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Electrical connection
mented in the switch cabinet of
the unit.
The lines to be laid are intro-
duced into the switch cabinet
through the provided cable
bushings of the unit.
The dimensioning and selection
of the fuse protection and line
cross-sections to be laid must
be performed by an expert.
Please observe the possible
residual currents with up to 10
times the nominal current.
The following electrical connec-
tions
must be established:
Connection of the power sup-
ply
Possible connection of an
enabling contact for stopped
operation or standby
Possible connection of an
operating mode contact for
cooling or heating mode (only
units with heat pump function)
Possible connection of a
collective fault message
notification function
Possible connection of a cir-
culation pump (only KWG..P,
KWP..P)
Possible connection of a crank-
case heater (accessory)
Possible connection of a winter
fan control (accessory)
Possible connection of a cabled
remote control (accessory)
Possible connection of an anti-
frost protection medium heater
(accessory, installation only at
the factory)
Voltage supply
The unit requires a permanently
installed three-phase current con-
nection. The mains supply line
must be connected to the L1, L2,
L3, and PE terminals.
All electrical installations
must be implemented by
specialist companies. The
electrical connections must
be mounted when the system
is de-energised.
ATTENTION
The power supply takes place
on the chiller; a control line to
the indoor unit is not required.
An all-pole, disconnecting
switch must be installed in
the supply line upstream of
the unit. This switch reacts in
case of a failure of individual
external conductors.
The electrical connections
must be designed as fixed
connections according to the
applicable regulations.
Check all terminal points for
tightness.
The supply line must be suf-
ficiently fuse-protected on site
and the voltage loss must not
exceed the permissible values.
Make sure that the electrical
system is suitable for providing
the operating current required
to operate the unit and supply
other units that are already in
operation.
Before installation, check the
connection to already existing
system parts as to whether
the supply line of the unit is
sufficiently dimensioned for the
connected load of the unit.
The unit must always be
connected using sufficiently
dimensioned - multiple, if
necessary - low-impedance
protective earthing conductors
(especially for plastic pipes).
During the installation of the
units onto flat roofs, lightning
protection measures might be
necessary.
All electrical connections, such
as the mains supply, cabled
remote control, etc., are imple-
We recommend that you fuse-pro-
tect the unit with safety fuses.
NOTE
All electrical plug and terminal
connections must be checked
for a firm seat and permanent
contact and retightened if
necessary.
ATTENTION
For connection, procedure as fol-
lows:
1. Open the control panel and
cover of the switch cabinet
by removing the fastening
screws and covers.
2. Conduct the de-energised lines
through the openings in the
switch cabinet and engage the
line in the tension relief.
3. Then connect the line according
to the connection diagram.
4. Make sure the rotating field is
correct.
5. Mount all dismantled parts.
6 TERMINAL connections
31
31


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