Cleaning / Maintenance; Maintenance; Cleaning The Heating System; Cleaning The Air System - Dimplex LA 33TBS Installation And Operating Instructions Manual

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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 commercially available do-
mestic 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
can not be contaminated. Should operating malfunctions due to
contamination still occur, however, the system should be cleaned
as described below.

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 enter the heating system via the
valves, the circulating pumps and/or plastic pipes. A diffusion-re-
sistant installation is therefore essential, especially with regard to
the piping of underfloor heating systems.
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.
Residue from lubricants and sealants may also contaminate the
heating water.
In the event 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 both cases, 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.
Acids must be used with care and the regulations of the employ-
ers liability insurance associations must be adhered to.
The instructions of the cleaning agent manufacturer must always
be observed.
EN-10

8.3 Cleaning the air system

The evaporator, fan and condensate drain should be cleaned of
contamination (leaves, twigs, etc.) before each new heating pe-
riod. The top covering panels of the heat pump must be removed
for this. The bottom left covering panel may also have to be re-
moved for cleaning the condensate drain or the condensate pipe.
ATTENTION!
Before opening the device, ensure that all electric circuits are
disconnected from the power supply.
Remove and re-hang the side panel assemblies as described in
Cap. 4 on page 5.
To prevent the evaporator and the condensate tray from being
damaged, do not use hard or sharp objects when cleaning.
ATTENTION!
The refrigeration circuit must not be damaged.
Inflammable refrigerant could leak out if the refrigeration circuit is
damaged. Ignition sources and open flames must be avoided
when carrying out any work on the device.
Under extreme weather conditions (e.g. snow drifts), ice may
form on the air intake and air outlet grids. If this happens, the ice
must be removed from the vicinity of the air intake and air outlet
grids to ensure that the minimum air flow is maintained.
452166.66.05 · FD 9803
LA 33TBS
www.dimplex.de