L.B. White Tradesman 400 Dual Fuel, Owner'S Manual And Instructions, Page: 18 / 120

Tradesman Construction Heaters
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Owner’s Manual • Tradesman
18
FIG. 14
FIG. 15
■ Tradesman 400: Limit switch located on burner
plate. See Fig. 16.
FIG. 16
TESTING
The switches should be tested annually.
1. Remove the appropriate switch. Apply a small,soft
fl ame to the sensing disk of the switch. Be careful not
to melt the switch’s plastic housing when conducting
this test.
2. Within a short time, you should hear the contacts
of the switch opening. Check for continuity across
terminals to ensure the switch has opened.
3. Allow the switch to cool. The switch contacts will
close. Check for electrical continuity across the switch
terminals to ensure contacts have closed.
Igniter
■ Regardless of model, disconnect the ignition cable from
the ignitor. See Fig. 17, Tradesman 170 shown.
a. Tradesman 170 heaters:
-- Remove the screw from the ignitor bracket. See Fig.
17.
b. Tradesman 400 heaters:
-- Remove the igniter mounting screw, nut, and washer.
See Fig. 18.
FIG. 17
FIG. 18
1 EACH SPACER AND
NUT PER MOUNTING
SCREW
HEIGHT ADJUSTMENT LEG
TRADESMAN 170
P
N
1 EACH
SPACER AND
NUT, AND 3
WASHERS PER
MOUNTING
SCREW
MOUNTING
SCREW
IGNITION
CABLE
WASHER MUST BE LOCATED
BETWEEN IGNITER AND
BURNER PLATE
MOUNTING
SCREW, NUT,
AND WASHER