York YCAS0295EB Installation Operation & Maintenance
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York YCAS0295EB Installation Operation & Maintenance

Air-cooled screw liquid chillers
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AIR-COOLED SCREW LIQUID CHILLERS
New Release
Form 201.19-NM7 (804)
INSTALLATION, OPERATION & MAIN TE NANCE
035-20885-000
YCAS AIR-COOLED LIQUID CHILLERS
YCAS0295EB THROUGH YCAS0605EB
STYLE G
R-407C
50 HZ
028971-G
YCAS 2 SYSTEM EPROM
031-01798-001
(STANDARD, BRINE & METRIC MODELS COM BINED)

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  • Page 1 AIR-COOLED SCREW LIQUID CHILLERS New Release Form 201.19-NM7 (804) INSTALLATION, OPERATION & MAIN TE NANCE 035-20885-000 YCAS AIR-COOLED LIQUID CHILLERS YCAS0295EB THROUGH YCAS0605EB STYLE G R-407C 50 HZ 028971-G YCAS 2 SYSTEM EPROM 031-01798-001 (STANDARD, BRINE & METRIC MODELS COM BINED)
  • Page 2 While YORK makes no com mit ment to update or provide current information au to mat i cal ly to the manual owner, that information, if ap pli ca ble, can be ob tained by con tact ing the nearest YORK Engineered Systems Service offi...
  • Page 3 NOT be installed inside the mi cro pan el. NO external wiring is al lowed to be run through the micro panel. All wir ing must be in ac cor dance with YORK’s pub lished spec i fi ca tions and must be per formed ONLY by qual i fi ed YORK personnel. YORK will not be re spon si ble for dam ag es/problems re sult ing from im prop er con nec tions to the con trols or ap pli ca tion of im prop er con trol sig nals.

  • Page 4: Table Of Contents

    KEYPAD CONTROLS..........20 General Requirements ..........31 Display ..............20 ELECTRICAL CONNECTION ........32 Program ..............21 POWER WIRING............32 ACCESSORIES AND OPTIONS ......... 21 STANDARD UNITS WITH MULTI POINT POWER Multiple Point Power Connection (Standard) ..21 SUPPLY WIRING ............32 YORK INTERNATIONAL...
  • Page 5 PANEL CHECKS ............112 FIRST TIME START-UP..........42 Interlocks .............. 42 PROGRAMMED VALUES......... 112 System Switches...........42 INITIAL START-UP............ 113 Start-up ..............42 CHECKING SUBCOOLING AND SUPERHEAT ..113 Oil Pressure ............42 CHECKING ECONOMIZER SUPERHEAT ..... 114 Refrigerant Flow ..........42 LEAK CHECKING ............. 114 YORK INTERNATIONAL...
  • Page 6 8.9 Service Mode: Unit Setup ......173 3.3 System # Data Keys ........139 8.10 Sensor Calibration Charts......176 3.4 Ambient Temp Key ........139 8.11 Control Inputs/Outputs ....... 177 3.5 % Motor Current key........140 8.12 ISN Control ..........180 YORK INTERNATIONAL...
  • Page 7 SECTION 11 - TROUBLE SHOOTING SECTION 9 - MAINTENANCE TROUBLESHOOTING GUIDE ......... 190 GENERAL REQUIREMENTS ........184 LIMITED WARRANTY YORK AMERICAS CONDENSER COILS ..........184 ENGINEERED SYSTEMS .........192 Chiller / Compressor Operating Log ....185 WARRANTY ON NEW EQUIPMENT ......192 Scheduled Maintenance........
  • Page 8 FIG. 23 – POWER PANEL (SYSTEM #1) SWITCHES ON MICROPROCESSOR COMPONENT LOCATIONS..... 68 BOARD............141 FIG. 24 – CONTROL PANEL COMPONENT FIG. 53 – ELECTRONIC EXPANSION VALVE ..166 LOCATION..........69 FIG. 54 – CONDENSER FAN LAYOUT FOR DXST 2 COMPRESSOR UNITS ..... 171 YORK INTERNATIONAL...

  • Page 9: Section 1 - General Chiller

    WARRANTY • ANSI/ASHRAE Standard 15, Safety Code for Me chan i cal Refrigeration York International warrants all equipment and ma te ri als against defects in workmanship and materials for a pe ri od of eighteen months from deliveryunless extended •...

  • Page 10: Responsibility For Safety

    This manual and any other document supplied with The unit must be grounded. No in stal la tion or main- the unit, are the property of YORK which reserves all te nance work should be attempted on the electrical rights. They may not be reproduced, in whole or in part, equip ment without fi...

  • Page 11: Rotating Parts

    Use of gloves and safety glass es are, however, recommended when working on the unit. The build up of refrigerant vapor, from a leak for ex- YORK INTERNATIONAL...

  • Page 12: Section 2 - Product Description

    INTRODUCTION All exposed power wiring is be routed through liquid- tight, non-metallic conduit. YORK YCAS chillers are designed for water or wa- ter-glycol cooling. All units are designed to be lo cat ed General Description outside on the roof of a building or at ground level.

  • Page 13: Evaporator

    Condenser The fi n and tube condenser coils are manufactured from seamless, internally enhanced, high condensing co ef fi cient, corrosion resistant copper tubes arranged in 00485VIP FIG. 2 – SCREW COMPRESSOR YORK INTERNATIONAL...

  • Page 14: Economizer

    The oil (YORK “L” oil – a POE oil used for all re frig - Power and Control Panel er ant applications), which fl ows back into the com- All controls and motor starting equipment are factory pres sor through a replaceable 0.5 - 3.0 micron oil fi...

  • Page 15: Each Power Compartment Contains

    The software is stored in non-volatile memory (EPROM) to eliminate chiller failure due to AC power failure. The Programmed Setpoints are stored in lithium battery backed memory. YORK INTERNATIONAL...

  • Page 16: Motor Protection Modules (2Ace)

    Communication error. It is recommended that a YORK Ser- Unload imbalance ( > 50%) vice Tech ni cian or the YORK fac to ry Phase Loss (> 60%) Out of range of RLA cal i bra tion. be con sult ed before chang ing these Other symbols Defective module or supply volt age.

  • Page 17: Thermal Overload

    50 millisecond An unloaded compressor condition occurs when any re sponse time. measured half line current is less than the “Operating Additional information on the 2ACE MP module may be found on page 119. YORK INTERNATIONAL...

  • Page 18: Table 1 - Motor Protector Dip Switch Setting

    Code per Phase Plate RLA Value Set 0295 0335 Sys 1 0335 Sys 2 0375 0425 0475 SYS 1 0475 SYS 2 0515 0555 SYS 1 0555 SYS 2 0575 0605 * Indicates one lead/phase through motor protector. YORK INTERNATIONAL...
  • Page 19 Code per Phase Plate RLA Value Set 0295 0335 Sys 1 0335 Sys 2 0375 0425 0475 SYS 1 0475 SYS 2 0515 0555 SYS 1 0555 SYS 2 0575 0605 * Indicates one lead/phase through motor protector. YORK INTERNATIONAL...

  • Page 20: Motor Starting

    3M (SYS 2). Open ing of the 1TR (SYS 1) or 2TR (SYS 2) con tacts deenergizes 1S/2S and clos es the nor mal ly The standard display language is English, with 4 other closed 1S (SYS 1) or 2S (SYS 2) con tacts, en er giz ing languages available. YORK INTERNATIONAL...

  • Page 21: Program

    BAS. with lockable external handles located in the two power A YORK ISN Building Automation System can pro- com part ments. vide a Pulse Width Modulated (PWM) signal direct to...

  • Page 22: Dx Evaporator And Starter Options

    2" (51 mm). Level ad just able, de fl ec tion with each unit. Optional 300 PSIG switch available. may vary slightly by application. (Field- mount ed). Star-Delta Compressor Motor Starter – Provides ap- proximately 65% reduced inrush current compared to across-the-line start (Factory-mounted). YORK INTERNATIONAL...

  • Page 23: Unit Nomenclature

    5 6 7 8 11 12 13 14 15 BASE PRODUCT TYPE NOMINAL CAPACITY UNIT DESIGNATOR REFRIGERANT VOLTAGE/STARTER DESIGN/DEVELOPMENT LEVEL (STYLE) : YORK : 380/3/50 : Design Series G High-EfÞ ciency : R-407C : Engineering : Chiller Standard 0295 : R-22...

  • Page 24: Product Identification Number (Pin)

    EXAMPLES: 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54...

  • Page 25: Section 3 - Handling And Storage

    Units with remote evaporators will have the chiller and Major damage must be reported immediately to your remote evaporator charged with nitrogen. lo cal YORK representative. MOVING THE CHILLER If the unit is to be put into storage, prior to installation,...

  • Page 26: Unit Rigging

    Handling and Storage FORM 201.19-NM7 (804) UNIT RIGGING ✓ 88" (2250mm) CORRECT! CORRECT! ✗ WRONG! WRONG! LD03514 FIG. 3 – UNIT RIGGING WRONG! CORRECT! LD03515 FIG. 4 – LIFTING LUGS YORK INTERNATIONAL...

  • Page 27: Section 4 - Installation

    If the enclosure is of louvered con struc - points. This will allow vibration isolators to be fi tted tion the same requirement of static pres sure loss ap plies if required. as for ducts and at ten u a tors stated above. YORK INTERNATIONAL...

  • Page 28: Compressor Feet Bolt Removal

    DO NOT remove the four 3/8" bolts, 3, mounting the in the Tech ni cal Data Section of this corner brackets, 2, to the frame rails. manual, (page 46). COMPRESSOR BASE SUPPORT RAIL CHANNEL BASE LD09131 FIG. 5 – COMPRESSOR MOUNTING YORK INTERNATIONAL...

  • Page 29: Vibration Isolators

    PSIG) working pres sure and hav ing a 1" N.P.T. con- braces. nection can be obtained from YORK as an ac ces so ry for the unit. Al ter na tive ly a dif fer en tial pres sure switch sited across an orifi...

  • Page 30: Water Treatment

    fl ow to other units. Aerated, brackish or salt water is not recommended for use in the water system(s). YORK recommends that a Thermometer and pressure gauge connections should wa ter treatment specialist is consulted to determine the...

  • Page 31: Pipework Arrangement

    Where cross winds may occur, any ductwork must be sup port ed to prevent side loading on the unit. YORK INTERNATIONAL...

  • Page 32: Electrical Connection

    This will prevent re cir - la tion (not sup plied by YORK). cu la tion of air when only one of the fans is running.

  • Page 33: Remote Emergency Stop Device

    31 and 32 (Figs. 13 and 14, pages 38 and 39.) in the mi cro pro ces sor con trol pan el. Flow Switch A chilled water fl ow switch, (either by YORK or others) MUST be installed in the leaving water piping of the CONTROL PANEL WIRING evaporator.

  • Page 34: Fig. 9 - Power Panel Section

    Installation FORM 201.19-NM7 (804) POWER PANEL LAYOUTS (TYPICAL) 028972-G 028973-G OPTIONAL DISCONNECT SWITCH OPTIONAL CIRCUIT BREAKER SWITCH (WYE-DELTA - TYPICAL) ACROSS THE LINE - TYPICAL) FIG. 9 – POWER PANEL SECTION YORK INTERNATIONAL...

  • Page 35: Fig. 10 - Option Panel Section

    FORM 201.19-NM7 (804) OPTION PANEL LAYOUT (TYPICAL) LOGIC PANEL OPTION PANEL WITH SINGLE POINT TERMINAL BLOCK (OPTIONAL) 00246VIP FIG. 10 – OPTION PANEL SECTION YORK INTERNATIONAL...

  • Page 36: Fig. 11 - Logic Section Layout

    ITEM Microprocessor Board Back of Display I/O Expansion Board #1 Power Supply Board Relay Output Board #1 Relay Output Board #2 Flow Switch & Customer Connection Terminals Circuit Breakers CB1, CB2, CB3 FIG. 11 – LOGIC SECTION LAYOUT YORK INTERNATIONAL...

  • Page 37: Fig. 12 - Logic Section Layout With

    FORM 201.19-NM7 (804) LOGIC SECTION LAYOUT WITH CONTROL PANEL 028976-G FIG. 12 – LOGIC SECTION LAYOUT WITH CONTROL PANEL YORK INTERNATIONAL...

  • Page 38: Fig. 13 - Customer Connections

    System No. 1 Alarm Contacts System No. 2 Run Current Chilled Liquid Circulating Pump Start Temperature System No. 2 Print Alarm Contacts Chiller Run CONNECTION Isolator POINTS FOR Auxiliary EMERGENCY Interlock STOPS LD03502 FIG. 13 – CUSTOMER CONNECTIONS YORK INTERNATIONAL...

  • Page 39: Fig. 14 - Customer Connections

    FORM 201.19-NM7 (804) CUSTOMER CONNECTIONS RELAY BOARDS I/O EXPANSION BOARD TRANSFORMERS SYSTEM CIRCUIT SWITCHES BREAKERS CB1, CB2, CB3 115 VAC SUPPLY CUSTOMER MICROPROCESSOR CONNECTIONS CIRCUIT BOARD (FLOW SWITCH, ALARM, RUN, ETC.) 2028978-G FIG. 14 – CUSTOMER CONNECTIONS YORK INTERNATIONAL...

  • Page 40: Section 5 - Commissioning

    It is important to check that the correct pri ma ry Compressor Oil tapping has been used: To add oil to a circuit - connect a YORK hand oil pump (Part No. 470-10654-000) to the 1/4" oil charging valve With the supply voltage to the unit turned off, remove on the oil separator piping with a length of clean hose the lid to the transformer box.

  • Page 41: Switch Settings

    (off set) is to be used, the maximum reset must be pro- wired into the control panel correctly using shielded grammed by pressing the ‘Remote Reset Temp’ key. (See Section 6.) YORK INTERNATIONAL...

  • Page 42: First Time Start-Up

    After several min utes operation and providing a full charge of re frig - er ant is in the system, the bubbles will disappear and be re placed by a solid column of liquid. Fan Rotation YORK INTERNATIONAL...
  • Page 43 FORM 201.19-NM7 (804) This page intentionally left blank. YORK INTERNATIONAL...

  • Page 44: Section 6 - Operation

    The units are designed to work independently, or in Once the unit has been started, all operations are fully con junc tion with other equipment via a YORK ISN automatic. After an initial period at minimum capacity build ing management system or other automated con- on the lead compressor, the control system will adjust trol sys tem.
  • Page 45 FORM 201.19-NM7 (804) This page intentionally left blank. YORK INTERNATIONAL...

  • Page 46: Section 7 - Technical Data

    LD03504 • Actual Measured ∆P = 12' H • Corrected ∆P = 12'/1.3 = 9.2' H FIG. 16 – GLYCOL CORRECTION FACTORS • From Flow Rate and Pressure Drop Chart, locate ß ow @ 9.2' ≈ 300 GPM YORK INTERNATIONAL...

  • Page 47: Temperature And Flows

    1. For leaving brine temperature below 4.4°C, contact your nearest YORK ofÞ ce for application requirements. 2. For leaving water temperature higher than 13°C, contact the nearest YORK ofÞ ce for application guidelines. 3. The evaporator is protected against freeze-up to -28.8°C with an electrical heater as standard.

  • Page 48: Physical Data

    Minimum Chilled Water Flow Rate, l/s 6.94 7.70 8.58 9.53 10.60 11.67 12.37 13.06 13.63 Maximum Chilled Water Flow Rate, l/s 25.42 25.42 25.42 37.85 42.27 46.87 48.45 48.45 48.45 Water Connections, inches NOTE: 1. Optional 21 Bar Waterside available. YORK INTERNATIONAL...

  • Page 49: Operating Limitations And Sound Power Data

    STANDARD FANS –18 CONDENSER (°C) STANDARD FANS AVAILABLE STATIC HIGH PRESS. FANS OPTION 1 PRESSURE (Pa) HIGH PRESS. FANS OPTION 2 SLOW SPEED FANS ELECTRICAL THREE PHASE 50 Hz (V) * Maximum Ambient w/ High Ambient Kit is 54°C. YORK INTERNATIONAL...

  • Page 50: Electrical Data

    # 6 - 350 (2) 3/0 - 250 23.0 0605EB 2/0 - 500 # 6 - 350 (2) 3/0 - 250 23.0 * “Optional” Circuit Breakers are REQUIRED for units with CE mark. See page 58 for Electrical Data Notes. YORK INTERNATIONAL...
  • Page 51 # 1 - 500 # 6 - 350 (2) 3/0 - 250 23.0 0575EB # 1 - 500 # 6 - 350 (2) 3/0 - 250 23.0 0605EB # 1 - 500 # 6 - 350 (2) 3/0 - 250 23.0 YORK INTERNATIONAL...
  • Page 52 (2) # 2 - 300 (2) 3/0-250 0515EB (2) # 1 - 500 (3) 2/0-400 0555EB (2) # 1 - 500 (3) 2/0-400 0575EB (2) # 1 - 500 (3) 2/0-400 0605EB See page 58 for Electrical Data footnotes. YORK INTERNATIONAL...
  • Page 53 690.0 23.0 0515EB 148.0 267.0 857.0 23.0 148.0 267.0 857.0 23.0 0555EB 188.0 267.0 857.0 23.0 148.0 267.0 857.0 23.0 0575EB 188.0 267.0 857.0 23.0 188.0 267.0 857.0 23.0 0605EB 173.0 267.0 857.0 23.0 173.0 267.0 857.0 23.0 YORK INTERNATIONAL...
  • Page 54 0575EB (2) # 1 - 500 (3) 2/0-400 0605EB (2) # 1 - 500 (3) 2/0-400 Option NOT available for units with CE mark. See page 58 for Electrical Data footnotes. See page 62 for Electrical Data footnotes. YORK INTERNATIONAL...
  • Page 55 FAN DATA 11,12 MODEL X-LRA X-LRA YCAS (EA) (EA) (EA.) (EA) 0295EB 23.0 23.0 0335EB 23.0 23.0 0375EB 23.0 23.0 0425EB 23.0 23.0 0475EB 23.0 23.0 0515EB 23.0 23.0 0555EB 23.0 23.0 0575EB 23.0 23.0 0605EB 23.0 23.0 YORK INTERNATIONAL...
  • Page 56 1. – – – – – – – Dashed Line indicates Field Provided Wiring. 2. The above recommendations are based on the National Electric Code and using copper connectors only. Field wiring must also comply with local codes. YORK INTERNATIONAL...
  • Page 57 FUSE SIZE SWITCH SIZE 115V-1Ø CONTROL POWER SUPPLY (UNITS WITH STANDARD CONTROL CIRCUIT TRANSFORMER) CONTROL RECOMMENDED NON-FUSED NO. OF POWER (MAX LOAD DUAL ELEMENT DISCONNECT COMPRESSORS SUPPLY CURRENT) FUSE SIZE SWITCH SIZE 400V - 50 HZ 6.3A — YORK INTERNATIONAL...

  • Page 58: Electrical Notes

    Factory provided circuit breakers in each motor control center. 11. Consult factory for Electrical Data on units equipped with “High Static Fan” option. 50Hz High Static Fans are 3.5kW each. 12. FLA for each “Low Noise Fan” motor: 380v/50Hz = 4.1A. YORK INTERNATIONAL...
  • Page 59 FORM 201.19-NM7 (804) This page intentionally left blank. YORK INTERNATIONAL...

  • Page 60: Wiring Diagram

    6. Alarm contacts are for annunciating alarm/unit mal func - (Class 2) Connections. See Note 2 tion. Con tacts are rated at 115V, 100VA, re sis tive load only, Terminal Block for YORK Connections Only and must be suppressed at load by user. Wiring and Components by YORK 7.

  • Page 61: Fig. 18 - Wiring Diagram - Across-The-Line Start

    FORM 201.19-NM7 (804) WIRING DIAGRAM ACROSS-THE-LINE START 035 15164 103 Rev F LD09233 FIG. 18 – WIRING DIAGRAM – ACROSS-THE-LINE START YORK INTERNATIONAL...

  • Page 62: Elementary Diagram

    Technical Data FORM 201.19-NM7 (804) ELEMENTARY DIAGRAM LD09234 FIG. 19 – ELEMENTARY DIAGRAM – ACROSS-THE-LINE START YORK INTERNATIONAL...
  • Page 63 BAS in puts on ter mi nals 13 - 19 or TB3, or any oth er ter mi nals, must be sup- pressed with a YORK P/N 031- 00808-000 sup pres sor across the re lay/con tac tor coil.

  • Page 64: Fig. 20 - Wiring Diagram - Wye-Delta Start

    6. Alarm contacts are for annunciating alarm/unit mal func - (Class 2) Connections. See Note 2 tion. Con tacts are rated at 115V, 100VA, re sis tive load only, Terminal Block for YORK Connections Only and must be suppressed at load by user. Wiring and Components by YORK 7.

  • Page 65: Fig. 21 - Elementary Diagram - Wye-Delta Start

    FORM 201.19-NM7 (804) WIRING DIAGRAM WYE-DELTA START LD09236 FIG. 21 – ELEMENTARY DIAGRAM – WYE-DELTA START YORK INTERNATIONAL...

  • Page 66: Fig. 22 - Elementary Diagram - Wye-Delta Start

    Technical Data FORM 201.19-NM7 (804) ELEMENTARY DIAGRAM LD09234 FIG. 22 – ELEMENTARY DIAGRAM – WYE-DELTA START YORK INTERNATIONAL...
  • Page 67 BAS inputs on ter mi nals 13 - 19 or TB3, or any oth er ter mi nals, must be sup- pressed with a YORK P/N 031- 00808-000 sup pres sor across the re lay/con tac tor coil.

  • Page 68: Fig. 23 - Power Panel (System #1)

    Technical Data FORM 201.19-NM7 (804) 035 18672 104 Rev E LD09238 FIG. 23 – POWER PANEL (SYSTEM #1) COMPONENT LO CA TIONS YORK INTERNATIONAL...

  • Page 69: Fig. 24 - Control Panel Component Location

    FORM 201.19-NM7 (804) 035 18672 104 Rev E LD010026 FIG. 24 – CONTROL PANEL COMPONENT LOCATION YORK INTERNATIONAL...

  • Page 70: Fig. 25 - Power Panel (System #2)

    Technical Data FORM 201.19-NM7 (804) 035 18672 104 Rev E LD09240 FIG. 25 – POWER PANEL (SYSTEM #2) COMPONENT LO CA TIONS YORK INTERNATIONAL...
  • Page 71 FORM 201.19-NM7 (804) LEGEND YCAS0295 - YCAS0605 LD09241 YORK INTERNATIONAL...
  • Page 72 Technical Data FORM 201.19-NM7 (804) LD03282 035 15164 102 Rev E LD03283 LD03284 YORK INTERNATIONAL...

  • Page 73: Connection Diagram (System Wiring)

    FORM 201.19-NM7 (804) CONNECTION DIAGRAM (SYSTEM WIRING) LD010030 YORK INTERNATIONAL...

  • Page 74: Compressor Terminal Box

    Technical Data FORM 201.19-NM7 (804) COMPRESSOR TERMINAL BOX LD10029 YORK INTERNATIONAL...
  • Page 75 FORM 201.19-NM7 (804) ELEMENTARY DIAGRAM 035 15164 102 Rev E STARTER CONTROL CIRCUIT LD10028 YORK INTERNATIONAL...
  • Page 76 Technical Data FORM 201.19-NM7 (804) 035 15164 102 ELEMENTARY DIAGRAM Rev E #3/#4 #3/#4 #5/#6 #5/#6 #7/#8 #3/#4 #5/#6 #7/#8 #9/#10 LD06840 YORK INTERNATIONAL...
  • Page 77 FORM 201.19-NM7 (804) This page intentionally left blank. YORK INTERNATIONAL...

  • Page 78: Fig. 26 - Dimensions Ycas0295 - 0375

    Site re stric tions may compromise min i mum clearances indicated below, resulting in un pre dict able air ß ow pat terns and possible di min ished performance. YORK’s unit controls will optimize operation without nui sance high pres sure safety cutout;...

  • Page 79: Dimensions-Ycas0295-Ycas0375

    DIMENSIONS – YCAS0295 - YCAS0375 LD05828A CENTER OF GRAVITY (Alum.) CENTER OF GRAVITY (Cop per) YCAS YCAS 1945 1144 1955 1142 1042 0295 0295 1974 1145 1981 1143 1029 0335 0335 1964 1153 1971 1150 1022 0375 0375 #&" LD05829A YORK INTERNATIONAL...

  • Page 80: Dimensions-Ycas0425-Ycas0575

    Site re stric tions may compromise minimum clearances indicated below, resulting in un pre dict able air ß ow patterns and possible diminished performance. YORK’s unit controls will optimize op er a tion without nuisance high pres sure safety cutout;...
  • Page 81 CENTER OF GRAVITY (Copper) YCAS YCAS 2694 1090 2732 1092 0425 0425 2704 1088 2740 1090 0475 0475 2700 1091 2736 1093 0515 0515 2703 1094 2739 1096 0555 0555 2698 1097 2739 1098 0575 0575 #&" LD05833a YORK INTERNATIONAL...

  • Page 82: Dimensions-Ycas0605

    Site re stric tions may compromise minimum clearances indicated below, resulting in un pre dict able air ß ow patterns and possible diminished performance. YORK’s unit controls will optimize op er a tion without nuisance high pres sure safety cutout;...
  • Page 83 FORM 201.19-NM7 (804) DIMENSIONS – YCAS0605 $"& $"& LD05840a CENTER OF GRAVITY (Alum.) CENTER OF GRAVITY (Copper) YCAS YCAS 3370 1101 3402 1102 1010 0605 0605 LD05841a YORK INTERNATIONAL...

  • Page 84: Technical Data

    (2 m) (1.3 m) LD07011 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. 29 – CLEARANCES YORK INTERNATIONAL...

  • Page 85: Weight Distribution And Isolator Mounting Positions

    Aluminium and Black Fin Condenser Coils LD09472 ALUMINUM FINS WEIGHT DISTRIBUTION (kgs.) BY MODEL MODEL Total YCAS0295 – – 4,349 YCAS0335 – – 4,551 YCAS0375 1,017 – – 4,674 YCAS0425 5,933 YCAS0475 6,015 YCAS0515 6,092 YCAS0555 6,115 YCAS0575 6,145 YCAS0605 6,563 YORK INTERNATIONAL...

  • Page 86: Fig. 30 - Cp-2-Xx

    Purple CP-2-27 1,500 680.4 1.06 26.9 Orange CP-2-28 1,800 816.4 1.02 25.9 Green CP-2-31 2,200 997.9 0.83 21.0 Gray CP-2-32 2,600 1,179.3 0.74 18.7 White CP-2-35 3,000 1,360.8 0.70 17.7 Gold ISOLATOR DETAILS LD01089 FIG. 30 – CP-2-XX YORK INTERNATIONAL...

  • Page 87: Fig. 31 - Isolator Details

    2,300 1,043.3 AWMR-2-531 2,552 1,157.6 AWMR-2-532 3,000 1,360.8 LD02973 LD02974 AWMR-1-XXX AWMR-2-XXX DIMENSIONS - In. AWMR-1 10-1/2 3-1/2 1-3/4 8-1/2 4-1/4 10-1/2 11NC 50-553 AWMR-2 7-1/2 3-3/4 9-1/2 14-1/2 7-1/4 10NC 50-553 FIG. 31 – TYPE AWMR ISOLATOR DETAILS YORK INTERNATIONAL...
  • Page 88 (499.4) (158.7)(117.6) (41.4) (69.8) (76.2) (12.7) (127.0) (14.4) (9.6) RD-4 BLACK 1,500 (681.0) 2,250 (1,021.5) 0.25 0.50 * HD dimension applies to double defl ection Type RD mountings only. GREEN 3,000 (1,362.0) (6.3) (12.7) RD-4 GRAY 4,000 (1,816.0) YORK INTERNATIONAL...
  • Page 89 COPPER FIN WEIGHT DISTRIBUTION (kgs.) BY MODEL MODEL Total YCAS0295 1,032 —- —- 4,757 YCAS0335 1,054 1,008 —- —- 4,960 YCAS0375 1,096 1,034 —- —- 5,083 YCAS0425 6,505 YCAS0475 6,587 YCAS0515 6,664 YCAS0555 6,687 YCAS0575 6,716 YCAS0605 7,255 YORK INTERNATIONAL...

  • Page 90: Fig. 32 - Cp-2-Xx

    Purple CP-2-27 1,500 680.4 1.06 26.9 Orange CP-2-28 1,800 816.4 1.02 25.9 Green CP-2-31 2,200 997.9 0.83 21.0 Gray CP-2-32 2,600 1179.3 0.74 18.7 White CP-2-35 3,000 1360.8 0.70 17.7 Gold ISOLATOR DETAILS LD01089 FIG. 32 – CP-2-XX YORK INTERNATIONAL...

  • Page 91: Fig. 33 - Isolator Details

    2,300 1,043.3 AWMR-2-531 2,552 1,157.6 AWMR-2-532 3,000 1,360.8 LD02974 LD02973 AWMR-1-XXX AWMR-2-XXX DIMENSIONS - In. AWMR-1 10-1/2 3-1/2 1-3/4 8-1/2 4-1/4 10-1/2 11NC 50-553 AWMR-2 7-1/2 3-3/4 9-1/2 14-1/2 7-1/4 10NC 50-553 FIG. 33 – TYPE AWMR ISOLATOR DETAILS YORK INTERNATIONAL...
  • Page 92 (499.4) (158.7)(117.6) (41.4) (69.8) (76.2) (12.7) (127.0) (14.4) (9.6) RD-4 BLACK 1,500 (681.0) 2,250 (1021.5) 0.25 0.50 * HD dimension applies to double defl ection Type RD mountings only. GREEN 3,000 (1362.0) (6.3) (12.7) RD-4 GRAY 4,000 (1816.0) YORK INTERNATIONAL...
  • Page 93 ALUMINUM FIN COIL (WITH SILENCER KIT) WEIGHT DISTRIBUTION (kgs.) BY MODEL MODEL Total YCAS0295 1,032 —- —- 4,757 YCAS0335 1,054 1,008 —- —- 4,960 YCAS0375 1,096 1,034 —- —- 5,083 YCAS0425 6,505 YCAS0475 6,587 YCAS0515 6,664 YCAS0555 6,687 YCAS0575 6,716 YCAS0605 7,255 YORK INTERNATIONAL...

  • Page 94: Fig. 34 - Cp-2-Xx

    Purple CP-2-27 1,500 680.4 1.06 26.9 Orange CP-2-28 1,800 816.4 1.02 25.9 Green CP-2-31 2,200 997.9 0.83 21.0 Gray CP-2-32 2,600 1179.3 0.74 18.7 White CP-2-35 3,000 1360.8 0.70 17.7 Gold ISOLATOR DETAILS LD01089 FIG. 34 – CP-2-XX YORK INTERNATIONAL...

  • Page 95: Fig. 35 - Isolator Details

    1043.3 AWMR-2-531 2,552 1157.6 AWMR-2-532 3,000 1360.8 LD02974 LD02973 AWMR-1-XXX AWMR-2-XXX DIMENSIONS - In. AWMR-1 10-1/2 3-1/2 1-3/4 8-1/2 4-1/4 10-1/2 11NC 50-553 AWMR-2 7-1/2 3-3/4 9-1/2 14-1/2 7-1/4 10NC 50-553 FIG. 35 – TYPE AWMR ISOLATOR DETAILS YORK INTERNATIONAL...
  • Page 96 (499.4) (158.7)(117.6) (41.4) (69.8) (76.2) (12.7) (127.0) (14.4) (9.6) RD-4 BLACK 1,500 (681.0) 2,250 (1021.5) 0.25 0.50 * HD dimension applies to double defl ection Type RD mountings only. GREEN 3,000 (1362.0) (6.3) (12.7) RD-4 GRAY 4,000 (1816.0) YORK INTERNATIONAL...
  • Page 97 COPPER FIN WITH OPTIONAL SILENCER KIT WEIGHT DISTRIBUTION (kgs.) BY MODEL MODEL Total YCAS0295 1,115 1,073 —- —- 5,274 YCAS0335 1,137 1,092 —- —- 5,477 YCAS0375 1,178 1,119 —- —- 5,600 YCAS0425 7,158 YCAS0475 7,240 YCAS0515 7,317 YCAS0555 7,340 YCAS0575 7,370 YCAS0605 1,007 1,034 1,004 1,032 1,060 8,044 YORK INTERNATIONAL...

  • Page 98: Fig. 36- Cp-2-Xx

    Purple CP-2-27 1,500 680.4 1.06 26.9 Orange CP-2-28 1,800 816.4 1.02 25.9 Green CP-2-31 2,200 997.9 0.83 21.0 Gray CP-2-32 2,600 1179.3 0.74 18.7 White CP-2-35 3,000 1360.8 0.70 17.7 Gold ISOLATOR DETAILS LD01089 FIG. 36 – CP-2-XX YORK INTERNATIONAL...

  • Page 99: Fig. 37 - Isolator Details

    1043.3 AWMR-2-531 2,552 1157.6 AWMR-2-532 3,000 1360.8 LD02974 LD02973 AWMR-1-XXX AWMR-2-XXX DIMENSIONS - In. AWMR-1 10-1/2 3-1/2 1-3/4 8-1/2 4-1/4 10-1/2 11NC 50-553 AWMR-2 7-1/2 3-3/4 9-1/2 14-1/2 7-1/4 10NC 50-553 FIG. 37 – TYPE AWMR ISOLATOR DETAILS YORK INTERNATIONAL...
  • Page 100 (499.4) (158.7)(117.6) (41.4) (69.8) (76.2) (12.7) (127.0) (14.4) (9.6) RD-4 BLACK 1,500 (681.0) 2,250 (1021.5) 0.25 0.50 * HD dimension applies to double defl ection Type RD mountings only. GREEN 3,000 (1362.0) (6.3) (12.7) RD-4 GRAY 4,000 (1816.0) YORK INTERNATIONAL...

  • Page 101: Installation Instructions For Vmc Series Awr/Awmr And Cp Restrained Mountings

    1/4" shim be tween the upper load plate and vertical up rights. Lower the equip ment on the blocking or shimmed isolators. Complete piping and fi ll equipment with wa ter, re frig er ant, etc. YORK INTERNATIONAL...

  • Page 102: Fig. 38 - Refrigerant Flow Diagram

    The high pressure oil-free vapor is fed to the ing to the evaporator. air cooled condenser coil where the heat is re moved. On economized models, the fully con densed liquid enters the econ o miz er. YORK INTERNATIONAL...

  • Page 103: Fig. 39 - Process And Instrumentation Diagram

    DIFFERENTIAL PRESSURE CUTOUT CONDENSER COIL COOLER DISCHARGE PRESSURE FAN CONTROL DISPLAY VALUE OIL COOLER COIL HIGH PRESSURE LOAD LIMITING OIL SEPARATOR HIGH TEMPERATURE CUTOUT LOW PRESSURE CUTOUT LOW TEMPERATURE CUTOUT SUPERHEAT VALVE LD09429 FIG. 39 – PROCESS AND INSTRUMENTATION DIAGRAM YORK INTERNATIONAL...

  • Page 104: Component Locations

    HIGH PRESSURE CUT-OUT LD07012 - STS SUCTION TEMPERATURE SENSOR - RFTS REFRIGERANT FEED TEMPERATURE SENSOR (R407C only) - XCMTB COMPRESSOR MOTOR TERMINAL BOX - YELSSV ECONOMIZER LIQUID SUPPLY SOLENOID VALVE - ZCPR COMPRESSOR FIG. 40 – COMPONENT LOCATIONS YORK INTERNATIONAL...

  • Page 105: Compressor Components

    OIL FILTER LOCKING BOLT COVER PLATE OIL FILTER BLEED & EVACUATION POINT LIFTING LUG THREADED HOLE HEATER ECONOMIZER GAS IN DISCHARGE CASE DISCHARGE GAS OUT EVACUATION PORT OIL INLET FROM CONDENSER LD03668 COOLING COIL FIG. 41 – COMPRESSOR COMPONENTS YORK INTERNATIONAL...

  • Page 106: Fig. 42 - Compressor Components

    Technical Data FORM 201.19-NM7 (804) COMPRESSOR COMPONENTS – CONT’D LD03669 FIG. 42 – COMPRESSOR COMPONENTS YORK INTERNATIONAL...

  • Page 107: Fig. 43 - Compressor Components

    FORM 201.19-NM7 (804) COMPRESSOR COMPONENTS – CONT’D LD03670 FIG. 43 – COMPRESSOR COMPONENTS YORK INTERNATIONAL...

  • Page 108: Fig. 44 - Compressor Components

    Technical Data FORM 201.19-NM7 (804) COMPRESSOR COMPONENTS – CONT’D O-RING OIL FILTER OIL FILTER MALE ROTOR DISCHARGE CHECK VALVE RELIEF VALVE LD06079 FIG. 44 – COMPRESSOR COMPONENTS YORK INTERNATIONAL...

  • Page 109: Fig. 45 - Compressor Components

    BEARING CLAMP NUT REVERSE THRUST BEARING THRUST SPACER SHIM THRUST BEARINGS SPACER SHIM DISCHARGE RADIAL BEARING LIP SEAL DOWEL PIN SUPPORT RING ECONOMIZER PLUG SUPPORT RING FEMALE ROTOR RETAINING RING FEMALE INLET BEARING LD03673 FIG. 45 – COMPRESSOR COMPONENTS YORK INTERNATIONAL...

  • Page 110: Fig. 46 - Compressor Components

    FORM 201.19-NM7 (804) COMPRESSOR COMPONENTS – CONT’D MOTOR ROTOR / MALE ROTOR LOCKING KEY O-RING MALE ROTOR SLIDE VALVE RELIEF O-RING RETURN VALVE SPRING FEMALE ROTOR ECONOMIZER SLIDE VALVE SUPPORT PLUG RINGS LD03672 FIG. 46 – COMPRESSOR COMPONENTS YORK INTERNATIONAL...

  • Page 111: Unit Checks (No Power)

    4 or 8 o’clock po si - If it is necessary to add oil, con nect a YORK oil tions. pump to the charging valve on the oil sep a ra tor, 15.Assure that the 15 ton economizer TXV bulbs...

  • Page 112: Panel Checks

    Check them off in the chart above. and record the values below: Damage to the chiller could result Refrigerant Type = __________________________ if switch es are im prop er ly pro- grammed. R407C Chiller Type = ________________________ Unit Type = _______________________________ YORK INTERNATIONAL...

  • Page 113: Initial Start-Up

    Liq Line Temp = °F (°C) lubrication chang ing from liq uid re frig er ant to Subcooling = °F (°C) oil. This should be of no con cern and lasts for only a short time. YORK INTERNATIONAL...

  • Page 114: Checking Economizer Superheat

    If the unit is functioning satisfactorily during the initial Converted to Temp = °F (°C) operating period, no safeties trip and the compressors Superheat = °F (°C) load and unload to control water temperature, the chill er is ready to be placed into operation. YORK INTERNATIONAL...
  • Page 115 FORM 201.19-NM7 (804) This page intentionally left blank. YORK INTERNATIONAL...

  • Page 116: Chiller Control Panel Programming And Data Access Keys

    This switch shuts down the entire chiller when placed in the OFF position. The switch must be ON for the chiller to operate. The systems will not pump down at shutdown when the UNIT switch is switched off. YORK INTERNATIONAL...

  • Page 117: Introduction & Physical Description

    The YORK Screw Chiller Control Panel is a mi cro pro - ces sor based control system fi tted to YCAS liq uid chill- YCAS chillers each have a single split circuit evap o - ers.

  • Page 118: 1.3 Unit (Chiller) On / Off Switch

    Transformer outputs (motor current signals from the 2ACE Module), and Oil Temperature. The battery is a 10 year lithium type, but life will de pend upon whether the Real Time Clock’s internal clock YORK INTERNATIONAL...

  • Page 119: 1.6 Circuit Breakers

    This is a non-adjustable pro tec tion cir cuit electronically sized to a system's mo- tor spec i fi ca tions. YORK INTERNATIONAL...
  • Page 120 M1-M2 contacts open, the Micro will record the last 2 faults of "Low Curr/MP/ HP". Hence, the third (3rd) history buffer will show data related to the true cause. See page 133 for additional fault data. YORK INTERNATIONAL...

  • Page 121: Fig. 47 - Motor Protection Module

    SWITCH PUSHED TO LEFT INDICATES SIDE VIEW SWITCHES PLACED IN THE ON POSITION ADD TO EQUAL THE OVERLOAD SETTING VALUE. FOR EXAMPLE, WITH 2 ON AND 128 ON, DISPLAY WILL FLASH HA130. FIG. 47 – MOTOR PROTECTION MODULE YORK INTERNATIONAL...

  • Page 122: Ems/Bas Controls

    After an offset signal, the new Re mote sup pres sor YORK Part Number 031- Current Limit may be viewed on the 00808-000 across the in duc tive coil.
  • Page 123 Offset 10 sec the coil of the de vice must be sup pressed with a sup pres sor YORK Part Num ber For example, with a programmed setpoint of 44°F (7°C), 031-00808-000 across the in duc tive after a 4 second pulse and a programmed maximum off set of 40°F (22°C), the temperature offset would equal:...

  • Page 124: Microprocessor Board Layout

    NOTE : Dimple is positioned at top edge (3A) Dip Switch Set (8 switches) System Switches S2 = System 1 S3 = System 2 S2 to S5 S4 = System 3 S5 = System 4 FIG. 48 – COMPONENT LAYOUT YORK INTERNATIONAL...

  • Page 125: Logic Section Layout

    DESCRIPTION Microprocessor Board Back of Keypad I/O Expansion Board # 1 Power Supply Board Relay Output Board #1 Relay Output Board #2 Flow Switch & Customer Connection Terminals (TB4) Circuit Breakers (115V) FIG. 49 – LOGIC SECTION LAYOUT YORK INTERNATIONAL...

  • Page 126: Anti-Recycle Timer

    Supply Solenoid Valve is de-energized. The compressor If the Daily Schedule is not used, (On/Off times equal 00:00) the contacts will be closed at all times. Remote evaporator applications equipped with thermostatic TXV and Liquid Line solenoid will also pump down on shutdown. YORK INTERNATIONAL...

  • Page 127: Alarms

    RC waiting to restart, SYS switch on the microboard sup pres sor YORK Part Num ber 031- is off, or a run permissive is keeping an individual 00808-000 across the in duc tive coil.

  • Page 128: Economizer Solenoid Control

    The micro utilizes the formula below to compute pres- sure ratio: PR = (DP in PSIG)+14.7 (SP in PSIG)+14.7 YORK INTERNATIONAL...

  • Page 129: Fig. 50 - Process And Instrumentation Diagram

    FORM 201.19-NM7 (804) PROCESS AND INSTRUMENTATION DIAGRAM ECONOMIZER HX LD03486 FIG. 50 – PROCESS AND INSTRUMENTATION DIAGRAM YORK INTERNATIONAL...

  • Page 130: Status Key: General Status Messages & Fault Warnings

    S Y S C O M P R U N N I N G applicable to represent the system number where mes- sag es apply to individual systems. This message indicates that the respective compressor is running due to demand. YORK INTERNATIONAL...

  • Page 131: Unit Warnings

    Once a low battery condition is detected, the only way to run the chiller is to use the Manual Override key - see Section 8.7.4 page 159. This al lows re pro gram ming of setpoints, cutouts, and sched ule. YORK INTERNATIONAL...

  • Page 132: Anticipation Control Status

    Therefore, "Automatic" is typically or if ex treme ambient or load conditions occur. See selected and programmed under the Anticipatory Unloading Controls Page 155 for detailed PROGRAM key. See page 164. operation. YORK INTERNATIONAL...

  • Page 133: Unit Fault Status Messages

    This the chill er must be manually reset. See Section 8.2 feature is programmable and can also be used to shut (page 164). down the chiller at a temperature where continued run- YORK INTERNATIONAL...

  • Page 134: System Fault (Safety) Status

    Fail ure to repair the cause of the fault while manually al low ing re pet i tive re starts may cause fur ther ex pen sive damage to the system. YORK INTERNATIONAL...

  • Page 135: Fig. 51 - Suction Pressure Cutout

    130 - 150°F (54 - 66°C). The High Oil Temperature Safety is activated after 2 minutes of compressor operation, after which if oil tem per a ture is above 225°F (107°C) for more than 3 sec onds, the compressor will shut down. YORK INTERNATIONAL...
  • Page 136 This may result from loss of re frig er ant, a de- fective contactor, power problems, or from a compressor that is not pumping due to a mechanical malfunction. YORK INTERNATIONAL...

  • Page 137: Printout On Fault Shutdown

    The Low Evaporator Temperature Cutout is to pro tect the evaporator from freeze-up with R-407C. This safety uses the Evaporator Inlet Refrigerant Temp Sen sors to mon i tor evaporator inlet refrigerant tem per a ture on each system. These sensors are only installed on R- YORK INTERNATIONAL...

  • Page 138: Display Keys & Option Switches

    M C H L T 4 3 . 8 ° the values which are being displayed, but are outside the ability of the micro to give an actual reading. This YORK INTERNATIONAL...

  • Page 139: System # Data Keys

    Display Limits: Minimum - 4.6°F (-20.3°C) valve solenoid in the form of a voltage signal. To the Maximum 137.9°F (58.8°C) mi cro pro ces sor, STEP 0 = fully unloaded and STEP 75 = fully loaded. YORK INTERNATIONAL...

  • Page 140: Motor Current Key

    Cutout setting at 25°F (-4°C) and is not ad just able. The Options key provides a display of op tions which are programmed by the po si tions of the S1 Dip Switch es on the Mi cro pro ces sor Board. Proper pro gram ming of YORK INTERNATIONAL...

  • Page 141: Fig. 52 - Enlarged Photograph Of Dip Switches On Microprocessor Board

    Place the switch in the CLOSED position selects the type of chiller as an air cooled chiller (YCAS). The DO NOT USE THIS POSITION. switch MUST always be in the CLOSED position. Nuisance trips at start-up could result. Incorrect programming may cause damage to the chiller. YORK INTERNATIONAL...

  • Page 142: Function Key

    E L E C T R O N I C The following keys can be scrolled using the Function Placing the switch in the CLOSED position, confi gures Key: Chilled Liquid Temps, System # Data, Motor Cur- rent and Options. YORK INTERNATIONAL...

  • Page 143: Print Keys

    This message shows the time remaining on the Load Timer and the Unload Timer. These Timers constantly recycle and are used in conjunction with “rate control” and “temperature deviation from setpoint” to de ter mine when loading/unloading should occur. YORK INTERNATIONAL...
  • Page 144 0 steps equals minimum capacity and 75 steps Center (remote mode). equals fully loaded. PWM CURR – EMS PWM Current Limiting Enabled PWM TEMP – EMS PWM Temp. Reset Enabled CUR/TEMP – EMS PWM Current Limiting & Temperature Reset Enabled YORK INTERNATIONAL...

  • Page 145: Operating Data - Remote Printout

    3 - 4 8 - 1 7 D - H - M - S This message displays the accumulated Run Time since YORK INTERNATIONAL CORPORATION the last start in Days (D), Hours (H), Minutes (M), and MILLENNIUM SCREW CHILLER Seconds (S).

  • Page 146: History Key

    No. 1. After the ENTER Key is pressed, a mes sage in- dicating the time and date of the Fault Shut down will appear: S H U T D O W N O C C U R R E D 5 : 5 9 A M N O V YORK INTERNATIONAL...
  • Page 147 1 0 0 % F L A This message indicates whether heat recovery is dis- This message shows the programmed %FLA Motor abled or enabled. (HEAT RECOVERY MUST BE Current Unload at the time of the fault. DISABLED) YORK INTERNATIONAL...
  • Page 148 This message indicates the compressor motor current in S Y S T E M N U M B E R amps and as a percentage of Full Load Amps. This message indicates which system was in the lead at the time of the fault. YORK INTERNATIONAL...
  • Page 149 R E F R I G T E M P 2 8 . 2 ° F This message, which is only displayed if the unit is in R-407C mode, indicates the refrigerant temperature at the inlet of the evaporator. YORK INTERNATIONAL...

  • Page 150: Fault History Data - Remote Printout

    ECONOMIZER TXV SOLENOID An example of the HISTORY Printout is shown be- CONDENSER FAN STAGE low: COMPRESSOR HEATER WYE-DELTA RELAY YORK INTERNATIONAL CORPORATION SYSTEM 2 DATA MILLENNIUM SCREW CHILLER COMPRESSORS STATUS SAFETY SHUTDOWN NUMBER 1 RUN TIME 0- 0-15-26 D-H-M-S...

  • Page 151: Entry Keys

    “AM” or “PM” on the display. For ex- original values will be returned. am ple, pressing the " key when the cursor is on “PM” changes it to “AM.” YORK INTERNATIONAL...

  • Page 152: Setpoints Keys & Chilled Liquid Control

    (+ or - Range) This devia- amount of loading necessary to cool the chilled liq uid tion is simply called the “Control Range” and is best YORK INTERNATIONAL...
  • Page 153 Load Timers are always set at 10 seconds be tween the op po site di rec tion against oil pres sure to de crease changes. ca pac i ty. • Unload Timers are set at 5 seconds between chang- YORK INTERNATIONAL...
  • Page 154 CR/4 be low the low lim it of the Con trol Range. In the case of Saturated suction temperature, the micro limits loading based on saturated suction temperature dropping toward the point of unloading. In the water YORK INTERNATIONAL...
  • Page 155 In the water cooling mode, the saturated suction tempera- ture unload point is 24ºF (-4.42ºC) In the glycol cooling YORK INTERNATIONAL...

  • Page 156: Local Cooling Setpoints Key

    ENTER Key to store the data in memory. Failure to press the Enter key will cause the new ly programmed values to be ig nored and not en tered into mem o ry. YORK INTERNATIONAL...

  • Page 157: Clock Keys

    Press ENTER to move on to the hour part of the display. Next, key in the time (hours/minutes) using a leading Press ing the Set Time key a second time enters “display” mode in which the cursor will dis ap pear and the “live” clock will be dis played. YORK INTERNATIONAL...

  • Page 158: Set Schedule / Holiday Key

    ON position, all 00.00s should be programmed into the oc ca sion al ly. daily schedule. This can be done manually for in di vid u al days or for all days by pressing Cancel and En ter for the Monday Start/Stop schedule. YORK INTERNATIONAL...

  • Page 159: 7.4 Manual Override Key

    See also Section 2.5. only active for a period of 30 min utes and the fol low ing sta tus message will be ob served: M A N U A L O V E R R I D E YORK INTERNATIONAL...

  • Page 160: Program Key

    Enter key is exceeded for 3 seconds, the system will shut down. is pressed and the display will scroll on to the next pro- Normally, air-cooled chillers, such as YCAS chillers, gram ma ble value. YORK INTERNATIONAL...
  • Page 161 PSIG (3 bar) for R22 and R-407C are recommended. If the Switch is set for “Brine Cooling” (glycol) the cut out is programmable between 5 - 70 PSIG (0.3 bar) for R22 and R-407c models. In this mode, the cutout should be YORK INTERNATIONAL...
  • Page 162 The chiller will not operate below per a ture, and condenser malfunction caused by dirt or 0ºF (-17.8ºC). fan prob lems. YORK INTERNATIONAL...
  • Page 163 Enter key to store the value into The !" keys are used to change from Automatic to memory and scroll to the next display. Manual lead/lag. The ENTER key must be pressed to save the selection in memory. YORK INTERNATIONAL...

  • Page 164: Programming "Default" Values

    This al lows quick start-up pro gram ming for typical chilled wa ter ap pli ca tions. To program the default values into memory, fi rst press the PROGRAM key followed by the ENTER key, to pro gram the “refrigerant type” . YORK INTERNATIONAL...
  • Page 165 Imperial Lead / Lag Control Mode Automatic Power Failure Restart Mode Automatic Motor Current Averaging Cutout 30% FLA 110% FLa 70 % FLA 9.0 ºF 15.0 ºF 12.0 ºF Suction Superheat Setpoint 5.0 ºC 8.3 ºC 6.6 ºC YORK INTERNATIONAL...

  • Page 166: 8.4 Electronic Expansion Valve

    The purpose of the EEV is to meter a fl ow of liquid refrigerant into the evaporator to maintain a superheat 120 VAC PILOT SOLENOID EXPANSION VALVE 24 VAC HEAT MOTOR LD09132 FIG. 53 – ELECTRONIC EXPANSION VALVE YORK INTERNATIONAL...

  • Page 167: 8.5 Eev Operation

    fi rst. is the PWM per cent age that will be sent to the ETRE heat motor. This PWM output is the percentage of a 1 second pe ri od that the 24VAC heat motor power signal is energized. YORK INTERNATIONAL...
  • Page 168 ECONOMIZER TXV SOLENOID OFF(YCAS) S Y S S E N S O R F A I L U R E OIL COOLING SOLENOID OFF(YCWS) HEAT RECOVERY SOLENOID OFF(B HR) DISCHARGE COOLING SOLENOID OFF(EC,LT) CONDENSER FAN STAGE COMPRESSOR HEATER WYE-DELTA RELAY YORK INTERNATIONAL...

  • Page 169: 8.6 Eev Programming

    The Expansion Valve type selection is viewable un der the OP TIONS key. TABLE 2 – PROGRAMMABLE VALUES TABLE (MINIMUM/MAXIMUM) PROGRAM VALUE MODE LOW LIMIT HIGH LIMIT DEFAULT ° ° ° 15.0 12.0 SUPERHEAT SETPOINT ° ° ° (5.0 (8.3 (6.6 YORK INTERNATIONAL...

  • Page 170: 8.7 Eev Troubleshooting

    EEV output. · If everything checks out, it is possible that the EEV has failed. If the small charge in the bulb leaks, the valve will not be able to open and the entire EEV must be replaced. YORK INTERNATIONAL...

  • Page 171: 8.8 Condenser Fan Control

    DP and OAT requirements are met. For example, if a system is at a fan stage of 4, and the DP falls under 205 PSIG and the OAT drops below 75ºF (24ºC), the fan stage will be reduced to 3. YORK INTERNATIONAL...

  • Page 172: Table 3 - Condenser Fan Control And Fan Contactor

    15M, 16M, 17M, 18M, & 19M * Sys 1 Outputs are on Relay Board #1 ** At ambients above 85ºF, Stages 3, 4 and 5 will both turn on at 240 PSIG. Sys 2 Outputs are on Relay Output Board #2 YORK INTERNATIONAL...

  • Page 173: 8.9 Service Mode: Unit Setup

    C.T. The C.T. is built internally into the 2ACE motor protector. ** The chiller must always be programmed for YCAS *** Heat recovery must always be disabled. **** Oil and discharge cooling is only utilized on spe- cial low temp chiller. YORK INTERNATIONAL...

  • Page 174: Table 6 - Ycas Style G, Across The Line Start

    3.44 0335 SYS 2 2.38 0375 3.44 0425 3.18 0475 SYS 1 4.44 0475 SYS 2 3.18 0515 4.44 0555 SYS 1 3.27 0555 SYS 2 4.44 0575 3.27 0605 3.00 * Indicates one lead/phase through motor protector. YORK INTERNATIONAL...
  • Page 175 (ON and OFF). An example is shown below: S Y S L L S V J 7 - 3 O F F YORK INTERNATIONAL...

  • Page 176: 8.10 Sensor Calibration Charts

    TEST POINTS: Suction Pressure: System 1: ............Microboard J13-7/1 System 2: ............Microboard J14-7/1 Oil Pressure: System 1: ............Microboard J13-8/3 System 2: ............Microboard J14-8/3 Discharge Pressure: System 1: ............Microboard J15-8/3 System 2: ............Microboard J15-7/1 YORK INTERNATIONAL...

  • Page 177: 8.11 Control Inputs/Outputs

    SPARE Microboard / Relay Board 2 J8-5 / TB1-6/5 Evaporator Pump Microboard / Relay Board 2 J8-6 / TB1-4/3 Sys 2 Alarm I/O Expansion J13-1 Sys 1 EEV Heat Motor I/O Expansion J13-2 Sys 2 EEV Heat Motor YORK INTERNATIONAL...

  • Page 178: Table 9 - Analog Inputs

    I/O Expansion J9-2 Sys 2 Fan Pressure Transducer (Heat Recovery only) I/O Expansion J10-6 Sys 2 Oil Temp Sensor I/O Expansion J10-7 Sys 1 Oil Temp Sensor I/O Expansion J11-2 Sys 1 Evaporator Inlet Refrigeration Temp Sensor (R-407c only) YORK INTERNATIONAL...

  • Page 179: Table 10 - Digital Inputs

    Hot Flow Switch (Heat Recovery only) ANALOG OUTPUTS Table 11 lists all the analog outputs and what output board they are on. TABLE 11 - ANALOG OUTPUTS I/O Expansion J2-1 Sys 1 Slide Valve I/O Expansion J12-1 Sys 2 Slide Valve YORK INTERNATIONAL...

  • Page 180: 8.12 Isn Control

    44-47 Sys 1 Discharge Pressure 48-51 Sys 1 % Full Load Amps 52-55 Sys 1 Total Run Hours 56-59 Sys 1 Total Number of Stats 60-63 Sys 1 Anti-Recycle Timer 64-67 Anti-Coincident Timer 68-71 Sys 2 Oil Temperature YORK INTERNATIONAL...
  • Page 181 *Sys 1 Fault Code *Sys 2 Operatioanal Code *Sys 2 Fault Code Sys 1 Slide Valve Step Sys 1 Condenser Fan Stages Running (0-6) Sys 2 Slide Valve Step Sys 2 Condenser Fan Stages Running (0-6) Lead Compressor Number Debug Code YORK INTERNATIONAL...
  • Page 182 Cooling Range 174-177 Sys 1 Discharge Superheat 178-181 Sys 2 Suction Temperature 182-185 Sys 2 Discharge Temperature 186-189 Sys 2 Suction Superheat 190-193 Sys 2 Discharge Superheat Digital S1-7 Expansion Valve Type: 0=TXV, 1=EEV S1-8 SPARE — — — YORK INTERNATIONAL...

  • Page 183: Table 14 - Isn Operational And Fault Codes

    * The operational and fault codes are defi ned in table 14. Note that this table of fault and operational codes is for all DX products. The codes that are grayed out are not used on this unit. YORK INTERNATIONAL...

  • Page 184: Section 9 - Maintenance

    YORK Service Agent. for these regular maintenance requirements and/or en ter into a maintenance agreement with a York In ter na tion al Unit Status: Press the ‘STATUS’ key on the keypad ser vice organization to protect the operation of the unit.

  • Page 185: Chiller / Compressor Operating Log

    Nor mal ly a ‘minor’ service should be carried out every three to six months and a ‘major’ service once a year. It is recommended that your local YORK Service Cen ter is contacted for recommendations for in di vid u al sites. ON-BOARD BATTERY BACK-UP U17 is the Real Time Clock chip that maintains the date/ time and stores customer programmed setpoints.
  • Page 186 YORK Order No. ________________________ CHILLER/COMPRESSOR Compr. Ser. No. _________________________ Operating Log Unit Ser. No. ___________________________ Refrigerant_____________________________ Date Time Hour Meter Reading Equipment Room Temp./Outdoor Temp. Suction Pressure Suction Temperature Suction Superheat Discharge Pressure Actual Discharge Temperature Oil Pressure Oil Temperature...
  • Page 187 * Reserved for customer use for any special site determined requirements. This procedure must be performed at the speciÞ ed time interval by an Industry CertiÞ ed Technician who has been trained and qualiÞ ed to work on this type of YORK equipment.

  • Page 188: General Periodic Maintenance Checks Standard Units

    Check emergency stop. Check motor protectors. Check overload devices. Microprocessor controls: Check fault history. Check fan control function. Check program settings. Check ambient cut-out function. Check HP / LP cutout functions Check pump-down function. Check load / unload function. YORK INTERNATIONAL...

  • Page 189: Recommended Spares

    Other spare parts vary depending on the unit mod el. Review the chiller Renewal Parts Manual or Contact your local YORK Sales and Ser vice Center for in for ma tion (Please quote the unit model num ber and serial number).

  • Page 190: Troubleshooting Guide

    Check that the compressor unloads correctly. Measured temperature is incorrect. Check water temp sensor and wiring. Chiller FAULT: VAC Check main supply is stable and within allowable UNDERVOLTAGE Poor main supply voltage. limits. displayed. Check for voltage dip on compressor start. YORK INTERNATIONAL...
  • Page 191 Check operation of economizer, TXV, and liquid solenoid valve. SYS # CURR LIMITING High compressor motor current Check if liquid temperature is within operating limits. displayed has activated unloading. Check if ambient air temperature is above operating (Compressor current un- limits. loading.) YORK INTERNATIONAL...

  • Page 192: Limited Warranty York Americas Engineered Systems

    Except for reciprocating compressors, which YORK war- THIS WARRANTY IS IN LIEU OF ALL OTHER rants for a period of one year from date of ship ment, YORK WAR RAN TIES AND LIABILITIES, EXPRESS OR warrants reconditioned or re place ment ma te ri als, or start-...

  • Page 193: Temperature Conversion Chart

    186.8 22.07 16.5 239.3 100.0 190.4 22.76 246.5 102.2 23.45 17.5 253.8 104.4 197.6 24.14 106.7 201.2 24.83 18.5 268.3 108.9 204.8 25.52 275.5 111.1 208.4 26.21 19.5 282.8 113.3 26.9 115.6 215.6 27.59 20.5 297.3 117.8 219.2 YORK INTERNATIONAL...
  • Page 194 P.O. Box 1592, York, Pennsylvania USA 17405-1592 Subject to change without notice. Printed in USA Tele. 800-861-1001 Copyright © by York International Corporation 2004 ALL RIGHTS RESERVED www.york.com Form 201.19-NM7 (804) New Release...

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