Viessmann VITOCAL 350-A, Installation And Service Instructions Manual

Page: 104 / 256

104
Danger
Incorrectly executed electrical
installations can lead to injury
from electrical current and result
in equipment damage.
Make the power supply connec-
tion and implement all earthing
measures (e.g. RCD circuit) in
accordance with the following
regulations:
■ IEC 60364-4-41
■ VDE requirements
■ Requirements specified by
your local power supply utility
■ Protect the power supply to the
heat pump control unit with
16 A max.
Danger
The absence of component
earthing in the system can lead to
serious injury from electrical cur-
rent if an electrical fault occurs.
The equipment and the pipework
must be connected to the earth
bonding of the house in ques-
tion.
Isolator for non-earthed conductors
■ The main isolator (if installed) must
simultaneously isolate all non-earthed
conductors from the mains with a min-
imum contact separation of 3 mm.
■ If no main isolator is installed, all non-
earthed cables must be isolated from
the mains by the upstream breaker
with at least 3 mm contact separation.
Danger
Incorrect core termination can
cause severe injuries and dam-
age to the equipment.
Never interchange cores "L" and
"N".
Colour coding to DIN/IEC 60757
L BN brown
N BU blue
?
GN/YE green/yellow
Installation sequence
Power supply
5414 828 GB