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DHW
P4
Prestige
CH
Low
W
2
W
1
LOW T° SCHEMA : 2
en
41
System Control - ACVMax: 660Y2800 • C
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
AC
V M
ax
1
2
3
4
5
6
1
2
3
4
5
6
W
W
W
W
W
W
4
5
6
1
2
3
1
2
3
4
6
X
15
1
2
3
4
5
6
7
8
9
10
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
X
11
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
X
16
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
4
2
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
3
1
14
12
13
X
12
X9
P
14
1
2
3
4
1
2
3
4
5
6
B
V
B
W
P
13
B
Or
1
2
3
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
1
2
3
5
F0
0
X
10
0
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
X
101
18
17
20
19
21
24
4
X
10
1
2
X20
1625
2
1
1
NTC 5
9
2
1
1
NTC 2
10
2
1
1
NTC 1
11
1
2
3
1
2
1
2
3
4
1
2
3
4
5
6
X7
X4
X6
X5
Bus A
Bus - Gr
ound
Bus B
0-1
0
Volt - Gr
ound
0-1
0
Volt - Input
Cascade sensor - Gr
ound
Cascade sensor - Input
NTC 3
NTC 4
1
2
22
23
26
X
18
V
W
B
W
B
B
9
10
11
12
13
14
15
16
16
15
14
13
12
11
10
9
X
10
0
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
1
2
3
4
5
6
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
4
2 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
3
1
14
12
13
X12
X9
P14
1
2
3
4
1
2
3
4
5
6
B
V
B
W
P13
B
Or
1
2
3
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
1
2
3
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
1
2
X20
16
25
2 1
1
NTC 5
9
2 1
1
NTC 2
10
2 1
1
NTC 1
11
1
2
3
1
2
1
2
3
4
1
2
3
4
5
6
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
5A
T F
use
5A
T F
use
5A
T F
use
............. DHW sensor (NTC3)
............. Optional outdoor temp. sensor (NTC4)
............. Optional room thermostat 1
............. Optional room thermostat 2
AC
V M
ax
1
2
3
4
5
6
1
2
3
4
5
6
W
W
W
W
W
W
4
5
6
1
2
3
1
2
3
4
6
X
15
1
2
3
4
5
6
7
8
9
10
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
X
11
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
X
16
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
4
2
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
3
1
14
12
13
X
12
X9
P
14
1
2
3
4
1
2
3
4
5
6
B
V
B
W
P
13
B
Or
1
2
3
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
1
2
3
5
F0
0
X
10
0
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
X
101
18
17
20
19
21
24
4
X
10
1
2
X20
1625
2
1
1
NTC 5
9
2
1
1
NTC 2
10
2
1
1
NTC 1
11
1
2
3
1
2
1
2
3
4
1
2
3
4
5
6
X7
X4
X6
X5
Bus A
Bus - Gr
ound
Bus B
0-1
0
Volt - Gr
ound
0-1
0
Volt - Input
Cascade sensor - Gr
ound
Cascade sensor - Input
NTC 3
NTC 4
1
2
22
23
26
X
18
V
W
B
W
B
B
9
10
11
12
13
14
15
16
16
15
14
13
12
11
10
9
X
10
0
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. 13 on Prestige
42-50-75-100-120 Solo wiring diagrams and ref. 14 on Prestige 24-32 Solo/Excellence
wiring diagram).