ADJUSTMENT
41
12.0 ADJUSTMENT
12.1 Pressure Testing
NOTE: The appliance and its appliance main gas valve must
be disconnected from the gas supply piping system during any
pressure testing of the system at test pressures in excess of ½
psi (3.5 kPa).
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.
The pressure tap marked IN measures incoming pressure.
12.1.1 Inlet Pressure Test
NOTE: Make sure to apply these incoming pressure test with
all other gas appliances on, or at full capacity in the house for
proper pressure reading.
IMPORTANT: If the inlet pressure reading is too high or too
low, contact the gas company. Only a qualified gas service
technician should adjust incoming gas pressure.
1. Loosen the inlet (IN) pressure tap by turning screw counter-
clockwise. See (A) in Figure 12.1.
2. Attach manometer using a ¼ in (6 mm) I.D. hose.
3. Light pilot and burner. Check pressure to ensure it is
between the minimum and maximum recommended pressure
settings.
4. Turn off burner and pilot.
5. Disconnect hose and tighten the inlet (IN) pressure tap by
turning screw clockwise. Screw should be snug. Do not over
tighten.
6. Relight pilot and burner. Then reattach manometer to the
inlet pressure tap (A) to verify the tap is completely sealed.
Manometer should read no pressure.
12.1.2 Manifold Pressure Test
1. Light pilot.
2. Loosen manifold (OUT) pressure tap by turning screw
counter-clockwise. See (B) in Figure 12.1.
3. Attach manometer to pressure tap using a ¼ in (6 mm) I.D.
hose.
4. Light burner. Check manometer reading.
5. Turn burner and pilot off.
6. Disconnect manometer hose and tighten the manifold (OUT)
pressure tap by turning screw clockwise. Screw should be
snug. Do not over tighten.
7. Attach the manometer to the manifold pressure tap (B) to
verify it is completely sealed. The manometer should read no
pressure when pilot and burner are on.
Table 12.1, Inlet Pressures
Fuel
Natural Gas
LP Gas
Gas Supply
Min - Max
Min - Max
Inlet Pressure
Tap (A)
5” - 10.5” WC
(1.25 - 2.62 kPa)
12” - 13” WC
(2.99 - 3.24 kPa)
Table 12.2, Manifold Pressure
Fuel
Natural Gas
LP Gas
Gas Supply
Low - High
Low - High
Manifold Pressure
Tap (B)
1.1” - 3.8” WC
(.27 - .95 kPa)
2.9” - 11” WC
(.72 - 2.74 kPa)
A
B
Figure 12.1, Pressure Check Taps
