Power Supply - Viessmann VITOCAL 300-A Installation And Service Instructions Manual

Power supply

Danger
Incorrectly executed electrical
installations can lead to injury
through the transmission of
dangerous body currents and
result in equipment damage.
Carry out the power supply
connection and all earthing
measures (e.g. RCD circuit) in
accordance with IEC 364, the
requirements of your local
power supply utility, VDE or
local and national regulations.
Main isolator requirements (if installed)
If a main isolator is set, it must isolate
the power circuit with at least 3 mm
contact separation.
General information regarding the power supply connection
The power supply connection is sepa-
rated into three areas with three
power supply cables:
Installation sequence
Danger
The absence of component
earthing can transfer danger-
ous body currents, should an
electrical fault occur.
The appliance and the pipe-
work must be connected to the
earth bonding of the house in
question.
If no main isolator is set, all non-
earthed cables must be isolated by
the upstream MCB with at least 3 mm
contact separation.
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