Manifold & Incoming Pressure Check Procedures - kozy heat TMT-3875 Installation And Operating Manual

MODEL #TMT-3875: PRESSURE TEST - MANIFOLD & INLET PRESSURE
IMPORTANT NOTICE: A pressure check tap for both the manifold (outgoing) and inlet (incoming) pressure has been
incorporated into the valve by S.I.T. Controls. The left pressure tap is the manifold pressure and the right 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. Push the control knob [A] on the gas valve in slightly and turn to the 'ON' position.
5. Turn the burner 'ON' by pressing the rocker switch [C] to the 'ON' position and note manometer reading.
6. Press 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 tap to verify that it is completely sealed.
Manometer should read no pressure when the rocker switch is pressed to the 'ON' position.
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.
TO CHECK THE INLET PRESSURE:
1. Loosen Inlet pressure tap screw [E] by turning screw counter-clockwise.
2. Attach manometer using a 5/16" I.D. hose [F].
3. Light the pilot.
4. Push the control knob on the gas valve (A) in slightly and turn to the 'ON' position. (Burner should not come 'ON') and note
manometer reading.
5. Turn the rocker switch [C] to the 'ON' position by pressing the switch to the 'ON' position and check the pressure to ensure
that it stays near the maximum inlet pressure.
6. Press the rocker switch [C] to the 'OFF' position.
7. Turn the pilot to the 'OFF' position.
8. Disconnect hose and tighten screw (clockwise). Screw should be snug, do not over tighten.
9. Relight pilot. Push the control knob [A] in slightly and turn to the 'ON' position. Attach manometer to the inlet pressure tap to
verify that it is completely sealed. Manometer should read no pressure.
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.
CAUTION: A LOW PRESSURE READING
CAN CAUSE DELAYED IGNITION.
Figure 22
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