13-25-639 v00 Page 26
7.1
Cooling air volume/minimum cross
The figures below show the recommended ventilation
sections arrangement:
Fig. 8
a
1 Cool air intake
2 Cool air exhaust
3 Switch cabinet cool-air intake
(only variable speed units)
The cooling air volume required by these screw
compressors is as follows:
L90 A / L90RS A
6957 cfm
L110 A/ L110RS A
8758 cfm
L132 A / L132RS A
8758 cfm
L90-L132 W /L90RS-L132RS W
3531 cfm
If conditions are not favorable, we recommend the
installation of venting ducts. However, the velocity of
the cooling air should not exceed 17ft/sec. We
recommend a minimum duct cross-section of approx.
9.8 ft
2
.
Fig. 8 b
NOTICE
The stated minimum cross-section refers to a
maximum duct length of 16.4 ft and a maximum
of one bend. In the event of differing values
(over 16.4 ft, more than one bend, filter
cartridges, screens, etc.), please contact your
technical adviser.
Gardner Denver screw compressors are rated
for ambient temperatures and cooling
temperatures of 35.6°F to 104°F.
In the case of temperatures other than
the above limiting values, please consult
your technical adviser.
NOTICE
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.
AIR CHANNEL
AIR
INTAKE
VENTILATOR
AIR
INTAKE
Summary of Contents for L Series
Page 58: ...13 25 639 v00 Page 57 Fig 28 all dimensions in inches...
Page 59: ...NOTES...