5.6.
Control Using a CO
2
Sensor
A CO
2
sensor is used to control the air handling unit inde-
pendent of the room’s CO
2
level. The air flow can either be
(1) controlled by the CO
2
sensor, or let the unit’s complete
operation be (2) controlled by the CO
2
sensor.
1. Air Flow Control
Air flow in [%]
[ppm]
CO
2
level
The unit can be set to run with a reduced standard air
volume (min.) for basic ventilation.
If the CO
2
level in the room exceeds the programmed lower
limit (A), the CO
2
sensor will cut in and increase air volume. If
CO
2
levels continue to rise, the air volume will be increased
linearly up to the maximum volume (max.) at the upper CO
2
limit (B) and above.
Between the CO
2
level upper and lower limits, the air flow is
increased and reduced fully automatically between standard
and maximum air flow.
If the CO
2
level falls to the programmed lower limit (A) or
below, the unit will run with the standard air flow again.
To use this function, the standard air flow has to be reduced.
See “Standard air flow” on page 18.
2. Start, Stop and Air Flow Control
Air flow [%]
[ppm]
CO
2
level
If the unit is completely controlled by the CO
2
sensor, it will
start with a little more than the standard air volume (min.
+x) when the CO
2
level exceeds the programmed lower limit
plus 10 % (A + +10%).
If CO
2
levels continue to rise, the air volume will be increased
linearly up to the maximum volume (max.) at the upper CO
2
limit (B) and above.
Between the CO
2
level upper and lower limits, the air flow is
increased and reduced fully automatically between standard
and maximum air flow.
If the CO
2
level falls below the programmed lower limit (A),
the unit will stop again.
To use this function, the CO2 sensor has to be programmed
as a start parameter using the “Startup guide”, Airlinq User
Tool or Airlinq Service Tool.
Factory settings:
Lower limit A:
500 ppm (Min CO
2
PPM).
Upper limit B:
900 ppm (Max CO
2
PPM).
min:
20, 30 or 40% (Min air flow)
max:
100% (Max air flow).
Settings can be made using the control panel menu points
“Standard air flow” (see page 18) and “Startup guide” (see
page 19), Airlinq User Tool or Airlinq Service Tool.
24
0
A A+10%
B
min
max
min+x
0
0
A
min
max
0
B
Summary of Contents for AML 100
Page 39: ...39 Notes ...
