Service Instructions - L.B. White Journeyman Owner's Manual

your gas supplier check the date codes on all regulators
installed and check delivery pressures to the heater to
make sure that the regulator is reliable.

Service Instructions

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 components or gas train components.
■ 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.
1. Close the fuel supply valve to the heater and
disconnect the electrical supply before servicing unless
necessary for your service procedure.
2. Clean the heater's orifice with compressed air or a soft,
dry rag. Do not use files, drills, broaches, etc. to clean
the orifice hole. Doing so will enlarge the hole, causing
combustion or ignition problems. Replace the orifice if it
cannot be cleaned properly.
3. The high limit and thermostat can be tested by discon-
necting the leads at the component, and jumpering the
leads together:
-- Reconnect the electrical supply and open fuel supply
valves.
-- If the heater lights, the component 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 components is to
perform a continuity check.
4. Servicing the differential air pressure switch:
-- The differential pressure switch is non- adjustable. If the
switch does not make the circuit after inspection of tubes
and orifices, it must be replaced.
5. Open or remove the respective case panel for access
to fan related components.
Journeyman Ductable Dual Fuel Indirect-Fired Heater
Owner's Manual • Journeyman
6. For reassembly, reverse the respective service
procedure. Ensure gas connections are tightened
securely.
7. After servicing, start the heater to ensure proper
operation and check for gas leaks.
Motor/Fan Blades Assembly
DANGER
Electrical Shock
Disconnect electrical power supply before working.
To access the main motor & fan blades:
• Remove the 7 screws securing the guard to the
fan section.
SCREWS (X7)
• Remove the fan guard.
Fan Motor
1. Loosen the electrical access plate's screws on the motor
and remove the access plate.
19
ACCESS
PLATE