Manual Dimplex SI 35TUR (page 19 of 56) (English, German, French)

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www.glendimplex.de 452237.66.54a · FD 0110 EN-3

SI 35TUR English

2 Intended use of the heat

pump

2.1 Area of 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

existing heating systems. A mixture of water and frost protec-

tion (brine) is used as a heat transfer medium in the heat source

system. Borehole heat exchangers, ground heat collectors or

similar systems can be used as the heat source system.

2.2 Operating principle

Heating

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

ground. This ground heatis collected at a low temperature by

the brine in the ground heat collector, borehole heat exchanger

or similar.

A circulating pump then conveys the "heated" brine to the

evaporator of the heat pump. There the heat is given off to the

refrigerant in the refrigeration circuit. This cools the brine so

that it can once again absorb thermal energy in the brine 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 in the

form of thermal energy.

Subsequently, the refrigerant is passed through the liquefier,

where it transfers its heat energy to the heating water. Depend-

ing on the set operating point, the heating water is thus heated

up to max. 62 °C.

Cooling

The functions of the evaporator and the liquefier are reversed in

the "Cooling" operating mode.

The heating water transfers its heat to the refrigerant via the liq-

uefier, which is now functioning as an evaporator. The refriger-

ant is brought to a higher temperature level using the compres-

sor. Heat passes into the brine via the liquefier (evaporator in

heating operation) and consequently into the ground.

2.3 Functional description for

integrated thermal energy

metering

The compressor manufacturer’s performance specifications for

different pressure levels are stored in the heat pump software.

Two additional pressure sensors for determining the current

pressure level are installed in the refrigerating circuit, one be-

fore and one after the compressor. The current heat output can

be calculated from the compressor data stored in the software

and the current pressure level. The integral for the heat output

over the runtime gives the quantity of thermal energy supplied

by the heat pump, which is displayed separately for heating,

domestic hot water preparation and swimming pool water

preparation on the manager display.

3Basic device

The basic device consists of a heat pump for indoor installation

wired ready for use with metal casing, switch box and inte-

grated heat pump manager. The refrigeration circuit is "hermet-

ically sealed" and contains the fluorinated refrigerant R410A in-

corporated in the Kyoto protocol. Information on the GWP

value and CO2 equivalent of the refrigerant is available in the

chapter Device information. 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 load current and the control volt-

age must be installed on-site.

Both the heat source system and the brine circuit manifold

must be provided on-site.

1) Switch box

2) Evaporator

3) Liquefier

4) Compressor 1

5) Compressor 2

6) Expansion valve

7) Filter dryer

8) Four-way reversing valve

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Dimplex SI 35TUR Manual

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