Cleaning The Air System; Faults / Troubleshooting; Decommissioning / Disposal - Dimplex LA 9TU Montage- Und Gebrauchsanweisung

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.
Acids must be used with care and the regulations of the employ-
ers' liability insurance associations must be adhered to.
In case of doubt, consult the manufacturer of the cleaning
agents!

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.
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9

Faults / troubleshooting

This heat pump is a quality product and is designed for trouble-
free and maintenance-free operation. In the event that a fault
should occur, it will be indicated on the heat pump manager dis-
play. In this case, consult the "Faults and troubleshooting" page
in the operating instructions 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. Observe all environmentally-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 dis-
posal of refrigerants and refrigerant oils.
10
EN-7