Installation Manual

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5350 485 GB 08/2007
Electrical connections
Electrical Connections
Both combination and system boilers
require a permanent live 240V supply.
Combination boiler: Room temperature
control is achieved by connecting a
switched live 240V supply to the boiler.
System boiler: For Y & S Plan systems
a switched live 240V supply is required
to be connected to the boiler. A Viessmann
cylinder sensor is a thermistor and is
connected directly to the boiler. Room
temperature control is achieved by
connecting a 240V switched live supply
to the boiler.
External controls
To ensure optimum performance,
Viessmann offer a range of external
controls (i.e. weather compensation
Vitotronic 200). However the appliance
may be used with any certified 240V
room thermostat.
Internal controls
The Vitodens 200-W is supplied fitted with
an internal Vitotronic HC2 7 Day controller
for CH and DHW on both the combination
and system boiler models.
Vitoden 200-W installation 4/9/07 7:27 pm Page 28