Cleaning / Maintenance; Cleaning & Maintenance; Cleaning The Heating System; Cleaning The Air System - Dimplex LA 9TU Instructions D'installation Et D'utilisation

LA 9TU - LA 12TU
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

Only applies to the LA 12TU:
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.
EN-8
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 manufacturer's instructions regarding cleaning agent must
be complied with at all times.

8.3 Cleaning the air system

The evaporator, ventilator and condensate outflow should be
cleaned of contamination (leaves, twigs, etc.) before each new
heating period. Do this by opening the heat pump as described in
Chapter 6.1.
ATTENTION!
Before opening the device, ensure that all circuits are powered down.
To prevent the evaporator and the condensate tray from being
damaged, do not use hard or sharp objects when cleaning.
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 in the vicinity of the air intake and air outlet
grids to ensure that the minimum air flow is maintained.
To ensure proper drainage from the condensate tray, it must be
regularly inspected and cleaned, if necessary.
9

Faults / troubleshooting

This heat pump is a quality product and is designed for trouble-
free operation. In the event that a fault should occur, it will be in-
dicated on the heat pump manager display. In this case, consult
the "Faults and troubleshooting" page in the operating instruc-
tions of the heat pump manager. If you cannot correct the fault
yourself, please contact your after-sales service technician.
ATTENTION!
Any work on the heat pump may only be performed by authorised and
qualified after-sales service technicians.
10 Decommissioning /
disposal
Before removing the heat pump, disconnect it from the power
source and close all valves. The deinstallation of the heat pump
must be performed by technical personnel. Observe all environ-
mentally-relevant requirements regarding the recovery, recycling
and disposal of materials and components in accordance with all
applicable standards. Particular attention should be paid to the
proper disposal of refrigerants and refrigerant oils.
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