Air Proving Switch; Igniter And Flame Sensor Assembly - L.B. White TS080 Owner's Manual

AIR PROVING SWITCH

1. Open louvered case access panel.
2. Remove two sheet metal screws holding air proving
switch blower housing. Remove assembly by turning
switch assembly 90 degrees so the switch paddle can
be pulled through oblong hole on side of fan housing.
See Fig. 17.
3. Disconnect the leads from the air proving switch.
4. When installing replacement switch, use care in not
bending the switch arm, otherwise ignition problems
may occur.

IGNITER AND FLAME SENSOR ASSEMBLY

1. See Fig. 18 or 19, depending on heater model, for
location of igniter/sensor assembly.
2. Remove the two screws securing the mounting
bracket to the burner. Remove igniter assembly.
3. Disconnect high voltage cable from igniter assembly.
4. Remove the two screws that secure the igniter sensor
to the mounting bracket.
FIG. 18
Premier 170
1/2 IN./12.7 mm
1/2 IN. DISTANCE FROM IGNITER
TOP TO BURNER TOP
FIG. 19
Premier 80
1 1/2 IN. DISTANCE FROM�
1 1/2 IN. /3.8 cm DISTANCE FROM
IGNITER TO "V" OF�
IGNITER TO "V" OF BURNER
BURNER CASTING
CASTING
IGNITER BRACKET MOUNTING IGNITER BRACKET�
17
MOUNTING SCREWS
SCREWS
FRONT VIEW
MOUNTING BRACKET
IGNITER BRACKET
MOUNTING SCREWS
IGNITER/SENSOR MOUNTING SCREWS
HIGH VOLTAGE IGNITION LEAD
FRONT VIEW
MOUNTING BRACKET
FIG. 17
SWITCH W/ PADDLE
LEADS
■
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.
ELECTRODE GAP IS1/8" & CENTERED�
OVER BURNER PORT
IGNITER/SENSOR MOUNTING
IGNITER/SENSOR�
SCREWS
MOUNTING SCREWS
NUTS
PADDLE
OBLONG HOLE
HOUSING SIDE�
PANEL
TOP VIEW
1/8 IN./3.2 mm AND
ELECTRODE GAP IS 1/8" &
CENTERED OVER BURNER PORT
BURNER PORT
TOP VIEW
1/8 In./3.2 mm AND CENTERED
BURNER PORT