12
PRESSURE TESTING
INLET PRESSURE TEST:
Outlet (Manifold) Pressure Screw
Inlet Pressure Screw
Figure 12a
IMPORTANT
Pressure check taps for manifold (outgoing) and inlet (incoming) pressure have been incorporated into the valve. The pressure
tap marked OUT measures outgoing pressure and the pressure tap marked IN measures incoming pressure. Follow instructions
below for proper testing procedures. Refer to page 16
for proper NAT and LP manifold pressures.
NOTE
The appliance and its appliance main gas valve must be disconnected from the gas supply piping system during any pressure
testing of that system at test pressures in excess of 1/2 psi (3.5 kPa). The appliance must be isolated from the gas supply piping
system by closing its equipment shutoff valve during any pressure testing of the gas supply piping system at test pressures equal
to or less that 1/2 psi (3.5 kPa).
NOTE
If inlet pressure reading is too high or too low, contact the gas company. Only a qualified gas service technician should adjust
incoming gas pressure.
CAUTION
A LOW PRESSURE READING CAN CAUSE DELAYED IGNITION.
1.
Loosen inlet (IN) pressure tap screw (counter-clockwise).
2.
Attach manometer using a 5/16” I.D. hose.
3.
Set IPI/CPI switch to CPI setting.
4.
Light pilot. Note manometer reading.
5.
Move receiver slider switch to ON. Burner should light. Check pressure to ensure it stays between the min. and max. recommended
pressure settings.
6.
Set IPI/CPI switch to IPI setting . Move receiver slider switch to OFF. Pilot and burner should go out.
7.
Disconnect hose and tighten screw (clockwise). Screw should be snug, do not over tighten.
8. Relight pilot. Reattach manometer to inlet pressure tap to verify that it is completely sealed. Manometer should read no pressure.
MANIFOLD PRESSURE TEST:
1. Light
pilot.
2.
Loosen manifold (OUT) pressure tap screw (counter-clockwise).
3.
Attach manometer to pressure tap using a 5/16” I.D. hose.
4.
Set IPI/CPI switch to CPI setting.
5.
Move receiver slider switch to ON. Burner should light. Note manometer reading.
6.
Set IPI/CPI switch to IPI setting. Move receiver slider switch to OFF.
7.
Disconnect manometer hose and tighten screw (clockwise). Screw should be snug, do not over tighten.
8. Attach manometer to manifold pressure tap to verify it is completely sealed. Manometer should read no pressure when receiver slider
switch is moved to ON.
