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DHW
P4
Prestige
CH
Low
W
2
W
1
LOW T° SCHEMA : 2
en
41
System Control - ACVMax: 660Y2800 • B
EN
FR
NL
ES
IT
DE
PL
RU
PRESET CONFIGURATION 7  SOLO 2 PUMPS
High and Low temperature heating circuits, with room control on Heating Circuit
1 (CH1) and possible second room control, possibly with optional outdoor
temperature sensor and room thermostat, and with DHW circuit.
Electrical board terminals Terminal name --> Connected to
ACV Max
123456
1 2 3 4 5 6
W
W
W
W
W
W
4 5 6
1 2 3
1 2 3
4 6
X15
1 2 3 4 5 6 7 8 9 10
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
X11
6 7 8 9 10
1 2 3 4 5
6 7 8 9 10
1 2 3 4 5
16
15
3 4
1 2
X16
1 2 3 4 5 6 7 8 9 10
1 2 3 4 5 6 7 8 9 10 11 12 13 14
W
R
Or
Bk
Bk
V
Bk
42 1 3 2 1 1 2 3 1 2 3 4 5 6
8 9 10 11 12
1 2 3 4 5
13
6
14
7
X2
1 2 3 4 5 6 7 8 9 10
W
R
Y
R
Y
BK
BK
W
6 7 8 9 10
1 2 3 4 5
X3
1 2 3 4 5 6 7 8 9 10 11 12
V
W
R
Bk
7 8 9 10 11
1 2 3 4 5
12
6
X1
R
Bk
Y
Y
Bk
Bk
R
R
W
W
V
Y
Bk
Bk
R
Bk
W
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
W
W
W
W
W
W
W
V
1 2 3 4 5
1 2 3 4 5
8
Bk
2 31
1412 13
X12
X9
P14
123
4
123
456
B
V
B
W
P13
B
Or
123
Bk
B
Y/Gr
W
Br
B
Br
Br
Y/Gr
B
B
1 2 3 4 5 6 7 8
8 7 6 5 4 3 2 1
123
5
F00
X100
N
L
N
L
W
ON / OFF
3
230 V ~ 50Hz
1
N
L
N
L
N
L
2
6
B
Y/Gr
Br
B
Y/Gr
Br
Br
B
Bk
B
Y/Gr
Y/Gr
Y/Gr
Y/Gr
Y/Gr
Y/Gr
Y/Gr
V
B
Y/Gr
W
B
Y/Gr
Br
B
Y/Gr
Br
B
Y/Gr
B
Or
Br
B
Br
Y/Gr
B
X101
18
17
20
19
21
24
4
X10
12
X20
16
25
2 1
1
NTC 5
9
2 1
1
NTC 2
10
2 1
1
NTC 1
11
123
1
21234123456
X7
X4
X6
X5
Bus A
Bus - Ground
Bus B
0-10 Volt - Ground
0-10 Volt - Input
Cascade sensor - Ground
Cascade sensor - Input
NTC 3
NTC 4
1
2
22
23
26
X18
V
W
B
W
B
B
9 10 11 12 13 14 15 16
16 15 14 13 12 11 10 9
X100
7
Y/Gr
Y/Gr
B
W
B
W
B
V
B
Br
Y/Gr
B
Br
B
Br
Y/Gr
P4 P3
FL
27
5AT Fuse
5AT Fuse
5AT Fuse
............. ERR -->Error (Alarm)
............. DHW -->DHW pump
............. CH -->CH pump (low temp circuit)
............. P4 --> P4 pump
............. Flame -->Motorized 3-way valve CLOSE
............. P3 -->Motorized 3-way valve OPEN
ACV Max
123456
1 2 3 4 5 6
W
W
W
W
W
W
4 5 6
1 2 3
1 2 3
4 6
X15
1 2 3 4 5 6 7 8 9 10
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
X11
6 7 8 9 10
1 2 3 4 5
6 7 8 9 10
1 2 3 4 5
16
15
3 4
1 2
X16
1 2 3 4 5 6 7 8 9 10
1 2 3 4 5 6 7 8 9 10 11 12 13 14
W
R
Or
Bk
Bk
V
Bk
42 1 3 2 1 1 2 3 1 2 3 4 5 6
8 9 10 11 12
1 2 3 4 5
13
6
14
7
X2
1 2 3 4 5 6 7 8 9 10
W
R
Y
R
Y
BK
BK
W
6 7 8 9 10
1 2 3 4 5
X3
1 2 3 4 5 6 7 8 9 10 11 12
V
W
R
Bk
7 8 9 10 11
1 2 3 4 5
12
6
X1
R
Bk
Y
Y
Bk
Bk
R
R
W
W
V
Y
Bk
Bk
R
Bk
W
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
W
W
W
W
W
W
W
V
1 2 3 4 5
1 2 3 4 5
8
Bk
2 31
1412 13
X12
X9
P14
123
4
123
456
B
V
B
W
P13
B
Or
123
Bk
B
Y/Gr
W
Br
B
Br
Br
Y/Gr
B
B
1 2 3 4 5 6 7 8
8 7 6 5 4 3 2 1
123
5
F00
X100
N
L
N
L
W
ON / OFF
3
230 V ~ 50Hz
1
N
L
N
L
N
L
2
6
B
Y/Gr
Br
B
Y/Gr
Br
Br
B
Bk
B
Y/Gr
Y/Gr
Y/Gr
Y/Gr
Y/Gr
Y/Gr
Y/Gr
V
B
Y/Gr
W
B
Y/Gr
Br
B
Y/Gr
Br
B
Y/Gr
B
Or
Br
B
Br
Y/Gr
B
X101
18
17
20
19
21
24
4
X10
12
X20
16
25
2 1
1
NTC 5
9
2 1
1
NTC 2
10
2 1
1
NTC 1
11
123
1
21234123456
X7
X4
X6
X5
Bus A
Bus - Ground
Bus B
0-10 Volt - Ground
0-10 Volt - Input
Cascade sensor - Ground
Cascade sensor - Input
NTC 3
NTC 4
1
2
22
23
26
X18
V
W
B
W
B
B
9 10 11 12 13 14 15 16
16 15 14 13 12 11 10 9
X100
7
Y/Gr
Y/Gr
B
W
B
W
B
V
B
Br
Y/Gr
B
Br
B
Br
Y/Gr
P4 P3
FL
27
5AT Fuse
5AT Fuse
5AT Fuse
............. DHW sensor (NTC3)
............. Optional outdoor temp. sensor (NTC4)
............. Optional room thermostat 1
............. Optional room thermostat 2
ACV Max
123456
1 2 3 4 5 6
W
W
W
W
W
W
4 5 6
1 2 3
1 2 3
4 6
X15
1 2 3 4 5 6 7 8 9 10
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
X11
6 7 8 9 10
1 2 3 4 5
6 7 8 9 10
1 2 3 4 5
16
15
3 4
1 2
X16
1 2 3 4 5 6 7 8 9 10
1 2 3 4 5 6 7 8 9 10 11 12 13 14
W
R
Or
Bk
Bk
V
Bk
42 1 3 2 1 1 2 3 1 2 3 4 5 6
8 9 10 11 12
1 2 3 4 5
13
6
14
7
X2
1 2 3 4 5 6 7 8 9 10
W
R
Y
R
Y
BK
BK
W
6 7 8 9 10
1 2 3 4 5
X3
1 2 3 4 5 6 7 8 9 10 11 12
V
W
R
Bk
7 8 9 10 11
1 2 3 4 5
12
6
X1
R
Bk
Y
Y
Bk
Bk
R
R
W
W
V
Y
Bk
Bk
R
Bk
W
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
W
W
W
W
W
W
W
V
1 2 3 4 5
1 2 3 4 5
8
Bk
2 31
1412 13
X12
X9
P14
123
4
123
456
B
V
B
W
P13
B
Or
123
Bk
B
Y/Gr
W
Br
B
Br
Br
Y/Gr
B
B
1 2 3 4 5 6 7 8
8 7 6 5 4 3 2 1
123
5
F00
X100
N
L
N
L
W
ON / OFF
3
230 V ~ 50Hz
1
N
L
N
L
N
L
2
6
B
Y/Gr
Br
B
Y/Gr
Br
Br
B
Bk
B
Y/Gr
Y/Gr
Y/Gr
Y/Gr
Y/Gr
Y/Gr
Y/Gr
V
B
Y/Gr
W
B
Y/Gr
Br
B
Y/Gr
Br
B
Y/Gr
B
Or
Br
B
Br
Y/Gr
B
X101
18
17
20
19
21
24
4
X10
12
X20
16
25
2 1
1
NTC 5
9
2 1
1
NTC 2
10
2 1
1
NTC 1
11
123
1
21234123456
X7
X4
X6
X5
Bus A
Bus - Ground
Bus B
0-10 Volt - Ground
0-10 Volt - Input
Cascade sensor - Ground
Cascade sensor - Input
NTC 3
NTC 4
1
2
22
23
26
X18
V
W
B
W
B
B
9 10 11 12 13 14 15 16
16 15 14 13 12 11 10 9
X100
7
Y/Gr
Y/Gr
B
W
B
W
B
V
B
Br
Y/Gr
B
Br
B
Br
Y/Gr
P4 P3
FL
27
5AT Fuse
5AT Fuse
5AT Fuse
The room thermostat 1 always controls the low temperature system.
Essential recommendations for the correct operation of the system
Low temperature sensor is not shown here, but make sure to install one to control the
circuit (using the additional wiring made available in the optional wiring kit).
Low temperature cut-out thermostat is not shown here, but make sure to install one to
protect the low temperature circuit (to be connected to X20 terminal, ref. 14 on Prestige
42-50-75-100-120 Solo wiring diagrams and ref. 15 on Prestige 24-32 Solo/Excellence
wiring diagram).
41


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