51
R
BK
+ 20/40Vdc
- 20/40Vdc
D
N
A
M
O
C
.
M
O
C
C
S
U
L
A
N
GI
S
M
R
AL
L
A
G
OL
A
N
A.
R
G
NI
B
su
bd
o
M
A
su
bd
o
M
-
V0
1-
0
BR
C
C
A.
p
met
S
eBUS+
.
R
G
NI
-
V0
1-
0
D
N
G
-S
U
Be
+S
U
Be
0 1
2
3
45
6
7
8
9
Y4
1
2
3
4
1
2
3
.
M.P.
C
H
C.
P
D
N
A
M
O
C
.ll
o
C .
P
1 2 3 4 5 6
Y3
D
N
A
M
O
C
W
H
D.r
a
C .
P
Y2
5
3
4
1
2
12 11 10 9 8 7 6
0 1
2
3
45
6
7
8
9
2 3
1
9
8
10 11 12 13 14
4 5 6 7
Jp2
SE
Y1
IG
BR
BL
BR
BL
TLG
(*)
LTLG
BK
BL
BR
R
F 6.3A
BK
OR
BL
BL
BR
BR
BK
BK
BL
BR
YG
G
Y
50 Hz
230 V
L
B
R
B
G
Y
L
B
R
B
G
Y
VM (A)
L
B
R
B
1° Mod.
1° Mod.
WH
VM
(R)
E. RIL. 1
1
BK
BL
BR
OR
BR
WH
WH
WH
WH
WH
R
R
WH
BR
L BL
L BL
L BL
PF
L BL
SR
SR R
R
S 1
PF
L
T 1
TL
0
1
2 3 4
5
6
78
9
WH
YG
BR
MOD. 1
(POS . 0)
0
1
2 3 4
5
6
78
9
MOD. 2
(POS . 1)
0
1
2 3 4
5
6
78
9
MOD. 3
(POS . 2)
BL
YG
BR
PK
GR
BL
BR
YG
YG
BL
BR
K
P
G
alla / to
alim. / supply (50)
A3
12
3
4
5
6
7
A2 A1
A4 A3
Y2
Y1
Y3
D
N
G
12
12
3
3
1
4
2
A3
R
V4
2+
-
S
U
Be
K
B
+
S
U
Be
R
B
3
al / to
HSCP
1
4
2
PK eBUS-
GR eBUS+
alla / to
BMM
(Y1)
1 MOD.
BR
BL
Y
min.
BMM
50
E
K
B
BK
V4
2+
-
S
U
Be
+
S
U
Be
R
B
K
B R
alla / to
BCM
(Y1)
Instructions for the installer
4.3 PRACTICAL CONNECTION DIAGRAM
KEY
E. ACC. Ignition electrode
E. RIL.
Detection electrode
HSCP
Th
ermoregulation
SR
Heating sensor (only 1° module)
SR 1÷7
Local heating sensor
PF
Flue pressure switch (only 1° module)
PF min
Minim
um fl
ue pressure switch (only 1°
module)
SL
Condensate level sensor (2° module)
T. ACC. Ignition transformer
TL
Safety thermostat
TL 1÷7
Local Safety thermostat
VG
Gas valve
VM (A) Modulating fan power supply
VM (R)
Modulating fan adjustment/Det.
SRR
Global return sensor
BCM
SMG
Globa
l flo
w sensor
S. temp.
ACC.
Storage tank temperature sensor
SE
Outdoor temperature sensor
