52
Isolators for non-earthed conductors
■
Install an isolator in the power cable to provide
omnipolar separation from the mains for all active
conductors, corresponding to overvoltage category
III (3 mm) for full isolation. This isolator must be fitted
in the permanent electrical installation in line with
installation requirements, e.g. mains isolator or
upstream circuit breaker.
■
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 seri-
ous injury 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 low voltage VDE-AR-N-4100
Danger
The absence of system component earthing can
lead to serious injury from electrical current and
component damage in the event of an electrical
fault.
The appliance and pipework must be connected
to the equipotential bonding of the building.
Danger
Incorrect core assignment can lead to serious
injury from electrical current and result in appli-
ance damage.
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 conditions of the
power supply utility.
■
For accessories and external components that will
not be connected to the heat pump control unit, pro-
vide the power supply via the same MCB/fuse, or at
least on the same phase, as the heat pump control
unit.
Connection to the same MCB/fuse provides addi-
tional safety in the event of the power being switched
off. Observe the power consumption of the connec-
ted consumers.
■
If the power supply to the appliance is connected
with a flexible cable, ensure that the live conductors
are pulled taut before the earth conductor in the
event of strain relief failure. The length of the earth
conductor wire will depend on the design.
Notes on connecting the power-OFF signal
■
If the compressor and/or instantaneous heating
water heater are operated at an economy tariff
(power-OFF), either provide an additional cable (e.g.
3 x 1.5 mm
2
) for the power-OFF signal from the dis-
tribution board (meter box) to the heat pump control
unit.
Or
Combine the cables for the power-OFF signal and
for the heat pump control unit power supply
(3 x 1.5 mm
2
) in a 5-core cable.
■
The assignment of the power-OFF (for compressor
and/or instantaneous heating water heater) is made
via the type of connection and by setting parameters
in the heat pump control unit.
In Germany, the power supply can be cut for a maxi-
mum of 3 x 2 hours per day (24 h).
■
The heat pump control unit/PCB must be supplied
without power-OFF. Tariffs subject to possible shut-
down must not be used here.
■
When using power generated on site (use of power
generated by the photovoltaic system to meet own
requirements):
During the power-OFF period, it is not possible to
operate the compressor utilising power generated on
site.
■
Protect the power cable to the heat pump control unit
with a fuse of max. 16 A.
Installation sequence
Power supply
6199585
Installation
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