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RIGGING DETAILS
Refer to the Unit Installation Instructions for proper unit
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.
GAS PIPING
IMPORTANT NOTE:
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 the fac-
tory authorized conversion kit LPM-08.
INLET GAS PRESSURE
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 Must Not Exceed the Maximum Value Shown in Table Above.
The minimum supply pressure should not vary from that shown in the table above because this could prevent the unit from having
dependable ignition. In addition, gas input to the burners must not exceed the rated input shown on the rating plate. Over firing
of the unit could result in premature heat exchanger failure.
H
A
D
(U.S. I
IGH
LTITUDE
ERATE
IMPORTANT NOTE: Installation of this gas/electric package unit at altitudes above 2000 ft (610 m) shall be made in accordance with
the Listed High Altitude Conversion Kit.
L'installation de ce générateur de chaleur à des altitudes supérieures à 2000 pi (610 m) doit être effectuée conformément aux
instructions accompagnant la trousse de conversion pour haute altitude fournie avec cet appareil.
The gas/electric units naturally derate with altitude. Do not attempt to increase the firing rate by changing orifices or increasing
the manifold pressure. This can cause poor combustion and equipment failure. At all altitudes, the manifold pressure must be
within 0.3 inches W.C. of that listed on the nameplate for the fuel used. At all altitudes and with either fuel, the air temperature rise
must be within the range listed on the unit nameplate.
Refer to the Installation Manual provided with the LP kit for conversion from natural gas to propane gas and for altitude adjustments.
Use HA02 for installations above 2000'.
NOTE: Up to 2,000 feet, no changes are required; above 2,000 feet, refer to the gas/electric package unit specification sheets for
required kit(s).
P
IPING
IMPORTANT NOTE:
To avoid possible unsatisfactory operation or equipment damage due to under firing of equipment, do not
undersize the natural/propane gas piping from the meter/tank to the unit. When sizing a trunk line, include all appliances on that
line that could be operated simultaneously.
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. The gas line installation must comply with local codes, or in the absence of local codes, with the latest
edition of the National Fuel Gas Code NFPA 54/ANSI Z223.1.
O
)
NSTALLATIONS
NLY
8
Rigging
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