Lumina 17
Explanation control functions
6
Determining the ventilation position
The control computer determines the use of air inlets, extra inlets and fans based on the combi-table. The example
below shows a combi-table with modulating fans. The relay fans will do 20.000 m3 each.
Ventilation Exhaust
Inlets
Position
MOD
Extra fans
Relay (0 – 1)
Cap.
Inlet
Extra
Pres-
sure
%
%
1
2
3
4
5
m3/h
%
%
Pa
M1
1
1
M
0
0
0
0
200
1
0
0
M2
20
100
M
0
0
0
0
20000
20
0
0
M3
21
50
M
M
0
0
0
21000
21
0
0
M4
39
99
M
M
0
0
0
39000
39
0
0
M5
40
100
1
1
0
0
0
40000
40
0
0
M6
60
100
1
1
1
0
0
60000
50
0
0
M7
75
100
1
1
1
1
0
80000
75
0
0
M8
100
100
1
1
1
1
1
100000 100
0
0
The ventilation level is expressed as a percentage. The control computer uses this percentage to find the required
ventilation settings in the combi-table. The control computer determines the ventilation % between two positions,
and controls the modulating fans using this.
Example: Taking ventilation positions from the combi-table
Required ventilation level: 30%. This value is precisely between positions M3 and M4.
The control computer uses the following fans:
•
Both fans are controlled on for 75% of the set cycle time (midway between M3 and M4). If the
ventilation level increases further, so will the modulation percentage.
•
Air inlet control depends on the settings. The control computer can open the air inlets 30% (midway
between positions M3 and M4). The inlet position can also be modulated between 21% and 39%.
2.1.5
Optimisation based on pressure
The control computer controls ventilation with fans (exhaust) and air inlets. The control computer takes the positions
from the combi-table. The combination of exhaust and inlet positions creates a certain under pressure in the house.
The required under pressure is in the combi-table. The control computer can influence position of the air inlets and
accurately control the pressure. (Optimization).
2.1.6
Natural ventilation
Part of the ventilation demand can be met using natural ventilation. During natural ventilation the fans are off. The
outside wind provides the air flow through the house. The entire combi-table is deactivated in the natural ventilation
phase.
Outside the natural ventilation range, ventilation is controlled using the fans. The inlets are opened based
on the values in the combi-table.
