36
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.
■
If the compressor and/or instantaneous heating
water heater (if installed) are operated at an econ-
omy tariff (power-OFF), provide an additional cable
(e.g. 3 x 1.5 mm
2
) for the power-OFF signal from the
distribution board (meter box) to the heat pump con-
trol 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 power-OFF (for compressor and/or instantane-
ous heating water heater) is assigned via the type of
connection and via parameter settings 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 PV system to meet own require-
ments):
During the power-OFF period, it is
not
possible to
operate the compressor with power generated on
site.
■
Protect the power cable for the heat pump control
unit with an MCB/fuse of max. 16 A.
■
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 when the power is switched off.
Observe the power consumption of the connected
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.
Information regarding the compressor power sup-
ply
■
!
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.
■
Characteristics of the compressor power MCBs: See
"Specification".
Heat pump control unit power supply 230 V~
L1
X3.18
N
X2.1
?
X1.1
A
1/N/PE
230 V/50 Hz
max.16 A
Fig. 22
A
Mains terminals inside the heat pump control unit
Note
This supply must
never
be blocked.
■
Max. fuse rating 16 A
■
Standard tariff: No economy tariff with power-OFF
possible for the heat pump control unit
■
Recommended power cable:
3 x 1.5 mm
2
■
Recommended power cable with power-OFF for
compressor/instantaneous heating water heater:
5 x 1.5 mm
2
Installation sequence
Power supply
(cont.)
5855006
Installation
