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SERVICING
The furnace as shipped requires no change to run between
0 - 5500 feet. Do not attempt to increase the ring rate by
changing orices or increasing the manifold pressure below
5500 feet. This can cause poor combustion and equipment
failure. High altitude installations above 5500 feet may re-
quire both a pressure switch and an orice change. These
changes are necessary to compensate for the natural reduc-
tion in the density of both the gas fuel and the combustion air
at higher altitude.
For installations above 5500 feet, please refer to your dis-
tributor for required kit(s). Contact the distributor for a tabu-
lar listing of appropriate manufacturer’s kits for propane gas
and/or high altitude installations. The indicated kits must be
used to insure safe and proper furnace operation. All conver-
sions must be performed by a qualied installer, or service
agency.
In some areas the gas supplier may articially derate the
gas in an eort to compensate for the eects of altitude. If
the gas is articially derated the appropriate orice size must
be determined based on the BTU/ft3 content of the derated
gas and the altitude. Refer to the National Fuel Gas Code,
NFPA 54/ANSI Z223.1, and information provided by the gas
supplier to determine the proper orice size.
Delayed ignition is a delay in lighting a combustible mixture
of gas and air which has accumulated in the combustion
chamber.
Furnace design makes this extremely unlikely unless safety
controls have been by-passed or tampered with. Never by-
pass or alter furnace controls.
If delayed ignition should occur, the following should be
checked:
1. Improper gas pressure - adjust to proper pressure
(See ).
2. Improper burner positioning - burners should be in
locating slots, level front to rear and left to right.
3. Carry over (lighter tube or cross lighter) obstructed -
clean.
4. Main burner orice(s) deformed, or out of alignment
to burner - replace.
-
The ground wire must run from the furnace all the way back
to the electrical panel. Proper grounding can be conrmed
by disconnecting the electrical power and measuring resis-
tance between the neutral (white) connection and the burner
closest to the ame sensor. Resistance should be less than
10 ohms.
The ignition control is a combination electronic and electro-
mechanical device and is not eld repairable. Complete unit
must be replaced.
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