Bedienungsanleitung Dimplex SI 130TU (Seite 25 von 56) (Deutsch, Englisch, Französisch)

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www.glendimplex.de 452237.66.52a · FD 0204 EN-9

SI 130TU English

9 Cleaning / maintenance

9.1 Maintenance

To prevent faults due to sediment in the heat exchangers, care

must be taken to ensure that no impurities can enter either the

heat source system or the heating system. In the event that op-

erating malfunctions due to contamination occur nevertheless,

the system should be cleaned as described below.

9.2 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-

resistant installation is therefore essential, especially with re-

gard to the piping of underfloor heating systems.

NOTE

ºººº

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 %

phosphoric acid solution for cleaning purposes. However, if

cleaning needs to be performed more frequently, a 5 % formic

acid solution should be used.

In both cases, the cleaning fluid should be at room tempera-

ture. We recommend flushing the heat exchanger in the direc-

tion opposite to the normal flow direction.

To prevent acidic cleaning agents from entering the heating

system circuit, we recommend connecting the flushing device

directly 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 sys-

tem.

Acids must be used with care and the regulations of the em-

ployers liability insurance associations must be adhered to.

The instructions of the cleaning agent manufacturer must al-

ways be observed.

9.3 Cleaning the heat source

system

CAUTION!

The supplied dirt trap must be inserted in the heat source inlet

of the heat pump to protect the evaporator against the ingress

of impurities.

The filter sieve of the dirt trap should be cleaned one day after

start-up. Further checks must be set according to the level of

dirt. If no more signs of contamination are evident, the filter can

be removed to reduce pressure drops.

10 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

indicated on the heat pump manager display. In this case, con-

sult the "Faults and troubleshooting" page in the operating in-

structions of the heat pump manager.

If you cannot correct the fault yourself, please contact your

after-sales service technician.

CAUTION!

Before opening the device, ensure that all circuits are

disconnected from the power supply!

After disconnecting the power supply, always wait for at least

5 minutes to allow stored electric charges to dissipate.

CAUTION!

Work on the heat pump must only be performed by

authorised and qualified after-sales service technicians!

11 Decommissioning / disposal

Before removing the heat pump, disconnect it from the power

source and close all valves. The heat pump must be dismantled

by trained personnel.

All environmentally-relevant requirements regarding the recov-

ery, recycling and disposal of materials and components should

be observed in accordance with the applicable standards. Par-

ticular attention should be paid to the proper disposal of refrig-

erants and refrigerant oils.

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