L.B. White 100 Tradesman Portable Forced Air - Manual (Page 13)

Service Instructions
1. Close the fuel supply valve to the heater and
disconnect the electrical supply before servicing
unless necessary for your service procedure.
2. Remove the heater top or the side panels for access
to heater components.
3 Disconnect the appropriate electrical leads for the
component being replaced.
4. The auto reset backflash can be tested by by-passing
it out of the electrical circuit.:
-- Reconnect the electrical supply and open fuel
supply valves.
-- If the heater lights, the switch is defective and
must be replaced.
-- Do not leave the jumper on or operate the heater
if the part is defective. Replace the part
immediately.
-- An alternate method for checking the component
is to perform a continuity check.
5. For reassembly, reverse the respective service
procedure. Ensure gas connections are tightened
securely.
6. After servicing, start the heater to ensure proper
operation and check for gas leaks.
7. Clean the heater’s burner orifice with compressed air
or a soft, dry rag. Do not use files, drills, broaches,
etc. to clean the orifice. Doing so may enlarge the
holes, causing combustion or ignition problems.
Replace the orifice if it cannot be cleaned properly.
WARNING
Burn Hazard
■ Heater surfaces are hot for a period of time after the
heater has been shut down.
■ Allow the heater to cool before performing service,
maintenance, or cleaning.
■ Failure to follow this warning will result in burns
causing injury.
WARNING
Fire and Explosion Hazard
■ Do not disassemble or attempt to repair any heater
component or gas train component.
■ All component parts must be replaced if defects are
found.
■ Failure to follow this warning will result in fire or
explosions, causing property damage, injury, or death.
GENERAL
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