Purpose Of The Heat Pump; Application; Principle Of Operation; Scope Of Delivery - Dimplex Sij 75Ter+ Montageanweisung

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. The mixture of water and
frost protection (brine) acts as a heat transfer medium in the heat
source system. Ground probes, ground heat collectors or similar
systems can be used as heat source systems.

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
55 °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.
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Scope of Delivery

3.1 Basic Device

The basic device consists of a ready-to-use heat pump for indoor
installation, complete with sheet metal casing, control panel and
integrated heat pump manager. The refrigerant circuit is hermet-
ically sealed. It contains the Kyoto protocol approved refrigerant
R404A with a GWP value of 3784. 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 temperature
including mounting hardware as well as a strainer are supplied
with the heat pump. The supply for the load current and the con-
trol voltage must be installed 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.
The customer must provide both the heat source system and the
brine circuit manifold.
1) Switch box
2) Evaporator
3) Condenser
4) Compressor
5) Filter drier
6) Hot water liquefier
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