Carrier Atmosphera 42EM series - 4.6 Fan Motor Assembly Details

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4.6 - Fan motor assembly
4.6.1 - Codification
42EM 1 0 XXXXX....
• Unit size (chassis):
1, 2 or 3
• Fan motor assembly size:
0, 1, 2, 3
The 42EM Atmosphera size 1 has a multi-speed fan motor
assembly (size 0) with forward-curved, double-inlet, single-
wheel fans.
The 42EM Atmosphera size 2 or 3 can be equipped with four
fan-motor assembly sizes (0, 1, 2 or 3), depending on the
required air flows/pressures. Sizes 2.0 and 3.0 are equipped
with the same fan motor assembly; it is the same for sizes
2.1/3.1, 2.2/3.2 and 2.3/3.3. This is a multi-speed fan motor
assembly (size 0) with forward-curved, double-inlet, double-
wheel fans.
The fan motor has 6 speeds, provided by a multi-winding
electric motor. Three speeds must be selected to allow connec-
tion of the fan motor in accordance with the applicable electro-
mechanical or electronic regulations.
Minimum speed: terminal 6
Maximum speed: terminal 1
• As standard, 42EM units are prewired to the factory
settings, for speeds 1, 3 and 5.
• For other fan motor speed wiring combinations refer to
the unit codification.
Min. speed = Terminal 6
Max. speed = Terminal 1
Low speed = red wire
Medium speed = grey wire
High speed = black wire
Red
Grey
Black
4.6.2 - Maintenance/access
1. Remove the door.
Loosen 3 screws
Remove 3 screws
2. Remove the fan motor assembly.
Remove 3 screws
NOTE: In order to simplify maintenance, the fan motor
assembly is fixed by 2 screws.