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7.3 Electrical connection
A standard five-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
conductors must be installed in the power supply (tripping current
in compliance with the device information).
The relevant components in the heat pump contain an internal
overload protection.
When connecting, ensure that the incoming supply has a clock-
wise rotating field.
Phase sequence: L1, L2, L3.
ATTENTION!
Ensure the rotary field is clockwise when connecting the mains cables (if
the rotary field is not clockwise, the heat pump will not work properly, is
very loud and may cause damage to the compressor).
The control voltage is supplied via the heat pump manager.
A 3-pole line must be laid for this in accordance with the
electrical documentation. Further information on the wiring
of the heat pump manager is available in the heat pump
manager operating instructions.
A shielded communication line (J-Y(ST)Y ..LG) (not included
in the scope of supply) connects the heat pump manager
with the WPIO controller installed in the heat pump. More
detailed instructions can be found in the heat pump manager
operating instructions and in the electrical documentation.
ATTENTION!
The communication cable is necessary for the function of air-to-water
heat pumps in outdoor installation. It must be shielded and laid
separately from the mains cable
7.3.1 Demand sensor connection
The demand sensor R2.2 is included with the heat pump man-
ager. It must be connected (Cap. 3.2 on page VIII).
NOTE
The return sensor R2 installed in the heat pump is active when the
compressor is running and must not be disconnected
EN-8
8
Commissioning
8.1 General
To ensure that commissioning is performed correctly, it should
only be carried out by an after-sales service technician author-
ised by the manufacturer. This may be a condition for an addi-
tional warranty (see "Warranty service").
8.2 Preparation
The following items must be checked prior to commissioning:
All of the heat pump connections must be installed as de-
scribed in Chapter 7.
All valves which could impair the proper flow of the heating
water in the heating circuit must be open.
The air intake and air outlet paths must be clear.
The fan must turn in the direction indicated by the arrow.
The settings of the heat pump manager must be adapted to
the heating system in accordance with the latter's operating
instructions.
Ensure that the condensate drain functions properly.
8.3 Procedure
The heat pump is commissioned via the heat pump manager.
Settings should be made in compliance with the HPM's instruc-
tions.
At heating water temperatures below 7 °C, commissioning is not
possible. The water in the buffer tank must be heated with the
second heat generator to at least 18 °C.
To ensure problem-free commissioning, the following procedure
is to be implemented:
1)
Close all consumer circuits.
2)
Ensure that the heat pump has the correct water flow.
3)
Use the manager to select the automatic operating mode.
4)
In the special functions menu, start the "Commissioning"
program.
5)
Wait until a return temperature of at least 25 °C has been
reached.
6)
Now slowly reopen the heating circuit valves in succession
so that the heating water flow rate is constantly raised by
slightly opening the respective heating circuit. The heating
water temperature in the buffer tank must not be allowed to
drop below 20 °C during this process. This ensures that the
heat pump can be defrosted at any time.
7)
When all heating circuits are fully open and a return temper-
ature of at least 18 °C is maintained, the commissioning is
complete.
ATTENTION!
Operating the heat pump at low system temperatures may cause the heat
pump to break down completely.
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