Oval Radiant Tube Heaters
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Owner’s Manual • Oval Radiant Tube Heaters
20
Air Differential Pressure
Switch, Tubing and
Orifices.
Air inlet plate orifice:
See Fig. 20. Ensure this orifice is free of dust. If the
orifice is plugged, remove the two screws that hold
the plate to the burner box. Clean using compressed
air.
FIG. 20
Pressure switch tube:
See Fig. 21. Check for
blockage. Clean with compressed air after removing
the tube from the switch and the air inlet plate orifice.
FIG. 21
Motor and Fan Assembly
1. Disconnect motor leads.
2. Remove the four (4) motor mounting screws.
See Fig. 18.
FIG. 18
3. Remove motor/fan wheel assembly from fan housing.
See Fig. 19.
FIG. 19
