Maintenance / Repair; Care; Cleaning The Heating System; Cleaning The Air System - Dimplex LI 2M Instructions D'installation Et D'utilisation

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Maintenance / Repair

8.1 Care

Only use a damp cloth with some soap solution to clean the heat
pump.
ATTENTION!
Ensure water does not come into contact with the operator controls.
Unplug the mains plug and switch off the power supply before beginning
any cleaning work.

8.2 Cleaning the Heating System

The ingress of oxygen into the heating water circuit may result in
the formation of oxidation products (rust), particularly if steel
components are used. These products enter the heating system
via the valves, the circulating pumps and/or plastic pipes. It is
therefore essential - in particular with respect to the piping of un-
derfloor heating systems - that only diffusion-proof materials are
used.
ATTENTION!
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.
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.
According to current information, we recommend using a 5%
phosphoric acid solution for cleaning purposes. However, if
cleaning needs to be performed more frequently, a 5% formic
acid solution 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 flow of the liquefier of the heat pump.
It is important that the system be thoroughly flushed using appro-
priate neutralising agents to prevent any damage from being
caused by cleaning agent residue remaining in the system.
Acids must be used with care and the regulations of the employ-
ers' liability insurance associations must be adhered to.
If in doubt, contact the manufacturer of the chemicals!

8.3 Cleaning the Air System

Maintenance work in the air circuit involves the regular check
and, if required, cleaning and replacement of air filters possibly
used and checking or cleaning the intake area (free of leaves,
grass, or the like).
Clean the evaporator of the heat pump as necessary.
ATTENTION!
Risk of injury through fins with sharp edges and coasting fan wheel!
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8.4 Water Circuit / Condensate
Outflow
The water circuit check is limited to filters that may have been in-
stalled on-site, and possible leakage. Dirty water filters should be
cleaned and, if necessary, replaced. The seal valve in the con-
densed water hose end should be checked occasionally for con-
tamination, and cleaned if necessary.
9 Faults / Troubleshooting
for the user
ATTENTION!
Work on the heat pump may be carried out only by authorised and
qualified persons. Observe accident prevention regulations!
The heat pump will not operate!
Please check whether
the plug is plugged in
the operating switch is switched on
the socket is supplied with voltage
the intake air or ambient temperature is >0 °C
the heat pump has not been switched off via the temperature
controller
The pump shuts off prematurely
(The set temperature has not yet been reached)
Please check whether
air ducts have been bent or their openings closed or whether
any air filters are heavily contaminated (clogged).
the setpoint controller is set correctly or at the right stop.
Condensate cannot drain properly (there is water
under the device)
Please check whether
the seal valve in the condensed water hose is contaminated
or clogged - clean if necessary; the valve can be easily re-
moved and replaced.
ventilation is extremely reduced (bent duct / clogged air fil-
ter)
If the above questions cannot help you eliminate these faults,
please contact your technician or after-sales service.
10 Decommissioning/
Disposal
Tasks to be carried out:
Disconnect the power supply of the heat pump.
Remove the heat pump from the air and heating circuit. Re-
move water from the condenser of the heat pump.
During start-up and shut-down of the hot water heat pump, all en-
vironmental requirements regarding recovery, recycling and dis-
posal of materials and components should be observed in ac-
cordance with DIN EN 378.
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