Viessmann VITODENS 100-W Installation And Service Instructions Manual page 17

Electrical connections
Cable entry
B
A Power cable, remote control con-
necting cable
B LV leads (sensor leads)
Power supply
Regulations and Directives
Danger
Incorrect electrical installations
can result in injuries from electri-
cal current and in appliance dam-
age.
Connect the power supply and
implement all safety measures
(e.g. RCD circuit) in accordance
with the following regulations:
■ IEC 60364-4-41
■ VDE regulations [IEE or local
regulations]
■ Connection requirements
specified by your local power
supply utility
(cont.)
A
Install an isolator in the power supply line
that simultaneously isolates all non-
earthed conductors from the mains with
at least 3 mm contact separation.
We additionally recommend installing an
AC/DC-sensitive RCD (RCD class B
occur with energy efficient equipment.
Protect the power cable with an external
3 A fuse to BS 1362.
Installation sequence
) for DC (fault) currents that can
Danger
Incorrect core allocation can
result in serious injury and dam-
age to the appliance.
Take care not to interchange
wires "L1" and "N".
17