Service Instructions; Drive Components; Tools Required - L.B.White Foreman CI500 Manual Del Usuario

20
Foreman Ductable Dual Fuel Indirect-Fired Heater

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
fi re or explosions, causing property damage,
injury, or death.
1. Close the fuel supply valve to the heater and discon-
nect the electrical supply before servicing unless
necessary for your service procedure.
2. Clean the heater's orifi ce with compressed air or a
soft, dry rag. Do not use fi les, drills, broaches, etc. to
clean the orifi ce hole. Doing so will enlarge the hole,
causing combustion or ignition problems. Replace
the orifi ce if it cannot be cleaned properly.
3. The high limit switches, HEAT/VENT switch, and
thermostat 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 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
orifi ces, it must be replaced.
Owner's Manual • Foreman
5. Open or remove the respective case panel for
access to fan related components.
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.
8. If any fan keys are lost during service, replace-
ments are easily made by using 3/16 square x 1
in. bar stock. Otherwise order part # 22955.

Drive Components

Tools required:

2 ft. long straight edge
1/2 inch open-end wrench
1/4 allen key
5/32 allen key
1/2 socket
3/8 socket
Ratchet
1/4" nut driver
To get access to the main fan drive components,
remove the three hex bolts located under the heater
frame.
Hex Bolts
Remove the rear panel by pulling it out and sliding it
down.