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6 - FAN MOTOR ASSEMBLY
6.1 - Description
The ICM has either a single inlet or double inlet high static
pressure fan motor assembly.
It uses a 230 V ± 10%, 50 Hz single phase power supply and
runs at variable speed under the control of either a Carrier
numeric Controller or other speed controller specified by
Carrier.
6.2 - Removing the fan assembly
WARNING:
Disconnect the power supply to the ICM before carrying out
any work on the unit.
If the fan develops a fault the whole assembly must be
removed and replaced.
a) Loosen the duct-securing collar, disconnect the fresh air
duct and then disconnect the power supply cable to the fresh
air valve if fitted.
b) Unscrew the 6 hexagon head screws (8 mm AF) securing
the fan access panel. Remove the panel.
c) Disconnect the quick connect power supply cable for the
fan motor assembly.
d) Disconnect the electric heater supply cable if fitted (size 1.1
or 1.2 ICM). The cable has three wires terminating in flat
spade connectors.
ACCESS PANEL
FIXING SCREWS
FAN MOTOR ASSEMBLY
ACCESS PANEL
FIXING SCREWS
e) The fan assembly is held in place by one hexagon head screw
(8 mm AF) and three lugs. Remove this screw and slide the
assembly free of the lugs.
f) Remove the two hexagon head screws (8 mm AF) securing
the electric heater to the casing and remove the heater.
g) Replace the fan motor assembly and follow the procedure in
reverse order to complete the installation.
WARNING:
The electrical connections to the fan motor must be made in
accordance with the labels on the connector block.
Terminal 4: Split phase with permanently connected
capacitor - connect the black wire
Terminal 2: Primary phase - connect the brown wire
Terminal 1: Neutral - connect the blue wire
Earth: connect the green/yellow wire
Capacitor
Blue
Brown
motor
motor
Terminal block
Green/
Black
yellow
capacitor
motor
15
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