Installation
3.2
Compressor room
Page 34
Operating instructions for S 40-3...S 150-3 series screw compressors
Cooling air requirement
Please refer to the following table for the cooling air requirement and size of
the supply air openings for your compressor Ensure that flaps and weather
protection grids have the necessary free cross section. We generally recom-
mend contacting a specialist company for performing the duct construction
work and planning.
Type
Drive
rating
Air cooling
1
)
Water cooling
Cooling air
requirement
for free
standing unit
Necessary
inlet opening
for free
standing unit
Cooling air
requirement
for instal-
lation with
ducting
Necessary
free duct
cross-
section
Cooling air
requirement
for free
standing unit
Necessary
inlet opening
for free
standing unit
[Hp]
[cfm]
[sq. ft.]
[cfm]
[sq. ft.]
[cfm]
[sq. ft.]
S 40-3
40
6467
15.0
3237
4.5
1200
2.7
S 50-3
50
7651
17.5
3825
5.2
1200
2.7
S 60-3
60
7651
17.5
3825
5.2
1200
2.7
S 61-3
60
7651
17.5
3825
5.2
1200
2.7
S 75-3
74
9418
22.0
4709
6.4
1200
2.7
S 100-3
101
10830
25.0
5415
7.4
1200
2.7
S 101-3
101
11772
27.0
5886
8.0
2000
4.9
S 125-3
121
18834
44.0
9417
12.7
2000
4.9
S 150-3
147
18834
44.0
9417
12.7
2000
4.9
SF 60-3
60
7651
17.5
3825
5.2
1200
2.7
SF 100-3
101
10830
25.0
5415
7.4
1200
2.7
SF 150-3
147
18834
44.0
9417
12.7
2000
4.9
1)
The cooling air requirement is based on a 7°F-difference between the ambient temperature and the outside temperature.
Table 3.1: Cooling air demand, cross-sections of openings and ducts required