25
The client must connect on-site the following probes:
● Ambient NTC (standard) or RS485 (optional).
● Air quality (optional).
● Outdoor humidity (optional).
These probes are supplied inside the electrical cabinet.
Please refer to the wiring diagram and the “50FC” control
brochure, both provided with the unit.
8.7 - Sensors connection by the costumer
Connection of the ambient probe
■ Open the case using a fl athead screwdriver in the slot, paying
extra care not to damage the electronic parts.
■ Fasten the rear of the sensor case to the panel or the wall (for
fastening the case, use the screws supplied with the fastening
kit, paying attention to use the proper spacers, to not damage
the sensor’s electronics).
Note: If the unit needs the outdoor humidity probe, used with
enthalpic or thermoenthalpic free-cooling, this one (S5h) will be
connected in the place of the ambient probe (S5a). In this case it is
necessary to use a RS485 ambient temperature probe connected
on the Field-bus.
8.6 - Location of sensors on the machine
Compr.
High press.
pressostat
S7
High
pressure
transducer
Discharge T
klixon switch
S6
Low
pressure
transducer
S8
Suction
temp.
probe
4-way
valve
(heat pump)
Outdoor fan
Outdoor temperature probe
S2
S1
Return
air probe
S4
Mixing
probe
Fresh
air
Extraction
S5a
Ambient
air probe
S10
Air quality
probe (opt.)
Outdoor coil
Indoor coil
S3
Supply
air probe
Indoor fans
4-way
valve
(heat pump)
Outdoor fan
Outdoor coil
Indoor coil
CIRCUIT 1 CIRCUIT 2
Electronic
expansion
valve
Electronic
expansion
valve
Compr.
High press.
pressostat
S12
High
pressure
transducer
Discharge T
klixon switch
S11
Low
pressure
transducer
S9
Suction
temp.
probe
Unit 2 circuits
8 - ELECTRICAL CONNECTION
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.
Graphic terminal User terminal Touch panel
1
2
3
5
6
8
9
7
4
No. 50FF/FC 100 to 280
1 Main power supply 400 III (±10%) 3 Wires + Ground + 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
+ drainwire + shielding)
4 Remote off /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 CO
2
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, rotary heat exchanger and on/off signal for
external humidifi 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.
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