Power Supply Options (All Models) ....18 Chilled Liquid Pump ........... 28 Single-Point Power Supply Connection ..... 18 Common Run Signal ........... 28 Multiple Point Power Supply Connection (Standard) ............18 System Alarm ............28 Building Automation System (BAS) Interface ... 18 YORK INTERNATIONAL...
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1.23 Pumpdown (LLSV) Control .................... 43 1.24 Lead / Lag Compressor Selection ................... 43 2. CONTROL PANEL PROGRAMMING AND DATA ACCESS ........... 44 Display and Status Keys ....................44 Program and Setup Keys ....................44 3. STATUS KEYS ............................. 45 General ..........................45 YORK INTERNATIONAL...
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Slide Valve Position ......................68 Compressor Starting and Loading Sequence ..............68 Compressor Loading ....................... 69 Loading Limiting ......................69 Compressor Unloading and Shutdown Sequence ............69 7.10 Local Cooling Setpoints Key ..................69 7.11 Remote Cooling Setpoints Key ..................70 YORK INTERNATIONAL...
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Isolator Selection Data .......................... 98 Isolator Details ............................99 Compressors ............................100 SECTION SPARE PARTS ......................101 Recommended Spare Parts ........................101 Recommended Compressor Oils ......................101 Associated Drawings ..........................101 SECTION DECOMMISSIONING, DISMANTLING AND DISPOSAL ........102 General ..............................102 YORK INTERNATIONAL...
Center. See Commissioning, page 33. specified in this manual. • Only genuine YORK approved spare parts, oils and This manual contains all the information required for refrigerants must be used.
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.
For more comprehensive information on electrical supply from the control system, thus shutting safety precautions for use of refrigerants and oils, refer down the unit. to the Materials Safety Data tables provided on pages 9 through 11. YORK INTERNATIONAL...
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...
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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.
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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. YORK 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.
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The 50 Hz motor operates at 2950 rpm to direct drive the male rotor which in turn drives the female rotor on a light film of oil. YORK YCWS chillers are designed for water or wa- ter-glycol cooling. Each compressor is direct drive, semi-hermetic, rotary twin screw type and includes the following items: All models are designed for indoor installation.
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A 350 watt (115V 1 Ø 50 Hz) immersion heater is lo- ing load. cated in the compressor. The heater is temperature ac- tivated to prevent refrigerant condensation. YORK INTERNATIONAL...
The oil level should never be above the Water vent and drain connections are included. The top of the “upper” sight glass. cooler is insulated with flexible closed-cell foam. YORK INTERNATIONAL...
10% FLA and shuts The standard functions include: water or glycol cool- the system down. ing, automatic pump down, demand load limiting from YORK INTERNATIONAL...
(refer to Section 5 for Status Key details). Integral trip curves allow for in-rush currents This key provides a display of the current operational during Star/Delta and DOL starting without nuisance and/or fault status of the unit or the individual refriger- tripping. YORK INTERNATIONAL...
BAS. six safety shutdowns. Entry Keys A YORK ISN Building Automation System can provide a Pulse Width The numeric and associated keys are used for enter- Modulated (PWM) signal direct to the ing data required for programming the chiller.
Language LCD and Keypad Printer Standard display language and keypad is English. Span- Hand held printer for obtaining printout of unit operat- ish is available as an option. ing data and history data. YORK INTERNATIONAL...
5 6 7 8 11 12 13 14 15 BASE PRODUCT TYPE NOMINAL CAPACITY UNIT DESIGNATOR REFRIGERANT VOLTAGE/STARTER DESIGN / DEVELOPMENT LEVEL :Design Series F : YORK Standard Unit :R-22 :Engineering :Wye-Delta : Chiller Change : Water Cooled or PIN Level : Screw...
Sales Order. Major damage must be reported immediately to your If the unit is to be put into storage, before installation, local YORK representative. the following precautions should be observed: Ensure that all openings, such as water connections, MOVING THE UNIT are securely capped.
AT COMPRESSOR TERMINAL BOX USING THE 2 LIFTING LUGS END SEE DETAIL ABOVE (SUPPLIED AS AN ACCESSORY) NOTE: DISCONNECT THE NUMBERED CONTROL WIRING INSIDE THE PANEL UNFASTEN 6 BOLTS ON CONTROL PANEL CROSS MEMBER LD06595 FIG. 5 – CONTROL PANEL REMOVAL YORK INTERNATIONAL...
(3) so that a concrete base can be poured and having a 1" N.P.T. connection can resting on the ground (1) , with a corkboard (4) installed be obtained from YORK as an option on both sides, and a waterproof sealing compound (5). for the unit.
Aerated, brackish or salt water is not recommended for use in the water system(s). YORK recommends that a • Thermometer and pressure gauge connections water treatment specialist is consulted to determine that...
L = length of pipe in meters tended to ensure safe and satisfactory operation of the C = value in table below unit. Failure to follow these recommendations could cause harm to persons, or damage to the unit, and may invalidate the warranty. YORK INTERNATIONAL...
If the switch is set to the “ON” position before using the wire sizes detailed in Section 9. commissioning then it must be reported to YORK, oth- Connect each of the earth grounds to the main protec- erwise the warranty may be invalidated.
Closure of suitable contacts connected to terminals 28 start/stop for the pump in conjunction with the daily and 13 will enable a hard copy printout of Operating start/stop schedule. If no schedule is set, and the cus- Data/Fault History to be obtained (an optional printer YORK INTERNATIONAL...
Remote Setpoint Offset – Temperature (PWMT) offset of EMS% CURRENT LOAD LIMIT. Timed closure of suitable contacts connected to termi- nals 27 and 13 (PWM contacts) will give remote offset function of the chilled liquid setpoint if required. YORK INTERNATIONAL...
Installation CONNECTION DIAGRAM LD06947 FIG. 12 – MULTI POINT POWER SUPPLY CONNECTION - STANDARD UNIT LD06948 FIG. 13 – SINGLE-POINT POWER SUPPLY WITH INTERNAL CIRCUIT BREAKER OR NON-FUSED DISCONNECT SWITCH YORK INTERNATIONAL...
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2. The above recommendations are based upon the National Electric Code and the use of copper connectors only. Field wiring must comply with local codes. 3. Single point Non-Fused Disconnect Switch is not offered with additional separate Non-Fused Disconnect Switches YORK INTERNATIONAL...
The voltage to these circuits is removed when the common point of isolation to the unit is opened. This common point of isolation is not supplied by YORK. The YORK voltage free contacts are rated at 125VA. All inductive devices (relays) switched by the YORK voltage free contacts must have their coil suppressed using standard R/C suppressors.
Control panel: Check the panel to see that it is free of by YORK Authorized personnel. If the switch has been foreign materials (wire, metal chips, etc.) and clean out set to the ‘ON’ position before commissioning then it if required.
Ensure the cooling liquid temperature sensor is coated Interlocks: Verify that liquid is flowing through the with heat conductive compound (Part No. 013-00890- cooler and that heat load is present. Ensure that any re- YORK INTERNATIONAL...
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‘ON’ position and restart liquid refrigerant will be seen in the liquid line sight glass. the unit. Check that loading occurs as specified in the MBCS and that general operation is correct. After several minutes operation and providing a full charge YORK INTERNATIONAL...
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The units are designed to work independently, or in on the lead compressor, the control system will adjust conjunction with other equipment via a YORK ISN the unit load depending on the chilled liquid tempera- building management system or other automated con- ture and rate of temperature change.
ARB boards, and the 40 character display to operate the energized, both sides of the relay coils or triacs will be integrated circuitry. The 24VAC is filtered, but not regu- at +12VDC potential. lated, to provide unregulated + 24VDC to supply the YORK INTERNATIONAL...
The logic section of the control panel compressor if motor cooling is inadequate. contains the relay output boards (ARB), which have 115VAC connected The onboard CTs provide 3-phase current protection to them. which look at phase current and send an analogue sig- YORK INTERNATIONAL...
The maximum allowable running current for each com- signal. After 30 minutes, if no refresh is provided, the pressor can be adjusted remotely to a lower value us- setpoint will change back to its original value. ing repeated timed closure of ‘voltage free’ contacts YORK INTERNATIONAL...
Kit is connected to the microproces- cessor will ignore closures of less than 1 second. sor. The Remote Control Center will To calculate the necessary contact closure time to pro- always determine the setpoint. vide a required Reset, use the following steps: YORK INTERNATIONAL...
1.18 CHILLED LIQUID PUMP CONTACT ‘PROGRAM’ key to ‘MANUAL’. ‘MANUAL’ restart requires a reset us- YORK provides a voltage free contact terminals 5 and 6 ing the unit ON/OFF switch under the which close to start a pump. This contact can be used as keypad.
The compressor continues to operate to try to maintain chilled liquid temperature as close to until it either pumps down to the low suction pressure setpoint as possible. cutout setting or for 180 seconds, whichever comes first. YORK INTERNATIONAL...
This key is used for display and programming of the This switch shuts down the entire chiller when placed chiller operational settings and limits. in the ‘OFF’ position. The switch must be ‘ON’ for the chiller to operate. YORK INTERNATIONAL...
S W I T C H for systems 3 and 4 should only be in the ‘ON’ position T H E O F F P O S I T I O N for three and four system models respectively. YORK INTERNATIONAL...
P U M P I N G D O W N The chilled liquid temperature is below the point where Both refrigerant systems are in a pump-down cycle. the microprocessor will bring the lead system on and/ Pump down display messages occur on shutdowns YORK INTERNATIONAL...
This message should never appear, if it does consult the high pressure cutout. your local YORK office. This message is a warning that the setting for the type of refrigerant used with the The operation of this safety is important if condenser unit has been tampered with and the unit will not run.
Closing of the flow switch, when flow is present, will The cutout is programmable and can be set for lower cause the message to disappear and auto-restart to occur. limit values if required. YORK INTERNATIONAL...
This type of oil failure will not be picked up by the High Oil Differential Safety since no flow will cause This cutout protects the compressor rotors from dam- the differential through the oil piping to drop to zero. age due to overheating, expansion, and breakdown of YORK INTERNATIONAL...
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3 bar for R-22 and R407C are recommended. SUCTION PRESSURE = PROGRAMMED CUTOUT * (RUN TIME - 25) If the switch is set for ‘Brine Cooling’ (glycol) the cut- CUTOUT out is programmable between 0.3 to 5 bar for both R- YORK INTERNATIONAL...
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6 = OUT OF RANGE DIP SWITCH SETTINGS pressor that is not pumping due to a mechanical mal- function. Motor current is monitored using 3 current 7 = UNBALANCE > 50% transformers (CTs) per motor, one on each phase. 8 = PHASE LOSS YORK INTERNATIONAL...
A fault lock-out will result if safety thresholds are ex- ceeded three times in a 90 minute period. present, occasional faults may occur with the corresponding automatic print- out. This is not a cause for concern. YORK INTERNATIONAL...
• Discharge superheat 4.2 CHILLED LIQUID TEMPS KEY • Compressor slide valve position When the key is pressed the chiller leaving chilled liq- • Cooler inlet refrigerant temperature uid temperature (LCHLT) and returning chilled liquid temperature (RCHLT) are displayed. YORK INTERNATIONAL...
W A T E R Open: Water cooling mode is for water cooling applications S 1 - 4 Y C W S and allows the chilled liquid leaving temperature set- point to be programmed from 4.4 to 21.1°C. YORK INTERNATIONAL...
The FUNCTION Key can be used to scroll through the displays for: 4.9 FUNCTION KEY • Chilled Liquid Temps • System # Data Pressing this key displays the same message as press- ing the ‘STATUS’ key. • Motor Current • Options YORK INTERNATIONAL...
S Y S T E M N U M B E R 5.3 OPER DATA -– LOCAL DISPLAY MESSAGES This message advises which system is programmed as When the ‘OPER DATA’ key is pressed, the following message appears: the lead. YORK INTERNATIONAL...
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The following sequence of three displays are provided first for System 1 and then for Systems 2: S Y S R U N T I M E 1 1 - 1 5 - 1 0 D - H - M - S YORK INTERNATIONAL...
5.4 OPER DATA - REMOTE PRINTOUT The following shows a typical example YCWS print- out obtained by pressing the ‘OPER DATA’ key with an optional printer attached. YORK INTERNATIONAL CORPORATION MILLENNIUM SCREW CHILLER SYSTEM 1 DATA UNIT STATUS COMPRESSORS STATUS...
P R E S S U R E After the ‘ENTER’ Key is pressed, a message indicat- U N L O A D 2 5 . 8 5 B A R G ing the time and date of the Fault Shutdown will appear: YORK INTERNATIONAL...
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L E A D S Y S T E M • Wye-Delta timer output. S Y S T E M N U M B E R YORK INTERNATIONAL...
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4 9 . 6 ° C S Y S # S A T D S C H = 5 4 . 4 ° C S U C T H E A T 1 2 . 5 ° C YORK INTERNATIONAL...
Two refrigerant system chillers will provide a history printout of the last 6 faults. An example of the first of the 6 HISTORY Printouts is shown below: YORK INTERNATIONAL CORPORATION SYSTEM 1 DATA MILLENNIUM SCREW CHILLER WATER COOLED LIQUID CHILLER...
‘PRINT’ KEY Section. printer). • Serial printer should be set for data bits=8 YORK offer a kit which includes a printer which has parity=none and baud rate=1200. an internal Ni-cad battery, a roll of paper, a ‘D’ type •...
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These conditions will be stored in memory until they can be transmitted to the or the microprocessor board. YORK assumes no re- sponsibility for assistance or damage in the use of non- printer and printed.
If this is not done, the new values entered will the cursor is over ‘AM’ or ‘PM’ on the display. For be lost and the original values will be restored. example, pressing the ‘á’ key when the cursor is on ‘PM’ changes it to ‘AM’. YORK INTERNATIONAL...
This is accomplished by analyzing the temperature er- point and the range. The range and is the maximum ror (ERROR) and the rate of change (RATE) to deter- acceptable + and - deviation from setpoint. mine the amount of loading necessary to cool the chilled YORK INTERNATIONAL...
• The lag compressor will then be loaded until it also reaches a slide valve step of ‘40’ while the lead Fixed timers are set to minimize undershoot and over- compressor is maintained at a constant load. shoot as a result of slide valve control. YORK INTERNATIONAL...
10 steps between sys- tems 1 and 2. It could only load system 1 ‘2’ steps while loading system 2 ‘8’ steps. Under these circumstances, the two systems will not appear to equalize loading. YORK INTERNATIONAL...
This feature application, remembering to use a leading ‘0’ for val- ues less than 10°C. Press the ‘ENTER’ key to store the is typically used for demand limiting or ice storage applications. new value in memory. YORK INTERNATIONAL...
Press ‘ENTER’ to move to the hour part of the display. disappear and the ‘live’ clock will be Next, key in the time (hours/minutes) using a leading displayed. ‘0’ for times before 10 o’clock. e.g. 08:31. YORK INTERNATIONAL...
‘*’ key. If a day marked as a holiday is grammed for the remainder of the not to be a holiday, press the ‘*’ key. week to the Monday schedule. When the ‘*’ key is pressed, the cursor will advance to YORK INTERNATIONAL...
Chiller ‘ON/OFF’ switch is ‘ON’, remote cycling to be repeated to bring the chiller back devices are closed, and system switches permit. on line. Normally this key is only used for servicing when the YORK INTERNATIONAL...
13.8 and 27.52 bar. If an unacceptable value is entered at any stage, the following message is displayed for a few seconds and the entered value is ignored: YORK INTERNATIONAL...
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T E M P C U T O U T 5 4 . 0 ° C PROGRAMMED X RUN TIME / 3 +10 CUTOUT The high ambient temperature cutout is used to select the ambient temperature above which the chiller may YORK INTERNATIONAL...
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The anti-recycle timer controls the minimum time be- set at 2.2°C and cannot be reprogrammed. tween starts for each compressor. This is the time avail- If the Dip Switch (S1) on the AMB board is set for ‘GLY- YORK INTERNATIONAL...
‘á’ or ‘â’ keys are used to change from ‘AUTO- • Voltage read on input MATIC’ to ‘MANUAL’ lead/lag. • Converted value (example: 3.75 BARG) If ‘MANUAL’ control is desired, press the ‘á’ or ‘â’ key. One of the following messages will be displayed: YORK INTERNATIONAL...
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TO 3.3 BARG WATER GLYCOL HIGH AMBIENT TEMP CUTOUT 45.0°C STANDARD LOW AMBIENT TEMP CUTOUT -3.9°C STANDARD LEAVING LIQUID TEMP CUTOUT 2.2°C WATER -12.9 to 2.2°C GLYCOL HIGH MOTOR CURRENT UNLOAD 30 to 105% FLA ANTI-RECYCLE TIME 300 - 600 SECONDS YORK INTERNATIONAL...
“REM SETP = XXX°F” * Max Reset Value is the “Max EMS-PWM Remote Temp. Reset” setpoint value described in the programming section under Cooling Setpoints. Programmable values are from 2°F to 40°F (1.11°C to 22.22°C). YORK INTERNATIONAL...
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NOTE: The coil of any added relay used for reset must be suppressed to prevent possible component f a 4-20mA signal is available, it is applied to terminals damage. Use YORK PN031-00808-000 A+ and A- and jumpers are applied to JU5 and JU3 suppressor.
If damage or a system failure occurs due to tations given in the MBCS manual. improper maintenance during the warranty period, YORK shall not be liable for costs incurred to return Compressor Oil Level: Check the compressor oil level the unit to satisfactory condition.
Check the compressor unloads correctly. Measured temperature is incorrect. Check sensor calibration, location and wiring. Chiller FAULT: VAC Poor mains supply voltage. Check mains supply is stable and within allowable UNDERVOLTAGE limits. displayed Check for voltage dip on compressor start. YORK INTERNATIONAL...
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Check operation of motor cooling, TEVs and liquid solenoid valve. SYS # CURR LIMITING High compressor motor current Check liquid temperature is within operating limits. displayed has activated unloading. Check if ambient air temperature is above unloading). (Compressor current operating limits. YORK INTERNATIONAL...
CURVE MODEL *Review cutoff limits YCWS0313SC, in Design Parameters H,K,M YCWS0373SC - 0663SC* Table FIG. 22 – COOLER WATER PRESSURE DROP LD06951 CURVE MODEL YCWS0313SC, 0373SC, 0423SC YCWS0503SC, 0563SC YCWS0613SC, 0663SC FIG. 23 – CONDENSER WATER PRESSURE DROP YORK INTERNATIONAL...
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TABLE 13 – RECOMMENDED GLYCOL SOLUTION STRENGTHS Propylene Glycol Ethylene Glycol Concentration Concentration LCHLT °C % w/w % w/w LD06934 A = Correction Factor B = Temperature C = Concentration % Through Cooler FIG. 24 – GLYCOL SOLUTION STRENGTHS YORK INTERNATIONAL...
Sound Pressure Levels (SPL), dB re 20 microPa in accordance with ARI Standard 575-94 TABLE 15 – SOUND DATA WEIGHTED MODEL COMP. dB ‘A’ YCWS0313SC YCWS0373SC YCWS0423SC YCWS0503SC YCWS0563SC YCWS0613SC YCWS0663SC NOTE: All ‘A’ weighted sound pressure data ± 3 dBA...
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FORM 201.24-NM2 THIS PAGE INTENTIONALLY LEFT BLANK TO MAINTAIN PAGE FORMAT. YORK INTERNATIONAL...
SYSTEM #1 VOLT MAX DUAL CHILLER MIN NF CODE CIR. DUAL FUSE MODEL DISC SW FUSE MAX CB YCWS0313SC YCWS0373SC YCWS0423SC YCWS0503SC YCWS0563SC YCWS0613SC YCWS0663SC INCOMING WIRE SIZE (FIELD SUPPLIED WIRING) SYSTEM #2 SYSTEM #1 VOLT CHILLER TERM TERM...
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FORM 201.24-NM2 ELECTRICAL DATA SYSTEM #2 VOLT MAX DUAL CHILLER MIN NF CIR. DUAL CODE FUSE MODEL DISC SW FUSE MAX CB YCWS0313SC YCWS0373SC YCWS0423SC YCWS0503SC YCWS0563SC YCWS0613SC YCWS0663SC YORK INTERNATIONAL...
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SYSTEM #1 SYSTEM #2 VOLT MAX DUAL MIN N/F CHILLER DUAL CODE FUSE DISC SW MODELS FUSE MAX CB YCWS0313SC YCWS0373SC YCWS0423SC YCWS0503SC YCWS0563SC YCWS0613SC YCWS0663SC INCOMING WIRE SIZE (FIELD SUPPLIED WIRING) SYSTEM #1 & #2 VOLT CHILLER CODE TERM...
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This disconnect is not intended to be a Load Break Device. 9. Field Wiring by others which complies to the National Electrical Code & Local Codes. YORK INTERNATIONAL...
Technical Data DIMENSIONS – MODELS YCWS0313SB-0663SB Different for every Model MODEL DIM. YCWS0313SC YCWS0373SC LD06952 YCWS0423SC YCWS0503SC YCWS0563SC YCWS0613SC YCWS0663SC LD06953 All dimensions are in mm unless otherwise noted. LD06954 FIG. 25 – MODELS YCWS0313SB - YCWS0663SB DIMENSIONS YORK INTERNATIONAL...
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1111 1111 1038 1038 1038 1038 1038 1038 1038 NOTES: 1. CLEARANCES - Recommended YORK clearances to service the unit are as follows: Rear to Wall: 508mm Front to Wall: 813mm Top: 508mm Tube cleaning and removal: 2438mm (either end) 2.
If no isolation valves are installed it may be Only use lifting equipment of ad- necessary to drain the complete system. equate capacity. After removal from position the unit parts may be dis- posed of according to local laws and regulations. YORK INTERNATIONAL...
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FORM 201.24-NM2 NOTES YORK INTERNATIONAL...