3.4 Electrical connection
general notes
n It is necessary to lay a mains cable both to the
outdoor unit and, separately
, to the indoor unit.
n The indoor unit requires a single-phase
230V/1~/50 Hz power supply.
The outdoor units of the WKF 130 Duo require
a 230V/1~/50 Hz power supply.
The outdoor units of the WKF 170 Duo require
a three-phase 400V/3~/50 Hz power supply.
n The electrical connection between outdoor and
indoor units is made using a sheathed two-wire
control line.
n Where applicable, a separate power supply
shall be provided to the indoor unit for the aux-
iliary heater (400V/3~/50Hz).
n Power to the indoor units may not be discon-
nected by the power company when fitted with
an off-period circuit (anti-freeze protection).
n The heat-pump manager needs to know
whether a power-company enable or off-period
is in effect. A potential-free switch for the S16
must be provided by the customer for this pur-
pose. (Contact closed signifies enabled, while
contact open signifies a blocking period).
n Interrupting the power supply (hard shutdown)
of the outdoor unit is advised against.
n A connection schematic along with corre-
sponding circuit diagrams can be found in the
“Electrical layout” and “Circuit plans” chapters
of this manual.
n Special rates for the operation of heat pumps
may be offered by the power utility.
n Ask your local power utility about the details of
any rates that might be available.
DANGER!
All electrical installation work must be done by
an electrician.
WARNING!
Always note the currently applicable VDE
guidelines and the notes in T
AB 2007. The size
and type of the fuse are to be taken from the
technical data.
WARNING!
All cable sizes are to be selected according to
VDE 0100. Special attention should be given to
cable lengths, cable type and the kind of instal-
lation. The information in the connection dia-
gram and in the system overview are to be
seen as an acceptable installation possibility
only in a standard case!
NOTICE!
Make sure to connect the outdoor unit neutral
connector properly, otherwise the varistors on
the line-filter circuit board will be destroyed.
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.
Check all plugged and clamped terminals to
verify that they are seated correctly and make
permanent contact. T
ighten as required.
Further information about the electrical wiring
of the indoor and outdoor units can be found in
the corresponding WKF/WKF compact series
chapters.
REMKO WKF series
32
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