Carrier 50FC 020-099, Installation, Operation And Maintenance Instructions, Page: 30 / 80

30
The grounding lug (PE), located on the panel plate, is
used to earth the frame of the unit.
Customer connection
8.5 - “50FC” electronic control
“50FC” electronic control is basically comprised of a control board,
sensors, a graphic terminal, an user terminal (optional), a touch
panel (optional) and a BMS card (optional).
By default, this control is supplied with a graphic terminal,
installed on the unit’s electrical cabinet, but it can also be remotely
connected:
■
Up to 50 metres, it can be connected directly with telephone wire.
■
From 50 to 200 metres, it is necessary to use the TCONN bypass
cards and AWG 20/22 shielded cable with 2 twisted pairs.
The user terminal (optional) or the touch panel (optional) can
be installed in the electrical cabinet when the graphic terminal is
remotely connected.
Note: Refer to the “50FC” control brochure to obtain more detailed
information on its operation.
The fan for cooling the
electrical cabinet, the
graphic terminal and the
ground connector, all
located on the door, must
be disconnected before
removing the door.
Electrical components are
identi
fi
ed and all wires are
numbered. It permits easy
tracing and diagnostics.
Power cables are identi
fi
ed
with the colors: black (L1)
- Brown (L2) - grey (L3) -
yellow/green (Ground).
8 - ELECTRICAL CONNECTION
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 (models 052 to 099)
●
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 or gas
boiler (optionals)
The following image shows the location of boxes in a two-circuit
unit with “Standard” assembly:
Graphic
terminal
User
terminal
Touch
panel
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).
No. 50FF/FC 020 to 099
1 Main power supply 400 III (±10%) 3 Wires + Neutral
2
Remote connection of graphic
terminal (by default installed on the
electrical cabinet) (1)
Telephone cable 6 wires
standard (RJ12 connector)
3 Connection of user terminal
(optional) (2)
2 wires for power supply
230V + 1 shielded cable
for communication type
AGW20 / 22 (1 braided pair
+ dra shielding)
4 Remote o
ff
/on (optional) 2 wires
5 General fault signal (opt.) (3) 2 wires
6 Remote Cooling/Heating (optional
upon request)
2 wires
7 Circulation pump signal for HWC
(antifreeze safety) (optional)
1 wire
8 Ambient sensor
NTC 2 wires
RS485 5 wires (4)
9 CO2 sensor (optional) 3 wires
(1) In this case, it´s possible to install the user terminal on the electrical cabinet.
(2) It’s necessary that the terminal uses the same power supply that the control
board.
(3) The output for general alarm signal is not compatible with the following
options: hot water coil, heat recovery coil, gas boiler, rotary heat exchanger
and on/o
ff
signal for external humidi
fi
er. With these options, possibility of
general alarm upon request.
(4) Up to four RS485 ambient sensors can be connected in series on the
fi
eld-bus of the control board.
1
2
3
5
6
8
9
7
4
BOX1
BOX2
C1
C2
C3
C4
BOX3
BOX6
BOX4
CE
Vext1
Vext2
Vint1 Vint2
BOX7
BOX8