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8 Electrical wiring
8.1 General connection and safety
instructions
The units require a protected power supply cable
connected to the outdoor unit and indoor unit, as
well as a four-core control line connected from the
outdoor unit to the indoor unit.
DANGER!
All electrical installation work is to be performed
by specialist companies. Disconnect the power
supply when connecting the electrical terminals.
NOTICE!
All lines are to be spatially separated from each
other. The connection of the communication line
between the indoor unit and outdoor unit must
be established via a shielded wire. The same
applies to the connection of a wired remote
control!
NOTICE!
The electrical connection for the units must be
made at a separate feedpoint with a residual
current device in accordance with local regula-
tions and should be laid out by an electrician.
The units' scope of delivery includes a five metre
long, four-core control line for connecting the
indoor unit to the outdoor unit. The control line to
the outdoor unit contains a data cable which
serves to realise communication between the
indoor unit and the outdoor unit. This is used for
controlling the cooling and heating capacity and for
forwarding alarm codes to the indoor unit. If the
length is insufficient, you can extend the control
lines on the indoor unit.
n W
e recommend installing a main / repair switch
on the building close to the unit. This is the
responsibility of the customer.
n The terminal blocks for establishing the con-
nections are located inside the unit. These can
be accessed after opening the cover.
n If a condensate pump, which is available as an
accessory, is used in conjunction with the unit,
the pump switch-off contact switches off the
power supply to the indoor unit if necessary.
8.2 Unit connection
Make the connection as follows:
1. Open the air inlet grill.
2. Loosen the switch cabinet's cover (
Fig. 18).
3. Feed the de-energised cable through the
edge protection rings on the control box and
clamp the cable in the strain relief.
4. Then connect the cable in accordance with
the connection diagram (see ).
5. Connect the electrical plugs on the cover to
the mating connectors on the cassette. It is
not possible to incorrectly connect these.
6. Mount all removed parts.
Fig. 17: Switch cabinet access
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