Thermocouple - L.B. White 140 Owner's Manual And Instructions

THERMOCOUPLE

1. Remove the thermocouple at the pilot gas control
valve. See Fig. 20.
2. Loosen the thermalfuse retaining clip screw.
See Fig. 20.
3. Loosen upper retaining nut on thermocouple.
See Fig. 21.
4. Remove the thermocouple, with nuts and cover, from
the heater assembly.
5. Transfer nuts and cover to replacement
thermocouple. Position as shown in Fig. 22.
6. Position the thermalfuse under the retaining clip and
tighten the screw.
7. Install the thermocouple. Angle the thermocouple tip
to allow passage through the keyhole slot and into the
thermocouple location hole of the burner plate. Pull
up on the thermocouple lead so the lower nut is tight
against the inside of the heater housing. Tighten
upper nut against the housing. See Fig. 23.
8. The installed finished position of the thermocouple is
1/2 - 9/16 inch from the top edge of thermocouple to
the heater housing. See Fig. 23.
9. Thread the nut on thermocouple into gas control
valve. Tighten finger tight and snug in place. DO NOT
OVERTIGHTEN.
FIG. 20
INJECTOR
BODY
THERMOCOUPLE
18
SCREW
RETAINING
CLIP
THERMAL
FUSE
FIG. 21
THERMOCOUPLE INSTALLED
LEAD END OF THERMOCOUPLE
FIG. 22
COVER
5/16"
FIG. 23
THERMOCOUPLE INSTALLED
UPPER RETAINING NUT
KEY HOLE SLOT
THERMOFUSE
THERMOCOUPLE
LEAD
COVER
UPPER NUT
LOWER NUT
INJECTOR TUBE
THERMOCOUPLE
THERMOCOUPLE BODY
RETAINING NUT
1/2 IN TO 9/16 IN
COVER
THERMOCOUPLE TIP
LOCATION HOLE IN PLATE
COVER
FINISHED
POSITION