Page 1 ® MILLENNIUM AIR-COOLED SCREW LIQUID CHILLERS INSTALLATION, OPERATION & MAINTENANCE New Release Form 201.18-NM4 (700) MILLENNIUM ® YCAS AIR COOLED LIQUID CHILLER YCAS 0693,0773,0783,0873,0953 (3 COMPRESSOR) YCAS 1063,1093,1163,1263 (4 COMPRESSOR) STYLE F 50 Hz 00258VIP YCAS 3 SYSTEM EPROMs YCAS 4 SYSTEM EPROMs Microprocessor Board Microprocessor Board 031-01798-002...
Page 2: Table Of Contents
Connection Types & Sizes ........32 Clock ................. 23 Cooler Connections ..........32 Print ................23 Option Flanges ............32 Program ..............23 Refrigerant Relief Valve Piping ......32 Accessories and Options ........23 Ductwork Connection ........... 32 YORK INTERNATIONAL...
Page 3 Refrigerant Flow Diagram ........114 Electrical Notes ............53 Process and Instrumentation Diagram ....115 3 & 4 Compressor Power Connection Options ..54 Component Locations – 3 Compressor Units ..116 Compressor Data ............56 Component Locations – 4 Compressor Units ..117 YORK INTERNATIONAL...
Page 4 Chilled Liquid Temps Key ..................148 System # Data Keys ....................149 Ambient Temp Key ....................149 Motor Current Key ....................149 Operating HRS / Start Counter Key ............... 150 Options Key & Dip Switch Settings ..............150 Function Key ......................152 YORK INTERNATIONAL...
Page 5 SPARE PARTS ....................... 182 Recommended Spares ..........................182 Recommended Compressor Oils ......................182 Associated Drawings ..........................182 SECTION TROUBLESHOOTING ....................183 Competent Persons Troubleshooting Guide ..................183 Sensor Calibration Charts ........................185 Limited Warranty Applied Systems ...................... 186 Temperature Conversion Chart ......................187 YORK INTERNATIONAL...
Page 6: Section 1 General Chiller Information & Safety
Center. See Commissioning, page 41. This manual and the Microprocessor Operating Instruc- • Only genuine YORK approved spare parts, oils and tions contain all the information required for correct refrigerants must be used. Recommendations on installation and commissioning of the unit, together with spare parts can be found on page 182.
Page 7: Responsibility For Safety
This manual and any other document supplied with the unit, are the property of YORK which reserves all rights. Electrical They may not be reproduced, in whole or in part, with- The unit must be grounded.
Page 8: Rotating Parts
(System 4) can also be used to stop the respective sys- toxic, non-flammable and non-corrosive, and pose no tem in an emergency. When operated, it removes the special safety hazards. Use of gloves and safety glasses electrical supply from the control system, thus shutting down the unit. YORK INTERNATIONAL...
Page 9: Material Safety Data
Fire Extinguishing Data Non-flammable. Containers Fire exposed containers should be kept cool with water sprays. Containers may burst if overheated. Fire Fighting Self contained breathing apparatus and protective clothing must be worn in fire conditions. Protective Equip. YORK INTERNATIONAL...
Page 10 General Chiller Information & Safety MATERIAL SAFETY DATA Section 1 – PRODUCT NAME AND INFORMATION Product (Trade Name and Synonyms): YORK “L” Oil Chemical Name: Ester Chemical Family: Polyol Ester Formula: Proprietary CAS#: Proprietary Section 2 – COMPONENTS AND HAZARD STATEMENT This product is non-hazardous.
Page 11 The information in this material safety data sheet should be provided to all who use, handle, store, transport, or are otherwise exposed to this product. CPI believes the information in this document to be reliable and up to date as of the date of publication, but makes no guarantee that it is. YORK INTERNATIONAL...
Page 12: Section 2 Product Description
INTRODUCTION All exposed power wiring is be routed through liquid- tight, non-metallic conduit. YORK YCAS Millennium chillers are designed for water or water-glycol cooling. All units are designed to General Description be located outside on the roof of a building or at ground The Air Cooled Screw Chiller utilizes many compo- level.
Page 13: Evaporator
Condenser The fin and tube condenser coils are manufactured from seamless, internally enhanced, high condensing coeffi- LD03674 cient, corrosion resistant copper tubes arranged in stag- FIG. 2 – SCREW COMPRESSOR YORK INTERNATIONAL...
Page 14: Economizer
15 ton TXV set for 5.5°C (10°F) superheat that flashes off 10 - 20% of the liquid from the condenser. 10 - 12 The oil (YORK “L” oil – a POE oil used for all refrig- tons are utilized for subcooling liquid refrigerant. The...
Page 15: Oil Cooling
Each power compartment contains: that could cause excessive motor current. This is ac- Compressor and fan starting contactors, fan motor ex- complished by sending 3-phase current signals propor- ternal overloads, control circuit serving compressor ca- YORK INTERNATIONAL...
Page 16: Motor Protection Module
Wye-Delta) and the number of wires in each phase value which can be decoded by the operator. A list of that are routed through the C.T. the codes follows: YORK INTERNATIONAL...
Page 17: Thermal Overload
As indicated, to place a switch in the ON position re- quires pushing the switch to the left. Imbalance is defined as (High Phase - Low Phase)/High Phase It is recommended that an YORK Ser- vice Technician or the YORK factory Improper Phase Sequence be consulted before changing these...
Page 18: Motor Protector Dip Switch Settings
Product Description TABLE 1 – MOTOR PROTECTOR DIP SWITCH SETTINGS CALCULATED DIP SWITCH SETTINGS ON MP (“1” indicated ON) TRIP SETTING YORK INTERNATIONAL...
Page 19 FORM 201.18-NM4 TABLE 1 – MOTOR PROTECTOR DIP SWITCH SETTINGS (CONT’D) CALCULATED DIP SWITCH SETTINGS ON MP (“1” indicated ON) TRIP SETTING YORK INTERNATIONAL...
Page 20 Product Description TABLE 1 – MOTOR PROTECTOR DIP SWITCH SETTINGS (CONT’D) CALCULATED DIP SWITCH SETTINGS ON MP (“1” indicated ON) TRIP SETTING YORK INTERNATIONAL...
Page 21 FORM 201.18-NM4 TABLE 1 – MOTOR PROTECTOR DIP SWITCH SETTINGS (CONT’D) CALCULATED DIP SWITCH SETTINGS ON MP (“1” indicated ON) TRIP SETTING YORK INTERNATIONAL...
Page 22: Motor Starting
1S/2S and closes the normally closed 1S (SYS The standard display language is English, with 4 other 1) or 2S (SYS 2) contacts, energizing motor contactor languages available. 2M (SYS 1) or 4M (SYS 2), completing the “DELTA” connection of the motor. YORK INTERNATIONAL...
Page 23: Entry
The supply with rent unload point, liquid temperature setpoint reset sig- appropriate branch circuit protection in accordance with nal from YORK ISN or building automation system. applicable Local codes, provides the unit control cir- cuit power supply via the panel mounted Emergency Additional functions (password protected) for program- Stop Switch.
Page 24: Dx Cooler Options
1.0 g accelerated guards mounted on the exterior of the unit (Factory or force in all directions to 2" (51 mm). Level adjustable, field mounted). deflection may vary slightly by application. (Field mounted). YORK INTERNATIONAL...
Page 25: Unit Nomenclature And Nameplate Engineering Data
14 15 BASE PRODUCT TYPE NOMINAL CAPACITY UNIT DESIGNATOR REFRIGERANT VOLTAGE/STARTER DESIGN/DEVELOPMENT LEVEL : 380/ 415 / 3 / 50 :Design Series F : YORK High Efficiency :R-22 :Engineering : Chiller 0693 Change 0773 : Air Cooled or PIN Level...
Page 26 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 EVAP. FIELD CONDENSER FIELD CABINET FIELD : Aluminum : Wire (Full Unit) Enc. Panels (factory) :Copper : 300 PSIG DWP Waterside : Wire (Full Unit) Enc. Panels (field) :BlackFin : Double Thick Insulation : Wire/Louvered Enc.
Page 27: Section 3 Handling And Storage
If the unit is to be put into storage, prior to installation, Major damage must be reported immediately to your the following precautions should be observed: local YORK representative. MOVING THE CHILLER • Unit must be “blocked” so that the base is not permitted to sag or bow.
Page 28: Unit Rigging
Handling and Storage UNIT RIGGING 2250mm (88") CORRECT! WRONG! LD05774 FIG. 3 – UNIT RIGGING WRONG! CORRECT! LD03515 FIG. 4 – LIFTING LUGS YORK INTERNATIONAL...
Page 29: Section 4 Installation
The channels should be spaced at the same centres as lence interfering with the unit airflow. the vibration mounting holes in the unit base frame and must be at least 120 mm (4-3/4") wide at the contact YORK INTERNATIONAL...
Page 30: Installation Of Vibration Isolators
1" N.P.T. connection can be obtained from YORK as an accessory for the unit. Alternatively On adjustable mounts, transfer the unit weight evenly a differential pressure switch sited across an orifice plate to the springs by turning the mount adjusting nuts (lo- may be used, preferably of the high/low limit type.
Page 31: Water Treatment
Aerated, brackish or salt water is not recommended for installed to allow flushing of the pipework system. The use in the water system(s). YORK recommends that a by-pass can be used during maintenance to isolate the water treatment specialist is consulted to determine that heat exchanger without disrupting flow to other units.
Page 32: Connection Types & Sizes
Units are supplied with outlet guards for safety and to danger or cause injury. For indoor installations pres- prevent damage to the fan blades. If these guards are sure relief valves should be piped to the exterior of the removed to fit ductwork, adequate alternative precau- building. YORK INTERNATIONAL...
Page 33: Electrical Connection
In tion (not supplied by YORK). cold weather, this could cause serious damage to the chiller due to evapora- tor freeze-up. Do not remove power...
Page 34: Remote Emergency Stop Device
Terminals 29 and 30 (Figs. 11 and 12, pages 39 and 40) remote offset of EMS% CURRENT LOAD LIMIT. See close to indicate that a system is running. Figs. 11 and 12, pages 39 and 40 for contact location. YORK INTERNATIONAL...
Page 35: Power And Control Panel Layouts (Wye-Delta Typical)
FORM 201.18-NM4 POWER AND CONTROL PANEL LAYOUTS (WYE-DELTA TYPICAL) 00263VIP FIG. 8 – POWER PANEL SECTION YORK INTERNATIONAL...
Page 36: Options Panel Layout (Typical)
Installation OPTIONS PANEL LAYOUT (TYPICAL) 00246VIP FIG. 8 – POWER PANEL SECTION (CONT’D) YORK INTERNATIONAL...
Page 37: Logic Section Layout
Back of Keypad Back of Display I/O Expansion Board #1 Power Supply Board Relay Output Board #1 Relay Output Board #2 Flow Switch & Customer Connection Terminals I/O Expansion Board #2 Circuit Breakers FIG. 9 – LOGIC SECTION LAYOUT YORK INTERNATIONAL...
Page 38: Logic Section Layout With Control Panel Layout
Installation LOGIC SECTION LAYOUT WITH CONTROL PANEL LAYOUT 00248VIP FIG. 10 – LOGIC SECTION LAYOUT WITH CONTROL PANEL LAYOUT YORK INTERNATIONAL...
Page 39: 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. 11 – CUSTOMER CONNECTIONS YORK INTERNATIONAL...
Page 40 Installation CUSTOMER CONNECTIONS RELAY BOARDS I/O EXPANSION BOARD TRANSFORMERS POWER SUPPLY BOARD CIRCUIT BREAKERS 28965A CUSTOMER MICROPROCESSOR CONNECTIONS CIRCUIT BOARD 115VAC SUPPLY (Flow Switch, Alarm, Run, etc.) FIG.12 – CUSTOMER CONNECTIONS YORK INTERNATIONAL...
Page 41: Section 5 Commissioning
Compressor Oil tions panel. It is important to check that the correct pri- To add oil to a circuit – connect a YORK hand oil pump mary tapping has been used: (Part No. 470-10654-000) to the 1/4" oil charging valve...
Page 42 There should be a straight run of at least 5 pipe diam- (See Section 6.) eters on either side of the flow switch. The flow switch should be connected to terminals 13 and 14 in the micropanel (Figs. 11 and 12, pages 39 and 40). YORK INTERNATIONAL...
Page 43: First Time Start-Up
‘ON’ po- erant is in the system, the bubbles will disappear and sition and restart the unit. be replaced by a solid column of liquid. YORK INTERNATIONAL...
Page 44: Section 6 Operation
The units are designed to work independently, or in con- automatic. After an initial period at minimum capacity junction with other equipment via a YORK ISN build- on the lead compressor, the control system will adjust ing management system or other automated control sys- the unit load depending on the chilled liquid tempera- tem.
Page 45: Section 7 Technical Data
1.10 1.05 ˚C A = Correction Factor B = Mean Temperature through Cooler C = Concentration W/W PROPYLENE GLYCOL Excessive flow, above the max GPM, will damage the evaporator. ˚C LD03504 FIG. 14 – GLYCOL CORRECTION FACTORS YORK INTERNATIONAL...
Page 46: Temperature And Flows
1. For leaving brine temperature below 4.40°C (40°F), contact your nearest YORK office for application requirements. 2. For leaving water temperature higher than 12.8°C (55°F) contact the nearest YORK office for application guidelines. 3. The evaporator is protected against freezing to -28.8°C (-20°F) with an electric heater as standard.
Page 47: Physical Data (Si Units)
Water Side Pressure, Bar Maximum Refrigerant Side Pressure, Bar 20.7 20.7 20.7 20.7 20.7 20.7 20.7 20.7 20.7 Minimum Chilled Water Flow Rate, l/sec. Maximum Chilled Water Flow Rate, l/sec. Water Connections, inches 1 Optional 21 Bar Waterside available YORK INTERNATIONAL...
Page 48: Operating Limitations & Sound Power Data
HIGH PRESS. FANS OPTION 2 SLOW SPEED FANS ELECTRICAL THREE PHASE 50 Hz (V) 380/415 * Maximum Ambient w/ High Ambient Kit is 54°C. SOUND POWER DATA (PRELIMINARY) MODEL YCAS 0693EC 0773EC 0783EC 0873EC 0953EC 1063EC 1093EC 1163EC 1263EC YORK INTERNATIONAL...
Page 49 FORM 201.18-NM4 This page intentionally left blank. YORK INTERNATIONAL...
Page 50: Electrical Data
0783 (2)2/0-500 (2)250-500 0873 (3)1/0-300 (3)2/0-400 0953 (3)1/0-300 (3)2/0-400 1063 1000 (3)2/0-500 (4)4/0-500 1093 1000 1000 1000 (3)2/0-500 (4)4/0-500 1163 1000 1000 1000 (3)2/0-500 (4)4/0-500 1263 1000 1000 1000 (3)2/0-500 (4)4/0-500 See page 53 for Electrical Data footnotes. YORK INTERNATIONAL...
Page 51 RLA Y-∆ ∆ ∆ ∆ ∆ LRA X-LRA FLA (ea) LRA (ea) 17.1 — — — 17.1 17.1 — — — 17.1 17.1 — — — 17.1 17.1 — — — 17.1 17.1 — — — 17.1 17.1 17.1 17.1 17.1 17.1 17.1 17.1 17.1 YORK INTERNATIONAL...
Page 52: Control Power Supply
(CE 50Hz) 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 3 or 4 400V - 50 HZ 9.4A — YORK INTERNATIONAL...
Page 53: Electrical Notes
MINIMUM CIRCUIT AMPACITY MINIMUM MIN NF MINIMUM NON-FUSED RUNNING LOAD AMPS S.P. WIRE SINGLE-POINT WIRING UNIT MTD SERV SW UNIT-MOUNTED SERVICE (NON-FUSED DISCONNECT SWITCH) WYE-DELTA WYE-DELTA START XLRA ACROSS-THE-LINE INRUSH LOCKED ROTOR AMPS YLRA WYE-DELTA INRUSH LOCKED ROTOR AMPS YORK INTERNATIONAL...
Page 54: 3 & 4 Compressor Power Connection Options
Y - ∆ Start and Across the Line Start CE Mark Field Supply #2 Field Supply #1 LD05559 See page 55 for notes. NOTE 2 FIG. 16 – MULTIPLE POINT POWER SUPPLY CONNECTION WITH INDIVIDUAL SYSTEM CIRCUIT BREAKERS YORK INTERNATIONAL...
Page 55 1. – – – – – – – Dashed Line indicates Field Provided Wiring. 2. The above recommendations are based on the National Electrical Code and using copper conductors only. Field wiring must also comply with local codes. YORK INTERNATIONAL...
Page 56: Compressor Data
(C5N, C5E, C6N, C6E) VOLTAGE CODE -50 -58 MAX KW 80 105 MAX AMPS 135 118 TABLE 3 – FAN DATA (-46) NOMINAL POWER FULL LOAD AMPS LOCKED ROTOR AMPS FAN TYPE (kW) (FLA) (LRA) STANDARD 1.57 18.0 HIGH PRESSURE 46.3 YORK INTERNATIONAL...
Page 57: Elementary Diagram - Across-The-Line Start
FORM 201.18-NM4 ELEMENTARY DIAGRAM LD04172A FIG. 18 – ELEMENTARY DIAGRAM – ACROSS-THE-LINE START YORK INTERNATIONAL...
Page 58 Technical Data ELEMENTARY DIAGRAM LD04172B FIG. 19 – ELEMENTARY DIAGRAM – ACROSS-THE-LINE START YORK INTERNATIONAL...
Page 59: Delta Start (Ycas0693 - Ycas0953)
(Class 2) Connections. See Note 2 shown, install a cycling device in series with the flow switch (FSLW). See Note 3 for contact rating and Terminal Block for YORK Connections Only wiring specifications. Also refer to cautions on page Wiring and Components by YORK 63A.
Page 60: Standard 3 Compressor Power Supplies Wye-Delta Start
STANDARD 3 COMPRESSOR POWER SUPPLIES WYE-DELTA START (PRESENT ON CERTAIN MODEL CHILLERS) (NOT PRESENT ON 3-COMPRESSOR CHILLERS) (PRESENT ON CERTAIN MODEL CHILLERS) (NOT PRESENT ON 3-COMPRESSOR CHILLERS) LD04174 FIG. 21 – STANDARD 3 COMPRESSOR POWER SUPPLIES - WYE-DELTA START YORK INTERNATIONAL...
Page 61: Wiring Diagram Across-The-Line Start
FORM 201.18-NM4 WIRING DIAGRAM ACROSS-THE-LINE START (PRESENT ON CERTAIN MODEL CHILLERS) (NOT PRESENT ON 3-COMPRESSOR CHILLERS) (PRESENT ON CERTAIN MODEL CHILLERS) (NOT PRESENT ON 3-COMPRESSOR CHILLERS) LD04173 FIG. 22 – ELEMENTARY DIAGRAM – ACROSS-THE-LINE START YORK INTERNATIONAL...
Page 62: Standard Compressor Power Supplies
Technical Data STANDARD COMPRESSOR POWER SUPPLIES ACROSS-THE-LINE START & WYE-DELTA START LD04175 FIG. 23 – ELEMENTARY DIAGRAM YORK INTERNATIONAL...
Page 63 Any contacts connected to flow switch inputs or BAS inputs on terminals 13 - 19 or TB3, or any other terminals, must be suppressed with a YORK P/N 031-00808-000 suppressor across the relay/ contactor coil. CAUTION: Control wiring connected to the control panel should never be run in the same conduit with power wiring.
Page 64 Technical Data FORM 201.18-NM4 CONNECTION DIAGRAM FIG. 24 – CONNECTION DIAGRAM LD04178 YORK INTERNATIONAL YORK INTERNATIONAL...
Page 65 FORM 201.18-NM4 LD04179 YORK INTERNATIONAL...
Page 66: Connection Diagram
Technical Data CONNECTION DIAGRAM Box Information continued on page 67 LD04180 FIG. 25 – CONNECTION DIAGRAM YORK INTERNATIONAL...
Page 67 CONNECTION DIAGRAM FIG. 44 & 45 LEGEND (PAGES 90 & 91) Box Information continued from page 66 CONNECTION DIAGRAM ELECTRIC BOX DXST DIRECT DRIVE LD04181 FIG. 26 – CONNECTION DIAGRAM FIG. 27 – CONNECTION DIAGRAM (CONT’D) LD03281 YORK INTERNATIONAL YORK INTERNATIONAL...
Page 68: Connection Diagram - Electrical Box
CONNECTION DIAGRAM - ELECTRICAL BOX YCAS, YCAS0693 - 0953 (STYLE F) YCAS, YCAS0693 - 0953 (STYLE F) STANDARD & REMOTE EVAP. UNITS STANDARD & REMOTE EVAP. UNITS FIG. 28 – CONNECTION DIAGRAM FIG. 29 – CONNECTION DIAGRAM YORK INTERNATIONAL YORK INTERNATIONAL...
Page 69: Elementary Diagram Dxst Direct Drive Control Circuit
FORM 201.18-NM4 ELEMENTARY DIAGRAM DXST DIRECT DRIVE CONTROL CIRCUIT LD04177 FIG. 30 – ELEMENTARY DIAGRAM, DXST DIRECT DRIVE - CONTROL CIRCUIT YORK INTERNATIONAL...
Page 70 Technical Data ELEMENTARY DIAGRAM DXST DIRECT DRIVE CONTROL CIRCUIT LD04373 FIG. 31– ELEMENTARY DIAGRAM, DXST DIRECT DRIVE - CONTROL CIRCUIT YORK INTERNATIONAL...
Page 71 FORM 201.18-NM4 ELEMENTARY DIAGRAM DXST DIRECT DRIVE CONTROL CIRCUIT DETAIL "C" SEE INSTALLATION, OPERATION AND MAINTENANCE MANUAL FOR JUMPER OF CONDENSER FANS FOR CHILLER MODEL LD04374 FIG. 32 – ELEMENTARY DIAGRAM, DXST DIRECT DRIVE - CONTROL CIRCUIT YORK INTERNATIONAL...
Page 72: Connection Diagram System Wiring
Technical Data CONNECTION DIAGRAM SYSTEM WIRING STANDARD & REMOTE EVAP. UNITS LD04184 FIG. 33 – CONNECTION DIAGRAM SYSTEM WIRING YORK INTERNATIONAL...
Page 73 FORM 201.18-NM4 CONNECTION DIAGRAM SYSTEM WIRING STANDARD & REMOTE EVAP. UNITS LD04185 FIG. 34 – CONNECTION DIAGRAM SYSTEM WIRING YORK INTERNATIONAL...
Page 74: Elementary Diagram Dxst Direct Drive Power Circuit
Technical Data ELEMENTARY DIAGRAM DXST DIRECT DRIVE POWER CIRCUIT FIG. 35 – ELEMENTARY DIAGRAM YORK INTERNATIONAL...
Page 75 FORM 201.18-NM4 ELEMENTARY DIAGRAM DXST DIRECT DRIVE POWER CIRCUIT FIG. 36 – ELEMENTARY DIAGRAM YORK INTERNATIONAL...
Page 76: Wye-Delta Start (Ycas1062 - Ycas1263)
(Class 2) Connections. See Note 2 switching 24VDC. (Gold contacts recommended.) Control Wiring must not be run in the same conduit Terminal Block for YORK Connections Only with any line voltage wiring. Wiring and Components by YORK 4. To cycle unit ON and OFF automatically with contact...
Page 77: Standard 4 Compressor Power Supplies Wye-Delta Start
FORM 201.18-NM4 STANDARD 4 COMPRESSOR POWER SUPPLIES WYE-DELTA START LD04262 FIG. 38 – STANDARD POWER SUPPLY - WYE-DELTA START YORK INTERNATIONAL...
Page 78: Standard Compressor Power Supplies Across-The-Line Start (Ycas1063 - Ycas1263)
Technical Data STANDARD COMPRESSOR POWER SUPPLIES ACROSS-THE-LINE START (YCAS1063 - YCAS1263) LD04261 FIG. 39 – STANDARD POWER SUPPLY - ACROSS-THE-LINE START YORK INTERNATIONAL...
Page 79 FORM 201.18-NM4 This page intentionally left blank. YORK INTERNATIONAL...
Page 80: Standard Compressor Power Supplies (Ycas1063 - Ycas1263)
Technical Data STANDARD COMPRESSOR POWER SUPPLIES (YCAS1063 - YCAS1263) ACROSS-THE-LINE START & WYE-DELTA START LD04257 FIG. 40 – STANDARD COMPRESSOR POWER SUPPLIES - ACROSS-THE-LINE START AND WYE-DELTA START YORK INTERNATIONAL...
Page 81 FORM 201.18-NM4 FORM 201.18-NM4 LD04258 FIG. 40 – STANDARD COMPRESSOR POWER SUPPLIES - ACROSS-THE-LINE AND WYE-DELTA START (CONT’D) YORK INTERNATIONAL YORK INTERNATIONAL...
Page 82 Technical Data FORM 201.18-NM4 This page intentionally left blank. This page intentionally left blank. YORK INTERNATIONAL YORK INTERNATIONAL...
Page 83 FORM 201.18-NM4 This page intentionally left blank. YORK INTERNATIONAL...
Page 84: Connection Diagram Systems 1 & 2
Technical Data CONNECTION DIAGRAM SYSTEMS 1 & 2 FIG. 41 – CONNECTION DIAGRAM - WYE-DELTA START LD04265 YORK INTERNATIONAL...
Page 85 Any contacts connected to flow switch inputs or BAS inputs on terminals 13 - 19 or TB3, or any other terminals, must be sup- pressed with a YORK P/N 031- 00808-000 suppressor across the relay/contactor coil. CAUTION: Control wiring connected to the...
Page 86 Technical Data FORM 201.18-NM4 CONNECTION DIAGRAM SYSTEMS 3 & 4 LD04267 FIG. 42 – CONNECTION DIAGRAM YORK INTERNATIONAL YORK INTERNATIONAL...
Page 87 FORM 201.18-NM4 LD04268 YORK INTERNATIONAL...
Page 88: Connection Diagram - Electrical Box
Technical Data CONNECTION DIAGRAM – ELECTRICAL BOX YCAS1063 - 1263 (STYLE F) STANDARD & REMOTE EVAP. UNITS FIG. 43 – CONNECTION DIAGRAM SYSTEM WIRING YORK INTERNATIONAL...
Page 89 FORM 201.18-NM4 CONNECTION DIAGRAM – ELECTRICAL BOX YCAS1063 - 1263 (STYLE F) STANDARD & REMOTE EVAP. UNITS FIG. 44 – CONNECTION DIAGRAM YORK INTERNATIONAL...
Page 90: Elementary Diagram Dxst Direct Drive Control Circuit
Technical Data ELEMENTARY DIAGRAM DXST DIRECT DRIVE CONTROL CIRCUIT LD04177 FIG. 45 – ELEMENTARY DIAGRAM, DXST DIRECT DRIVE - CONTROL CIRCUIT YORK INTERNATIONAL...
Page 91 FORM 201.18-NM4 ELEMENTARY DIAGRAM DXST DIRECT DRIVE CONTROL CIRCUIT LD04695 FIG. 46 – ELEMENTARY DIAGRAM, DXST DIRECT DRIVE - CONTROL CIRCUIT YORK INTERNATIONAL...
Page 92 Technical Data ELEMENTARY DIAGRAM DXST DIRECT DRIVE CONTROL CIRCUIT DETAIL "C" SEE INSTALLATION, OPERATION AND MAINTENANCE MANUAL FOR NUMBER OF CONDENSER FANS FOR CHILLER MODELS LD04757 FIG. 47 – ELEMENTARY DIAGRAM, DXST DIRECT DRIVE - CONTROL CIRCUIT YORK INTERNATIONAL...
Page 93: Connection Diagram System Wiring
FORM 201.18-NM4 CONNECTION DIAGRAM SYSTEM WIRING STANDARD & REMOTE EVAP. UNITS LD04269 FIG. 48 – CONNECTION DIAGRAM SYSTEM WIRING YORK INTERNATIONAL...
Page 94 Technical Data CONNECTION DIAGRAM SYSTEM WIRING STANDARD & REMOTE EVAP. UNITS LD04270 FIG. 49 – CONNECTION DIAGRAM SYSTEM WIRING YORK INTERNATIONAL...
Page 95: Compressor Terminal Box - Systems 1- 4
FORM 201.18-NM4 COMPRESSOR TERMINAL BOX SYSTEMS 1 THROUGH 4 LD04271 FIG. 50 – COMPRESSOR TERMINAL BOX, SYSTEMS 1-4 YORK INTERNATIONAL...
Page 96: Dimensions
Site restrictions may compromise minimum clearances indicated below, resulting in unpre- dictable air flow patterns and possible diminished performance. YORK’s unit controls will optimize operation without nuisance high pres- sure safety cutout; however, the system designer must consider potential performance degradation. ‘Access to the unit control center assumes the unit is no higher than on spring isolators.
Page 97 FORM 201.18-NM4 DIMENSIONS – YCAS0693 - 0773 LD03977 CENTER OF GRAVITY (Alum.) CENTER OF GRAVITY (Copper) YCAS YCAS 0693 3465 1052 0693 3561 1059 0773 3440 1056 0773 3537 1066 1021 LD03978 YORK INTERNATIONAL...
Page 98: Ycas0783 - 0953 (Si)
Site restrictions may compromise minimum clearances indicated below, resulting in unpre- dictable air flow patterns and possible diminished performance. YORK’s unit controls will optimize operation without nuisance high pres- sure safety cutout; however, the system designer must consider potential performance degradation. Access to the unit control center assumes the unit is no higher than on spring isolators.
Page 99 3610 1067 1011 2438 1981 SYS. #3 SYS. #1 & #2 10" POWER OPENING 10" (4) 57 DIA. RIGGING WATER INLET (BOTH SIDES) WATER OUTLET HOLES (EACH SIDE) 3708 2642 1614 1727 2277 1713 8694 SIDE VIEW LD03970 YORK INTERNATIONAL...
Page 100: Ycas1063 (Si)
Site restrictions may compromise minimum clearances indicated below, resulting in unpre- dictable air flow patterns and possible diminished performance. YORK’s unit controls will optimize operation without nuisance high pres- sure safety cutout; however, the system designer must consider potential performance degradation. Access to the unit control center assumes the unit is no higher than on spring isolators.
Page 101 FORM 201.18-NM4 DIMENSIONS – YCAS1063 LD04017 CENTER OF GRAVITY (Alum.) CENTER OF GRAVITY (Copper) YCAS YCAS 1063 5228 1117 1063 5284 1117 1002 LD04018 YORK INTERNATIONAL...
Page 102: Ycas1093 (Si)
Site restrictions may compromise minimum clearances indicated below, resulting in unpre- dictable air flow patterns and possible diminished performance. YORK’s unit controls will optimize operation without nuisance high pres- sure safety cutout; however, the system designer must consider potential performance degradation. Access to the unit control center assumes the unit is no higher than on spring isolators.
Page 103 FORM 201.18-NM4 DIMENSIONS – YCAS1093 LD03993 CENTER OF GRAVITY (Alum.) CENTER OF GRAVITY (Copper) YCAS YCAS 1093 4667 1117 1093 4718 1117 LD03994 YORK INTERNATIONAL...
Page 104: Ycas1163 - 1263 (Si)
Site restrictions may compromise minimum clearances indicated below, resulting in unpre- dictable air flow patterns and possible diminished performance. YORK’s unit controls will optimize operation without nuisance high pres- sure safety cutout; however, the system designer must consider potential performance degradation. Access to the unit control center assumes the unit is no higher than on spring isolators.
Page 105 5086 1117 1001 1263 4907 1117 1263 5002 1117 2438 1981 (4) 57 DIA. RIGGING 10" POWER OPENING 10" WATER INLET HOLES (EACH SIDE) (BOTH SIDES) WATER OUTLET 2642 6673 1727 2277 1713 2833 11132 LD04002 SIDE VIEW YORK INTERNATIONAL...
Page 106: Clearances
Technical Data CLEARANCES 1.3 m (48") (72") LD05777 Notes: No obstructions allowed above the unit. Only one adjacent wall may be higher than the unit. Adjacent units should be 3 meters (10 feet) apart. FIG. 51 – CLEARANCES YORK INTERNATIONAL...
Page 107: Operating Weights - Aluminum Fin Coils
CP-2-32 2600 1179.3 0.74 18.7 White AWMR-1-553 2200 997.9 CP-2-35 3000 1360.8 0.70 17.7 Gold AWMR-2-510 386.5 AWMR-2-520 1300 589.7 AWMR-2-521 1552 704.0 AWMR-2-552 1900 861.8 AWMR-2-53 2000 907.2 AWMR-2-530 2300 1043.3 AWMR-2-531 2552 1157.6 AWMR-2-532 3000 1360.8 YORK INTERNATIONAL...
Page 108: Isolator Selection - Aluminum Fin Coils
-1-531 -2-520 -2-531 -1-553 -2-521 -1-551 -1-553 -1-553 -1-531 -2-520 -2-531 -1-553 -2-521 1263 -1-551 -1-553 -1-553 -1-531 -2-520 -2-531 -1-553 -2-521 -1-551 -1-553 -1-553 -1-531 -2-520 -2-531 -1-553 -2-521 (Isolator layout diagrams are located on pages 97-105) YORK INTERNATIONAL...
Page 109: Operating Weights - Copper Fin Coils
CP-2-32 2600 1179.3 0.74 18.7 White AWMR-1-553 2200 997.9 CP-2-35 3000 1360.8 0.70 17.7 Gold AWMR-2-510 386.5 AWMR-2-52 1000 453.6 AWMR-2-520 1300 589.7 AWMR-2-521 1552 704.0 AWMR-2-53 2000 907.2 AWMR-2-530 2300 1043.3 AWMR-2-531 2552 1157.6 AWMR-2-532 3000 1360.8 YORK INTERNATIONAL...
Page 110: Isolator Selection - Aluminum Fin Coils
-1-532 -2-520 -2-532 -1-553 -2-53 -1-552 -2-531 -2-531 -1-532 -2-520 -2-532 -1-553 -2-53 1263 -1-552 -2-531 -2-531 -1-532 -2-520 -2-532 -1-553 -2-53 -1-552 -2-531 -2-531 -1-532 -2-520 -2-532 -1-553 -2-53 (Isolator layout diagrams are located on pages 97-105) YORK INTERNATIONAL...
Page 111: Isolator Details
5.5" 3.375" 2.875" 2.5" 0.5" 4.125" 0.563" 0.25" R-3 or RD-3 (139.7) (85.8) (73.2) (63.5) (12.7) (104.8) (14.4) (6.3) 6.25" 4.625" 2.75" 3.0" 0.5" 5.0" 0.563" 0.375" R-4 or RD-4 (158.7) (117.6) (69.8) (76.2) (12.7) (127.0) (14.4) (9.6) YORK INTERNATIONAL...
Page 112 Technical Data ISOLATOR DETAILS LD01089 CP-2-XX 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 50-553 11NC AWMR-2 7-1/2 3-3/4 9-1/2 14-1/2 7-1/4 50-553 10NC YORK INTERNATIONAL...
Page 113: Installation Instructions For Vmc Series Awr/Awmr And Cp Restrained Mountings
2mm (1/8") between resilient washer and (1/4") shim between the upper load plate and ver- underside of channel cap plate. tical uprights. Lower the equipment on the block- 10. Installation is now complete. ing or shimmed isolators. YORK INTERNATIONAL...
Page 114: Refrigerant Flow Diagram
The high pressure oil-free vapor is fed to the air ing takes place before returning to the cooler. cooled condenser coil and fans where the heat is removed. The fully condensed liquid enters the economizer. FIG. 52 – REFRIGERANT FLOW DIAGRAM YORK INTERNATIONAL...
Page 115: Process And Instrumentation Diagram
FORM 201.18-NM4 PROCESS AND INSTRUMENTATION DIAGRAM (Added to some models) LD03486 FIG. 53 – PROCESS AND INSTRUMENTATION DIAGRAM YORK INTERNATIONAL...
Page 116: Component Locations - 3 Compressor Units
HIGH PRESSURE CUT-OUT - STS SUCTION TEMPERATURE SENSOR - RFTS REFRIGERANT FEED TEMPERATURE SENSOR (R407C only) - XCMTB COMPRESSOR MOTOR TERMINAL BOX - YELSSV ECONOMIZER LIQUID SUPPLY SOLENOID VALVE - ZCPR COMPRESSOR LD05021 FIG. 54 – COMPONENT LOCATIONS YORK INTERNATIONAL...
Page 117: Component Locations - 4 Compressor Units
FORM 201.18-NM4 COMPONENT LOCATIONS – 4 COMPRESSOR UNITS LD05024 FIG. 55 – COMPONENT LOCATIONS (CONT’D) YORK INTERNATIONAL...
Page 118: Compressor Components
STATOR LOCKING OIL FILTER BOLT COVER PLATE OIL FILTER BLEED & EVACUATION POINT LIFTING LUG THREADED HOLE HEATER ECONOMIZER GAS IN DISCHARGE CASE DISCHARGE GAS OUT OIL INLET FROM CONDENSER LD03668 CODING COIL FIG. 56 – COMPRESSOR COMPONENTS YORK INTERNATIONAL...
Page 119 FORM 201.18-NM4 COMPRESSOR COMPONENTS - CONT’D LD03669 FIG. 57 – COMPRESSOR COMPONENTS YORK INTERNATIONAL...
Page 120 Technical Data COMPRESSOR COMPONENTS - CONT’D LD03670 FIG. 58 – COMPRESSOR COMPONENTS YORK INTERNATIONAL...
Page 121 FORM 201.18-NM4 COMPRESSOR COMPONENTS - CONT’D LD03671 FIG. 59 – COMPRESSOR COMPONENTS YORK INTERNATIONAL...
Page 122 Technical Data COMPRESSOR COMPONENTS - CONT’D MOTOR ROTOR / MALE ROTOR LOCKING O-RING MALE ROTOR SLIDE VALVE RELIEF O-RING RETURN VALVE SPRING SUPPORT ECONOMIZER FEMALE ROTOR SLIDE VALVE RINGS PLUG LD03672 FIG. 60 – COMPRESSOR COMPONENTS YORK INTERNATIONAL...
Page 123 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. 61 – COMPRESSOR COMPONENTS YORK INTERNATIONAL...
Page 124: System Startup Checklist
COMPANY: _______________________________ START-UP DATE : _________________________ If it is necessary to add oil, connect a YORK oil pump to the charging valve on the oil separator, CHILLER MODEL #: _______________________ but do not tighten the flare nut on the delivery tubing.
Page 125: Panel Checks
7. Assure that the CLK jumper J18 on the Micro- switches are improperly programmed. processor Board is in the ON position (Top 2 pins). 8. Set the Time and Date. 9. Program the Daily Schedule start and stop times. YORK INTERNATIONAL...
Page 126: Initial Start-Up
8°C (15°F) before the compressor suction service valve, and the less than the condensing temperature (The tempera- suction pressure is taken at the compressor suction ser- ture corresponding to the condensing pressure from vice valve. the refrigerant temperature/pressure chart). YORK INTERNATIONAL...
Page 127: Checking Economizer Superheat
Motor Gas Temp = 32°C (90°F) load and unload to control water temperature, the chiller minus Economizer Press is ready to be placed into operation. 9.6 bar (139 PSIG) converted to Temp - 26°C (78°F) 6°C (12°F) YORK INTERNATIONAL...
Page 128: Section 8 Micropanel Contents
This key is used for display and programming of the chiller operational settings and limits. This switch shuts down the entire chiller when placed in the OFF position. The switch must be ON for the chiller to operate. YORK INTERNATIONAL...
Page 129: Introduction & Physical Description
Board(s). Displays will be updated every two seconds by the mi- External interface is available for control of the chiller croprocessor. via a YORK ISN System or YORK Remote Control Center. In addition, EMS/BAS System connections are YORK INTERNATIONAL...
Page 130: 1.3 Unit (Chiller) On / Off Switch
The battery backup assures that Expansion Board which multiplexes them and then any programmed values (setpoints, clock, cutouts, etc.) feeds them to the Microprocessor Board. are not lost during a power failure or shutdown period regardless of the time involved. YORK INTERNATIONAL...
Page 131: 1.6 Circuit Breakers
Microprocessor Board tor contactors/starters, solenoid valves, and heaters via the I/O Expansion Board allowing the microproces- which control system operation. sor to monitor motor currents for low current, high cur- rent, unbalanced current, and single-phasing. YORK INTERNATIONAL...
Page 132: Transformers
This allows the micro to monitor current and shut a system down if low or high motor current is sensed. This is a non-adjustable pro- tection circuit electronically sized to a system's motor specifications. YORK INTERNATIONAL...
Page 133 FORM 201.18-NM4 29119A SIDE VIEW 29121A 29121A TOP VIEW TOP VIEW DISPLAY SWITCH PUSHED TO LEFT INDICATES 29120A SIDE VIEW FIG. 62 – MOTOR PROTECTOR YORK INTERNATIONAL...
Page 134: Ems/Bas Controls
Motor Current Key (see Section vice must be suppressed with a sup- 3.5). However, if this display is being pressor YORK Part Number 031- viewed when the reset pulse occurs, the 00808-000 (60Hz models) or a stan- setpoint will not change on the display.
Page 135 To maintain a given offset, the contact closure signal must be repeated every 30 seconds - 30 minutes. The pressed with a suppressor YORK Part refresh is not accepted sooner than 30 seconds from Number 031-00808-000 (60 Hz mod-...
Page 136: Microprocessor Board Layout
NOTE : Dimple is positioned at top edge Dip Switch Set (8 switches) System Switches S2 = System 1 S3 = System 2 S2 to S5 S4 = System 3 S5 = System 4 FIG. 63 – COMPONENT LAYOUT YORK INTERNATIONAL...
Page 137: Logic Section Layout
Microprocessor Board Back of Keypad I/O Expansion Board # 2 I/O Expansion Board # 1 Power Supply Board Relay Output Board #1 Relay Output Board #2 Flow Switch & Customer Connection Terminals (TB4) FIG. 64 – LOGIC SECTION LAYOUT YORK INTERNATIONAL...
Page 138: Anti-Recycle Timer
66°C (150 °F) and will turn on when the discharge tem- tem or if power is lost to the control panel. The internal perature is equal to or less than 66°C (150 °F). contacts are normally open (N.O.) and will close when YORK INTERNATIONAL...
Page 139: Run Status (Chiller)
MANUAL Lead/Lag selection will be automatically cal equipment) and the alarm circuit overridden by the micro to allow the lag compressor to should fail to function, YORK will not automatically become the lead anytime the selected lead be liable for damages.
Page 140: Status Key: General Status Messages And Fault Warnings
R U N N I N G amples of each display. In each example “#” is used as This message indicates that the respective compressor applicable to represent the system number where mes- is running due to demand. sages apply to individual systems. YORK INTERNATIONAL...
Page 141: Unit Warnings
S Y S P U M P I N G D O W N Permissive message will be displayed and the indicated S Y S P U M P I N G D O W N system will not run. YORK INTERNATIONAL...
Page 142: Anticipation Control Status Messages
For the first 3 minutes that the saturated suction tem- safety thresholds. This avoids total loss of cooling perature is at or below -2°C (29°F) any further compres- resulting from a lockout by a safety control. YORK INTERNATIONAL...
Page 143: Unit Fault Status Messages
Closure of the flow switch(es) is monitored to check fault will clear when ambient temperature rises 1°C that flow is present in the evaporator when a compres- (2°F) above the cut-out. sor is running. Any external cycling devices fitted by YORK INTERNATIONAL...
Page 144: System Fault (Safety) Status Messages
This safety is activated after 3 minutes of operation. while manually allowing repetitive re- Oil pressure must be less than 4.4 bar (65 PSID) for starts may cause further expensive R22 models as long as the compressor continues to damage to the system. run. YORK INTERNATIONAL...
Page 145 After 225 seconds of operation with suction pressure perature is above 107°C (225°F) for more than 3 sec- operating above the cut-out, a 30 second transient timer onds, the compressor will shut down. prevents short term fluctuations in suction pressure due YORK INTERNATIONAL...
Page 146 Average motor current is monitored after 7 seconds of down the compressor. Auto restart will not occur since compressor operation. The system will be shut down if manual reset is required. A fault lockout will automati- average motor current exceeds 115% FLA. YORK INTERNATIONAL...
Page 147: Printout On Fault Shutdown
23 bar (330 PSIG) and the cutout con- matic printout. This is not a cause for tacts close. A fault lockout will result if safety thresh- concern. olds are exceeded three times in a 90 minute period. YORK INTERNATIONAL...
Page 148: Display Keys & Option Switches
M C H L T 6 . 6 ° indicate the actual values are greater than or less than the values which are being displayed, but are outside the ability of the micro to give an actual reading. This YORK INTERNATIONAL...
Page 149: System # Data Keys
MOTOR CURRENT KEY solenoid in the form of a current signal. To the micro- processor, STEP 0 = fully unloaded and STEP 75 = Pressing the Motor Current key displays compressor fully loaded. current for each system: YORK INTERNATIONAL...
Page 150: Operating Hrs / Start Counter Key
1 to 5 bar (20 to 70 PSIG) for R-22 models and 0.3 to 5 bar (5 to 70 PSIG) for R-407c The Options key provides a display of options which models. are programmed by the positions of the S1 Dip Switches YORK INTERNATIONAL...
Page 151 The R-22 Mode MUST be selected for models using LD03511A refrigerant type R-22. Incorrect selection of this switch FIG. 66 – ENLARGED PHOTOGRAPH OF DIP may cause serious damage to the chiller. SWITCHES ON MICROPROCESSOR BOARD YORK INTERNATIONAL...
Page 152: Function Key
Control Control sage. Refrigerant R-407C Refrigerant R-22 Spare Spare The following keys can be scrolled using the Function Spare Spare Key: Chilled Liquid Temps, System # Data, Motor Cur- Spare Spare rent and Options. Spare Spare Spare Spare YORK INTERNATIONAL...
Page 153: Print Keys
Timer and the Unload Timer. These Timers constantly printer. As the data is transmitted it is erased from the recycle and are used in conjunction with “rate control” memory. and “temperature deviation from setpoint” to determine when loading should occur. YORK INTERNATIONAL...
Page 154: Operating Data - Remote Printout
The follow text shows a typical example printout ob- CUR/TEMP – EMS PWM Current Limiting & tained by pressing the Operating Data key with an op- Temperature Reset Enabled tional printer attached. In this case an example is shown YORK INTERNATIONAL...
Page 155 YCAS 4 System models provide similar printouts SYSTEM 2 DATA for the appropriate number of systems: COMPRESSORS STATUS RUN TIME 0- 0-15-26 D-H-M-S MOTOR CURRENT 104 AMPS 87 %FLA YORK INTERNATIONAL CORPORATION SUCTION PRESSURE 57 PSIG MILLENNIUM SCREW CHILLER DISCHARGE PRESSURE 233 PSIG OIL PRESSURE...
Page 156: History Key
This message displays the suction pressure cut-out pro- grammed at the time of the fault. 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 157 1 - 3 - 4 8 - 1 7 D - H - M - S play will not appear. This message shows the Run Time logged on the sys- tem since the last compressor start, in Days (D), Hours (H), Minutes (M), and Seconds (S). YORK INTERNATIONAL...
Page 158 System 3 data before looping back to the start of the Safety Shutdown display. This message, which is only displayed if the unit is in R-407c mode, indicates the refrigerant temperature at the inlet of the cooler. YORK INTERNATIONAL...
Page 159: Fault History Data - Remote Printout
4 compressor models will be similar. COMPRESSOR HEATER WYE-DELTA RELAY An example of the HISTORY Printout is shown below: SYSTEM 2 DATA YORK INTERNATIONAL CORPORATION COMPRESSORS STATUS RUN TIME 0- 0-15-26 D-H-M-S MILLENNIUM SCREW CHILLER MOTOR CURRENT 104 AMPS 87 %FLA...
Page 160: Entry Keys
“AM” or “PM” on the display. For ex- ample, pressing the # key when the cursor is on “PM” the original values will be returned. changes it to “AM.” YORK INTERNATIONAL...
Page 161: Setpoints Keys & Chilled Liquid Control
(+ or - Range) This deviation temperature error and the rate of change to determine is simply called the “Control Range” and is best de- the amount of loading necessary to cool the chilled liq- YORK INTERNATIONAL...
Page 162 Load Timers are always set at 10 seconds first. between changes. Unload timers are set at 5 seconds between changes. YORK INTERNATIONAL...
Page 163 SYS 1 “2” steps while loading SYS 2 “8” Steps. uid temperature drops more than CR/ Under these circumstances, the two systems will not 2 below the low limit of the Control appear to equalize loading. Range. YORK INTERNATIONAL...
Page 164: Local Cooling Setpoints Key
10°C (or 10°F ). Press the ENTER Key to memory. store the new value in memory. After pressing the Enter key, the display will continue to show the message until another key is pressed. YORK INTERNATIONAL...
Page 165: Clock Keys
Press ENTER to move on to the hour part of the display. Next, key in the time (hours/minutes) using a leading “0” ing the Set Time key a second time enters “display” mode in which the cursor will disappear and the “live” clock will be displayed. YORK INTERNATIONAL...
Page 166: Set Schedule / Holiday Key
ON position, all 00.00s should be programmed into quirements are occur only occasion- the daily schedule. This can be done manually for indi- vidual days or for all days by pressing Cancel and En- ally. ter for the Monday Start/Stop schedule. YORK INTERNATIONAL...
Page 167: Manual Override Key
See also only active for a period of 30 minutes and the follow- Section 2.5. ing status message will be observed. M A N U A L O V E R R I D E YORK INTERNATIONAL...
Page 168: Program Key
Enter key the first 5 seconds of operation after which if the cut- is pressed and the display will scroll on to the next pro- out point is exceeded for 3 seconds, the system will grammable value. shut down. YORK INTERNATIONAL...
Page 169 0.3 bar (5 - 70 PSIG) for tion at low refrigerant suction pressure. R22 and R-407c models. In this mode, the cutout should YORK INTERNATIONAL...
Page 170 The Motor Current Unload point is used to avoid a high become operational. Values below -4°C (25°F) can be motor current safety shutdown by unloading a compres- used for applications requiring chiller operation at YORK INTERNATIONAL...
Page 171 !# keys are used to change from Automatic to The !# is needed in some applications and not in others. Al- Manual lead/lag. The ENTER key must be pressed to though the minimum setting allowed on this timer will save the selection in memory. YORK INTERNATIONAL...
Page 172: Programming "Default" Values
Leaving Chilled Liquid Temp Cutout 2°C (36°F) the PROGRAM key followed by the ENTER key, to Suction Pressure Cutout 3 bar (44 PSIG) program the “refrigerant type.” Press the Program key again, key in the numbers “6140”, then press Enter. As YORK INTERNATIONAL...
Page 173: Compressor Condenser Fan Control
SYS 2 by Relay Output Board # 2. SYS 3 is controlled is activated when the DP rises over 2.0 bar (290 PSIG). by I/O Expansion Board #2. % (Not present on 60 Hz Models.) LD05022 FIG. 67– CONDENSER FAN CONTROL LAYOUT FOR DXST COMPRESSORS UNITS YORK INTERNATIONAL...
Page 174 15M, 16M, 17M, 18M, 19M 230, 231, 232 10, 14, 15 SYSTEM 3 IS ALWAYS EQUIPPED WITH 4 FANS. * Newer versions of EPROMs will have ON and OFF pressures (1.0 bar) 15 PSIG below the published values shown above. YORK INTERNATIONAL...
Page 175: Compressor Condenser Fan Control
SYS 2 by Relay Output Board # 2. SYS 3 and 4 are is activated when the DP rises over 2.0 bar (290 PSIG). controlled by I/O Expansion Board #2. LD05023 FIG. 68 – CONDENSER FAN CONTROL LAYOUT FOR DXST COMPRESSORS UNITS YORK INTERNATIONAL...
Page 176 SYSTEM 3 IS ALWAYS EQUIPPED WITH 3 OR 4 FANS. SYSTEM 4 IS ALWAYS EQUIPPED WITH 3 OR 4 FANS. * Newer versions of EPROMs will have ON and OFF pressures 15 PSIG below the published values shown above. YORK INTERNATIONAL...
Page 177 9, 10 14, 16, 18 >20.0 BAR <15.2 BAR & <29.4°C 27M, 28M, 29M 430, 431, 432 8, 9, 10 * Newer versions of EPROMs will have ON and OFF pressures 15 PSIG below the published values shown above. YORK INTERNATIONAL...
Page 178: Section 9 Maintenance
LOAD’ for approximately half an hour. The oil level YORK shall not be liable for costs incurred to return should be about half way up the upper of the two sight the unit to satisfactory condition.
Page 179: Compressor Unit Operation
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 180: Maintenance Requirements
* Reserved for customer use for any special site determined requirements. This procedure must be performed at the specified time interval by an Industry Certified Technician who has been trained and qualified to work on this type of YORK equipment. A record of this procedure being successfully carried out must be maintained on file by the equipment owner should proof of adequate maintenance be...
Page 181: General Periodic Maintenance Checks Standard Units
Check contactor contacts. Microprocessor controls: Check fault history. Check fan control function. Check program settings. Check ambient cut-out function. Check HP / LP cutout function’s Check low oil pressure function. Check pump-down function. Check load / unload function. YORK INTERNATIONAL...
Page 182: Section 10 Spare Parts
BMLT 025-29964-000 Other spare parts vary depending on the unit model. Contact your local YORK Sales and Service Center for information and please quote the unit model number and serial number. When ordering spare parts, we will require the follow-...
Page 183: Section 11 Troubleshooting
Check that the compressor unloads correctly. Measured temperature is incorrect. Check sensor calibration, location and wiring. Chiller FAULT: VAC Check mains supply is stable and within allowable UNDERVOLTAGE Poor mains supply voltage. limits. displayed. Check for voltage dip on compressor start. YORK INTERNATIONAL...
Page 184 Check suction TEVs and liquid solenoid valve. SYS # CURR LIMITING High compressor motor current has Check if liquid temperature is within operating limits. displayed activated unloading. Check if ambient air temperature is above operating (Compressor current limits. unloading.) YORK INTERNATIONAL...
Page 185: Sensor Calibration Charts
System 4: ............. I/O Board # 2 J7 - 11/3 Discharge Pressure: System 1: ............Micro-board J15-8/3 System 2: ............Micro-board J15-7/1 System 3: ............. I/O Board # 2 J4 - 12/8 System 4: ............. I/O Board # 2 J7 - 12/8 YORK INTERNATIONAL...
Page 186: Limited Warranty Applied Systems
Subject has been received by YORK. to the exclusions listed below, YORK, at its option, will repair or replace, FOB point of shipment, such YORK ALL WARRANTIES AND GUARANTEES ARE VOID IF: products or components as it finds defective.
Page 187: 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 188 P.O. Box 1592, York, Pennsylvania USA 17405-1592 Tele. 800-851-1001 Subject to change without notice. Printed in USA Copyright © by York International Corporation 2000 www.york.com ALL RIGHTS RESERVED Form 201.18-NM4 (700) New Release...

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