Procedure; Cleaning / Maintenance; Cleaning & Maintenance; Care - Dimplex LI 1422C Montage- Und Gebrauchsanweisungen

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7.3 Procedure

The heat pump is commissioned via the heat pump manager.
Settings should be made in compliance with the heat pump
manager's instructions.
If an overflow valve is fitted to ensure a minimum heating water
flow, the overflow valve must be set in accordance with the re-
quirements of the respective heating system. Incorrect adjust-
ment can lead to faulty operation and increased energy con-
sumption. 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 heat pump. The heating
element of mono energy systems should be disconnected dur-
ing commissioning.
Heat source temperature
from to
-20 °C -15 °C
-14 °C -10 °C
-9 °C -5 °C
-4 °C 0 °C
1 °C 5 °C
6 °C 10 °C
11 °C 15 °C
16 °C 20 °C
21 °C 25 °C
26 °C 30 °C
31 °C 35 °C
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.
EN-14
max. temperature spread between
flow and return
4 K
5 K
6 K
7 K
8 K
9 K
10 K
11 K
12 K
13 K
14 K
452170.66.01-EN · FD 0305
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) Select "Winter" mode on the heat pump manager.
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.
NOTE
Operating the heat pump at low system temperatures may
cause the heat pump to break down completely.
8

Cleaning / maintenance

8.1 Care

To protect the paintwork, avoid leaning anything against the
device or putting objects on the device. External heat pump
parts can be wiped with a damp cloth and commercially availa-
ble domestic cleaner.
NOTE
Never use cleaning agents containing sand, soda, acid or
chloride, as these can damage the surfaces.
To prevent faults due to sediment in the heat exchanger of the
heat pump, ensure that the heat exchanger in the heating sys-
tem cannot be contaminated. We recommend protecting the
evaporator by installing a bird guard in the inlet duct. At least
80% of the cross section of the grating should be open. Should
operating malfunctions due to contamination still occur, how-
ever, the system should be cleaned as described below.
LI 1422C - 1826C
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