CO
2
sensor
You can purchase a CO
2
sensor as an accessory if you want to control the fan speed level in accordance
with the CO
2
level in the dwelling.
CAUTION
Always disconnect the power supply to the unit before opening its doors or working on its
electrical installations.
Connecting the CO
2
sensor in the unit:
1. Pull out the upper front panel at the top, lift up and
detach it.
2. Loosen the thumb screws and remove the filter door.
Remove the screw in the middle so you can detach the
lower door.
Remove the screws and detach the cover plate.
3. Mount the CO
2
sensor in the metal shelf under the
extract air filter using the self-drilling screws (supplied
with the CO
2
sensor kit).
4. Run the wire from the CO
2
sensor through the cable
grommet to the automation.
Install the power supply box in the automation
compartment in the unit (predrill holes for the two screws
supplied).
5. Connect it up in accordance with the wiring diagram.
18
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