10
Appendix 2
Calibration of CO
2
sensor
Important Notice : This step is not required for a new unit (factory calibrated).
Verify CO
2
sensor precision by exposing your unit to outdoor air every 6 months
(correct value stands between 300 and 500 ppm).
If you need to calibrate the sensor, please follow these instructions. At any time be-
fore the last step, the calibration procedure can be cancelled, causing the controller to
return to normal operation.
WARNING : Each zone sensor
must be calibrated separately
IS CALIBRATION NEEDED? First select
zone #1 or #2, then expose the corresponding
remote sensor to outdoor air for a minimum
of 5 minutes, fresh air being used as a refer-
ence. If the value on screen is around 350 to
450 ppm, YOU DO NOT NEED TO
RECALIBRATE THE SENSOR OF THIS
ZONE.
CALIBRATION IS NEEDED : Click knob
repeatedly until “Set-Up & Cal” indicator
turns ON.
Press knob and keep it pressed for about 5
seconds, until light indicator begins to flash
and “CAL“ appears on screen.
1.
2.
3.
——
Set-up & Cal
——
Set-up & Cal
Let button go, “CO
2
CAL“ appears on
screen, click knob again, then 400 will
appear on screen to remind you that you need
to place the unit in fresh air before starting
the calibration. If your controller is not in
fresh air condition, just click knob to abort
calibration.
STARTING CALIBRATION : press knob
and keep it pressed for at least 5 seconds,
until “CAL” shows up on screen, then let
button go.
Automatic calibration will take a few
seconds to complete: “CAL GOOD“ will
appear on screen for 5 seconds, and controller
will return to normal operation automatically
4.
5.
6.
