16
Power supply for accessories at plug
lH
(230 V~)
Where the boiler is installed in a wet area, the power
supply for accessories must not be connected at the
control unit. Subject to the boiler being sited outside
wet rooms, the power supply of accessory components
can be connected at the control unit. This connection
is switched directly with the ON/OFF switch of the con-
trol unit.
If the total system current exceeds 6 A, connect one or
more extensions via an ON/OFF switch directly to the
mains supply (see next chapter).
Connection of accessories
Power supply and KM BUS
Power supply to all accessories via heat source control unit
145 145
40 A 40
145 145
40 A 40
B
C
145
40 96
A
145 145
40 A 40
D
E
Fig. 10
Some accessories with direct power supply
145 145
40 A 40
145 145
40 A 40
B
C
145
40 96
A
145 145
40 A 40
D
E
Fig. 11
A
Heat source control unit
B
Extension kit for heating circuit with mixer M2
C
Extension kit for heating circuit with mixer M3
D
Extension AM1, EA1 and/or solar control module,
type SM1
E
ON/OFF switch
A buffer relay must be fitted if the current flowing to the
connected working parts (e.g. circulation pumps) is
higher than the safety level of the relevant accessory.
Accessories
Internal fuse protec-
tion
Extension kit for heating circuit
with mixer
2 A
Extension AM1
4 A
Extension EA1
2 A
Solar control module, type
SM1
2 A
Installation sequence
Electrical terminals
(cont.)
5772 980 GB
Installation
