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INSTALLATION AND CHECKING OF GAS LINE
Gas Supply piping must be sized in accordance with the
recommendations contained in "American National Stan-
dard Institute Installation of Gas Piping" ANSI 223.1 unless
local codes or regulations state otherwise.
Materials used and pipe sizing for U.S. mobile homes must
comply with requirements contained in Mobile Homes
A119.1, Recreational Vehicles A119.2 and H.U.D. Title 24,
Section 280.705 and any local or state codes.
The gas line inlet on the gas valve is
line may be installed through the furnace floor or furnace
side to the gas valve.
CAUTION
To install gas line and to connect it to the gas valve, care
must be taken to hold gas valve firmly to prevent mis-
alignment of the burner orifice, or to damage gas valve
which could result in improper heating, explosion, fire
or asphyxiation.
DO NOT USE EXCESSIVE PIPE SEALANT ON PIPE
JOINTS. Pipe sealant, metal chips or other foreign ma-
terial that could be deposited in the inlet of the gas
valve, when gas pipe is installed or carried through the
gas piping into the gas valve inlet after installation, may
cause the gas valve to malfunction and could result in
possible improper heating, explosion, fire or asphyxi-
ation. Also, pipe sealant must be resistant to Propane
gas.
Where regulations require, a main shut-- off valve shall
be installed externally of furnace casing. After piping
has been installed, turn gas on and check all connec-
tions with a leak detector or soap solution.
NEVER USE OPEN FLAME. FIRE OR EXPLOSION
COULD OCCUR.
Do not test the fuel system at more than 14" W.C. after
furnace has been connected to fuel line. Such testing
could void the warranty. Any test run above 14" W.C.
may damage furnace control valve which could cause
an explosion, fire or asphyxiation.
A dirt leg may be required by some local codes to trap mois-
ture and contaminations.
For NAT. gas operation, the furnace is designed for 7" W.C.
inlet gas pressure. Pressure to main burner is then reduced
1
to 3
/
" W.C.
2
For Propane gas operation, the furnace is designed for 11"
W.C. inlet gas pressure. Pressure to main burner is then
reduced to 10" W.C.
NOTE
1
/
---14 N.P .T. The gas
2
GAS PIPING
When converting valve from or to Propane gas, it will be
necessary to change main burner orifice to prevent an un-
derfired or overfired condition. See furnace nameplate for
complete instructions.
If the gas input to the furnace is too great because
of excessive gas pressure, wrong size orifice, high
altitude, etc., the burner flame will be sooty and
may produce carbon monoxide, which could result
in unsafe operation, explosion, and/or fire or as-
phyxiation.
Observing Burner Operation
1. Observe burner to make sure it ignites. Observe color
of flame. On natural gas the flame will burn blue with
appreciably yellow tips. On Propane gas a yellow flame
may be expected. If flame is not the proper color call a
qualified serviceman for service.
2. Let furnace heat until blower cycles on.
3. Turn thermostat down.
4. Observe burner to make sure it shuts off.
5. Let the furnace cool and blower cycle off.
Should overheating occur, or the gas supply fail to
shut off, shut off the manual gas valve to the fur-
nace and allow burner to run until furnace cools
down and blower shuts off before shutting off the
electrical supply.
If any abnormalities are observed when checking for cor-
rect operation, such as burner failing to ignite or to turn off,
sooty flame, etc., call your nearest authorized service tech-
nician as shown in the Service Center List included in the
home owner envelope with the furnace.
Combustion Air
In order for the burner flame to burn efficiently, it must re-
ceive adequate combustion air.
The amount of combustion air can be changed by operat-
ing the combustion air adjustment rod located beneath the
gas valve. (See Figures 19 and 20.)
The adjustment rod is set at an "average" position at the
factory and may be properly set for many applications.
23
IMPORTANT
CAUTION
WARNING
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