23
Bild 10 air-cooled unit
Figures :
1 Cooling air outlet SAE 2"
CompAir
2
1
CompAir
1
2
6.1 Cooling air volume/minimum cross-
sections
6. Preparations for commissioning
Fig. 8 air-cooled unit
Figures :
1 Cooling air intake
2 Cooling air outlet
The cooling air volume required by air-cooled (AS) and
water-cooled (WS) screw compressors is as follows :
L37S-L45A approx. 100 m
3
/min.
L55-L75A approx. 140 m
3
/min.
L37S-L75W approx. 65 m
3
/min.
Under unfavourable local conditions, we recommend
the installation of venting ducts. However, the velocity
of the cooling air should not exceed 5 m/s. We recom-
mend a minimum cross-section of approx. 0.4 m
2
.
Important
The stated minimum cross-section refers to a ma-
ximum duct length of 5 m and a maximum of one
bend. In case of differing values (over 5 m, more
than one bend, filter cartridges, screens, etc.) plea-
se contact your technical adviser.
CompAir screw compressors are rated for ambi-
ent temperatures and cooling air temperatures of
+1 °C to +40 °C. In the case of temperatures other
than the above limiting values, please consult your
technical adviser.
Note
In order to ensure a good heat dissipation, auxiliary
fans should be rated to process approximately 15 to 20
% more air volume than the total cooling air volume re-
quired by the compressors installed in the compressed
air station.
Fig. 9 water-cooled unit
6.2 Compressed air connection
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