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E-5
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7.3
6.4
Electrical Connection
The following electrical connections need to be established on
the heat pump.
Connection of the control line to the control panel of the heat
pump via terminal X1: L/N/PE.
Connection of the mains cable to the control panel of the
heat pump via terminal X5: L1/L2/L3/PE.
Connection of the mains cable of the well pump to the con-
trol panel of the heat pump via terminal X5: L11/L21/L31/PE.
Connection of the well pump (to be provided by the cus-
tomer) to the control panel of the heat pump via terminal X1:
PE and pump contactor K5: 2/4/6.
Ensure that the supply voltage for these terminals cannot be
switched off by the tariff contactor when connecting the mains
cable of the well pump, in order to enable the turn-off delay of the
well pump.
All electrical components required for the operation of the heat
pump are located on the control panel.
For detailed instructions concerning the connection and function-
ing of the heat pump controller (e.g. external wall sensor included
in the scope of supply), refer to the operating manual supplied
with the controller.
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 have to be provided by the customer. The required
conductor cross-section is to be selected according to the power
consumption of the heat pump, the technical connection require-
ments of the respective 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. conduc-
tor cross section of 10 mm
2
.
ATTENTION!
Observe the clockwise rotating field when connecting the mains cable (if
rotating field is not clockwise, the heat pump will not work properly and
will be very noisy).
7 Commissioning
7.1
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).
7.2
Preparation
The following items need to be checked prior to start-up:
The heat pump must be fully connected, as described in
Chapter 6.
The heat source system and the heating circuit must have
been filled and checked.
All valves that could impair proper flow in the well 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.
7.3
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.
If an overflow valve is fitted to assure the minimum heating water
flow rate, the valve must be set in accordance with the require-
ments of the respective heating system. Incorrect adjustment
can lead to faulty operation and increased energy consumption.
We recommend carrying out the following procedure to correctly
adjust the overflow valve:
Close all of the heating circuits that may also be closed during
operation (depending on the type of heat pump usage) so that
the most unfavourable operating state - with respect 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.
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.
Heat source
temperature
Max. temperature spread
between heating flow and return
flow
From
To
7° C
12° C
10 K
13° C
18° C
11 K
19° C
25° C
12 K
