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INSTALLATION INSTRUCTION
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.
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.
®
Supersedes: 570.05-N2Y (494)
MODELS W1LC420 AND 530
STYLE B
LIQUID CHILLER
(AIR COOLED)
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.
CAUTION
THIS PRODUCT MUST BE INSTALLED IN STRICT COMPLIANCE
WITH THE ENCLOSED INSTALLATION INSTRUCTIONS AND ANY
APPLIC ABLE LOCAL, STATE, AND N ATIONAL CODES
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
570.05-N4Y (495)
035-13054
Only -25 and -46
voltage codes
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Table of Contents
Related Manuals for York W1LC420
Summary of Contents for York W1LC420
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Page 1: General
GENERAL The above forms and all other forms referenced in this instruc- YORK’s W1LC Packaged Air-Cooled Liquid Chillers provide tion may be ordered from: chilled liquid for all air conditioning applications. They are competely self contained chilling systems utilizing an accessi-... -
Page 2: Table Of Contents
570.05-N4Y TABLE OF CONTENTS General ................1 Water Cooler Freeze Prevention ........10 Inspection................1 Compressor Motor Protection System ......10 Reference ................1 Condenser Fan Motor Control ........... 10 Approvals ................1 Electric Controls..............11 Nomenclature............... 2 MAINTENANCE INSTALLATION General ................12 Limitations................ -
Page 3: Installation
The location should be selected for minimum sun Model exposure and to insure an adequate supply of fresh air for the Limitations condenser. Avoid locations beneath windows or between struc- W1LC420 W1LC530 tures where normal operating sounds may be objectionable. Min. Cooler Liquid... -
Page 4: Clearances
FIG. 3 - COMPRESSOR HOLD-DOWN NUTS DISCHARGE LINE HOLD-DOWN BRACKET CAUTION: Do NOT remove the discharge line support brack- ets located within the compressor compartment. It Dimensions (Inches) reduces vibration during unit operation. Model W1LC420 118-5/8 86-3/4 CHILLED LIQUID PIPING W1LC530 118-5/8 86-3/4 The cooler inlet and outlet liquid connections are 3 inch nominal pipe size. -
Page 5: Electrical Wiring
570.05-N4Y The chilled liquid lines that are exposed to outdoor ambient ELECTRICAL WIRING should be wrapped with supplemental heater cable and insu- WARNING: All power and control wiring must be in accordance lated to protect against freeze-up during low ambient periods with national and local electrical codes. - Page 6 Power Supply Qty. (Amps) (AWG) (Ft.) (each) (Amps) 88.5 212 @ 208 208/230-3-60 208/230-1-60 0000 each each 227 @ 230 W1LC420 44.3 460-3-60 460-1-60 each each 88.5 226 @ 208 208/230-3-60 208/230-1-60 237 @ 230 W1LC530 44.3 460-3-60 460-1-60 67.5 250 Amps on part winding start.
- Page 7 570.05-N4Y CLEARANCES BASIC UNIT DIMENSIONS FRONT 36" MODEL BACK 24"* W1LC420 127-1/4 91-1/8 51-5/8 118-5/8 86-7/8 22-1/2 6-1/4 LEFT SIDE 24"* W1LC530 127-1/4 91-1/8 55-5/8 118-5/8 86-7/8 6-1/4 RIGHT SIDE 24"* 120" One side only. COOLER DIMENSIONS & WEIGHTS NOTE: The area within the clearances shown above and area under the unit...
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Page 8: Operation
570.05-N4Y OPERATION CHECKING THE SYSTEM PRIOR TO Turning OFF the main power supply will stop the unit immediately. INITIAL START UP 6. To determine if the unit is operating properly, the refrigerant With the system piping and electrical wiring completed, the unit subcooling and superheat should be checked. -
Page 9: Part-Winding Start
570.05-N4Y PART-WINDING START (SYSTEM #1) 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 Units with voltages of 208/230 and 380/415 have two compres- described in the HIGH / LOW PRESSURE LOCKOUT sor contactors and include part winding start. -
Page 10: Water Cooler Freeze Prevention
4HP will close to energize relay 10R. When contact 10R-1 opens and contact 10R-2 closes, condenser fan EXAMPLE W1LC420: #7 will be powered through choke coil 2CH and its speed will drop to 450 RPM. Timer 7TR will remain open for 10 seconds NO. -
Page 11: Electric Controls
Differential. The flow rate is set to 2.4 GPM/measured TON, the freeze control bulb drops below 36 ° F, the freeze (10°F range) and the working fluid is water. The W1LC420 is a control may have tripped and needs to be manually 4 stage machine with stages at 25%, 50%, 75% and 100% reset before the unit will start. -
Page 12: Maintenance
BEEN FILLED OUT AND RETURNED TO THE FACTORY. Unitary Products Group P.O. Box 1592, York, Pennsylvania USA 17405-1592 Subject to change without notice. Printed in U.S.A Copyright © by York International Corporation 1994. All Rights Reserved. 570.05-N4Y Code: SBY...