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PRESSURE SWITCH SENSING TUBE INSTALLATION
1. Attach the 1/4 inch tubing connector to the pressure tube on the SWG Venter. (See Figure 3)
2. Connect the supplied 1/4" aluminum tubing to the tubing connector. Route the tubing to the CK-81 junction box and
connect the tubing to the pressure switch. When routing the tubing, avoid kinking the tubing by bending the tubing too
sharply.
NOTE: For remote mounted CK-81 Junction Box, use 1/4" OD copper, aluminum or plastic tubing, and route the tubing to
avoid contact with any heat source.
Refer to the SWG Venter installation instructions for setting system airflow.
PRESSURE SWITCH ADJUSTMENTS
With the venter airflow set and the appliance operating
at the best operating efficiency adjust the pressure
switch by rotating the adjustment screw clockwise until
the burner shuts off, then rotate the adjustment screw
counterclockwise until the burner fires. Rotate the
adjustment
screw
counterclockwise to ensure proper switch setting. (See
Figure 5)
SYSTEM CONTROL CHECK OUT PROCEDURES
1. Adjust the thermostat to call for heat and observe
the power venting system for proper operating
sequence. (Repeat if necessary).
a. Thermostat or wall switch calls for heat.
b. Venter motor starts.
c. Pressure switch closes and burner starts.
d. Thermostat is satisfied or wall switch is turned off. The burner stops; the venter runs for 1-3 minutes longer.
2. While system is operating disconnect power to the venter motor. This should open the pressure switch contacts and
stop burner operation.
TROUBLE SHOOTING HINTS
1. Main burner does not fire when thermostat or wall switch calls for heat with venter operating.
a. Check pressure switch adjustment.
b. Check wiring connections between pressure switch and burner.
c. Check pressure switch for continuity across terminals, during venter operation.
2. Venter does not activate when thermostat or wall switch calls for heat.
a. Check wiring.
3. Flue gas odor.
a. Check system draft.
b. Check for negative pressure in building.
MAINTENANCE
1. Motor: Inspect motor once a year, the motor should rotate freely.
2. Wheel: Inspect venter wheel annually to clear any soot, ash or coating which inhibits either rotation or air flow.
Remove all foreign material before operating.
3. Vent System: Inspect all vent pipe connections annually for looseness and for evidence of flue gas leakage. Seal or
tighten pipe connections if necessary.
an
additional
1/4
turn
Page 3
Figure 5
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