60
DN 125
10
60
50
40
30
20
20
40
50 60
80
100
10
Pressure drop
in Pa
Air flow rate in m³/h
0
5
-5
-10
10
30
70
90
Fig. 85
A
Vent cone setting in mm
1.
Determine the required vent cone setting from the
diagram, taking into account the calculated pres-
sure drop and air flow rate for the individual sec-
tion.
Note
If the system settings have been calculated, set the
vent based on the calculation.
Example:
Engineering plans provide the following details for
the individual section:
■
Extract air vent for wall and ceiling installation
■
Pressure drop: 20 Pa
■
Air flow rate: 40 m
3
/h
Vent cone setting:
–
5 mm
2.
Select determined vent cone setting
A
at the
extract air vent for wall or ceiling installation.
3.
Record the actual value in the commissioning
report.
Commissioning, inspection, maintenance
Presetting supply air and extract air apertures
(cont.)
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