Intended Use Of The Heat Pump; Intended Purpose; Operating Principle; Basic Device - Dimplex Si 75Tu Montage- Und Gebrauchsanweisungen

SI 75TU
2 Intended use of the heat
pump

2.1 Intended purpose

The brine-to-water heat pump is to be used exclusively for the
heating of heating water. It can be used in new or existing heat-
ing systems. A mixture of water and frost protection (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.
The circulating pump(s) must be controlled using the heat
pump manager.
If function-relevant or safety-relevant pump functions, such as
integration of the heat pump into the building management
system, are not supported, then this can result in loss of war-
ranty and cause a write-off of the heat pump.
The circulating pump(s) and the heat pump controller must al-
ways be ready for operation.
The specifications in the technical documents must be fol-
lowed, particularly limit values for the minimum and – if availa-
ble – maximum warm/cold water volume flow.

2.2 Operating principle

The heat generated by the sun, wind and rain is stored in the
ground. This heat stored in the ground is collected at a low tem-
perature by the brine circulating in the ground heat collector,
the borehole heat exchanger or a similar system. 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.
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.
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Basic 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-
cluded in the Kyoto protocol. Information on the GWP value
and CO equivalent of the refrigerant can be found in the chap-
2
ter 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 supply voltage and the control
voltage must be installed by the customer.
The circulating pumps (brine and heating water side) included
in the scope of supply must be installed in accordance with the
hydraulic diagrams (see Cap. 4 on pag. XII) or the development
documents. The electrical connection of the circulating pumps
must be established in accordance with Cap. 7.6.3 on pag. 11.
The customer must provide both the heat source system and
the brine circuit manifold.
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8
1
7
4
5
1) Switch box
2) Evaporator
3) Liquefier
4) Filter dryer
5) Compressor 1
6) Compressor 2
7) Expansion valve
8) Economiser
452237.66.71 · FD 0305
English
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