Manual Dimplex SIK 8TES (page 30 of 72) (English, German, French)

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EN-10 452231.66.34 · FD 9912 www.gdts.one

English SIK 6TES - SIK 14TES

9 Maintenance and Cleaning

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 products enter the heating sys-

tem via the valves, the circulating pumps and/or plastic pipes. It

is therefore essential - in particular with respect to the piping of

underfloor 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.

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 either case, 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 flow of the liquifier. It is important

that the system be thoroughly flushed using appropriate neu-

tralising 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 ad-

hered to.

The manufacturer's instructions regarding cleaning agent must

be complied with at all times.

9.3 Cleaning the Heat Source

System

ATTENTION!

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 / Trouble-Shooting

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. Simply consult

the Faults and Trouble-shooting 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.

ATTENTION!

Disconnect all electrical circuits from the power source prior

to opening the device.

11 Decommissioning/Disposal

Before removing the heat pump, disconnect it from the power

source and close all valves. The heat pump must be installed by

trained personnel. Observe all environmentally-relevant re-

quirements 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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Dimplex SIK 8TES Manual

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