Specifications

Greater Reliability
Exceptional Control
Oil Handling Equipment Removed
User-Friendly Touch Screen Panel
With magnetic bearings operating in a magnetic
electrical field instead of oil lubricated ball or roller
friction type bearings as the basis of design, the oil
handling equipment is removed. There is no need
for oil pumps, oil reservoirs, controls, starter,
piping, heaters, oil coolers, oil filters, water
regulating valves or oil relief valves that are needed
to maintain oil quality. These devices can be a
source of problems in traditional chillers, and
removing them significantly increases unit
reliability.
Every WMC chiller is provided with the user-
friendly operator interface touch screen panel
mounted on the moveable positioning arm for easy
viewing and operation. View chiller status, clear
faults and change operating parameters by merely
touching the screen. For added convenience, the unit
operating and maintenance manual is viewable on
the screen and can also be downloaded and printed
via the USB port located in the control panel.
Dual Compressors - One Refrigerant
Circuit
Flexible BAS Interface Modules
All WMCs, except Model WMC 145S, have two
compressors on a common refrigerant circuit,
greatly improving system reliability. In the event of
a mechanical or electrical problem (excluding the
rare motor burn), one of the two compressors will
continue to operate until repairs can be made. The
chiller can continue to provide up to sixty percent
of full load tons. Also, the two compressors in a
single refrigerant circuit are one of the secrets for
the tremendous part-load efficiency. At part load,
where most of the operating hours occur, the entire
vessel surface is active providing extremely
efficient operation.
Every WMC chiller with MicroTechII controls and
the Open Choices™ feature can be provided with
L
ONWORKS®, BACnet®, or Modbus®
communications modules for an easy, low cost
connection to the building automation system of
your choice. Expensive and complex interface
gateways are not required. Modules can also be
easily retrofitted after installation.
The compact L
ONWORKS® communication module
that is installed in the microprocessor is shown
below with a quarter to show relative size.
Two Compressors
Single Expansion Valve Feed
Catalog WMC-4 5