McQuay WSC Product Manual

2 Product Manual PM WSC/WDC
Table of Contents
Introduction............................................3
Design Advantages.................................4
Dual Compressor Design..................................4
HFC-134a:............................................................5
Compressor Design...........................................7
Compact Design...............................................11
Heat Exchangers...............................................12
Lubrication System..........................................12
SurgeGard.......................................................13
Pumpdown ........................................................13
Thermal Expansion Valves..............................13
Factory Performance Test...............................14
McQuayService Startup..................................14
WDC Design Features..........................15
The Redundancy Feature ...............................15
Part Load Efficiency.........................................16
Lower Installed Costs......................................17
Bolt Together Construction ...........................17
WDC Chiller Controls......................................17
Control Features...................................19
Building Management Systems .....................22
Multiple Machine Control..............................22
Sound...................................................25
Unit Selection.......................................26
Chiller Identification..............................28
Physical Data and Weights....................29
Condenser.........................................................29
Evaporator.........................................................30
Compressor.......................................................31
Relief Valves......................................................31
Pumpout Units..................................................32
Dimensions...........................................33
Chillers ...............................................................33
Marine Water Boxes ........................................43
Weights .............................................................44
Pumpout Units..................................................46
Electrical Data......................................47
Motor and Voltage Code.................................47
Motor Data........................................................47
Field Wiring.......................................................51
Control Power...................................................52
Motor Starters......................................53
Application Considerations.....................56
Pumps.................................................................56
Evaporator Water Temperature......................56
System Water Volume .....................................56
Condenser Water Temperature......................56
Oil Coolers.........................................................57
Machine Room Ventilation.............................58
Thermal Storage................................................59
Variable Speed Pumping..................................59
Variable Frequency Drives..............................59
Free Cooling......................................................60
Vibration Mounting.........................................60
Options and Accessories .......................61
Specifications .......................................63
(Cover picture: Model WDC 126, 2300 ton dual compressor chiller)
Our facility is ISO9002 Certified
Initial Issue September, 1998
"McQuay" is registered trademarks of McQuay International

1996 McQuay International
"Illustrations cover the general appearance of McQuay International products at the time of publication and we reserve the right
to make changes in design and construction at anytime without notice"

McQuay WSC Specifications

General

Brand	McQuay
Model	WSC
Category	Controller
Language	English