40
Outlet (Manifold) Pressure Screw
Inlet Pressure Screw
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 17.1
and 17.2 for proper testing procedures. For manifold pressures, refer to 2.3, Gas Information, on page 5.
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 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 than 1/2 psi (3.5 kPa).
NOTE
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.
CAUTION
A LOW PRESSURE READING CAN CAUSE DELAYED IGNITION.
NOTE: Make sure to apply the incoming pressure test with all other gas appliances on, or at full capacity in the house
for proper pressure reading.
1. Loosen inlet (IN) pressure tap screw (counter-clockwise).
2. Attach manometer using a 1/4 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 inlet (IN) pressure tap screw (clockwise). Screw should be snug. Do not over tighten.
6. Relight pilot and burner. Then reattach manometer to the inlet pressure tap to verify the tap is completely sealed. Manometer should read
no pressure.
1. Light pilot.
2. Loosen manifold (OUT) pressure tap screw (counter-clockwise).
3. Attach manometer to pressure tap using a 1/4-in I.D. hose.
4. Light burner. Check manometer reading.
5. Turn burner and pilot off.
6. Disconnect manometer hose and tighten manifold (OUT) pressure tap screw (clockwise). Screw should be snug. Do not over tighten.
7. Attach the manometer to the manifold pressure tap to verify it is completely sealed. The manometer should read no pressure when pilot
and burner are on.
17.0
PRESSURE TESTING
17.1
Inlet Pressure Test
17.2
Manifold Pressure Test
Figure 17.1, Test Pressure Locations
