GM9S80 Installation Manual
20
Natural Gas Minimum: 4.5" w.c. Maximum: 10.0" w.c.
Propane Gas Minimum: 11.0" w.c. Maximum: 13.0" w.c.
The line pressure supplied to the gas valve must be within
-
installed in the gas piping drip leg. The supply pressure must
be measured with the burners operating. To measure the
gas supply pressure, use the following procedure.
1.
external to the furnace.
2.
pressure gauge) at either the gas valve inlet pressure
tap or the gas piping drip leg. See White-Rodgers 36J54
If using the inlet pressure tap on the White-Rodgers
Kit, Part No. 0151K00000S.
3. Turn ON the gas supply and operate the furnace and
all other gas consuming appliances on the same gas
supply line.
4.
the Inlet Gas Supply Pressure table.
adjustments to pressure regulator, gas piping size, etc., and/
or consult with local gas utility.
5.
disconnect manometer. Reinstall plug before turning on
gas to furnace.
6.
step three.
Only small variations in gas pressure should be made by
adjusting the gas valve pressure regulator. The manifold
pressure must be measured with the burners operating. To
measure and adjust the manifold pressure, use the following
procedure.
1.
external to the furnace.
2.
3. Outlet pressure tap connections:
White-Rodgers 36J54 valve: Back outlet pressure
test screw (inlet/outlet pressure tap) out one turn
(counterclockwise, not more than one turn).
4. Attach a hose and manometer to outlet pressure tap.
5. Turn ON the gas supply.
.
When converting from natural gas to L.P. consult
your distributor for proper conversion kit.
Range Nominal
High Stage 3.2 - 3.8" w.c. 3.5" w.c.
High Stage 9.7 - 10.3" w.c. 10.0" w.c.
Manifold Gas Pressure
Gas
Natural
Propane