EN-7 452163.66.36 · FD 9110
www.dimplex.de
English
LA 6TU
7.3 Procedure
The heat pump is started up via the heat pump manager. Adjust-
ments should be made in compliance with the instructions.
If an overflow valve is fitted to maintain the minimum heat-
ing water flow rate, the valve must be adapted to the require-
ments of the heating system. Incorrect adjustment can lead to
faulty operation and increased energy consumption. We recom-
mend 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 unfavorable 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 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 during start up.
At hot water temperatures under 7° C, start-up is not possible.
The water in the buffer tank must be heated to a minimum
of 18 °C with the second heat generator.
To ensure a problem-free start-up, 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 "Start-up" 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 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 heat circuits are fully open and a return tempera-
ture of at least 18° C is maintained, the heat pump start-up
is complete.
ATTENTION!
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.
8 Cleaning / maintenance
8.1 Maintenance
To protect the paintwork, avoid leaning anything against the de-
vice or putting objects on the device. External heat pump parts
can be wiped with a damp cloth and 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 system
cannot be contaminated. In the event that operating malfunctions
due to contamination still occur, the system should be cleaned as
described below.
8.2 Cleaning the heating system
ATTENTION!
The integrated dirt trap must be cleaned at regular intervals.
The maintenance intervals should be defined according to the
degree of soiling in the system. The filter insert should also be
cleaned.
For cleaning, the heating circuit must be made pressureless in
the vicinity of the dirt trap, the filter compartment unscrewed, and
the filter insert removed and cleaned. Assembly carried out in re-
verse order requires attention to correct assembly of the screen
inserts and tightness of the screw joints.
The ingress of oxygen into the heating water circuit may result in
the formation of oxidation products (rust), particularly if steel
components are used. They enter the heating system via the
valves, the circulating pumps and/or plastic pipes. It is therefore
essential - in particular with respect to the entire pipework - that
only diffusion-resistant materials are used.
NOTE
We recommend the installation of a suitable corrosion protection system
to prevent the formation of deposits (e.g. rust) in the condenser of the
heat pump. We recommend equipping diffusion-open heating systems
with an electrophysical anti-corrosion system (e.g. ELYSATOR system).
Residue from lubricants and sealants may also contaminate the
heating water.
In the case of severe contamination leading to a reduction in the
performance of the liquefier in the heat pump, the system must
be cleaned by a heating technician.
Based on current information, we recommend using a 5% phos-
phoric acid solution for cleaning purposes. However, if cleaning
needs to be performed more frequently, a 5% formic acid solu-
tion should be used.
In either case, the cleaning fluid should be at room temperature.
We recommend flushing the heat exchanger in the direction op-
posite to the normal flow direction.
To prevent acidic cleaning agents from entering the heating sys-
tem circuit, we recommend connecting the flushing device di-
rectly to the flow and return of the liquefier of the heat pump.
It is then important that the system be thoroughly flushed using
appropriate neutralising agents to prevent any damage from
being caused by cleaning agent residue remaining in the system.
Heat source
temperature
Max. temperature spread
between heating flow and return
flow
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
Summary of Contents for LA 6TU
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