32
fitting 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. Turn OFF gas to furnace at the manual gas shutoff
valve external to the furnace.
2. Connect a calibrated manometer (or appropriate gas
pressure gauge) at either the gas valve inlet pressure
tap or the gas piping drip leg. See White-Rodgers
36J54 gas valve figure for location of inlet pressure
tap.
NOTE: If measuring gas pressure at the drip leg, a
field-supplied hose barb fitting must be installed
prior to making the hose connection. If using the
inlet pressure tap on the White-Rodgers 36J54 gas
valve, then use the 36G/J Valve Pressure Check 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.
Measure furnace gas supply pressure with burners
firing. Supply pressure must be within the range
specified in the
Inlet Gas Supply Pressure
table.
If supply pressure differs from table, make the necessary
adjustments to pressure regulator, gas piping size, etc.,
and/or consult with local gas utility.
5. Turn OFF gas to furnace at the manual shutoff valve
and disconnect manometer. Reinstall plug before
turning on gas to furnace.
6. Turn OFF any unnecessary gas appliances stated in
step 3.
Gas Manifold Pressure Measurement and
Adjustment
CAUTION
To prevent unreliable operation or equipment damage,
the gas manifold pressure must be as specified on the unit
rating plate. Only minor adjustments should be made by
adjusting the gas valve pressure regulator.
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. 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. 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 the outlet pressure
tap (White-Rodgers valve).
5. Turn ON the gas supply.
6. Turn on power and close thermostat “R” and “W1”
contacts to provide a call for low stage heat.
7. Measure the gas manifold pressure with burners
firing. Adjust manifold pressure using the
Manifold
Gas Pressure
table shown below.
Range
Nominal
Natural
Low Stage 1.6 - 2.2" w .c.
1.9" w .c.
High Stage 3.2 - 3.8" w .c.
3.5" w .c.
Propane
Low Stage 5.7 - 6.3" w .c.
6.0" w .c.
High Stage 9.7 - 10.3" w .c. 10.0" w .c.
Manifold Gas Pressure
Gas
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. Replace regulator cover screw.
9. Close thermostat “R”, “W1” and “W2” contacts to
provide a call for high stage heat.
10. Remove regulator cover screw from the high (HI)
outlet pressure regulator adjust tower and turn screw
clockwise to increase pressure or counterclockwise to
decrease pressure. Replace regulator cover screw.
11. Turn off all electrical power and gas supply to the
system.
12. Remove the manometer hose from the hose barb
fitting or outlet pressure tap.
13. Replace outlet pressure tap: White-Rodgers 36J54
valve: Turn outlet pressure test screw in to seal
pressure port (clockwise, 7 in-lb minimum).
14. Turn on electrical power and gas supply to the
system.
15. Close thermostat contacts “R” and “W1/W2” to
energize the valve.
Using a leak detection solution or soap suds, check for
leaks at outlet pressure tap plug (Honeywell valve) or
screw (White-Rodgers valve). Bubbles forming indicate
a leak. SHUT OFF GAS AND REPAIR ALL LEAKS
IMMEDIATELY!
16.
NOTE:
For gas to gas conversion, consult your
dealer for appropriate conversion.
INLET
OUTLET
Gas Valve On/Off
Selector Switch
White-Rodgers Model 36J54 (Two-Stage)
