Bedienungsanleitung Dimplex LI 11MER (Seite 9 von 24) (Englisch)

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8 Maintenance / Cleaning

8.1 Maintenance

To protect the paintwork, avoid leaning or putting objects on the

device. External heat pump parts can be wiped with a damp cloth

and domestic cleaner.

ATTENTION!

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. We recommend protecting the evapo-

rator by installing a bird guard in the inlet duct. At least 80% of the

cross section of the grating should be open. In the event that op-

erating malfunctions due to contamination still occur, 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 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 liquifier in the heat pump, the system must be

cleaned by a heating technician.

According to today's state of knowledge, 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 liquifier 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 great care and all relevant regulations of

the employers' liability insurance associations must be adhered

to.

If in doubt, contact the manufacturer of the chemicals!

8.3 Cleaning the Air System

Air ducts, evaporator, ventilator and condensate outflow should

be cleaned of contamination (leaves, twigs, etc.) before the heat-

ing period. Do this by opening the front of the heat pump. The

bottom should be opened first followed by the top.

ATTENTION!

Before opening the device, ensure that all circuits are isolated from the

power supply.

Remove and rehang the side panel assemblies as described in

Chapter 4.

To prevent the evaporator and the condensate tray from being

damaged, do not use hard or sharp objects for cleaning.

9 Faults / Trouble-

Shooting

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 shown on the heat pump manager display.

Simply consult the Faults and Trouble-shooting page in the oper-

ating instructions of the heat pump manager. If you cannot cor-

rect 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 refrigeration oils.

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