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11. Turn on the electrical power supply to the unit.
12. Set the thermostat to desired setting.
Gas Supply And Manifold Check
Gas supply pressure and manifold pressure with the burners
operating must be as specified on the rating plate.
Gas Inlet Pressure Check
Gas inlet pressure must be checked and adjusted in accordance
to the type of fuel being consumed.
With Power And Gas Off:
1. Back inlet pressure test screw (inlet pressure boss) out
one turn (counterclockwise, not more than one turn).
Alternately, inlet gas pressure may be measured by
removing the cap from the drip leg and installing a predrilled
cap with a hose barb fitting.
2. Connect a water manometer or adequate gauge to the
inlet pressure tap of the gas valve (or hose barb fitting on
predrilled cap).
With Power And Gas On:
3. Put unit into heating cycle and turn on all other gas consuming appliances.
INLET GAS PRESSURE
Natural
Min. 5.0" W.C., Max. 10.0" W.C.
Propane
Min. 11.0" W.C., Max. 13.0" W.C.
NOTE: Inlet Gas Pressure Must Not Exceed the Maximum Value Shown. If operating
pressures differ from above, make necessary pressure regulator adjustments, check
piping size, etc., and/or consult with local utility.
4. Turn off all electrical power and gas supply to the system.
5. Remove manometer hose from the outlet pressure boss (or remove hose from
hose barb).
6. Turn inlet pressure test screw in to seal pressure port (clockwise, 7 in-lb minimum).
Alternately, remove predrilled cap from drip leg. Reinstall original cap, sealing
with pipe thread compound.
7. Turn on electrical power and gas supply to the system.
8. Turn on system power and energize valve.
9. Using a leak detection solution or soap suds, check for leaks at the pressure
boss screw (or drip leg cap). Bubbles forming indicate a leak. SHUT OFF GAS AND
FIX ALL LEAKS IMMEDIATELY.
Manifold Pressure Check
1 Turn OFF gas to furnace at the manual gas shutoff valve external to the furnace.
2. Turn off all electrical power to the system.
3. Back outlet pressure test screw (outlet pressure boss) out one turn
(counterclockwise, not more than one turn).
4. Attach a hose and manometer to the outlet pressure boss of the valve.
5. Turn ON the gas supply.
6. Turn on power and energize main (M) solenoid. Do not energize the HI
solenoid.
7. Measure gas manifold pressure with burners firing. Adjust manifold
pressure using the Manifold Gas Pressure table.
8. Remove regulator cover screw from the low (LO) outlet pressure
regulator adjust tower and turn screw clockwise to increase pressure,
or counterclockwise to decrease pressure.
9. Energize main (M) solenoid as well as the HI terminal.
10. Remove regulator cover screw from the HI outlet pressure regulator
adjust tower and turn screw clockwise to increase pressure, or
counterclockwise to decrease pressure.
Open to
Atmosphere
Outlet
Pressure Boss
Inlet
Pressure Boss
On/Off Switch
White-Rodgers Model 36G54 connected to Manometer
Gas
Shutoff
Valve
Drip Leg Cap
With Fitting
Gas
Natural
Propane
14
High Fire Regulator
Adjust
High Fire
Coaxial Coil
Coil Terminal (HI)
Terminal (M)
Common
Terminal (C)
Gas Line
Gas Line
To Furnace
Open To
Atmosphere
Manometer Hose
Manometer
Measuring Inlet Gas Pressure
Alternate Method
Manifold Gas Pressure
Range
Low Sta ge
1.7 - 2.3" w.c.
Hi gh Sta ge
3.2 - 3.8" w.c.
Low Sta ge
5.7 - 6.3" w.c.
Hi gh Sta ge
9.7 - 10.3" w.c.
Manifold Gas Pressure
Regulator
Vent
Low Fire
Regulator Adjust
Nominal
2.0" w.c.
3.5" w.c.
6.0" w.c.
10.0" w.c.
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