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SYSTEM CONTROL CHECK PROCEDURES
1. Adjust the thermostat to call for heat and observe the power venting system for proper operation sequence.
Repeat as necessary.
a. Thermostat calls for heat.
b. Venter relay is energized which starts venter motor.
c. Pressure switch closes which allows burner to re.
d. Thermostat is satis ed, burner stops operation.
e. Venter continues to operate for up to 2 minutes during the post purge cycle.
2. While the system is in operation, disconnect the draft tube from the air pressure switch. The pressure switch
should open and interrupt burner operation. Re-connect the draft tube to the air pressure switch which should
allow the burner to re-light.
3. If a GSK-3 secondary safety switch is installed, allow the vent pipe to cool and disconnect the vent pipe between
the appliance outlet and venter inlet. Block the vent connected to the appliance with a non-combustible
material. Activate the heating system main burner and verify that the GSK-3 shuts down the burner within a
few minutes or less. Reset the GSK-3 and repeat.
TROUBLESHOOTING TIPS
1. Burner does not re when thermostat calls for heat.
a. Make sure draft tube is securely fastened to the air pressure switch, and is not blocked.
b. Check for continuity across pressure switch terminals when venter is operating.
c. Check wiring connections between air pressure switch and appliance.
2. Venter does not activate when thermostat calls for heat.
a. Check to see if relay closes when thermostat calls for heat.
b. Check wiring connections.
c. Check motor for unrestricted shaft rotation.
3. Exhaust gas odor.
a. Check system draft level during operation.
b. Check vent system on outlet side of venter for leakage.
c. Check for negative pressure in building.
MAINTENANCE
Motor: Inspect the motor once a year - motor should rotate freely. To prolong the life of the PVG-600 motor, it must
be lubricated with six drops of SWG Superlube, Part #46226200, annually. The PVG-100 and PVG-300 have sealed
ball bearings, and therefore do not need to be oiled.
Blower Wheel: Inspect the blower wheel annually to clear any soot, ash or coating which inhibits either rotation or
air ow. Remove all foreign materials before operating.
Vent System: Inspect all vent connections annually for looseness, for evidence of corrosion, and for ue gas leakage.
Replace, seal, or tighten pipe connections if necessary. Check the power venter choke plate to ensure it is secured
in place. Check the barometric draft control, if installed, to ensure the gate swings freely.
System Safety Devices: With the heating system operating, disconnect the pressure sensing tube from the pressure
switch on the venter. This should stop the burner operation. Re-connecting the tube will relight the burner. For 30
millivolt operating systems, disconnect one lead of the spill switch circuit from the thermocouple junction block.
This should shut o the pilot and the burner. Re-connection will allow re-lighting of the pilot.
5. Visually determine that the main burner is burning properly, i.e. no oating, lifting, or ashbacks. Adjust the
primary air shutter as required by the appliance manufacturer. If the appliance is equipped with high and low
ame control or ame modulation, check for proper main burner operation at both ame levels.
6. Test for exhaust gas spillage at the draft hood or the barometric draft control after approximately 5 minutes of
main burner operation. Use a draft meter or ame or smoke from match, candle or cigarette.
7. Turn on all fuel burning appliances within the same room so that they operate at their maximum capacity. Then
repeat Steps 5 and 6.
8. Return all doors, windows, exhaust fans, replace dampers, and any other fuel burning appliances to their
previous condition.
P/N 46246300 Rev M 04/20
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