7
•
to locating and mounting the curb and package unit.
• Ductwork must be constructed using industry guide-
lines. The duct work must be placed into the roof curb
before mounting the package unit.
• -
ing material are furnished by the contractor.
If using bottom discharge with roof
curb, ductwork should be attached to the curb prior to install-
ing the unit. Ductwork dimensions are shown in roof curb
installation instructions.
Refer to the Roof Curb Installation Instructions for proper
curb installation. Curbing must be installed in compliance
Lower unit carefully onto roof mounting curb. While rigging
unit, center of gravity will cause condenser end to be lower
than supply air end.
This unit is factory set to operate on
natural gas at the altitudes shown on the rating plate.
The rating plate is stamped with the model number, type of
gas and gas input rating. Make sure the unit is equipped to
operate on the type of gas available. Conversion to LP gas
is permitted with the use of a factory authorized conversion
for your model for a listing of approved LP gas conversion
kit for conversion from natural gas to propane gas.
The minimum supply pressure should not vary from that
shown in the Inlet Gas Pressure table because this could
prevent the unit from having dependable ignition. In addi-
tion, gas input to the burners must not exceed the rated in-
result in premature heat exchanger failure.
Natural Min. 5.0" W.C., Max. 10.0" W.C.
Propane Min. 11.0" W.C., Max. 13.0" W.C.
INLET GAS PRESSURE
Inlet Gas Pressure Must be within the Minimum and Maximum Value
Shown in Table Above.
shall be made in accordance with the Listed High Altitude
Conversion Kit available with this furnace.
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