Specifications

IMM WMC-2 Centrifugal Chillers 5
Location and Mounting
Clearance
The unit must be mounted on a level concrete or steel base and must be located to provide service clearance at
one end of the unit for possible removal of evaporator and/or condenser tubes. Evaporator and condenser tubes
are rolled into the tube sheets to permit replacement if necessary. The length of the vessel should be allowed at
one end. Doors or removable wall sections can be utilized. Clearance at all sides, including the top, is 3 feet (1
meter). The U.S. National Electric Code (NEC) or local codes can require more clearance in and around
electrical components (4-feet in front of electrical panels) and must be checked for compliance.
Vibration Pads
The shipped-loose neoprene vibration pads (shipped in the power panels) should be located under the corners of
the unit (unless the job specifications state otherwise). They are installed to be flush with the sides and outside
edge of the feet.
Insulation Corners
Insulation corners that cover the rigging holes on the upper corners of the vessel end plates are shipped loose (in
the power panels) and should be installed with adhesive after the init is set in place.
Mounting
Make sure that the floor or structural support is adequate to support the full operating weight of the complete
unit.
It is not necessary to bolt the unit to the mounting slab or framework; but should this be desirable, 1-1/8" (28.5
mm) mounting holes are provided in the unit support at the four corners.
Note: Units are shipped with refrigerant valves closed to isolate the refrigerant in the unit condenser.
Valves must remain closed until start-up by the McQuay technician.
Nameplates
There are several identification nameplates on the chiller:
• The unit nameplate is located on the Unit Control Panel. It has a Model No. XXXX and Serial No. XXXX.
Both are unique to the unit and will identify it. These numbers should be used to identify the unit for
service, parts, or warranty questions. This plate also has the unit refrigerant charge.
• Vessel nameplates are located on the evaporator and condenser. Along with other information, they have a
National Board Number (NB) and a serial number, either of which identify the vessel (but not the entire
unit).
Water Piping
Vessel Drains at Start-up
The unit is tilted and drained of water in the factory and shipped with open drain valves in each head of the
evaporator and condenser. Be sure to close the valves prior to filling the vessel with fluid.
Evaporator and Condenser Water Piping
All evaporators and condensers come standard with groove-type nozzles for Victaulic couplings (also suitable
for welding), or optional flange connections. The installing contractor must provide matching mechanical
connections of the size and type required.
! CAUTION
Freeze Notice: Neither the evaporator nor the condenser is self-draining; both must be blown out
to help avoid damage from freezing temperatures.