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WIH 120TU
2
Intended use of the heat
pump
2.1 Intended purpose
The water-to-water heat pump is to be used exclusively for the
heating of heating water. It can be used in newly built or previ-
ously existing heating systems. Water is used as the heat carrier.
It can be supplied by wells or other water systems.
In order to eliminate the risk of corrosion at the evaporator, the
well water must be evaluated regarding the corrosion behaviour
of metallic materials according to DIN 50930.
Details can be found in the project planning and installation man-
ual for heat pumps for heating purposes.
ATTENTION!
The well water must comply with the required water quality standards.
(see Cap. 9.4 on pag. 10)
2.2 Operating principle
A well pump conveys the water to the evaporator of the heat
pump. There the heat is transferred to the refrigerant in the refrig-
erating 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, the heating water can thus be heated up
to a max. of 70 °C.
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3
Basic device
The device consists of a heat pump for indoor installation wired
ready for use with metal casing, switch box and integrated heat
pump manager. The refrigeration circuit is "hermetically sealed"
and contains the fluorinated refrigerant R134a included in the
Kyoto protocol. Information on the GWP value and CO
lent of the refrigerant can be found in the chapter Device informa-
tion. The refrigerant is CFC-free, non-ozone depleting and non-
combustible.
All components required for the operation of the heat pump are
located in the switch box. An outside temperature sensor includ-
ing fixing accessories and a dirt trap are supplied with the heat
pump. The supply for the supply voltage and the control voltage
must be installed by the customer.
The circulating pumps included in the scope of supply must be in-
stalled in accordance with the hydraulic diagrams (see Cap. 4 on
pag. XII) or the development documents. The electrical connec-
tion of the circulating pumps must be established in accordance
with Cap. 7.5.3 on pag. 8.
The control wire of the primary 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 customer must provide hydraulic components for the well
water circuit.
1
7
4
1)
Switch box
2)
Evaporator
3)
Liquefier
4)
Compressor
5)
Filter dryer
6)
Economiser
7)
Expansion valve
452234.66.57 · FD 9908
English
equiva-
2
2
6
EN-3
3
5
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