Premier Ductable Heater
www.lbwhite.com
Owner’s Manual • Premier 40
18
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. Clean the heater’s ori
fi
ce with compressed air or
a soft, dry rag. Do not use
fi
les, drills, broaches,
etc. to clean the ori
fi
ce hole. Doing so will enlarge
the hole, causing combustion or ignition problems.
Replace the ori
fi
ce if it cannot be cleaned properly.
3. The high limit switch can be tested by:
-- Disconnecting 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 immedi-
ately.
-- An alternate method for checking components is
to perform a continuity check.
4. The air pressure switch must not be jumpered. If
jumpered, the ignition control will not allow heater
operation. Test the air pressure switch for continu-
ity. If defective, replace the switch.
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
such as gas valves, or gas hoses.
■
All component parts must be replaced if defects
are found.
■
Failure to follow this warning will result in
fi
re or
explosions, causing property damage, injury, or
death.
Motor & Fan Assembly
1. To access the blower motor: remove the 8 screws
located on the underside of the base; 4 each on both
long sides of the heater. Spread the bottom sides
outward and lift up clearing the internal components.
2. Remove the 4 nuts that attach the blower outlet panel
to the fan housing; pull the panel outward to clear the
weld-studs from the housing. Disconnect the motor
leads. Remove 4 screws securing the motor mounting
plate to the fan housing and pull the motor assembly
out.
3. Loosen set screw on fan wheel.
4. Pull the fan wheel from motor shaft.
5. Remove the four nuts securing motor to
mounting plate.
6. Assemble in reverse.
FIG. 11
5. Open the front case panel for access to the heat-
ers interior components.
6. Disconnect the appropriate electrical leads when
replacing components.
7. For reassembly, reverse the respective service
procedure. Ensure gas connections are tightened
securely and leak checked.
8. After servicing, start the heater to ensure proper
operation.
