Installation; General; Connection On Heating Side; Electrical Connection - Dimplex LA 35TUR+ Installation And Operating Instructions Manual

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7

Installation

7.1 General

The following connections need to be established on the heat
pump:
Heating system flow and return flow
Hot water circuit flow and return flow
Condensate outflow
Control line to the heat pump manager
Power supply

7.2 Connection on heating side

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 transi-
tions 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,
residue from sealants, etc. Any accumulation of deposits in the
liquefier could cause the heat pump to completely break down.
Once the heat pump has been connected to the heating system,
it must be filled, de-aerated and pressure-tested. We recom-
mend water treatment according to VDI 2035.
Use of the optionally available four-way reversing valve is recom-
mended. A detailed installation description can be found in the in-
structions included in the scope of supply of the valve.
The following is true for heating-only operation of
the heat pump:
If the heat pump is used for heating purposes only, the hydraulic
connections at the liquefier can be connected the opposite way
round. In this case, the attached device label can be ignored.
Connection [A] is connected to the heating flow; connection [B] is
connected to the heating return flow.
Important: The notes/settings in the instructions of the heat
pump manager must always be observed and carried out accord-
ingly; not doing so will lead to malfunctions.
With this type of operation, cooling operation is not possible. The
system can only be operated in heating mode. The performance
ratings are valid as specified in the device information.
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 differential pressure-
less manifold.
Antifreeze
A method of manual drainage (see illustration) should be pro-
vided for heat pumps which are exposed to frost. The antifreeze
function of the heat pump manager is active whenever the man-
ager 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 fail-
ure, 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 cannot be detected
(holiday homes).
EN-6

7.3 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 con-
ductors must be installed in the power supply (tripping current in
compliance with the Device Information). When connecting, en-
sure that the incoming supply has a clockwise rotating field.
Phase sequence: L1, L2, L3.
ATTENTION!
Ensure that there is a clockwise rotating field: With incorrect wiring the
starting of the heat pump is prevented. A corresponding warning is
indicated on the display of the heat pump manager (adjust wiring).
The control voltage is supplied via the heat pump manager.
The heat pump manager has a 230 V AC-50 Hz power supply
and is connected in compliance with its own operating instruc-
tions (16 A fuse).
The control lines (not included in the scope of supply) have rec-
tangular plug connectors on both ends. One end is connected to
the heat pump manager, and the other end is connected to the
switch box in the heat pump. The plug connections to the heat
pump are located on the bottom of the switch box.
Two separate lines are used as control lines. One of the lines is
designed for the 230 V control voltage level, the other for the sig-
nal and/or extra-low voltage level.
More detailed information can be found in the operating instruc-
tions of the heat pump manager.
For detailed information, see circuit diagrams in the Appendix.