Power Supply For Accessories At Plug Lh (230 V~) - Viessmann Vitodens 222-F Installation And Service Instructions For Contractors

Installing the boiler
Electrical connections
Power supply for accessories at plug
Where the boiler is sited in a wet area, accessories
outside the wet area must not be connected to the
mains at the control unit. If the boiler is sited outside
wet rooms, the power supply for accessories can be
connected at the control unit. This connection is
switched directly with the ON/OFF switch of the control
unit.
Power supply to all accessories via heat source control unit
A
E
Fig. 12
Some accessories with direct power supply
A
E
Fig. 13
Heat source control unit
A
Extension kit for heating circuit with mixer M2
B
Extension kit for heating circuit with mixer M3
C
AM1 extension or EA1 extension
D
E ON/OFF switch
If the current flowing to the connected working parts
(e.g. circulation pumps) is higher than the fuse rating
of the relevant accessory, only use the output con-
cerned to control an on-site relay.
20
(cont.)
(230 V~)
lH
B C
B C
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).
D
D
Mains input
fÖ
A Power outlet
fÖ
Power outlet at the control unit
lH
KM BUS connection
aVG
Accessories
Extension kit for heating circuit
with mixer
AM1 extension
EA1 extension
Internal fuse protec-
tion
2 A
4 A
2 A