Setting The Manifold Gas Pressure - Napoleon 9600 SERIES Installation And Operating Instructions Manual

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13.3 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 fi g.31) counterclockwise out one more 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 cover screw from the low outlet pressure regulator adjust tower (fi g.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.
5. Energize main solenoid as well as the HI terminal by connecting R/W1 and W1/W2 on the integrated
furnace control. Remove regulator cover screw from the high outlet pressure regulator adjust tower
(fi g.31) and turn the plastic regulator adjustment screw clockwise to increase manifold pressure or
FIGURE 33 - MANOMETER MEASURING GAS
MANIFOLD PRESSURE
ALL REGULATOR ADJUSTMENTS MUST BE DONE BY A TRAINED, QUALIFIED
TECHNICIAN. IMPROPER MODIFICATIONS OR ADJUSTMENTS CAN RESULT IN FIRE OR
EXPLOSION CAUSING PROPERTY DAMAGE, SEVERE PERSONAL INJURY OR LOSS OF
8. Turn on the gas supply and electrical power to the furnace.
9. Turn on system power and energize valve.
10. 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!
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.
W415-0919 / 10.12.10
counterclockwise to reduce manifold pressure. Manifold
pressure should be set to 1.4" w.c low fi re, 3.5" w.c high
fi re for natural gas, 4.0" w.c low fi re, 10" w.c. high fi re
for LP gas. Always adjust regulator according to original
equipment manufacturer's specifi cations listed on the
appliance rating plate.
When the correct pressure has been established, securely
replace the regulator cover screw.
6. Turn off the gas and electrical supply to the furnace.
7. Remove the manometer hose from the outlet pressure tap
boss, and tighten the outlet pressure tap screw using the
3/32" Allen wrench. (Clockwise, 7 in-lb minimum).
WARNING
!
LIFE.
!