Purpose Of The Heat Pump; Application; Principle Of Operation; Baseline Unit - Dimplex SIH 20TE Installation And Operating Instructions Manual

2 Purpose of the heat
pump

2.1 Application

The brine-to-water heat pump is to be used exclusively for the
heating of heating water. It can be used in new or previously ex-
isting heating systems. Brine is used as the heat transfer medium
in the heat source system. Borehole heat exchangers, ground
heat collectors or similar systems can be used as the heat
source.

2.2 Principle of Operation

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 refrig-
erant 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
70 °C.
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Baseline Unit

The basic device consists of a ready-to-use heat pump for indoor
installation, complete with sheet metal casing, control panel and
integrated controller. The refrigerant circuit is hermetically
sealed. It contains the Kyoto protocol approved refrigerant
R134a with a GWP value of 1300. 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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