Bedienungsanleitung Dimplex LI 24TES (Seite 31 von 76) (Deutsch, Englisch, Französisch)

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www.gdts.one 452161.66.22 · FD 9912 EN-11

LI 20TES - LI 28TES English

8Start-UP

8.1 General Information

To ensure that start-up is performed correctly, it should only be

carried out by an after-sales service technician authorised by

the manufacturer. These measures can also include an addi-

tional warranty under certain conditions (see Warranty).

8.2 Preparation

The following items need to be checked prior to start-up:

All of the heat pump connections must be established as

described in Chapter 6.

All valves that could impair the proper flow of the heating

water in the heating circuit must be open.

The air intake and air outlet paths must be clear.

The ventilator must turn in the direction indicated by the

arrow.

The settings of the heat pump manager must be adapted

to the heating system in accordance with the controller’s

operating instructions.

Ensure the condensate outflow functions.

8.3 Procedure

The heat pump is started up via the heat pump manager. Ad-

justments should be made in compliance with the instructions.

At hot water temperatures under 7 °C, start-up is not possible.

The water in the buffer tank must be heated to a minimum of

18 °C with the second heat generator.

To ensure a problem-free start-up, the following procedure is to

be implemented:

1) Close all consumer circuits.

2) Ensure that the heat pump has the correct water flow.

3) Use the manager to select the automatic operating mode.

4) In the special functions menu, start the "Start-up" program.

5) Wait until a return temperature of at least 25 °C has been

reached.

6) Now slowly reopen the heating circuit valves in succession

so that the heating water flow is constantly raised by

slightly opening the respective heating circuit. The heating

water temperature in the buffer tank must not be allowed

to drop below 20 °C during this process. This ensures that

the heat pump can be defrosted at any time.

7) When all heat circuits are fully open and a return tempera-

ture of at least 18 °C is maintained, the heat pump start-up

is complete.

ATTENTION!

Operating the heat pump at low system temperatures may

cause the heat pump to break down completely.

9 Maintenance / Cleaning

9.1 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.

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 sys-

tem can not be contaminated. We recommend protecting the

evaporator 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 operating malfunctions due to contamination still

occur, 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.

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.

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 % for-

mic 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 of the heat

pump.

It is important that the system be thoroughly flushed using ap-

propriate neutralising agents to prevent any damage from

being caused by cleaning agent residue remaining in the sys-

tem.

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 instruc4tions regarding cleaning agent

must be complied with at all times.

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