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LA 22TBS - LA 28TBS
6.3 Electrical connection
3 lines/cables must be routed to the heat pump in total:
A standard 5-core cable is used to connect the heat pump to
the power supply.
The cable must be provided on-site. The conductor cross
section is selected in accordance with the power consump-
tion of the heat pump (see attachment 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) must
be installed in the heat pump power supply.
A 3-pole circuit breaker with joint tripping of all outer conduc-
tors (trip current in accordance with device information) pro-
vides the short circuit protection taking into account the lay-
out of the internal wiring.
The relevant components in the heat pump contain an inter-
nal overload protection.
When connecting, ensure that the incoming supply has a
clockwise rotating field.
Phase sequence: L1, L2, L3.
ATTENTION!
Ensure that there is a clockwise rotating field: With incorrect wiring the
starting of the heat pump is prevented. A corresponding warning is
indicated on the display of the heat pump manager (adjust wiring).
The control voltage is supplied via the heat pump man-
ager.
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 (not included in the scope
of supply) connects the heat pump manager with the heat
pump. More detailed instructions can be found in the heat
pump manager operating instructions and in the electrical
documentation.
NOTE
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.
6.3.1 Demand sensor connection
The demand sensor R2.2 (NTC 10) is included with the heat
pump manager. It must be installed depending on the hydraulics
used (see attachment chapter 3 on page VII).
If no request sensor is connected, regulation of the 2nd heat gen-
erator will not be possible in the event that communication with
the heat pump manager is disrupted.
NOTE
The return sensor R2 installed in the heat pump is active when the
compressor is running and must not be disconnected.
EN-8
7
Commissioning
7.1 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. These measures can also include
an additional warranty under certain conditions (see Warranty).
7.2 Preparation
The following items must be checked prior to commissioning:
All of the heat pump connections must be installed as de-
scribed in chapter 6.
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.
7.3 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 to a mini-
mum of 18 °C with the second heat generator.
To ensure problem-free commissioning, the following procedure
must 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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