Roof curb post-installation checks, Roof top duct connections – Goodmans COMMERCIAL HEATING & COOLING 3 TON - 6 TON PACKAGE GAS UNIT CPG SERIES User Manual
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Adequate clearance around the unit should be kept for safety,
service, maintenance, and proper unit operation. A total clear-
ance of 75” on the main control panel side of the unit is rec-
ommended 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 venti-
lation and condenser airflow. The unit must not be installed
beneath any obstruction. The unit should be installed re-
mote from all building exhausts to inhibit ingestion of exhaust
air into the unit fresh air intake.
INSULATED
PANELS
Roof Curb Installation
ROOF CURB POST-INSTALLATION CHECKS
After installation, check the top of the curb, duct connection
frame and duct flanges to make sure gasket has been ap-
plied properly. Gasket should be firmly applied to the top of
the curb perimeter, duct flanges and any exposed duct con-
nection frame. If gasket is loose, re-apply using strong
weather resistant adhesive.
P
ROTRUSION
Inspect curb to ensure that none of the utility services (elec-
tric) routed through the curb protrude above the curb.
I
F
PROTRUSIONS
EXIST
,
DO
NO
ATTEMPT
TO
SET
UNIT
ON
CURB
.
CAUTION
ROOF TOP DUCT CONNECTIONS
Install all duct connections on the unit before placing the unit
on rooftop.
H
ORIZONTAL
D
ISCHARGE
For horizontal discharge, remove the supply and return duct
covers and place them over the vertical discharge return and
supply openings. Install with insulation facing up, using the
longer screws provided in the literature package.
Ensure that the top of the duct connection frame is flush with
the top of the roof curb.
Flexible duct connectors between the unit and ducts are rec-
ommended. Insulate and weatherproof all external ductwork
and joints as required and in accordance with local codes.
SUPPLY
12”
17”
7 3/8”
11”
4 7/8””
25”
6 3/16”
REMOVE
COVERS
Horizontal Discharge Duct Connections