DOL 434 LPV
Technical Manual
55
Adjust the pressure by making a curve course for the required pressure.
Negative pressure (Pa)
Air inlet (flap position) %
Nominal output
Outlet 25 %
53,200 m3/h
13,300 m3/h
Figure 18: Adjustment of negative pressure 1: Air inlet (flap position)
This negative pressure curve is ideal for a given system, depending on the type of winch motor used.
Exhaustion in % of nominal output
Air inlet (flap position) %
Outlet %
0
5
10
15
27
33
37
42
50
60
70
80
90
100
Side
0
1
8
16
20
28
33
40
50
60
70
80
90
100
Figure 19: Adjustment of negative pressure 2: Air outlet
To obtain this negative pressure curve, the relation between exhaustion and inlets could be like this.
The controller has different ventilation modes depending on the variant, for example, side, tunnel and roof. It is
possible to set up a ventilation course that switches between these ventilation modes to optimize the ventilation
for changing climatic conditions (e.g. air humidity, inside and outside temperatures). In areas with large fluctua-
tions in the outside temperature, the ventilation sequence can be optimized, from minimum to maximum ventila-
tion, by using one of the three ventilation modes: side, tunnel and roof.
Note that the controller does not regulate according to pressure as long as the pressure adjustment is taking
place. This is shown by a yellow marking on the page, as long as the controller is set up for pressure adjust-
ment. When no adjustment has been made for 30 minutes, the controller returns to automatic adjustment.
