14
Refer to Fig. 16 ( shown w/o wires connected for clarity) and
following table for connection of wiring and voltage checks.
The relay has numbers adjacent to the male 6.4 mm male
terminals for reference.
Terminal
Function
2
Incoming power to igntion controller
4
Power to fan motor
6
Neutral for fan motor
8
Neutral for ignition controller
0
220/240 VAC input for relay coil closure
(sends 220/240 VAC from terminal 2 to
terminal 4 to start the motor
1
Neutral for relay
If the relay is receiving 220/240 VAC but voltage is not
supplied to the fan motor, the relay is defective.
FIG. 16
The controller will attempt three trials for ignition if ignition
of the fuel gas does not occur. Each trial takes
approximately 15 seconds. If ignition is not achieved, the
ignition control shuts the heater down.
-- Ignition spark is discontinued
-- Fan motor stops
-- The ignition control must be reset to restart the
heater.
If replacing, carefully remove the wiring harnesses and
ignition cable from the controller.
The igntion controller does not have any serviceable
componets. If the controller is defective, it must be
replaced. Do not attempt to repair.
FIG. 15
IGNITION CONTROLLER
RELAY
The transformer reduces 220/240VAC to 24 VAC for
operation of the gas control valve. If 24 VAC is absent from
the transformer, the gas control will not open and ignition will
not occur.
See Fig.17 for location of the transformer and output
terminal reference.
FIG. 17
TRANSFORMER
RESET SWITCH
The reset switch is located on the top of the control box at the
fan motor end of the heater. See Fig. 18.
Turn the rubber boot counterclockwise to remove the boot
from the switch.
Check for electrical continuity across the component
to determine if it is defective.
FIG. 18
2
4
6
8
1
0
24 VAC
OUTPUT
RESET SWITCH AND
BOOT
