8
Propane Gas and/or High Altitude Installations
WARNING
Possible property damage, personal injury or death may
occur if the correct conversion kits are not installed. The
appropriate kits must be applied tot ensure safe and proper
furnace operation. All conversions must be performed by a
qualified installer or service agency.
This furnace is shipped from the factory configured for nat
-
ural gas at standard altitude. Propane gas installations re-
quire an orifice change to compensate for the energy con
-
tent difference between natural and propane gas.
High altitude installations may require both a pressure
switch and an orifice 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
Specification 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 qualified installer, or service agency.
Inlet gas supply pressures must be maintained within the
ranges specified below. The supply pressure must be con
-
stant and available with all other household gas fired appli
-
ances operating. The minimum gas supply pressure must
be maintained to prevent unreliable ignition. The maximum
must not be exceeded to prevent unit overfiring.
WARNING
Failure to follow instructions can result in bodily injury or
death. Carefully read and follow all instructions given in
this section.
WARNING
Upon completion of the furnace installation, carefully
inspect the entire flue system both inside and outside the
furnace to assure it is properly sealed. Leaks in the flue
system can result in serious personal injury or death due to
exposure to flue products, including carbon monoxide.
CAUTION
To prevent unreliable operation or equipment damage, the
inlet gas supply pressure must be as specified on the unit
rating plate with all other household gas fired appliances
operating.
Inlet gas supply pressures must be maintained within the
ranges specified below. The supply pressure must be con
-
stant and available with all other household gas fired appli
-
ances operating. The minimum gas supply pressure must
be maintained to prevent unreliable ignition. The maximum
must not be exceeded to prevent unit overfiring.
Natural Gas
Minimum: 4.5" w.c.
Maximum: 10.0" w.c.
Propane Gas
Minimum: 11.0" w.c. Maximum: 13.0" w.c.
INLET GAS SUPPLY PRESSURE
Gas Valve
This unit is equipped with a 24 volt gas valve controlled
during furnace operation by the integrated control module.
As shipped, the valve is configured for natural gas. The
valve is field 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.
NOTE: The gas supply pressure on White-Rodger
“J” model gas valve, used on single stage furnaces,
can be checked with a gas pressure test kit (Part
#0151K00000S) available through our authorized
distributors.
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.
Gas Piping Checks
Before placing unit in operation and after servicing, leak
test the unit and gas connections.
WARNING
To avoid possibility of explosion or fire, never use a match or
open flame to test for leaks.
Check for leaks using an approved chloride-free soap and
water solution, an electronic combustible gas detector, or
other approved testing methods.
NOTE: Never exceed specified pressures for testing.
Higher pressure may damage the gas valve and cause
subsequent overfiring, resulting in heat exchang
-
er failure. Disconnect this unit and shutoff valve
from the gas supply piping system before pressure
testing the supply piping system with pressures in
excess of 1/2 psig (3.48 kPa). Isolate this unit from
the gas supply piping system by closing its external
manual gas shutoff valve before pressure testing
supply piping system with test pressures equal to
or less than 1/2 psig (3.48 kPa).
Electrical
24 Volt Thermostat Wiring
Important Note: Wiring routing must not interfere
with circulator blower operation, filter removal
or routine maintenance.
