Setting The Manifold Gas Pressure - Napoleon WPV-N Série Instructions D'installation Et D'opération

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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.
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7. Using a leak detection solution, 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, 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.
In some circumstances, high inlet pressure can be remedied with the use of an in line appliance regulator. If
an in line appliance regulator is used, ensure that it has the capacity to adequately handle the gas volume
required by the furnace and any other appliances receiving gas from the header serving the furnace.
FIGURE 28 - WHITE RODGERS 36G54 GAS VALVE
13.5

SETTING THE MANIFOLD GAS PRESSURE

When the installation is completed to the "Start-up & Setup" stage, test the gas manifold pressure by following
these steps:
WHITE-RODGERS 36G54 TWO STAGE GAS VALVE
1. Turn off the gas and electrical supply before proceeding.
2. Back outlet pressure test screw (outlet pressure boss, see Fig.31) counterclockwise out one turn
maximum, with a 3/32" Allen wrench. Attach a hose and calibrated U-tube or digital manometer to the
outlet 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 supply and electrical power to the furnace and energize main solenoid by connecting R to
W1 on the integrated control board. Do not energize the HI solenoid.
4. Remove regulator adjustment cover screw from the low outlet pressure regulator adjust tower (Fig.31) and
turn the plastic regulator adjustment screw clockwise to increase manifold pressure or counterclockwise
to reduce manifold pressure. Always adjust regulator according to original equipment manufacturer's
specifi cations listed on the appliance rating plate. Replace regulator cover screw.
W415-2308 / B / 11.04.19
H18.4.2
FIGURE 29 - VALVE PRESSURE CHECK KIT