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11 - ELECTRIC HEATER
11.2 - Replacing the electric heater
CAUTION:
It is vital to disconnect the ICM from the general power
supply before carrying out any work on the electric heater.
If the electric heater develops a fault, the assembly must be
removed and replaced; the fan unit will have to be removed to
make this possible.
a) Remove the collar securing the fresh air duct.
b) Remove the fan motor access panel (secured by 6 hexagon
head screws).
c) Disconnect the quick connect power supply cable on the fan
motor.
The electric heater is in the discharge air outlet.
d) Unscrew the fan motor assembly fixing screw and slide the
assembly free of the lugs. Remove the fan motor assembly.
e) Disconnect the electric heater cable (3 wires terminating in
flat spade connectors).
f) Release the heater mounting from the discharge air spigot by
unscrewing the single hexagon head screw (complete with
washer) and remove the heater.
g) Replace the defective heater.
h) Use the above procedure in reverse to instal the new heater
and to reinstall the fan motor assembly.
WARNING:
Do not touch the heater elements when the heater is switched
on.
ACCESS PANEL FIXING
SCREWS
FAN MOTOR
ASSEMBLY
ACCESS PANEL
DISCHARGE AIR SPIGOT
ELECTRIC HEATER
3 WIRES TO BE
DISCONNECTED
FAN MOTOR FIXING
SCREW
