unit Safeties

    Unit Controls FORM 150.66-NM2 (906) This safety will shut down a system if either suction U N I T F A U L T : temperature or suction pressure sensors read out of H I G H M T R C U R R range high or low.

  • Page 99: Status Key Messages

    FORM 150.66-NM2 (906) STATUS KEY MESSAGES TABLE 18 – STATUS KEY MESSAGES QUICK REFERENCE LIST STATUS KEY MESSAGES General Messages Fault Messages Unit Safeties & System Safeties Unit Switch Off Warning Messages Shutdown Remote Controlled System X High Disch Pressure Low Ambient Temp Shutdown Low Liquid Temp...

  • Page 100: Display/Print Keys

    Unit Controls FORM 150.66-NM2 (906) DISPLAY/PRINT KEYS 00067VIP The Display/Print keys allow the user to retrieve system With the “UNIT TYPE” set as a liquid chiller (via no and unit information that is useful for monitoring chiller jumper between J4-11 and J4-6), the following list of operation, diagnosing potential problems, troubleshoot- operating data screens are viewable under the Oper Data ing, and commissioning the chiller.
  • Page 101 FORM 150.66-NM2 (906) Run times and starts will only be dis- S Y S 7 2 . 1 P S I G played for the actual number of sys- = 2 2 7 . 0 P S I G tems and compressors on the unit. These displays show suction and discharge pressures for each system.
  • Page 102 The preceding five messages will appear sequentially, may be via ISN. first for system 1, then for system 2. ISN – YORK Talk via ISN allows remote load limiting The first message indicates the system and the associated and temperature reset through an ISN system.

  • Page 103: Oper Data Quick Reference List

    FORM 150.66-NM2 (906) TABLE 19 – OPERATION DATA See the section on Condenser Fan Control in the UNIT Oper Data Key OPERATION section for more information. Leaving & Chilled Liquid Temps The fifth message displays current as sensed by the optional current feedback circuitry.

  • Page 104: Print Key

    Data printout is shown below. (Note: Not all values are CONDENSER FAN STAGES printed for all models.) EEV OUTPUT 0.0 % SYSTEM XXX.X AMPS X.X VOLTS YORK INTERNATIONAL CORPORATION MILLENNIUM LIQUID CHILLER DAILY SCHEDULE S M T W T F S *=HOLIDAY UNIT STATUS MON START=00:00AM...

  • Page 105: History Printout

    L I Q U I D T E M P history print and the header will be as follows. Displays the type of fault that occurred. YORK INTERNATIONAL MILLENNIUM LIQUID CHILLER U N I T T Y P E SAFETY SHUTDOWN NUMBER 1...
  • Page 106 Unit Controls FORM 150.66-NM2 (906) A M B I E N T C O N T R O L L O W A M B I E N T T E M P X X X X X X X X X X C U T O U T X X X .

  • Page 107: Software Version

    FORM 150.66-NM2 (906) S Y S F A N S T A G E X X X E V A P P U M P X X X E V A P H E A T E R X X X Displays the number of Fan Stages in the system active Displays status of the Evaporator Pump and Heater at the time of the fault.

  • Page 108: "Entry" Keys

    Unit Controls FORM 150.66-NM2 (906) “ENTRY” KEYS 00068VIP The Entry Keys allows the user to view, change programmed ENTER/ADV key values. The ENTRY keys consist of an ↑ (UP) arrow key, ↓ The ENTER/ADV key must be pushed after any change (DOWN) arrow key, and an ENTER/ADV key.

  • Page 109: Setpoints Key

    FORM 150.66-NM2 (906) “SETPOINTS” KEYS 00069VIP Programming of the cooling setpoints, daily schedule, LEAVING CHILLED LIQUID CONTROL and safeties is accomplished by using the keys located under the SETPOINTS section. S E T P O I N T 4 5 . 0 ° F R A N G E 2 .

  • Page 110: Return Chilled Liquid Control

    Unit Controls FORM 150.66-NM2 (906) When in leaving chilled liquid temperature control, the R E M S E T P 4 4 . 0 ° F micro will attempt to control the leaving water tempera- R A N G E + / - 2 .
  • Page 111 30°F (-1.1°C). When using glycol, Leaving Chilled Liquid Setpoint should not be set below 20°F (-6.7°C). ** Do not exceed 55°F (12.8°C) setpoint before contacting the nearest YORK Office for application guidelines. The line under the 0 is the cursor. If the value is wrong,...

  • Page 112: Program Key

    Unit Controls FORM 150.66-NM2 (906) PROGRAM KEY L O W A M B I E N T T E M P C U T O U T 2 5 . 0 ° F There are several operating parameters under the PRO- GRAM key that are programmable.

  • Page 113: System Trip Volts

    FORM 150.66-NM2 (906) The microprocessor will not allow This MUST be programmed correctly programming the “FAN CONTROL to assure proper chiller operation. ON PRESSURE” minus the “FAN CONTROL DIFFERENTIAL OFF PRESSURE” below 160PSIG. This assures discharge pressure does not drop too low. S Y S T R I P V O L T S...

  • Page 114: Unit Trip Volts

    Unit Controls FORM 150.66-NM2 (906) UNIT TRIP VOLTS R E M O T E U N I T P R O G R A M M E D For total chiller high current trip programming on 460VAC chillers: When communications is required with a BAS or •...

  • Page 115: Setpoints Quick Reference List

    FORM 150.66-NM2 (906) TABLE 22 – SETPOINTS QUICK REFERENCE LIST Quick Reference Programming Chart Setpoints Section Cooling Setpoints Key Schedule/ Program Mode (press key to adv.) Advance Day Key (press enter to adv.) Local Leaving Mon. – Sun. Discharge Water Temp Control &...

  • Page 116: "Unit" Keys

    Unit Controls FORM 150.66-NM2 (906) “UNIT” KEYS 00070VIP OPTIONS KEY Turning a system off with its system There are many user programmable options under the OPTIONS key. The OPTIONS key is used to scroll switch allows a pumpdown to be per- through the list of options by repeatedly pressing the formed prior to shutdown.
  • Page 117 FORM 150.66-NM2 (906) Option 4 – Ambient Control Type: C O N T R O L M O D E A M B I E N T C O N T R O L L E A V I N G L I Q U I D S T A N D A R D The low ambient cutout is adjustable from 25°F to 60°F...
  • Page 118 Unit Controls FORM 150.66-NM2 (906) F A N C O N T R O L C U R R E N T F E E D B A C K A M B I E N T & D S C H P R E S S O N E P E R...

  • Page 119: Clock

    FORM 150.66-NM2 (906) To change the day, time, and date press the CLOCK Option 15 – Expansion Valve Type: key. The display will show something similar to the fol- E X P A N S I O N V A L V E T Y P E lowing: T H E R M O S T A T I C...

  • Page 120: Unit Keys Programming Quick Reference List

    Unit Controls FORM 150.66-NM2 (906) TABLE 23 – UNIT KEYS PROGRAMMING QUICK REFERENCE LIST (YCAL0012 - 0032 ONLY) (YCAL0012 - 0032 ONLY) Unit Type ("Chiller" MUST be Selected Via No Jumper Installed) (Viewable Only) (Programmed under Service Mode) (Viewable Only) (Programmed under Service Mode) (Viewable Only) LD07405...

  • Page 121: Section 8 - Unit Operation

    FORM 150.66-NM2 (906) UNIT OPERATION CAPACITY CONTROL to within +/- the (control) cooling range. The Setpoint High Limit is the Setpoint plus the Cooling Range. The To initiate the start sequence of the chiller, all run per- Setpoint Low Limit is the Setpoint minus the Cooling missive inputs must be satisfied (flow/remote start/stop Range.

  • Page 122: Override To Reduce Cycling

    Unit Operation FORM 150.66-NM2 (906) low the setpoint low limit on the lowest step of capacity, If adding the setpoint adjust value to the setpoint high the micro will close the liquid line solenoid or EEV, after limit causes the setpoint high limit to be greater than turning off hot gas, and pump the system down before 50°F, the setpoint high limit will be set to 50°F, and the turning off the last compressor in a system.

  • Page 123: Anti-Recycle Timer

    FORM 150.66-NM2 (906) cycle off, a compressor within the circuit will not be The EEV pilot solenoid is also used as a low superheat permitted to start until the anti-recycle timer has timed safety device when the EEV is selected as the expan- out.

  • Page 124: Inputs

    Unit Operation FORM 150.66-NM2 (906) Inputs CONDENSER FAN CONTROL Two external inputs to the micro are used to control the (YCAL0012 – YCAL0032 CHILLERS) superheat. These inputs are the suction temperature sen- Condenser fan operation must be programmed with the sor input and the suction pressure transducer input.
  • Page 125 FORM 150.66-NM2 (906) STANDARD CONDENSER FAN CONTROL - YCAL0012 – YCAL0032 TABLE 24 – YCAL0012 – YCAL0032 CONDENSER FAN CONTROL USING OUTDOOR AMBIENT TEMPERA- TURE AND DISCHARGE PRESSURE (DISCHARGE PRESSURE CONTROLS WILL NOT FUNC- TION AND FAN CONTROL WILL BE BASED ON AMBIENT TEMPERATURES ONLY, UNLESS THE OPTIONAL DISCHARGE PRESSURE TRANSDUCER IS INSTALLED).

  • Page 126: Low Ambient Control Option

    Unit Operation FORM 150.66-NM2 (906) YCAL0012-0021 The VFD control signal is sent from a liquid temperature LOW AMBIENT FAN CONTROL OPTION sensor connected to a condenser coil return bend. The sensor is connected to S1 and COM terminals of the VFD General in the control panel.

  • Page 127: Wiring

    FORM 150.66-NM2 (906) Wiring VFD wiring is simple and requires only single phase power in, single phase power out and a 2-wire signal from the liquid line temperature sensor. No start, stop or other alternate power requirements are needed to operate the VFD.

  • Page 128: Programming

    Unit Operation FORM 150.66-NM2 (906) PROGRAMMING YCAL0012 - 0021 Condenser fan control type must be programmed under both the OPTIONS and PROGRAM keys when a VFD is installed on the chiller. Under the OPTIONS key, FAN CONTROL must be programmed for DISCHARGE PRESSURE CONTROL only.

  • Page 129: Low Ambient Control Option

    FORM 150.66-NM2 (906) the inverter will already be running the first fan at full speed. YCAL0025-0032 When discharge pressure falls, the chiller microprocessor will LOW AMBIENT FAN CONTROL OPTION turn the second fan off by de-energizing the fan contactor. General If pressure continues to fall, VFD speed will decrease in an The low ambient option consists of a VFD (Variable Fre- effort to maintain discharge pressure.

  • Page 130: Potentiometers Configuration

    FORM 150.66-NM2 (906) CONFIGURATION (JUMPERS AND POTENTIOMETER SETTINGS POTENTIOMETERS) Each VFD is pre-configured at the factory prior to ship- 180 PSI 25 PSI ping and should be ready for operation when it arrives onsite. A quick check of the settings is recommended. The jumpers must be in the positions shown in the fol- lowing Tabl Chillers built in 2005 and early 2006 were...

  • Page 131: Programming

    FORM 150.66-NM2 (906) 152A 152A 151A 151A 150A 150A TO MICROBOARD (P4) TO MICROBOARD (P4) TO PANEL 7M TO PANEL 7M TO FAN #1 (EXISTING HARNESS) TO FAN #1 (EXISTING HARNESS) FIG. 26 - INVERTER WIRING LD11302a Programming as suggested assures the chiller control LOAD LIMITING points for the second fan in the fan staging sequence Load Limiting is a feature that prevents the unit from...

  • Page 132: Load Limiting

    Unit Operation FORM 150.66-NM2 (906) at a contact closure of 11 seconds. This is the longest TABLE 28 – COMPRESSOR OPERATION – contact closure time allowed. One second is the shortest LOAD LIMITING time allowed and causes the Chilled Liquid Setpoint to COMPRESSORS STAGE 1 STAGE 2...

  • Page 133: Bas/Ems Temperature Reset Option

    The coil of any added relay used for re- New Setpoint = 7.22°C + 6.67°C = 13.89°C set must be suppressed to prevent pos- sible component damage. Use YORK PN 031-00808-000 suppressor. Max Reset Value is the “Max EMS-PWM Remote Temp. Reset” setpoint value described in the programming section under Cooling Setpoints.
  • Page 134 Unit Operation FORM 150.66-NM2 (906) � � 035-15961-000 LD03875a FIG. 27 – FIELD AND FACTORY ELECTRICAL CONNECTIONS OPTIONAL REMOTE TEMPERATURE RESET BOARD JOHNSON CONTROLS...
  • Page 135 FORM 150.66-NM2 (906) This page intentionally left blank. JOHNSON CONTROLS...

  • Page 136: Service And Troubleshooting

    Service and Troubleshooting FORM 150.66-NM2 (906) SERVICE AND TROUBLESHOOTING CLEARING HISTORY BUFFERS Following is the order of outputs that will appear as the The history buffers may be cleared by pressing the HIS- ENTER/ADV key is pressed: TORY key and then repeatedly pressing the UP arrow key until you scroll past the last history buffer choice.

  • Page 137: Service Mode - Inputs

    FORM 150.66-NM2 (906) Following is a list, in order of appearance: The analog inputs will display the input connection, DATA LOGGING MODE = : DO NOT MODIFY the temperature or pressure, and corresponding input DATA LOGGING TIMER = : DO NOT MODIFY voltage such as: SOFT START S Y S...

  • Page 138: Control Inputs/Outputs

    Service and Troubleshooting FORM 150.66-NM2 (906) CONTROL INPUTS/OUTPUTS TABLE 31 – MICROBOARD ANALOG INPUTS J4-10 SYS 1 Suction Transducer Tables 29 through 32 are a quick reference list providing -or- the connection points and a description of the inputs and SYS 1 Low Pressure Switch outputs respectively.

  • Page 139: Microboard Layout

    FORM 150.66-NM2 (906) REAL TIME CLOCK/ BATTERY CLK ON/ JUMPER 00770VIP FIG. 28 – MICROBOARD LAYOUT JOHNSON CONTROLS...

  • Page 140: Checking Inputs And Outputs

    Service and Troubleshooting FORM 150.66-NM2 (906) CHECKING INPUTS AND OUTPUTS TABLE 33 – OUTDOOR AIR SENSOR TEMPERATURE/VOLTAGE/ RESISTANCE CORRELATION DIGITAL INPUTS VOLTAGE Refer to the unit wiring diagram. All digital inputs are TEMP°F (Signal Input TEMP°C connected to J9 of the microboard. The term “digital” re- to Return) fers to two states –...

  • Page 141: Liquid & Refrigerant Sensor Test Points

    FORM 150.66-NM2 (906) TABLE 34 – ENTERING/LEAVING CHILLED Liquid & Refrigerant Sensor Test Points LIQUID TEMP. SENSOR, COOLER INLET (TABLE 34) TEMPERATURE SENSOR, AND SUCTION Entering Chilled Liquid Sensor TEMPERATURE SENSOR: TEMPERA- TURE/VOLTAGE CORRELATION J6-6 = +5VDC regulated supply to sensor. VOLTAGE J6-9 = VDC input signal to the microboard.

  • Page 142: Analog Inputs - Pressure

    Service and Troubleshooting FORM 150.66-NM2 (906) ANALOG INPUTS – Pressure V = (Pressure in PSIG x .01) + .5 Refer to the unit wiring diagram. Pressure inputs are V = (Pressure in BARG x .145) + .5 connected to the microboard on plugs J4 and J7. These analog inputs represent varying dc signals correspond- where V = dc voltage output ing to varying pressures.

  • Page 143: Digital Outputs

    FORM 150.66-NM2 (906) The suction transducers have a range from 0 to 200 DIGITAL OUTPUTS PSIG (13.79 BARG). The output will be linear from .5VDC to 4.5VDC over the 200 PSIG (13.79 BARG) Refer to the unit wiring diagram and FIG. 20. The digi- range.

  • Page 144: Keypad

    Service and Troubleshooting FORM 150.66-NM2 (906) KEYPAD TABLE 35 – KEYPAD PIN ASSIGNMENT MATRIX KEYPAD PIN CONNECTIONS The operator keypad is connected to the microboard STATUS 1 TO 5 by a ribbon cable, which is connected to J2 on the mi- OPER DATA 1 TO 7 croboard.

  • Page 145: Optional Printer Installation

    Obtaining a Printout The part number for the printer that is packaged specifi- cally for YORK is P/N 950915576. The cable to connect A printout is obtained by pressing the “PRINT” key on the printer can either be locally assembled from the parts the keypad and then pressing either the “OPER DATA”...

  • Page 146: Troubleshooting

    4. Short in wire to temp. sensors 4. Unplug connections at or pressure transducers. Microboard to isolate. 5. Defective Microboard 5. Replace Microboard. or Display board. Contact YORK Service before Replacing circuit Boards! “FLOW SWITCH/REM 1. No chilled liquid flow. 1. Check chilled liquid flow.
  • Page 147 FORM 150.66-NM2 (906) TROUBLESHOOTING (CONT’D) PROBLEM CAUSE SOLUTION “LOW SUCTION PRESSURE” 4. TXV defective. 4. Replace TXV. FAULT (CONT’D) 5. Reduced flow of chilled 5. Check GPM (See “Limita tions” liquid through the cooler in Installation section). Check operation of pump, clean pump strainer, purge chilled liquid system of air.
  • Page 148 4. Compressor failure. 4. Diagnose cause of failure and replace. LACK OF COOLING EFFECT 1. Fouled evaporator surface. 1. Contact the local YORK Low suction pressure will service representative. be observed. 2. Improper flow through the 2. Reduce flow to within chiller evaporator.
  • Page 149 FORM 150.66-NM2 (906) THIS PAGE INTENTIONALY BLANK JOHNSON CONTROLS...

  • Page 150: Section 10 - Maintenance

    Note: at shutdown, the oil level can time the chiller is to be off (no power to the microboard) fall to the bottom limit of the oil sight glass. Use YORK for an extended time (weeks/months), the clock should “F”...

  • Page 151: Isn Control

    FORM 150.66-NM2 (906) ISN CONTROL RECEIVED DATA (CONTROL DATA) TABLE 38 – ISN TRANSMITTED DATA The Middle Market receives 8 data values from the CHARACTER TYPE DATA ISN. The first 4 are analog values and the last 4 are PAGE digital values.
  • Page 152 Maintenance FORM 150.66-NM2 (906) ISN CONTROL (CON’T) TABLE 38 – ISN TRANSMITTED DATA (CONT’D) CHARACTER TYPE DATA CHARACTER TYPE DATA PAGE PAGE Digital Spare Coded SYS 1 Liquid Line Coded Spare Digital Solenoid Valve or Coded EEV Pilot Solenoid Unit Control Mode SYS 1 Hot Gas Digital (0=Leaving Water,...

  • Page 153: Isn Operational & Fault Codes

    FORM 150.66-NM2 (906) ISN CONTROL (CON’T) TABLE 39 – ISN OPERATIONAL AND FAULT CODES P56/58 OPERATIONAL CODE P57/59 FAULT CODE NO ABNORMAL CONDITION NO FAULT UNIT SWITCH OFF VAC UNDER VOLTAGE SYSTEM SWITCH OFF LOW AMBIENT TEMPERATURE LOCK-OUT HIGH AMBIENT TEMPERATURE UNIT FAULT LOW LEAVING CHILLED LIQUID TEMP SYSTEM FAULT...

  • Page 154: Recommended Spare Parts

    Page 44, Item 3 Sensor, Leaving Water Temp 025-40273-007 Page 44, Item 5 Transducer, Suction Pressure 025-29583-000 Page 44, Item 6 Transducer, Discharge Pressure 025-29139-001 NOTE: All parts should be purchased from your local YORK Sales and Service Center. JOHNSON CONTROLS...
  • Page 155 FORM 150.66-NM2 (906) NOTES JOHNSON CONTROLS...
  • Page 156 P.O. Box 1592, York, Pennsylvania USA 17405-1592 Tele. 800-861-1001 Subject to change without notice. Printed in USA Copyright © by Johnson Controls 2006 www.york.com ALL RIGHTS RESERVED Form 150.66-NM2 (906) New Release...

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