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6
Installation
6.1 General
The following connections need to be established on the heat
pump:
Flow and return flow of the heating system
Condensate drain
Control line to the heat pump controller
Power supply
6.2 Heating system connection
The heating system connections on the heat pump have a 1 1/2"
external thread. Route the connection hoses out of the device in
a downwards direction. Use a spanner to firmly grip the transiti-
ons when connecting the heat pump.
Before connecting the heating water system to the heat pump,
the heating system must be flushed to remove any impurities, re-
sidue from sealants, etc. Any accumulation of deposits in the li-
quefier could cause the heat pump to completely break down.
Once the heating system has been installed, it must be filled, de-
aerated and pressure-tested.
Minimum heating water flow
The minimum heating water flow through the heat pump must be
assured in all operating states of the heating system. This can be
accomplished, for example, by installing a manifold without diffe-
rential pressure.
Antifreeze
A method of manual drainage (see illustration) should be provi-
ded for heat pumps which are exposed to frost. The antifreeze
function of the heat pump controller is active whenever the cont-
roller and the heat circulating pump are ready for operation. If the
heat pump is taken out of service or in the event of a power fai-
lure, the system has to be drained. The heating circuit should be
operated with a suitable antifreeze if heat pump systems are im-
plemented in buildings where a power failure can not be detected
(holiday home).
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6.3 Electrical Connection
A standard four-core cable is used for connecting the heat pump
to the power supply.
The cable must be provided by the customer. The conductor
cross section is selected in accordance with the power consump-
tion of the heat pump (see Appendix Device Information) and the
applicable VDE (EN) and VNB regulations.
An all-pole disconnecting device with a contact gap of at least
3 mm (e.g. utility blocking contactor or power contactor) as well
as a 3-pole circuit breaker with common tripping for all external
conductors must be installed in the power supply (tripping current
in compliance with the Device Information). When connecting,
ensure that the incoming supply has a clockwise rotating field.
Phase sequence: L1, L2, L3.
ATTENTION!
Ensure that there is a clockwise rotating field: Operating the compressor
in the wrong rotational direction could cause damage to the compressor.
The control voltage is supplied via the heat pump controller.
The heat pump controller has a 230 V AC-50 Hz power supply.
Connect the controller in compliance with its own operating in-
structions (16 A fuse).
The control line (not included in scope of supply) is connected to
the heat pump controller using the two rectangular plug connec-
tors. Use the plug connector located on the base of the heat
pump adjacent to the cable gland in the base plate. More de-
tailed information can be found in the operating instructions of
the heat pump controller.
For detailed information, see Circuit Diagrams in the Appendix.
6.3
E-5
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