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3.3.
Electrical connection
The electrical connections of a thermal system designed only for the heating of buildings is subject to numerous legal regulations of
a general and specific nature for the individual types of applications or fuel. It is therefore necessary to comply with local standards.
3.3.1.
Wiring diagram
IG
F
1
L
3
Lon
N
2
T
Thermoregulation
15
13
11
TA1
TA2
TA3
16
14
12
Re2
Re3
Re4
P3
6
CZ1
ELECTrICAL sPECIFICATIOns
Power supply: 230 VAC + 10% - 15%
Frequency: 50 Hz
Maximum total current: 4 A
IMPOrTAnT: if the sum of all connected power loads exceed 4 A (inductive), supply one or more of the power supplies via a
relevant contactor.
kEy CHArT:
IG:
Main switch
IPC: CH pump switch
IPS: DHW pump switch
IBR: Burner switch
L3:
Main pump light
L4:
Burner ON light
L5:
Safety thermostat light
L6:
Burner shutdown light (not supplied)
L7:
DHW re-circulation pump light
TA:
Room thermostat
R1:
CH thermostat: 1st contact
R2:
CH thermostat: 2nd contact
TS:
Safety thermostat
F:
F4A 250V fuse
BR:
Burner
BR - 2° stadio: burner 2nd stage control
PC:
CH pump
16
4
S
CENTRALINA
control unit
5
25
IPC
27
28
17
39
Re4
Re3
Re2
18
30
6
Re4
Re3
Re2
3
1
7
P2
P1
T
T
T
4
2
L3
PC
32
39
24
26
10
IPS
11
MN
C
TS
2
TA
8
IBR
1
2
9
19
L4
31
34
L7
L1
N
PS
20
33
35
PS:
DHW re-circulating pump
PR:
Boiler re-circulating pump
P1:
Zone 1 pump
P2:
Zone 2 pump
P3:
Zone 3 pump
TA1: Zone 1 room thermostat
TA2: Zone 2 room thermostat
TA3: Zone 3 room thermostat
S:
DHW priority thermostat (not supplied)
h1:
Burner 1st stage hour counter (not supplied)
h2:
Burner 2nd stage hour counter (not supplied)
*
Thermoregulation control unit and contacts (not
supplied)
**
Zone pump module (only for version P control
panels)
L5
21
R2
L6
22
24
h1
h2
22
23
12
13
14
T1
T2
S3
B4
BR - 2° STADIO
BR
21
11
R1
12
14
15
16
17
18
37
PR
B5
T8
T7
T6
36
38
fig. 6
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