Power Supply - Viessmann VITODENS 111-W Installation And Service Instructions Manual

Installation sequence
Electrical connections
Installation site:
■ North or north-westerly wall, 2 to
2.5 m above ground level; in multi
storey buildings, in the upper half of
the second floor
■ Not above windows, doors or ven-
tilation outlets
■ Not immediately below balconies
or gutters
■ Never render over
■ Connection:
Two-core lead, length max. 35 m
with a cross-section of 1.5 mm

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
■ IEEE Wiring Regulations
■ Connection requirements
specified by your local power
supply utility
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.
18
(cont.)
2. Plug the power cable supplied with
the outside temperature sensor into
slot "X21".
3. Connect the outside temperature
sensor to terminals 3 and 4 (see
page 17).
2
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.
) 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".
Danger
The absence of component
earthing in the system can lead to
serious injury from electrical cur-
rent if an electrical fault occurs.
Connect the appliance and pipe-
work to the equipotential bonding
of the building in question.