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7.4 Electrical Connection
The following electrical connections must 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 brine circulating pump (to be provided by
the customer) to the control panel of the heat pump via ter-
minal X1: PE and pump contactor K2: 2/4/6 (WPS 50I -
WPS 160I), or motor protection F7: 2/4/6 (WPS 210I).
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 refer to the operating manual sup-
plied 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 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 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 mm².
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).
8
Commissioning
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).
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.
The dirt trap 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.
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.
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.
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.
8.3
Max. temperature spread
flow
10 K
11 K
12 K
13 K
14 K
15 K
E-5
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