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14 - ELECTRICAL CONNECTIONS
General fault alarm:
Connector
1
2
J3 (CPU)
Remote control: Connect the unit's general fault reporting or alarm
to the terminals on the unit's terminal strip (see wiring diagram).
• Output specification: 2 A sous 250 V.
Automatic operation control:
Connector
1
2
3
J6 (CPU)
CA
Remove shunt "CA" from between the terminals on the unit terminal
strip (see wiring diagram) and connect a "C1" contact to these
terminals (high-quality polarity-free contact).
• Contact open → unit off
• Contact closed → unit authorised to run
• Input specification: 24 V - 15 mA.
Display of the operating state of pump No. 1
Connector
1
2
3
J5 (CPU)
• Contact open → Pump off
• Contact closed → Pump in operation
• Input specification: 24 V - 15 mA.
Other connections can be made to the CPU board
Water pump control
Connector
1
2
J3 (CPU)
Connect the supply to the pump relays between the terminals of
the connector on the main board.
• Output specification: 2 A under 250 V
Setpoint 1/setpoint 2 selector control
Connector
1
2
3
J6 (CPU)
Connect a "C2 " contact to the connector on the CPU board (high-
quality polarity-free contact)
• Contact open → setpoint 1
• Contact closed → setpoint 2
• Input specification: 24 V - 15 mA
11 12 13 14 15 16
230 V
Alarm
4
5
6
10
11
C1
4
5
6
10
11
K
14 15 16
Pump relay No. 2
230 V - 8 A
Pump relay No. 1
230 V - 8 A
Shared
4
5
6
10
11
C2
Display for operation at full power (if P111 = max P)
Connector
1
2
J3 (CPU)
Connect the signalling of the unit operating at max. output to
terminals 1 and 2 of the connector on the CPU board.
• Output specification: 2 A under 250 V.
"Load shedding" function control
Connector
1
J6
J6 (CPU)
(CPU)
Connector J2
1
J2
(Circuit board 2) ADD 2
(Carte circuit 2) ADD 2
Connect 1 to 4 contacts to the terminals of the connector of the
CPU board according to the number of the compressors to be
shed. 1 contact per compressor (contact free of any polarity and
of good quality).
• Contact open → normal operation,
• Contact closed → compressor load shedding.
• Input specification: 24 V - 15 mA.
NOTE:
• Connection to be made on site by the customer,
• Precautions for connection. See manual for the regulator
and the electrical diagram of the unit.
Communication
• In the room, a control and display console is used to run an
instant check on the unit; it enables the user to communicate
with the microprocessor, to configure the unit and to adjust
the setpoints.
• Electronic remote control (option):
Installed in the machine room, this will be connected to the
unit by a pair of telephone-type wires (max. distance 1000
m). For a description of functions and connection, see
CHILLER/HEATPUMP CONTROL manual.
• Relay board(s) (option):
This board is installed in a cabinet in the machine room and
can remotely report on all the unit's operating states and
faults by providing contacts which are potential-free when
closed. The board will be connected to the unit by a pair of
telephone-type wires (max. distance 1000 m).
• Communication with centralised management system and
see the option in the CHILLER/HEATPUMP CONTROL
manual.
For a description of boards and connection, see the CHILLER/
HEATPUMP CONTROL manual.
9 10 11
15 16
230 V
7
8
9
10
11
stage
N° 1 N° 2
7
8
9
stage
N° 3 N° 4
13
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