Wayne HSG200, User Manual

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2. As mentioned above, the switch should never require maintenance. However a pinched tube will shut
off the flow of pressurized air to the diaphragm creating a failure made similar to bad air proving switch.
Always check to ensure that the clear tubing is not pinched. Make sure the spring cover is reinstalled over
the tube.
3. Switch is mounted in the horizontal position with terminals up from factory. Final burner mounting
should maintain horizontal switch position.
Damage to internal components of burner may result, if air proving switch
is mounted in another position other than horizontal.
C. COMBUSTION AIR BLOWER AND MOTOR
1. Cleaning of the combustion air blower is indicated if the blades show an accumulation of dust and lint,
or if the character of the flame indicates a deficiency of combustion air.
2. The side plate, motor and blower wheel are removed as one assembly. Disconnect the motor wire
inside the junction box beneath the ignition transformers. Remove the four
5/16” hex slotted screws
securing side plate to fan housing.
Do not remove blower wheel from motor shaft during periodic cleaning.
3. Should removal of the blower wheel be necessary for cleaning or replacement of it or the motor, the
blower wheel must be positioned correctly on the motor shaft (Figure 24).
HSG200 blower wheel part number
21664 is positioned 2 1/16” (52.4mm) measured from the
blower wheel inlet ring face to the side plate face.
HSG400 blower wheel part number
21642 is positioned 2 3/16” (55.6 mm) measured from the
blower wheel inlet ring face to the side plate face.
Electrical Hazard
If a jumper is used to check the pressure switch it must be removed
or an unsafe operating condition can occur resulting in personal
injury or death.