Unical BCM 2.0 - Page 4

4
1
2
3
Y3
P. Car
.
DHW
P.
CH
230 V
N
L
1
2
3
Y3
COM.
COMAND
P. Car. DHW
COMAND
P. CH
1
2
3
4
Y4
P.
Coll.
230 V
N
L
1
2
3
4
Y4
COMAND
P. Coll.
USC
ALLARM SIGNAL
Y2
12 11 10 98765
43
21
SE
Y2
12 11 10 98765
43
21
P.
Mod.
C.P.M.
230 V
(-) GND
Y2
12 11 10 98765
43
21
Stemp
ACC.
(-) GND
P. CH CONTROL P. Car. CONTROL DHW
USC ALARM SIGNAL P. Coll. CONTROL
Y3 1 COM. Common output
2 P.Car.
DHW
Storage tank loading
pump
3 P. CH Heating pump
Y4 1 2 P.Coll. Manifold pump
3 4
ALARM Alarm output
S.E. = KEY TO WIRING DI-
AGRAM (boiler manual
par. 4.5)