36
Instructions for the installer
Electrical connections for boilers installed
in a cascade formation
The cable for the connection
between the boiler and the BCM
must have the following
characteristics:
PVC HT CABLE 3x0,5
EBUS UNIT
1
2
3
4
5 6 7 8 9 10 11
1
2
3
Y2
4
5
6
7
Y3
1
2
3
Jp1
1
2
3
Y4
4
DL1 DL2
DL3
1
2
3
Y1
4
5
6
A1
SW1
BCM
SMG
eB
U
S
-
eB
U
S
+
+ 2
4
V
0 1
2
3
45
6
7
8
9
BOILER 1
eBUS +
BOILER 2
BOILER 3
BCM
0 1
2
3
4
56
7
8
9
0 1
2
3
45
6
7
8
9
0 1
2
3
4
56
7
8
9
eBUS -
eBUS +
eBUS +
eBUS -
eBUS -
eBUS +
eBUS -
eB
US
+
eB
US
-
+ 24V
Board selector setting
0 1
2
3
45
6
7
8
9
pos.
BCM
0
Boiler 1 (with eBus UNIT)
0
Boiler 2 (Slave)
1
Boiler 3 (Slave)
2
Boiler 4 (Slave)
3
Boiler 5 (Slave)
4
Boiler 6 (Slave)
5
Boiler 7 (Slave)
6
Boiler 8 (Slave)
7
NERO
(*)
(*)
(*)
remove the
bridge between
contacts
IN and OUT
Y1 terminal
