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LIA 0608HWCF M - LIA 0911HWCF M
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 indoor unit connections must be installed as de-
scribed in Kapitel 6.1.
All of the outdoor unit connections must be installed as de-
scribed in Kapitel 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 settings of the heat pump manager must be adapted
to the heating system in accordance with the manager's
operating instructions.
The heating water circuit, domestic hot water cylinder and
buffer tank of the indoor unit must be completely filled and
purged.
Ensure that the condensate drain functions properly.
The outflow from the heating water pressure relief valve
must also function correctly.
Purging the heating system:
Ensure that all heating circuits are open, purge the system
at the highest position and refill water if necessary (comply
with static minimum pressure).
8.3 Commissioning procedure
The heat pump is commissioned via the heat pump manager.
Settings should be made in compliance with the heat pump
manager's instructions.
The on-site overflow valve must be adjusted to the require-
ments of the respective heating system. Incorrect adjustment
can lead to faulty operation and increased energy consump-
tion. We recommend carrying out the following procedure to
set the overflow valve correctly:
Close all heating circuits that may also be closed during opera-
tion (depending on how the heat pump is being used) so that
the most unfavourable operating status with regard to the
water flow 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 heat flow and
heat return flow, listed in the following table, for the current
heat source temperature. The temperature spread should be
measured as close as possible to the inside of the unit. The
heating element of mono energy systems should be discon-
nected during commissioning.
At heating water temperatures under 7°C, commissioning is not
possible. The water in the buffer tank must be heated with the
2nd heat generator to at least 18 °C.
To ensure problem-free commissioning, the following proce-
dure 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 “winter” 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 heat-
ing water temperature in the buffer tank must not be al-
lowed to drop below 20 °C during this process. This en-
sures that the heat pump can be defrosted at any time.
7) When all heating circuits are fully open and a return tem-
perature of at least 18 °C is maintained, the commissioning
is complete.
CAUTION!
!!
Operating the heat pump at low system temperatures may
cause the heat pump to break down completely. After a
prolonged power failure, the commissioning procedure
detailed above must be followed.
Heat source
temperature
Max. temperature spread
between heating flow and return
from
to
-20 °C
-15 °C
4 K
-14 °C
-10 °C
5 K
-9 °C
-5 °C
6 K
-4 °C
0 °C
7 K
1 °C
5 °C
8 K
6 °C
10 °C
9 K
11 °C
15 °C
10 K
16 °C
20 °C
11 K
21 °C
25 °C
12 K
26 °C
30 °C
13 K
31 °C
35 °C
14 K
