
31
8.7 - Sensors connection by the costumer
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.
Connection of the ambient probe
■
To do this, the following steps are recommended:
- 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).
- This probe must be fastened to the panel or the wall of the
room to be conditioned, at ca. 1.5 m height.
■
Electrical connection:
Make the electrical connection according to the unit con
fi
guration:
- NTC Probe S5a: B5 (connector
J3): with 2 x 1,5 mm
2
section cable,
within a maximum distance of 30
meters.
Note: If the unit needs the outdoor humidity probe, used with
enthalpic or thermoenthalpic management of the economizer,
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.
Connection of the outdoor humidity probe (optional)
■
The outdoor humidity probe (optional), necessary for the
enthalpic and thermo-enthalpic management of the economizer,
must be installed on-site, on the hood of the fresh air intake.
- Open the case by turning the top cover anticlockwise (
fi
g1).
- Fasten the rear of the sensor case to the side panel of the
hood (use the screws supplied together with the probe)
placing the screws in the holes provided (
fi
g.2).
- Make sure that the screws that hold the board protective
cover are fastened tightly (
fi
g.3).
- Close the sensor by turning the cover clockwise (
fi
g.4).
8.6 - Location of sensors on the machine
4-way valve
(heat pump)
Outdoor fan
Compressor
High press.
pressostat
S3
Supply air probe
Outdoor temperature probe
S2
S7 (*)
High pressure
transducer
S1
Return air probe
S4
Mixing
probe
Discharge T
klixon switch
Fresh air
Air extraction
S5a
Ambient air probe
S10
Air quality probe
(opt.)
Outdoor coil
Indoor coil
Indoor fan
Electronic
expansion
valve
S6 (*)
Low pressure
transducer
S8 (*)
Suction
temperature
probe
8 - ELECTRICAL CONNECTION
(*) In units with 2 circuits:
• Low pressure transducers: S6 (circ.1) and S11 (circ.2)
• High pressure transducers: S7 (circ.1) and S12 (circ.2
• Suction temperature probes: S8 (circ.1) and S9 (circ.2)
Unit 1 circuit
- 1 to 4 RS485 probes (connector
J10): with AWG20 section cable,
single braided pair preferably
shielded with drain wire + Power
supply 24 Vac (2 wires).
• Temperature:
S21 to S24.
• Dual temperature-humidity:
S31 to S34.
Note: in the case of more than
one probe, connection of the
probes in series, in the RS485
network. Please, refer to the
control manual.
(
fi
g.1)
(
fi
g.2)
(
fi
g.3)
(
fi
g.4)
S5a
105
B5 (J3)
106
Electric
panel
NTC
NTC
S21 (T)
S31(T+H)
+(G) (G0) Tx
Rx-
Tx
Rx+ GND
Electric
panel
B10
110
No1
111
112 113 114
24Vac
A
WG20
RS485
network
Содержание 50FC 020-099
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