Service Manual

PRODUCT DESIGN
15
Locations and Clearances
NOTE: To ensure proper condensate drainage, unit must be
installed in a level position.
In installations where the unit is installed above ground level
and not serviceable from the ground (Example: Roof Top
installations) the installer must provide a service platform for
the service person with rails or guards in accordance with local
codes or ordinances or in their absence with the latest edition
of the National Fuel Gas Code ANSI Z223.1.
24”
Min.*
24”
Min.*
36” Min.
*
Unit Clearances
*In situations that have multiple units, a 48” minimum clearance
is required between the condenser coils.
Adequate clearance around the unit should be kept for safety,
service, maintenance, and proper unit operation. A total
clearance of 75” on the main control panel side of the unit is
recommended to facilitate possible fan shaft, coil, electric
heat and gas furnace removal. A clearance of 48” is
recommended on all other sides of the unit to facilitate
possible compressor removal, to allow service access and to
insure proper ventilation and condenser airflow. The unit must
not be installed beneath any obstruction. The unit should be
installed remote from all building exhausts to inhibit ingestion
of exhaust air into the unit fresh air intake.
NOTE: If the 36" minimum is used on the control panel side
of an A/GPG unit, a flue extension (MF#220-GX-01) needs to
be installed to prevent flue gas recirculation.
PROTRUSION
Inspect curb to ensure that none of the utility services
(electric) routed through the curb protrude above the curb.
NOTE: Roof overhang should be no more than 36".
Minimum clearances are required to avoid air recirculation
and keep the unit operating at peak efficiency. A minimum
12 inch clearance is required to the condenser coil.
NOTE: The flue outlet hood is packaged separately inside
the unit and must be installed prior to operation.
WARNING
TO PREVENT POSSIBLE DAMAGE, THE UNIT SHOULD
REMAIN IN AN UPRIGHT POSITION DURING ALL
RIGGING AND MOVING OPERATIONS. TO FACILITATE
LIFTING AND MOVING IF A CRANE IS USED, PLACE
THE UNIT IN AN ADEQUATE CABLE SLIDE.
IMPORTANT NOTE: If using bottom discharge with roof
curb, ductwork should be attached to the curb prior to
installing the unit.
Refer to Roof curb Installation Instructions for proper curb
installation. Curbing must be installed in compliance with the
National Roofing Contractors Association Manual.
Lower unit carefully onto roof mounting curb. While rigging
unit, center of gravity will cause condenser end to be lower
than supply air end.
2 - 4 Ton
5 Ton