Power Supply For Accessories At Plug Lh (230 V ~) - Viessmann Vitoladens 300-W Installation And Service Instructions For Contractors

Electrical connections
Power supply for accessories at plug
Where the boiler is sited in a wet room, accessories
outside the wet area must not be connected to the
power supply at the control unit. If the boiler is not
sited in a wet room, the power supply for accessories
can be connected at the control unit. This connection
is switched directly with the ON/OFF switch of the con-
trol unit.
Power supply and KM BUS connection of accessories
Power supply to all accessories via heat source control unit
A
E
Fig. 9
Some accessories with direct power supply
A
E
Fig. 10
Heat source control unit
A
Extension kit for heating circuit with mixer M2
B
Extension kit for heating circuit with mixer M3
C
D AM1 extension, EA1 extension and/or solar con-
trol module, type SM1
If the current flowing to the connected working parts
(e.g. circulation pumps) is higher than the fuse rating
of the respective accessory: Only use the output con-
cerned to control an on-site relay.
(cont.)
(230 V ~)
lH
B C
B C
If the total system current exceeds 6 A, connect one or
more extensions directly to the mains supply via an
ON/OFF switch (see next chapter).
D
D
ON/OFF switch
E
Mains input
fÖ
A Power outlet
fÖ
lH Control unit power outlet
KM BUS connection
aVG
Accessories
Extension kit for heating circuit
with mixer
AM1 extension
EA1 extension
Solar control module, type
SM1
Installation sequence
Internal fuse protec-
tion
2 A
4 A
2 A
2 A
17