Bedienungsanleitung Dimplex SI 75ZSR (Seite 15 von 44) (Deutsch, Englisch, Französisch)

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2 Purpose of the heat

pump

2.1 Application

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

heating and cooling of heating water. It can be used in new or

previously existing heating systems. Brine is used as the heat

transfer medium in the heat source system. Borehole heat ex-

changers, ground heat collectors or similar systems can be used

as the heat source.

2.2 Principle of Operation

Heating

The heat generated by the sun, wind and rain is stored in the

ground. This heat stored in the ground is collected at low temper-

ature by the brine circulating in the ground collector, ground coil

or similar device.

A circulating pump then conveys the warmed brine to the evapo-

rator of the heat pump. There, the heat is given off to the refriger-

ant in the refrigeration cycle. When so doing, the brine cools so

that it can again take up heat energy in the brine circuit.

The refrigerant is drawn in by the electrically driven compressor,

is compressed and “pumped” to a higher temperature level. The

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

process, but most of the generated heat is transferred to the re-

frigerant.

Subsequently, the refrigerant is passed through the condenser

where it transfers its heat energy to the heating water. Based on

the thermostat setting, the heating water is thus heated to up to

60 °C.

Cooling

The functions of the evaporator and the liquifier are reversed in

the “Cooling” operating mode.

The heating water gives up its heat to the refrigerant via the liqui-

fier which is now functioning as an evaporator. The refrigerant is

pumped to a higher temperature level using the compressor.

Heat passes into the brine via the liquifier (evaporator in heating

operation) and consequently into the ground.

3 Baseline Unit

The baseline unit consists of a heat pump, ready for connection,

for indoor installation, complete with sheet metal cabinet, control

box and integrated controller. The refrigerant circuit is hermeti-

cally sealed. It contains the Kyoto protocol approved refrigerant

R404A with a GWP value of 3260. It is CFC-free, does not de-

plete ozone and is non-flammable.

All components required for the operation of the heat pump are

located in the control box. A sensor for the external wall temper-

ature including mounting hardware as well as a strainer are sup-

plied with the heat pump. The voltage supply for the load and

control current must be provided by the customer.

The control wire of the brine pump (to be provided by the cus-

tomer) is to be connected to the control box. When so doing, a

motor protecting device is to be installed, if required.

The collector including the brine manifold must be provided by

the customer.

1) Control

2) Evaporator

3) Condenser

4) Compressor

5) Transport securing devices

6) Filter drier

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