Viessmann LB1 - Page 55

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Enabling required
Function Parameter Setting
Enabling for processing of analogue signals
at the ventilation unit intake
"Function, input 1 C1B0" "1"
CO
2
concentration control "Min. voltage, input 1 C1B1" "40" (≙ 4 V)
Humidity control "Min. voltage, input 2 C1C1" "80" (≙ 8 V)
Vitovent 300-W: CO
2
control in the room
Example:
Sensor 1:
At CO
2
concentrations in the room of between "CO2
sensor 1 min PPM C1C8" and "CO2 sensor 1 max
PPM C1C9" 1200 ppm, the air flow rate is continu-
ously adjusted depending on the measured CO
2
con-
centration.
For the other CO
2
sensors, the control limits can be set
individually.
Enabling required
Function Parameter Setting
Enabling the CO
2
sensors connected to X17
on the controller PCB
"CO2 sensor C106" "1"
Control limits of the connected CO
2
sensors
CO
2
sensor Lower control limit Upper control limit
1 "CO2 sensor 1 min PPM C1C8" "CO2 sensor 1 max PPM C1C9"
2 "CO2 sensor 2 min PPM C1CA" "CO2 sensor 2 max PPM C1CB"
3 "CO2 sensor 3 min PPM C1CC" "CO2 sensor 3 max PPM C1CD"
4 "CO2 sensor 4 min PPM C1CE" "CO2 sensor 4 max PPM C1CF"
Central humidity control
If the humidity in the central extract air duct (header)
increases, "Intensive mode" is switched on. The orig-
inal ventilation level is reapplied once the humidity has
been reduced. The response characteristics of this
humidity control are set via "Sensitivity, humidity
sensor C1A6".
Enabling required
Function Parameter Setting
Central humidity sensor "Humidity sensor C105" "1"
Sensitivity "Sensitivity, humidity sensor C1A6" ≠ "0"
Function description
Mechanical ventilation with Vitovent 300-C/300-W (cont.)
5816558
Functions