Specifications

2 Centrifugal Chillers IMM WMC-2
Table of Contents
Introduction...........................................3
Nomenclature................................................. 3
Installation .............................................4
Receiving and Handling................................. 4
Location and Mounting ........................5
Water Piping .................................................. 5
Field Insulation .............................................. 8
Physical Data and Weights............................. 8
DimensionsError! Bookmark not defined.
Dimensions.............................................9
Pressure Drop Curves.........................16
Relief Valves.........................................17
Electrical Data.....................................19
Power Wiring............................................... 19
WMC 145S, Single Compressor.................. 20
WMC 145D, 150D Dual Compressors ........ 20
WMC250D and 290D Dual Compressor..... 21
Single Point Connection .............................. 22
Use with On-Site Generators ....................... 24
System Pumps.............................................. 25
VFD Line Harmonics................................... 25
Multiple Chiller Setup.................................. 28
Prestart System Checklist.............................30
Operation .............................................31
Operator Responsibilities............................. 31
Compressor Operation ................................. 31
Operating Limits: ......................................... 31
MicroTech II Control ................................... 32
Building Automation Systems............33
Capacity Control System.............................. 35
Surge and Stall ............................................. 36
Normal Unit Startup/Shutdown.................... 36
Annual Unit Startup/Shutdown .................... 37
Maintenance ........................................38
Pressure/Temperature Chart .........................38
Routine Maintenance ................................... 38
Repair of System.......................................... 39
Maintenance Schedule ........................42
Service Programs.................................43
Operator Schools.................................43
Limited Warranty ...............................43
*Unit Controllers are LonMark certified with an optional LonWorks communication module.
Manufactured in an ISO Certified Facility
Document: Catalog WMC-4
Issue Date: August 2007
Replaces: Catalog WMC-2
©2007 McQuay International. Illustrations and data cover the McQuay International product at the time of publication and we reserve
the right to make changes in design and construction at anytime without notice. ™® The following are trademarks or registered
trademarks of their respective companies: BACnet from ASHRAE; L ON M ARK , LonTalk, L ON W ORKS , and the L ON M ARK logo are managed,
granted and used by L ON M ARK International under a license granted by Echelon Corporation; Compliant Scroll from Copeland
Corporation; ElectroFin from AST ElectroFin Inc.; Modbus from Schneider Electric; FanTrol, MicroTech II, Open Choices, and SpeedTrol
from McQuay International.
*