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Prestige
CH1 CH1 Low
DHW
DHW
P4
CH
CH
Low
W
2
W
1
LOW T° SCHEMA : 4
System Control - ACVMax: 660Y2800 • B
en
42
EN
FR
NL
ES
IT
DE
PL
RU
PRESET CONFIGURATION 9  SOLO 2 PUMPS
High and low temperature heating circuits, possibly with optional outdoor
temperature sensor and room thermostat, and with DHW circuit.
Pump power is limited in this system configuration, as both pumps (CH1 and CH1Low need to
be connected in parallel. Additionally, a second relay can be used.
Pump Conguration 9
Flex 4
ERR
Flex 6
P4
Flex 3
P3
Flex 2
DHW
Flex 1
CH
Flex 5
Flame
Error CH/DHW Mix open DHW CH1 low Mix close
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 pumps (CH1 + CH1 low temp
circuits)
............. 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
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
Refer to "Accessing the preset configuration page for Solo (2 pumps)" on page 32, to know
how to get to the relevant page of the ACVMax controller.
This configuration is not yet activated
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).
42


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