Air Pressure Switch; Igniter And Flame Sensor Assembly - L.B.White Premier 40 Manual Del Usario

FIG. 12
MOTOR MOUNT PLATE
MOTOR
3/16 IN / 4.7 mm

Air Pressure Switch

The air pressure switch is located on the cold air hous-
ing internal to the heater. It must work properly to
allow an ignition cycle. If the air pressure 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 . See Fig. 13.
To service:
-- Disconnect the 2 wires attached to the switch.
Unhook the air pressure line attached to the - (NEG)
port. Remove the 2 screws holding the switch to the
cold air housing.
-- Reassemble by reversing above steps.
FIG. 13
Premier Ductable Heater
FAN WHEEL
CLEARANCE
Owner's Manual • Premier 40
Igniter and Flame
Sensor Assembly
The igniter is of local sense design, meaning it
also serves to sense burner fl ame.
1. See Fig. 14 for location of igniter/sensor
assembly.
2. Remove the 2 screws securing the igniter
assembly to the burner.
3. Disconnect high voltage cable from igniter
assembly.
4. Remove the two screws that secure the igniter
sensor to the burner chamber.
• The igniter and ground rod should be cleaned
to maintain proper ignition.
-- Use steel wool or emery cloth.
-- Rub briskly to remove buildup of dust, dirt,
and oxide.
• Check the igniter's ceramic base for cracks.
-- Replace the igniter if cracks are found.
FIG. 14 IGNITER
19
1/8" 3 mm GAP