Installation And Commissioning - S+S Regeltechnik AERSAGARD RCO2-A NT Notice D'instruction

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Installation and Commissioning

ATTENTION !
The minimum CO concentration of outside air in leafy, hardly industrialised areas is approx. 350 ppm. The gas inter-exchange in the sensor element
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happens by diffusion. Depending on the changes to the concentration and the flow velocity of the air surrounding the sensor, the reaction of the device
to the change of concentration may take place with a delay. It is essential to choose an installation location for the device in which the air stream flows
around the sensor. Otherwise the gas exchange may be considerably delayed or prevented.
Automatic calibration of the carbon dioxide measurement – (default)
The automatic background logic is a self-calibrating mechanism that is suitable for use in applications in which the CO
to fresh air level (350 - 400 ppm). This should typically happen attimes during which the rooms are unoccupied. The sensor reaches its normal
accuracy after 24 hours of continuous operation in an environment which has been exposed to a fresh air supply of 400 ppm CO
error remains minimal with at least 4 cases of sensor exposure to fresh air within 21 days. The device needs continuous operating cycles of more
than 24 hours to operate correctly
Manual calibration of carbon dioxide measurement
Sufficient fresh air (CO content = 500 ppm) must be provided before and after the calibration procedure!
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The calibration procedure is started by pressing the "ZERO" button (for approx. five seconds).
This is signalled via the flashing LED.
Then calibration takes place. During this phase, the LED is continuously active and a 600 second countdown runs.
The LED is deactivated after successful calibration.
Putting in operation
After switching on the device, a self-test and tempering period follows.
This procedure takes 30 - 50 minutes depending on ambient conditions.
Manual calibration can then be performed as an option.
Make sure that no harmful substances influence the calibration process and that the sensor is operated in fresh air.
Traffic light indicator
CO content LED 1
2
in ppm green
350 20 %
416 40 %
482 60 %
548 80 %
614 100 %
680
746
812
878
944
1010
1076
1142
1208
1274
1340
1406
1472
1538
1604
1670
1736
1802
1868
1934
2000
3000
Once the aforementioned values have been reached, the respective LED beco-
mes active (with increasing luminosity of 20 %, 40 %, 60 %, 80 % and 100 %);
LEDs that are already active continue to be illuminated.
LED 2 LED 3 LED 4
green yellow yellow
– – –
– – –
– – –
– – –
– – –
20 % – –
40 % – –
60 % – –
80 % – –
100 %
– –
20 % –
40 % –
60 % –
80 % –
100 % –
20 %
40 %
60 %
80 %
100 %
RCO -A NT
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LED 5
red
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
LED Recommendation
–
1 green :
–
no action required
–
2 green :
–
prompt airing recommended
20 %
40 % 3 yellow :
airing recommended
60 %
80 % 4 yellow :
airing required
100 %
5 red :
intensive airing necessary
Rev. 0000 - V10
concentration regularly drops
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. The deviation
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RCO -A NT
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