CO
2
control
ATTENTION
A CO
2
sensor is not standard in all units, but may be purchased as an accessory.
If the occupancy varies greatly, it may be better to control ventilation by the CO
2
-level in the extract
air. This function is often used in offices and schools where loadings vary greatly during the day and
from week to week.
Ventilation
CO2 settings
↳
CO2 level, fan speed level 2 Settings:
Standard setting:
Description:
400 ↔ 800 ppm
600 ppm
This shows the minimum CO
2
-level at which the unit is
to switch to fan speed level 2.
At the lowest CO
2
-level, the unit runs at fan speed
level 1.
↳
CO2 level, fan speed level 3 Settings:
Standard setting:
Description:
800 ↔ 1200 ppm
1000 ppm
This shows the minimum CO
2
-level at which the unit is
to switch to fan speed level 3.
↳
CO2 level, fan speed level 4 Settings:
Standard setting:
Description:
1200 ↔ 1600 ppm
1400 ppm
This shows the minimum CO
2
-level at which the unit is
to switch to fan speed level 4.
Prioritisation sequence in the control system:
1. Userprogram 2 and 1 with high priority for ventilation
2. High ventilation in connection with cooling
3. Low ventilation in connection with low outdoor air
temperature
4. Low air humidity
5. High air humidity
6. Userprogram 2
7. Userprogram 1
8. CO
2
level (accessory)
9. Manually set values
10. Weekprogram
20