Technical data

Electrical Installation 6.4
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6 Electrical Installation
6.1 Power supply
Depending on the technical data of the device, the power supply
of the heat pump is 230VAC/50Hz or 3-L/NPE 400VAC.
A standard 3-core cable is used for single-phase devices (230 V
AC). A 3-core cable is used as load connection for the heat pump
(terminal strip X3) and the electrical supplementary heating (2nd
heat generator) for air-to-water heat pumps is connected with a
second 3-core cable. Depending on the required output of the
supplementary heating, the bridges A7.1 for 4 kW and A7.2 for 6
kW must still be put in place.
A standard 5-core cable must be used for 3-phase devices (400
V AC) for the load connection (terminal strip X1). For air-to-water
heat pumps, the electrical supplementary heating (2nd heat
generator) is also supplied via this load connection. If the entire
6 kW output of the supplementary heating is not needed, the
respective contacts between K20 and B5/F17 can be interrupted.
ATTENTION!
According to the respective regulations typical in a given country, a
disconnecting device with a contact gap of at least 3 mm (e.g. utility
blocking contactor or power contactor) as well as a 1-pole circuit breaker
must be installed in the power supply of the heat pump (tripping current
in compliance with the device information).
NOTE
Ensure that there is a clockwise rotating field (for multiphase devices):
Operating the compressor in the wrong rotational direction could cause
damage to the compressor. Incorrect phase sequence causes wrong
rotational direction of the ventilator and, thus, a significantly reduced
performance.
6.2 Connection of remote controller (only air-to-water heat pumps)
The control voltage for the remote controller is primarily 230 V
AC (except for N10/8/8) and is ensured by the heat pump. The
connecting cable (control line) from the remote control to the heat
pump must be provided externally and must be suitable for a
230 V AC supply voltage. The cable must have at least 6 cores
with a single-core cross section of at least 0.5 mm². The
individual outputs (remote controller N10) and inputs (heat pump
X2) must be connected according to the circuit diagram.
6.3 Hot water preparation connection
The hot water preparation consists of a thermostat in the warm
water cylinder and a 3-way reversing valve. These components
are to be combined in the hot water switching assembly as N13
in the circuit diagrams and switched accordingly. The 230 V AC
power supply of this switching assembly has to be done as
shown in the circuit diagrams. The output, i.e. the signal, of this
switching assembly is then connected to the terminal strip X2/7.
6.4 Dew point monitoring connection
See accessories "7.5.2 Dew Point Monitoring in Cooling
Operation"