Carrier 50FC Installation, Operation And Maintenance Instructions page 23

8 - ELECTRICAL CONNECTION
Models 180 to 280:
Electric
cabinet
Electric
power
supply
inputs
The fan for cooling the electrical cabinet, the graphic terminal
and the ground connector, all located on the doors, must be
disconnected before removing the doors.
These doors have hinges + quarter-turn latches.
These latches of stainless steel have triangular insert
8 mm (supplied wrench). The closing is done by
rotating 90º (anti-clockwise): it brings the latch to the
locked position.
Dual locks can function as hinges or can be used
to remove the door. Check that the locks are not
blocked. Open them with a 4 mm Allen wrench (in an
anti-clockwise direction).
Electrical components are identifi ed and all wires are numbered. It
permits easy tracing and diagnostics.
Power cables are identifi ed with the colors: black (L1) - Brown (L2)
- grey (L3) - yellow/green (Ground).
Important:
The grounding lug (PE),
located on the panel
plate, is used to earth
the frame of the unit.
PE
The main components of the unit are connected in intermediate
boxes located next to these components.
● BOX1: Motor-compressor circuit 1
● BOX2: Motor-compressor circuit 2
● BOX3: Mixing box
● BOX4: Indoor unit
● BOX5: Rotary heat exchanger (optional). In this case the box
is located in the wheel module.
● BOX6: Return box (optional)
● BOX7: Electrical heaters (optional)
● BOX8: Hot water coil or heat recovery coil or gas burner
(optionals)
The following images show the location of these boxes:
Models 100 to 170:
BOX3
BOX6
C2
BOX1
C1
Outdoor fans
Electric cabinet
Models 180 to 280:
BOX3
BOX6
C4
BOX2
C3
Outdoor fans
C2
BOX1
C1
Electric cabinet
BOX4
BOX7
BOX8
C4
BOX2
C3
BOX4
BOX7
BOX8
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