Checking The Inlet Gas Pressure - Napoleon 9600 SERIES Installation And Operating Instructions Manual

10. Remove the plastic high fi re regulator adjustment screw (beneath the cover screw).
11. Remove the high fi re natural gas regulator spring only, (colour-coded silver/plain) from regulator sleeves.
12. Insert the LP regulator spring (provided in the conversion kit and colour-coded white) into the regulator
sleeve.
13. Replace the high regulator adjustment screw and adjust approximately 12 turns to the bottom.
14. Apply a liberal amount of pipe joint compound or pipe thread tape to the threads and reassemble the
piping previously removed. Note: the pipe joint compound must be resistant to LP gas.

13.2 CHECKING THE INLET GAS PRESSURE

WHITE-RODGERS 36G54 TWO STAGE GAS VALVE
1. Turn off the gas and electrical supply.
2. Back inlet pressure test screw (inlet pressure boss,
see FIGURE 31) counterclockwise out one turn
maximum, with a 3/32" Allen wrench. Attach a hose
and calibrated U-tube or digital manometer to the
inlet pressure boss. Hose should overlap boss 3/8".
The manometer must have a scale range of at least
0" to 15" of water column.
3. Turn ON the gas and electrical supply and operate
the furnace and all other gas consuming appliances
on the same gas supply line. Using a soap and
water solution, check for leaks around the gas valve/
manifold connection and the burner orifi ces. Repair
any leaks before continuing.
4. Measure furnace gas inlet pressure with burners
fi ring. Inlet pressure must be within the range specifi ed on the furnace rating plate. 5-7" w.c. (Natural Gas)
or 11-13" w.c. (LP).
If the inlet pressure differs from the rating plate, make the necessary adjustments to pressure regulator,
gas piping size, etc. and/or consult with local gas utility.
5. Turn off gas and electrical supply to furnace, remove the
manometer hose from the inlet pressure tap boss, and
tighten the inlet pressure tap screw using the 3/32" Allen
wrench. (Clockwise, 7 in-lb minimum).
6. Turn on the gas supply and electrical power to the furnace.
7. Using a leak detection solution or soap suds, check for
leaks at pressure boss screw. Bubbles forming indicate a
leak. SHUT OFF GAS AND FIX ALL LEAKS IMMEDIATELY!
8. Turn gas back on and test inlet pressure boss with leak
detector.
9. If working on a natural gas system, contact the gas utility.
They may insist on any service regulator adjustments being
made by their own staff
If problems were encountered with obtaining enough pressure
on the manifold, fi rst examine the gas piping system to ensure
that it is correctly sized. Pipe sizing is specifi ed in CAN/CSA-B-149.1 & 2, and in NFPA 54 / ANSI Z223.1. Be
sure to check for restrictions, partially closed valves, etc.
FIGURE 31 - WHITE RODGERS 36G54 GAS VALVE
FIGURE 32 - VALVE PRESSURE CHECK KIT
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W415-0919 / 10.12.10