4
BASELINE UNIT
The baseline unit consists of a heat pump, ready
for connection, for indoor installation complete with
sheet metal cabinet, control panel and integrated
controller. The refrigeration cycle contains the
refrigerant R407C. Refrigerant R407C is CFC-free,
non-ozone depleting and non-combustible.
All components required for the operation of the heat
pump are located on the control panel. The power
feed for the load and control current must be field-
installed by the customer.
The supply lead of the brine pump (to be provided by
the customer) must be connected to the control
panel. When so doing, a motor protecting device is
to be installed, if required.
The collector loops including brine manifold must
be provided by the customer.
1
2
3
4
1) Condenser
3) Compressor
2) Control panel
4) Evaporator
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2
PURPOSE OF HEAT PUMP
BASELINE UNIT
PURPOSE OF THE HEAT
PUMP
2.1 Application
The brine-to-water heat pump is designed for use
in existing or newly built heating systems. Brine is
used as the heat carrier in the heat source system.
Ground coils, ground 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 by the brine circulating in the ground
collector, ground coil or similar device, at low
temperature. 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 cycle. When so doing, the brine cools
so that it can again take up heat energy in the brine
circuit.
The refrigerant, however, 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 trans-
ferred to the refrigerant as well.
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
In the Cooling mode, the operating process of the
evaporator and condenser is reversed.
The heating water transfers the heat to the refrigerant
via the condenser that is now working as the
evaporator. In the compressor the temperature of
the refrigerant is raised. The heat is rejected to the
brine, and ultimately to the ground, via the condenser
(which acts as the evaporator in the heating mode).
