Purpose Of The Heat Pump; Application; Operating Principle; Basic Device - Buderus WPS 70IK Montage- Und Gebrauchsanweisung

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 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 refriger-
ating cycle. 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 compressor,
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 (thermostat setting), the heating water is
thus heated up to a max. of 60 °C.
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Basic Device

The basic device consists of a ready-to-use heat pump for indoor
installation in a compact design. In addition to the control panel
with integral controller, the device is already equipped with all of
the most important components of the heating circuit and the
brine circuit:
Expansion vessel
Circulating pumps
Pressure relief valves
Pressure gauge
Overflow valve (heating circuit)
The refrigerant circuit is hermetically sealed. It contains the
Kyoto protocol approved refrigerant R407C with a GWP value of
1525. It is CFC-free, does not deplete ozone and is non-flamma-
ble.
All components required for the operation of the heat pump are
located on the control panel. The power feed for the load current
and the control current must be installed by the customer.
The customer must provide both the collector and the brine cir-
cuit manifold.
1) Control panel
2) Circulating pumps
3) Liquifier
4) Compressor
5) Evaporator
6) Expansion vessel
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