Bedienungsanleitung Dimplex WI 65TU (Seite 21 von 68) (Deutsch, Englisch, Französisch)

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www.gdts.one 452237.66.51 · FD 9912 EN-3

WI 65TU - WI 95TU English

1.4 Energy-efficient use of the heat

pump

By operating this heat pump you are helping to protect our en-

vironment. Both the heating system and the heat source must

be properly designed and dimensioned to ensure efficient op-

eration. It is particularly important to keep water flow tempera-

tures as low as possible. All connected heat consumers should

therefore be suitable for low flow temperatures. Raising the

heating water temperature by 1 K corresponds to an increase in

electricity consumption of approx. 2.5 %. Low-temperature

heating systems with flow temperatures between 30 °C and

50 °C are particularly well-suited for energy-efficient operation.

2 Intended use of the heat

pump

2.1 Intended purpose

The water-to-water heat pump is to be used exclusively for the

heating of heating water. It can be used in newly built or previ-

ously existing heating systems. Water is used as the heat car-

rier. It can be supplied by wells or other water systems.

In order to eliminate the risk of corrosion at the evaporator, the

well water must be evaluated regarding the corrosion behaviour

of metallic materials according to DIN 50930.

Details can be found in the project planning and installation

manual for heat pumps for heating purposes.

ATTENTION!

The well water must comply with the required water quality

standards.

(see Cap. 9.4 on pag. 10)

2.2 Operating principle

A well pump conveys the water to the evaporator of the heat

pump. There the heat is transferred to the refrigerant in the re-

frigerating circuit.

The refrigerant is drawn in by the electrically driven compres-

sor, compressed and "pumped" to a higher temperature level.

The electrical power needed to run the compressor is not lost in

this process. Most of it is absorbed by the refrigerant.

The refrigerant subsequently passes through the liquifier where

it transfers its thermal energy to the heating water. Depending

on the set operating point, the heating water can thus be

heated up to a max. of 62 °C.

3Basic device

The device consists of a heat pump for indoor installation wired

ready for use with metal casing, switch box and integrated heat

pump manager. The refrigeration circuit is "hermetically sealed"

and contains the fluorinated refrigerant R410A included in the

Kyoto protocol. Information on the GWP value and CO2 equiva-

lent of the refrigerant can be found in the chapter Device infor-

mation. The refrigerant is CFC-free, non-ozone depleting and

non-combustible.

All components required for the operation of the heat pump are

located in the switch box. An outside temperature sensor in-

cluding fixing accessories and a dirt trap are supplied with the

heat pump. The supply for the supply voltage and the control

voltage must be installed by the customer.

The circulating pumps included in the scope of supply must be

installed in accordance with the hydraulic diagrams (see Cap. 4

on pag. XIV) or the development documents. The electrical con-

nection of the circulating pumps must be established in ac-

cordance with Cap. 7.5.3 on pag. 9.

The control wire of the primary pump (to be provided by the

customer) is to be connected to the control box. When so do-

ing, a motor protecting device is to be installed, if required.

The customer must provide hydraulic components for the well

water circuit.

1) Switch box

2) Evaporator

3) Liquefier

4) Filter dryer

5) Compressor 1

6) Compressor 2

7) Expansion valve

8) Economiser

WI 65TU

WI 95TU

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