kozy heat SP-34-LE Installation And Operation Manual page 38

11.1.2 Millivolt Gas Pressure Testing
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.
11.1.2.1 Inlet Pressure Test
NOTE: Make sure to apply the incoming pressure test with all
other gas appliances on, or at full capacity in the house for a
proper pressure reading. 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. A low
pressure can cause a delayed ignition.
1. Loosen the inlet (IN) pressure tap by turning screw
counterclockwise. See (A) in Figure 11.2.
2. Attach manometer using a ¼ in (6 mm) I.D. hose.
3. Light pilot.
4. Turn the gas control knob to ON. Burner should not light.
Note manometer reading.
5. Press the ON/OFF rocker switch to ON. Check pressure to
ensure it is near maximum inlet pressure.
6. Press the ON/OFF rocker switch to OFF.
7. Turn the gas control knob to OFF.
8. Disconnect hose and tighten the inlet (IN) pressure tap by
turning screw clockwise. Screw should be snug. Do not over
tighten.
9. Relight pilot and turn the gas control knob to ON. Reattach
manometer to the inlet pressure tap (A) to verify the tap is
completely sealed. Manometer should read no pressure.
11.1.2.2 Manifold Pressure Test
1. Light pilot.
2. Loosen manifold (OUT) pressure tap by turning screw
counterclockwise. See (B) in Figure 11.2.
3. Attach manometer to pressure tap using a ¼ in (6 mm) I.D.
hose.
4. Turn gas control knob to ON.
5. Press the rocker switch to ON and note manometer reading.
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 the ON/OFF rocker switch is pressed to ON.
38 ADJUSTMENT
Table 11.2, Pressure Requirements - OAK-18-MV (Millivolt)
Gas Pressure Natural Gas
Inlet Pressure
Tap (A)
(1.25 - 2.62 kPa)
Manifold Pressure
Tap (B)
(0.41 - 0.87 kPa)
A
B
Figure 11.2, Pressure Check Taps Locations (Millivolt Gas Valve)
LP Gas
5" - 10.5" WC 11" - 13" WC
(2.74 - 3.24 kPa)
1.6" - 3.5" WC 6.4" - 10" WC
(1.59 - 2.48 kPa)