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VENTUS S-Type Air Handling Units
4.3. Connection of coolers
Connection of coolers should be done i
n such a way so as not to allow for stresses exchanger’s connections
which may result in mechanical damages or leakages. The pipeline weight and thermal stresses cannot be
passed onto the exchanger's connections. Depending on local conditions, please use the compensation at the
inlet and outlet of the pipeline system, in order to level the pipeline's linear expansion. During assembly of the
supply system to the cooler equipped with the screwed connections, counter the exchanger's connection with
additional wrench (fig.9).
The supply system should be planned in such a way so that it does not collide with the other AHU sections. The
way of connecting the exchangers with the supply system should allow for an easy pipeline disassembly in order
to remove the exchanger from the AHU, during maintenance and service operations.
Fig.9. Securing the screwed connections of the exchanger
Table 2. Diameters of coolers connection pipes
AHU type
Rows number
Connection pipe
diameter
Rows number
Inlet connection
pipe diameter
[mm]
Outlet connection
pipe diameter
[mm]
Water cooler
DX cooler
SVS-35
4R
DN32
6
2xØ16
2xØ28
6R
SVS-50
4R
DN50
6
2xØ22
2xØ35
6R
SVS-70
4R
DN50
6
2xØ22
2xØ35
6R
SVS-85
4R
DN50
6
2xØ22
2xØ35
6R
SVS-100
4R
DN50
6
2xØ22
2xØ42
6R
Inlet and outlet exchanger's connections should be connected so that the exchanger operates in a counter-
current way. Streamwise operation results in the lower average discrepancy of temperatures, which influences
the exchanger’s performance.
Examples of connecting inlet and outlet pipelines for various AHU versions shown in the picture.
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