8
This furnace is shipped from the factory congured for nat-
ural gas at standard altitude. Propane gas installations re-
quire an orice change to compensate for the energy con-
tent dierence between natural and propane gas.
High altitude installations may require both a pressure
switch and an orice change. These changes are necessary
to compensate for the natural reduction in the density of both
the gas fuel and the combustion air at higher altitude.
Refer to the Accessories Charts in this manual or product
Specication Sheet for a tabular listing of appropriate man-
ufacturer’s kits for propane gas and/or high altitude instal-
lations. The indicated kits must be used to insure safe and
proper furnace operation. All conversions must be performed
by a qualied installer, or service agency.
Inlet gas supply pressures must be maintained within the
ranges specied below. The supply pressure must be con-
stant and available with all other household gas red appli-
ances operating. The minimum gas supply pressure must
be maintained to prevent unreliable ignition. The maximum
must not be exceeded to prevent unit overring.
Inlet gas supply pressures must be maintained within the
ranges specied below. The supply pressure must be con-
stant and available with all other household gas red appli-
ances operating. The minimum gas supply pressure must
be maintained to prevent unreliable ignition. The maximum
must not be exceeded to prevent unit overring.
Natural Gas Minimum: 4.5" w.c. Maximum: 10.0" w.c.
Propane Gas Minimum: 11.0" w.c. Maximum: 13.0" w.c.
This unit is equipped with a 24 volt gas valve controlled
during furnace operation by the integrated control module.
As shipped, the valve is congured for natural gas. The
valve is eld convertible for use with propane gas by using
the appropriate propane gas conversion kit. Taps for mea-
suring the gas supply pressure and manifold pressure are
provided on the valve.
The gas valve has a manual ON/OFF control located on the
valve itself. This control may be set only to the “ON” or “OFF”
position. Refer to the Lighting Instructions Label located on
the furnace door.
Before placing unit in operation and after servicing, leak
test the unit and gas connections.
Check for leaks using an approved chloride-free soap and
water solution, an electronic combustible gas detector, or
other approved testing methods.
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