27
27
27
27
20
20
20
20
ELECTRICAL CONNECTIO
ELECTRICAL CONNECTIO
ELECTRICAL CONNECTIO
ELECTRICAL CONNECTION DIAGRAM
N DIAGRAM
N DIAGRAM
N DIAGRAM
There are a series of removable connectors located on the rear of the control panel, for connecting the
various options and components for this model. For correct connection, carefully follow the
indications shown below:
1
11
1
8
88
8
6
66
6
5
55
5
4
44
4
3
33
3
N
N
N
N
N
N
N
N
N
N
N
N
7
77
7
J1
J1
J1
J1
J2
J2
J2
J2
J4
J4
J4
J4
N
N
N
N
L
LL
L
Q
Q
Q
Q
J5
J5
J5
J5
TA
TA
TA
TA
1
11
1
E20
E20
E20
E20
BV
BV
BV
BV
2
22
2
220 V
220 V
220 V
220 V
J7
J7
J7
J7
TA
TA
TA
TA
2
22
2
bc7
bc7
bc7
bc7
B
la
ck
B
lu
e
B
lu
e
B
lu
e
B
ro
w
n
BC
BC
BC
BC
2
22
2
BC
BC
BC
BC
1
11
1
J6
19
19
19
19
18
18
18
18
17
17
17
17
16
16
16
16
15
15
15
15
J3
J3
J3
J3
PWM
PWM
PWM
PWM
c
cc
c
B
lu
e
1
11
14
44
4
13
13
13
13
12
12
12
12
9
99
9
Ra
Rr
Sc
Sc
Sc
Sc
B
lu
e
ATTENTION
ATTENTION
ATTENTION
ATTENTION
TA
TA
TA
TA
1
11
1
and TA
and TA
and TA
and TA
2
22
2
should be two
should be two
should be two
should be two
wire
wire
wire
wire VOL
VOL
VOL
VOLT FREE
T FREE
T FREE
T FREE ro
ro
ro
room stat
om stat
om stat
om stat....
LLLL::::
Line.
N:
N:
N:
N:
Neutral.
bc7:
bc7:
bc7:
bc7:
Burner terminal n. 7.
Q:
Q:
Q:
Q:
Burner.
BV:
BV:
BV:
BV:
DHW charge pump.
BC
BC
BC
BC
1
11
1
::::
Heating circuit N. 1 circulating pump.
BC
BC
BC
BC
2
22
2
::::
Heating circuit N. 2 circulating pump.
E20:
E20:
E20:
E20:
Remote control E20 (optional).
TA
TA
TA
TA
1
11
1
::::
Heating circuit N. 1 room thermostat.
(Two wire VOLT FREE room stat)
(Two wire VOLT FREE room stat)
(Two wire VOLT FREE room stat)
(Two wire VOLT FREE room stat)
TA
TA
TA
TA
2
22
2
::::
Heating circuit N. 2 room thermostat.
(Two wire VOLT FREE room stat)
(Two wire VOLT FREE room stat)
(Two wire VOLT FREE room stat)
(Two wire VOLT FREE room stat)
PWM
PWM
PWM
PWM
cccc
::::
Heating PWM cable.
Ra:
Ra:
Ra:
Ra:
Storage tank option resistance.
R
R
R
Rrrrr::::
Resistance 4k7.
Sc
Sc
Sc
Sc::::
Boiler temperature sensor.
J1:
J1:
J1:
J1:
Power supply connector.
J2:
J2:
J2:
J2:
Components connector.
J3:
J3:
J3:
J3:
Sensor connector.
J4:
J4:
J4:
J4:
Remote control connector.
J5:
J5:
J5:
J5:
Room thermostat N. 1 connector.
J6:
J6:
J6:
J6:
Telephone relay connector.
J7:
J7:
J7:
J7:
Room thermostat N. 2 connector.