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

Installation sequence
Electrical connections

Connection accessories

Accessory installation instructions
When connecting a Vitotrol 100 or an OpenTherm
remote control, remove the jumper across L and 1.
Outside temperature sensor (accessories)
1. Fit the outside temperature sensor.
Installation location:
■ 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 vents
■
Not immediately below balconies or gutters
■
■ Never render over
■ Connection:
2-core lead, length up to 35 m with a cross-sec-
tion of 1.5 mm 2

Power supply

Regulations and directives
Danger
Incorrectly executed electrical installations can
result in injuries from electrical current and dam-
age to the appliance.
Connect the power supply and implement all
safety measures (e.g. RCD circuit) in accord-
ance with the following regulations:
■ IEC 60364-4-41
IEEE Wiring Regulations
■
Connection requirements specified by your
■
local power supply utility
■ Route extra low voltage (ELV) leads < 42 V
and 42 V/230 V~ cables separately.
>
■ Strip as little of the insulation is possible,
directly before the terminals, and bundle tightly
to the corresponding terminals.
Secure cables with cable ties.
■
16
(cont.)
2. Connect the outside temperature sensor to the
connecting cable across terminals 3 and 4 (see
page 15).
Install an isolator in the power cable that simultane-
ously isolates all non-earthed conductors from the
power supply with at least 3 mm contact separation.
We also recommend installing an AC/DC-sensitive
RCD (RCD class B
can occur with energy efficient equipment.
Protect the power cable with an external 3 A fuse to
BS 1362.
Danger
Incorrect core assignment can result in serious
injury and damage to the appliance.
Take care not to interchange wires "L1" and "N".
Danger
The absence of component earthing for the sys-
tem can lead to serious injury from electric cur-
rent if an electrical fault occurs.
The appliance and pipework must be connected
to the equipotential bonding of the building.
) for DC (fault) currents that