50
Isolators for non-earthed conductors
■
The integral ON/OFF switch must simultaneously
isolate all non-earthed conductors from the mains
with a minimum contact separation of 3 mm.
■
We additionally recommend installing an AC/DC-
sensitive RCD (RCD class B
) for DC (fault)
currents that can occur with energy efficient equip-
ment.
■
Select and size residual current devices to
DIN VDE 0100-530.
Danger
Incorrect electrical installations can lead to life
threatening injuries from electrical current and
result in appliance damage.
Connect the power supply and implement all
safety measures (e.g. RCD circuit) in accord-
ance with the following regulations:
■
IEC 60364-4-41
■
VDE regulations
■
TAR medium voltage VDE-AR-N-4110
Danger
The absence of system component earthing can
lead to serious injury from electric current if an
electrical fault occurs.
■
Restore all protective conductor connections
of the heat pump.
■
Heat pump and pipework
must
be grounded
to the equipotential bonding of the building.
Danger
Incorrect core assignment can result in serious
injury and damage to the appliance.
Never interchange cores "L" and "N".
■
Consult your power supply utility, which may offer dif-
ferent supply tariffs for the power circuits.
Observe the technical connection requirements of
the power supply utility.
■
The power-OFF assignment is made via the type of
connection.
In Germany, the power supply can be cut off for up to
3 x 2 hours per day (24 h).
■
The power supply to the control circuit must be
with-
out
interruption by the power supply utility. The con-
trol circuit therefore requires a separate power sup-
ply.
■
A separate power supply for the control circuit
necessitates a change to the internal wiring. This
may only be carried out by an electrician according
to the electrical connection diagram.
■
Protect the power cable to the heat pump control unit
with a fuse of max. 25 A.
Information on the compressor power supply
(power circuit)
■
!
Please note
Incorrect phase sequence can cause damage
to the appliance.
Make the compressor power supply
only
in
the phase sequence specified (see terminals)
with a
clockwise
rotating field.
■
The compressor power fuses must have C charac-
teristics.
Power supply for control circuit (230 V~) and power circuit (400 V~)
Make the connection in accordance with the separate
"Connection and wiring diagram".
Electrical connection requirements
Notes
■
The type and cross-section of connecting cables
must be determined by an authorised electrician in
accordance with the local regulations.
■
The control circuit power supply and the cable for the
power-OFF signal can be combined in a single 5-
core cable.
Cable lengths in the heat pump plus distance to
wall
Control circuit power supply (230 V~ if on
site)
3.3 m
Power circuit power supply (400 V~)
2.3 m
Additional connecting cables
2.3 m
Installation sequence
Power supply
5855865
Installation
Summary of Contents for BW 352.B027
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