Igniter And Flame Sensor - L.B. White AD250 Owner's Manual And Instructions

1. Close the fuel supply valves to the heater and
disconnect the heater from its electrical supply.
2. Remove the screw that secures the igniter assembly to
the heat chamber.
mounting slots. See Fig. 17.
3. To reassemble, reverse these procedures.
4. Reconnect the heater to its electrical supply. Open the
fuel supply valves to the heater.
5. Start the heater and test for proper operation.
FIG. 17
TO GAP IGNITER LOOSEN SCREW.
MOVE ENCLOSURE UP OR DOWN
TO ALLOW PROPER POSITIONING
TO REMOVE IGNITER / SENSOR WITH ENCLOSURE
REMOVE SCREW, LIFT ASSEMBLY
FROM ITS MOUNTING SLOTS
Lift the assembly from its
OF IGNITER TO BURNER.
IGNITER / SENSOR
ENCLOSURE

IGNITER AND FLAME SENSOR

IMPORTANT
■ The igniter/sensor assembly may require cleaning due to
accumulations of dust and dirt over a period of time,
affecting its ability to ignite fuel gas and sense burner
flame. Cleaning will require igniter/sensor removal.
-- If spark appears to be weak, briskly rub the igniter
electrode with emery cloth or steel wool to remove
any buildup. Recycle the heater.
--- If the spark appears strong but the heater cycles off,
briskly rub the sensor rod with emery cloth or steel
wool to remove any build-up. Recycle the heater.
■ Make sure that the igniter gap is 4 mm and the igniter tip
is positioned over the burner port according to the
illustration below. See Fig. 17.
SENSOR
IGNITER
4 MM
HEAT CHAMBER FACE
BURNER
IGNITER LEAD
SENSOR LEAD
18