Electrical connections
Preliminary instructions
The choice and installation of system components is left to the skilled
installer, who shall operate pursuant to the best practices and the
legislation from time to time in force.
The manufacturer waives all liability for damages caused by lack of
grounding or departure from the electrical diagrams.
Check that:
The characteristics of the power supply network shall be appropriate
for the unit’s power requirements, taking into account also other
equipment which might be operated in parallel.
Electrical voltage shall be equal to the nominal value +/-10%.
Mandatory items:
The use of an omnipolar magnetothermic switch, lockable line
disconnector, compliant with CEI-EN standards (contacts open by
at least 4 mm), with adequate disconnection power and differential
protection in compliance with the electrical data table below, installed
next to the unit.
Ground the unit thoroughly.
At the end of the connections, fasten the cables with the appropriate
cable glands and replace the terminal boxes’ covers.
Do not use gas and water pipes to ground the unit.
Connection
- Punch out the connection points in the pre-cut part.
- Remove the pre-cut part.
- Remove the hole’s cutting edges.
- Insert the supplied cable protections .
- Only for size 015 use the strain relief supplied with the unit
- Thread the cables through the holes from the outside, guiding them
towards the electrical panel.
- Fasten the cables with the supplied cable grips.
Avoid any direct contact with non insulated copper pipes and the
compressor.
It is forbidden to thread the unit’s electrical wires in positions not
specifically foreseen in this manual.
4
Electric connections inlet
4
1
2
3
L
N
A
B
15
L
N
L
N
N N L
4 19 9
C W G Y
2 3 6 7
N N L
4 19 9
C W G Y
2 3 6 7
N N 18
10 11
12
4 5 16
13 14
15
C W G Y
23 24 1
2 3 6 7
8 21 22
5
9
8
1
2
3
4
6
7
S1
S2
S3
N
N
18
10
11
12
4
5
16
C
W
G
Y
13
14
15
7
6
3
2
1
8
21
23
24
2
5
4
1
3
Remote control
9
8
7
6
S1
S2
S3
L
N
10
10
L N
30
40
L1 L2 L3 N
L
N
L
N
004 ME - 006 ME
008ME - 012 ME
015 ME
A
Unit
B
Control panel
S1
OFF (open contact) - ON (closed contact)
S2
Cooling (closed contact)/Heating(open contact)
S3
Normal (open contact)/Eco (closed contact)
1
3-way valve (only N-10 for spring models)
2
Auxiliary heat source required for DHW / Dehumidification
3
Additional water circulator / Water pipe trace heaters
4
External heat source / Defrosting
5
Alarm / Signal that Ambient Temperature has been Reached
6
Maximum frequency reduction
7
Domestic water requested
8
External alarm input
9
External temperature sensor (NTC 3k @25°C)
22
