Installation
Installation must be performed by qualified personnel who are familiar with local codes
regulations, and experienced with this type of equipment
Start-up by McQuayService is included on all units sold
for installation within North America
excluding Mexico. Two weeks prior notification of start-up is required. The contractor should obtain
a copy of the Start-up Scheduled Request Form from the sales representative or from the nearest
McQuayService office.
Location and Mounting
Mount the unit on a level concrete or steel base. Service clearance (at either end of the unit) is 14 feet
for units with 12-foot long standard shells and 18 feet for units with 16-foot long optional shells.
Evaporator and condenser tubes are rolled into the tube sheets to permit replacement. Clearance at all
other points, including the top, is 3 feet.
Make certain the floor or structural support is adequate to support the full operating weight of the
complete unit. Optional rubber-in-shear pads. or spring isolators can be ordered for use under each
corner of the base members. It is not necessary to bolt the unit to the mounting slab or frame work:
although mounting holes are provided in the unit support at the four corners.
Compressor Condensation
Condensation occurs on the compressor surface when the temperature of the compressor surface is
lower than the ambient dew point temperature. Drain pans with drain connections are provided
underneath each compressor to collect the condensate. The compressor motor housing extends past
the drain pans. Install a floor drain close to the unit to collect condensate from motor housing and
condensate pans.
Vibration Isolators
Vibration isolator pads are shipped with the unit for field installation. These pads provide minimal
isolation. Vibration isolators are recommended on all upper level installations where vibration
transmission is a consideration. When vibration isolators are used. install springs under the main unit
supports. Adjust spring so the upper housing clears lower housing by at least 1/4" (6mm) and not
more than 1/2"
(1
3mm). If hold-down bolts are not used. install a rubber anti-skid under isolators.
Install vibration eliminators in water piping to reduce piping strain. vibration. and noise. Table l lists
spring and rubber-in-shear isolators for all PFS unit sizes
4 IM 663
