Manifold (Outgoing) & Inlet (Incoming) Pressure Check Procedures - kozy heat 911-XXL Installation & Operating Manual

IMPORTANT NOTICE: A pressure check tap for both the manifold (outgoing) and inlet (incoming) pressure
has been incorporated into the valve by Honeywell. The right pressure tap is the manifold pressure and the
left pressure tap measures the incoming pressure. Follow the instructions below for proper pressure
testing procedures.
TO CHECK THE MANIFOLD PRESSURE:
1. Light pilot .
2. Loosen the manifold pressure tap [D] by
turning the screw counter-clockwise.
3. Attach manometer to pressure tap using a
5/16" I.D. hose [F].
4. Turn control knob [A] to the 'ON' position.
5. Turn the burner 'ON' by depressing the rocker
switch [C] and note the manometer reading.
6. Depress the rocker switch [C] to the 'OFF'
position.
7. Disconnect manometer hose and tighten
screw (clockwise). Screw should be snug, do
not over tighten.
8. Attach manometer to manifold pressure to
verify that it is completely sealed. Manometer
should read no pressure when the rocker is
turned 'ON'.
NOTE: If manifold pressure reading is within the
normal range, an incoming pressure check is not
necessary. A too high or too low pressure
reading warrants an inlet (incoming) gas pressure
check.
CAUTION: A LOW PRESSURE READING CAN CAUSE DELAYED IGNITION.
FIGURE L-2
PRESSURE TESTING
MANIFOLD & INLET PRESSURE
TO CHECK THE INLET PRESSURE:
1. Loosen Inlet pressure tap screw [E] by turning
2. Attach manometer using a 5/16" I.D. hose [F].
3. Light the pilot.
4. Turn the control knob [A] to the 'ON' position
5. Depress the rocker switch [C] to the 'ON'
6. Depress the rocker switch [C] to the 'OFF'
7. Turn the pilot to the 'OFF' position.
8
9. Relight pilot and turn the control knob [A] to
NOTE: If Inlet pressure reading is too high or too
low, contact the gas company. Only a qualified
gas service technician should adjust the incoming
gas pressure.
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screw counter-clockwise
and note manometer reading. (Burner should
not turn 'ON'.)
position and check the pressure to ensure
that it stays near the maximum inlet pressure.
position.
Disconnect hose
(clockwise). Screw should be snug, do not
over tighten.
the 'ON' position. Attach manometer to the
inlet pressure tap to verify that it is completely
sealed. Manometer should read no pressure.
and tighten screw