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GENERAL

YORK’s W1LC Packaged Air-Cooled Liquid Chillers provide
chilled liquid for all air conditioning applications. They are
competely self contained chilling systems utilizing an accessi-
ble hermetic compressor, liquid cooler, air cooled condenser
coils and electrical control panel all mounted on a steel base.
They are factory piped, wired, dehydrated, evacuated, leak
tested, pressure tested, functionally tested and fully charged
with Refrigerant-22.

All controls are located in the front of the unit and are readily
accessible for maintenance, adjustment and service. All wiring
(power and control) can be made through the bottom of the
compressor compartment.

REFERENCE

Additional information on the design, installation, operation and
service of air conditioning equipment is available in the follow-
ing reference forms.

55.70-N1

- General Installation

55.70-N2

- Pre-start & Post-start Check List

55.70-N3

- General Service Information

55.05-NM

- Evacuation and Charging

Renewal Parts:

Refer to Parts Manual for complete listing of replacement
parts on this equipment.

The above forms and all other forms referenced in this instruc-
tion may be ordered from:

Publications Distribution Center
Unitary Products Group
P.O. Box 1592, York, Pa.  17405

INSPECTION

As soon as a unit is received, it should be inspected for possible
damage during transit. If damage is evident, the extent of the
damage should be noted on the carrier’s freight bill. A separate
request for inspection by the carrier’s agent should be made in
writing. See Form 50.15-NM for additional information.

LIQUID CHILLER

(AIR COOLED)

INSTALLATION INSTRUCTION

Supersedes:  570.05-N2Y (494)

570.05-N4Y (495)

Installer should pay particular attention to the words:  

NOTE, CAUTION and WARNING. Notes are intended to clarify or make

the installation easier. Cautions are given to prevent equipment damage. Warnings are given to alert installer that personal injury
and/or equipment damage may result if installation procedure is not handled properly.

MODELS W1LC420 AND 530

STYLE B

035-13054

® 

Only -25 and -46

voltage codes

CAUTION

THIS PRODUCT MUST BE INSTALLED IN STRICT COMPLIANCE
WITH THE ENCLOSED INSTALLATION INSTRUCTIONS AND ANY
APPL IC ABL E LO CAL,  STAT E,  AND N ATI ONAL CO DES
INCLUDING, BUT NOT LIMITED TO, BUILDING, ELECTRICAL,

WARNING

INCORRECT INSTALLATION MAY CREATE A CONDITION
WHERE THE OPERATION OF THE PRODUCT COULD CAUSE
PERSONAL INJURY OR PROPERTY DAMAGE

Summary of Contents for W1LC420

Page 1: ...referenced in this instruc tion may be ordered from Publications Distribution Center Unitary Products Group P O Box 1592 York Pa 17405 INSPECTION As soon as a unit is received it should be inspected for possible damage during transit If damage is evident the extent of the damage should be noted on the carrier s freight bill A separate request for inspection by the carrier s agent should be made in...

Page 2: ... 10 Condenser Fan Motor Control 10 Electric Controls 11 MAINTENANCE General 12 Cleaning Condenser Surface 12 Lubricating Fan Motors 12 Compressor Replacement 12 Secure Owner s Approval 12 TABLES No Description Page 1 Application Data 3 2 Physical Data 4 3 Electrical Data 6 4 Electrical Data International Models 6 5 Water Side Pressure Drop 6 FIGURES No Description Page 1 Unit Handling 3 2 Support ...

Page 3: ... location should be selected for minimum sun exposure and to insure an adequate supply of fresh air for the condenser Avoid locations beneath windows or between struc tures where normal operating sounds may be objectionable The condenser fans are propeller type and are not suitable nor intended for use with duct work in the condenser air stream On either rooftop or ground level installations rubbe...

Page 4: ...move the compressor hold down nuts and shipping spac ers Install rubber grommets shipped in bag tied to compressor Replace the hold down nuts and tighten until they start to bind the rubber grom mets Continue to tightened additional half turn See Figure 3 DISCHARGE LINE HOLD DOWN BRACKET CAUTION Do NOT remove the discharge line support brack ets located within the compressor compartment It reduces...

Page 5: ...ut located on the bottom of the electrical box Remove the plastic plug from the knockout and discard See Table 3 or 4 for electrical data The disconnect switch may be bolted to the side of the unit but not to any of the removable panels this would interfere with access to the unit Make sure that no refrigerant lines or coils will be punctured when mounting the disconnect switch and note that it mu...

Page 6: ...LC420 A50 380 415 3 50 2 38 0 each 1651 each 380 415 1 50 3 4 4 2 2 3 2 5 105 110 2 320 380 368 415 A40 380 3 60 2 52 1 each 208 each 460 1 60 3 4 4 2 2 3 2 5 135 150 0 377 W1LC530 A50 380 415 3 50 1 1 38 0 62 7 1651 2252 380 415 1 50 3 4 5 2 2 3 2 5 135 150 0 369 380 412 415 A40 380 3 60 1 1 52 1 77 8 208 307 460 1 60 3 4 5 2 2 3 2 5 170 200 00 357 1100 Amps on part winding start 4Based on three ...

Page 7: ...GHT Lbs Oper Dry W1LC420 10 x 7 4 13 72 1 2 12 7 8 26 800 700 W1LC530 10 x 7 4 13 72 1 2 12 7 8 26 800 700 Nominal pipe size victaulic type COOLER DIMENSIONS WEIGHTS FRONT 36 BACK 24 LEFT SIDE 24 RIGHT SIDE 24 TOP 120 One side only NOTE The area within the clearances shown above and area under the unit must be kept clear of all obstructions that would impede free air flow to the unit In installati...

Page 8: ... off after completion of the pumpdown cycle Turning OFF the main power supply will stop the unit immediately 6 To determine if the unit is operating properly the refrigerant subcooling and superheat should be checked SEQUENCE OF OPERATION NOTE The contact opening and closing times for 50 HZ units are 5 6 of those listed for 60 HZ units System start up and staging is controlled by the TC which is e...

Page 9: ...ressor crankcase heater 2CCH while the compressor runs 4 After 2 minutes low pressure bypass timer 5TR 1 opens If the compressor suction pressure remains abnormally low after initial start up the compressor circuit will lock out as described in the HIGH LOW PRESSURE LOCKOUT section When the fourth stage of the TC 81 calls for cooling 1 Contacts TC 7 will close to energize relay 11R and 12R 2 When ...

Page 10: ...e drops below 180 psig high pressure con trol 2HP will close to energize relay 3R When contact 3R 1 opens and contact 3R 2 closes condenser fan 3 will be powered through choke coil 1CH and its speed will drop to 450 RPM Timer 3TR will remain open for 10 seconds after unit start up so the condenser fan 3 will always start at high speed NO 2 20 TON SYSTEM Under 65 F the 4 condenser fan will shut off...

Page 11: ... 100 capacity All temperatures considered are for a TC 6A control and thermistor working at design conditions Allowable toler ances could change the actuation temperatures by 1 25 F With the RETURN water temperature to the cooler rising due to increasing cooling load for the application the 1 compres sor will start at part load when the RETURN water temperature reaches 47 75 F The LEAVING water te...

Page 12: ... means Take care so as not to damage or bend the condenser fins LUBRICATING FAN MOTORS The condenser fan motors are equipped with factory lubricated and sealed ball bearings requiring no maintenance COMPRESSOR REPLACEMENT Obtain replacement compressors or parts from your local Copeland Wholesaler See Instruction Form 55 72 RD2 2 for replacement compressor reference data SECURE OWNER S APPROVAL WHE...

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