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erant is conducted to an air-cooled
condenser, which condenses the
refrigerant under high pressure as
a result of the heat exchange. The
air emerging from the condenser
heats the environment. Using a
controllable injection valve, the
liquid refrigerant is conducted back
to the evaporator, where the cycle
begins once again.
To regulate the cooling capacity,
a return temperature dependent,
multi-stage regulation is used,
which guarantees autonomous
unit operation in addition to all
safety functions. A floating contact
enables a remote release.
The unit is designed for outdoor
installation. It can also be used in-
doors under certain circumstances.
The cooling circuit of the unit con-
sists of an evaporator, compressor,
thermal injection valve, condenser,
condenser fan, pressure trans-
ducer, and high and low pressure
monitors. According to design, the
medium circuit consists of a plate
heat exchanger, circulation pump,
expansion vessel, safety valve,
differential pressure monitor, and
storage tank.
Accessories include winter fan
The units are provided in a stable
transport packaging. Please check
the units immediately at delivery,
note down any damage or miss-
ing parts on the delivery note, and
inform the shipping agent and your
contracting partner.
We assume no guarantee for later
complaints.
Description of the unit
Transport and packaging
During cooling mode, the unit (air-
cooled chiller) takes up the heat
from the operating medium to be
cooled (water or a water/glycol
mixture) within a closed medium
circuit in the evaporator (flat plate
evaporator) and delivers it to the
closed cooling circuit. As a result
of the heat exchange, the medium
cools and the refrigerant in the
cooling circuit evaporates under
low pressure.
The gaseous refrigerant enters
an electrically driven compressor
(scroll construction), which increas-
es the pressure and temperature of
the refrigerant. The gaseous refrig-
controls, cabled remote controls,
crankcase heaters, vibration damp-
ers, heaters for anti-frost protec-
tion medium, protective grids,
glycol concentrate, and technical
unit handover.
Intended
use
According to design and equip-
ment, the units are intended for
use only as chillers for cooling an
operating medium of water or
a water-glycol mixture within a
closed medium circuit.
Any other use or any use going
beyond this application is consid-
ered improper. The manufacturer/
supplier is not liable for resulting
damage. The user alone bears the
risk.
Intended use also includes the
observance of the operating and
installation instructions, as well as
the maintenance conditions.
Legend:
1 Circulation pump
2 Manual bleeder
3 Flat plate evaporator
4 Differential pressure monitor
5 Diaphragm expansion vessel
6 Safety valve
7 Shut-off valve
8 Victaulic connectors
9 Medium storage tank
10 Free-cooling register
11 Three-way, free-cooling valve
12 Filling/draining valve
13 Medium inlet sensor
14 Medium outlet sensor
15 System return sensor
16 Ambient temperature sensor
Unit setup for medium circuit
KWG
8213
14
3 4
KWG...P
871213
14
3 4
KWG...SP
14
871213
9
12
56
3
4
5
5


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