Caladair EVERSKY 500 Installation And Commissioning Manual page 45

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EVERSKY
The CO2 sensor is placed in the extract air circuit (see chapter VII.1 General composition) and must not be moved.
Ambient air naturally contains a variable share of CO2 depending on where you are located. This concentration is usually always
above 300ppm for an extra-urban location and can exceed 700ppm for a very dense urban location.
The output signal of the CO2 sensor is therefore never zero and should normally always be greater than 3V. In the case, conversely,
have
it is possible that the probe or connectors a problem.
Visual representation of the CO2 probe and electrical connection terminals
The 24Vac power supply is between terminals (7) and (8) and the analog signal 0-10V output is located on the terminal (2).
MS-CDF-019 – Manufacturing Nr: 220001→ Version B Update: 2022/06/14 45/70