7. Preparations for commissioning
25
7
Pr epar ati on s f or com m iss io nin g
7.1
Cooling air volume/minimum cross
Fig. 8
1 Cool air intake
2 Cool air exhaust
The cooling air volume required by these screw
compressors is as follows:
L15-L22 60-Hz: approx. 1942 cfm
L15 RS-L22 RS 50/60 Hz: approx. 1659 cfm
If conditions are not favorable, we recommend the
installation of venting ducts. However, the velocity of
the cooling air should not exceed 11 mph. We
recommend a minimum duct cross-section of approx.
310 in
2
.
NOTICE
The minimum channel diameter is based on a
duct with a maximum length of 16.4 ft and a
maximum of one bend. For different values
(over 16.4 ft, more than one bend, using filters,
grills, etc.) please consult with your expert
advisor.
The screw compressor is designed for ambient
and cooling air temperatures of 33.8 °F to
113 °F. For temperatures outside of this range,
please consult your expert advisor.
To ensure proper heat removal, auxiliary fans
installed should move approximately 15 to 20%
more air volume than the sum of the cooling air
volume required by the compressors in the air
compressor station.