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7.4 Electrical Connection
The following electrical connections need to be established on
the heat pump.
Connection of the mains cable to the control panel of the
heat pump via terminal X1: L/N/PE.
Connection of the control voltage cable to the control panel
of the heat pump via terminal X1:
L/N/PE.
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 terminal diagram and the operating manual supplied with the
controller.
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 have to be provided by the customer. The re-
quired conductor cross-section is to be selected according to the
power consumption of the heat pump, the technical connection
requirements of the relevant electrical utility company as well as
all applicable 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.
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 authorized by the
manufacturer. Only then can an extended warranty period of
3 years in total be granted (see Warranty Service).
8.2 Preparation
The following items need to be checked prior to start-up:
All of the heat pump connections must be established as de-
scribed 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.
The condensate outflow must not be impaired.
The outflows of the brine and heating water pressure relief
valves must not be impaired.
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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
Max. temperature spread
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.
flow
10 K
11 K
12 K
13 K
14 K
15 K
E-5
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