airmaster CV 80 - PIR Sensor Control for Unit Operation; CO2 Sensor for Air Quality Control

25
0 A A+10% B
min
max
min+x
0
0
A
min
max
0
B
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 ow 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 ow in [%]
[ppm]
CO
2
level
The unit can be set to run with a reduced basic 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 increase the air ow. If CO
2
levels
continue to rise, the air ow 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 ow
is increased and reduced fully automatically between basic
and maximum air ow.
If the CO
2
level falls to the programmed lower limit (A) or
below, the unit will run with the standard air ow again.
To use this function, the timer ow or the default ow has
to be reduced. See “Timers” on page 17 or “Default ow”
on page 19.
2. Start, Stop and Air Flow Control
Air ow [%]
[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 ow (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 ow will be increased
linearly up to the maximum air ow (max.) at the upper CO
2
limit (B) and above.
Between the CO
2
level upper and lower limits, the air ow is
increased and reduced fully automatically between standard
and maximum air ow.
If the CO
2
level falls below the programmed lower limit (A),
the unit will stop again.
To use this function, the CO
2
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: 30% (Min air ow)
max: 100% (Max air ow).
Start pri. 7 CO2.
Settings can be made using the control panel menu points
“Default air ow” (see page 19) and “Startup guide” (see
page 20), Airlinq User Tool or Airlinq Service Tool.