Air Proving Switch - L.B.White Guardian AD060 Manual Del Usuario E Instrucciones

NOTES:
a. Fan wheel to motor mount plate spacing must be
adjusted to the clearance specifi ed below before
tightening the fan wheel to the motor shaft. See
Fig. 10.
b. Make sure that set screw(s) of the fan are on the
fl ats of motor shaft when tightening.
FIG. 10
MOTOR MOUNT PLATE
MOTOR

Air Proving Switch

The air proving switch is located on the fan housing
at the motor end of the heater. It must work properly
to allow an ignition cycle. If the air proving switch
contacts are closed before the ignition control starts
the fan motor, or do not close on a call for heat after
the fan motor starts, ignition will not occur.
-- Remove the two (2) sheet metal screws holding
the switch with bracket to blower housing.
-- Remove the assembly by turning the switch
so the paddle on the switch arm can be pulled
through the oblong hole on side of fan housing.
FIG. 11
AIR PROVING SWITCH
Guardian LP or Natural Gas Heater
FAN WHEEL
1/4 in. AW060/100
CLEARANCE
1/8 in. AW250/325
Owner's Manual • Guardian
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