BlueCool S Series 4 Information on Unit
7
The BlueCool S is an air-conditioning system with its four
basic components, i.e. compressor, condenser, evaporator
and throttle element.
Evaporator (air heat exchanger)
Refrigerant vapourises at low pressure and a temperature
below the ambient temperature of the evaporator. It
absorbs heat from the ambient air in the process.
Compressor (refrigerant compressor)
The refrigerant vapour extracted from the evaporator at low
pressure is compressed to a higher pressure, and therefore
to a higher temperature. In the process, additional heat is
fed to the refrigerant.
Condenser (sea-water heat exchanger)
The compressed, heated refrigerant vapour is condensed at
a temperature which is above the sea water temperature. In
the process, the entire heat absorbed in the evaporator and
compressor is given off to the sea water.
Throttle element (capillary tube)
The refrigerant at condensing pressure is expanded to the
evaporation pressure in the throttle element.
Cooling mode of operation
The air-conditioning system absorbs heat form the room air
in the evaporator and cools it down by approx. 15°K. The
cooled air is blown into the room with the fan.
The compressor now compresses the refrigerant vapour,
which is then condensed to a liquid when flowing through
a condenser cooled with sea water. The heat released is
emitted to the sea water. The condensed refrigerant is
routed through the throttle element and expanded to wet
steam when flowing into the evaporator. The liquid portion
of the refrigerant is now evaporated and absorbs heat from
the room air again. As a result, the refrigerant circuit is
closed.
Heating mode
Heat can also be generated with the BlueCool S air-
conditioning system. A 4-way reverse valve is installed in the
system for this purpose. As a result, the condenser becomes
an evaporator and vice versa. The sea water heat exchanger
(not the evaporator) withdraws available heat from the sea
water, which is then fed to the refrigerant. The air heat
exchanger becomes the condenser and gives off the
condensation heat to the room air and heats it to approx.
45/50 °C.
4.6 Dimensions and minimum distances
> xxx: Minimum distance
(yyy): Recommended distance
>40* and >50**: Exception S27, see table in Chapter 4.7
To remove and clean the air filter, a distance of > 100 mm
above the system should be maintained if the cover plate
cannot be removed.
NOTE
With all Webasto air-conditioning systems, sea
water flows through the condenser, which is
sucked in via a pump. This ensures the cooling
process. If the sea water temperature is above
35 °C, the cooling capacity of the air-
conditioning system drops, as the heat absorbed
can not longer be sufficiently transferred.
NOTE
The heating mode is inefficient if the sea water
temperature drops below approx. 6 °C, as it is
not possible to extract sufficient heat from the
cold sea water. The interior air cannot be heated
sufficiently.
Fig. 5 Dimensions and minimum distances
H
>50
(100)
D
L
>40*
(100)
>50**
(100)
>40
(100)
>20
(150)
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