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7.4
7.4 Electrical Connection
The following electrical connections need to be established on
the heat pump.
The mains cable must be connected to the control panel of
the heat pump.
The control voltage cable must be connected to the control
panel of the heat pump.
All electrical components required for the operation of the heat
pump are located on the control panel.
For detailed instructions on how to connect the external compo-
nents and how the heat pump controller functions, please refer to
the device connection diagram and the operating manual sup-
plied with the controller.
The mains cable is connected via the terminals X1: L1/L2/L3/PE
on the control panel.
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 have to be provided by the customer. The required con-
ductor cross section is to be selected according to the power
consumption of the heat pump, the technical connection require-
ments of the relevant electrical utility company as well as all ap-
plicable regulations. Details on the power consumption of the
heat pump are listed on both the product information sheet and
the type plate. The connection terminals are designed for a max.
conductor cross section of 10 mm².
ATTENTION!
Observe the clockwise rotating field when connecting the electrical
mains cable (if rotating field is not clockwise, the heat pump will not work
properly and will be very noisy).
Connection of the control voltage via terminals X1:L/N/PE.
If a brine pump is required which is more powerful than the inte-
gral brine pump, a motor contactor and a corresponding motor
circuit breaker must be installed. In such cases, the contactor is
to be connected to the terminals for the internal brine pump (con-
troller terminals J12/N03 and X1-N). The larger pump must then
be supplied by the supply network.
8
Start-up
8.1 General Information
To ensure that start-up is performed correctly, it should only be
carried out by an after-sales service technician authorised by the
manufacturer. This may be a condition for extending the guaran-
tee (see Warranty Service).
E-6
8.2 Preparation
The following items need to be checked prior to start-up:
The heat pump must be fully connected, as described in
Chapter 7.
The heat source system and the heating circuit must have
been filled and checked.
Dirt traps and breathers must be inserted in the brine inlet of
the heat pump.
All valves that could impair proper flow in the brine and heat-
ing circuits must be open.
The heat pump controller must be adapted to the heating
system in accordance with the controller's operating instruc-
tions.
Ensure the condensate outflow functions.
The outflows of the brine and heating water pressure relief
valves must not be impaired.
8.3 Start-up Procedure
The heat pump is started up via the heat pump controller.
ATTENTION!
The heat pump must be started up in accordance with the installation and
operating instructions of the heat pump controller.
The performance level of the circulating pump must be adapted
to the respective heating system.
The overflow valve must be adjusted to the requirements of the
respective heating system. Incorrect adjustment can lead to
faulty operation and increased energy consumption. We recom-
mend carrying out the following procedure to correctly adjust the
overflow valve:
Close all of the heating circuits that may also be closed during
operation so that the most unfavourable operating state - with re-
spect to the water flow rate - is achieved. This normally means
the heating circuits of the rooms on the south and west sides of
the building. At least one heating circuit must remain open (e.g.
bathroom).
The overflow valve should be opened far enough to produce the
maximum temperature spread between the heating flow and re-
turn flow listed in the table below for the current heat source tem-
perature. The temperature spread should be measured as close
as possible to the heat pump. The heating element of mono en-
ergy systems should be disconnected.
Heat source
temperature
between heating flow and return
From
To
-5° C
0° C
1° C
5° C
6° C
9° C
10° C
14° C
15° C
20° C
21° C
25° C
Any faults occurring during operation are displayed on the heat
pump controller and can be corrected as described in the operat-
ing manual of the heat pump controller.
Max. temperature spread
flow
10 K
11 K
12 K
13 K
14 K
15 K
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