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www.dimplex.de E-3
English
3
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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