Service Manual

PRODUCT DESIGN

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.

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.

NOTE: A roof curb can be used to utilize bottom discharge.

APG/GPG Package Units are designed for outdoor installa-

tions only in either residential or light commercial applica-

tions.

NOTE: To ensure proper condensate drainage, unit must be

installed in a level position.

The connecting ductwork (Supply and Return) can be con-

nected for either horizontal or down discharge airflow. In the

down discharge applications a matching Roof Curb is recom-

mended .

A return air filter must be installed behind the return air grille(s)

or provision must be made for a filter in an accessible location

within the return air duct. The minimum filter area should not

be less than those sizes listed in the Specification Section.

Under no circumstances should the unit be operated without

return air filters.