Power Supply - Viessmann Vitocal 300-G 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 (i.e fault current cir-
cuit) in accordance with
IEC 364, the requirements of
your local power supply utility,
VDE or local and national regu-
lations.
Main isolator requirements (if necessary)
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
The power supply is separated into 3
areas:
Installation sequence
If no main isolator is set, all non-
earthed cables must be isolated by
the upstream MCB with at least 3 mm
contact separation.
Control unit power supply (electro-
nics)
Heat pump compressor power sup-
ply (main power circuit)
Instantaneous heating water heater
power supply (accessory, main
power circuit)
Note
Protect the power cable to the con-
trol unit with a fuse of max. 16 A.
The mains fuses for the compressor
must have Z characteristics, if a full
wave soft starter is installed (see
type plate or specification from
page 208).
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