6. Preparations for commissioning
26
6 Preparatio ns f or c omm iss ioning
6.1 Cooling air volume/minimum cross
Fig. 10
1 Cooling air intake
2 Cooling air outlet
The cooling air volume required by these screw
compressors is as follows:
water-cooled units approx. 115 m³/min
air-cooled units approx. 280 m³/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/17ft/sec. We
recommend a minimum duct cross-section of approx.
0.93 m
2
(10 ft
2
) (air-cooled units) or 0.38 m² (4.1 ft²)
(water-cooled units).
Important
The stated minimum cross-section refers to a
maximum duct length of 5 m/16.4 ft and a maximum
of one bend. In the event of differing values
(over 5 m/16.4 ft, more than one bend, filter
cartridges, screens, etc.), please contact your
technical adviser.
CompAir screw compressors are rated for ambient
temperatures and cooling temperatures of +2°C
(35.6°F) to +45°C (113°F).
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
quantity required by the compressors installed in the
compressed air station.
The figures below show the recommended ventilation
sections arrangement:
Fig. 11
6.2 Compressed air connection
Fig. 12
1 Compressed air connection
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