Vent-Axia Multihome BEP Instructions D'installation page 17

1. MEV Unit – Internal sensor
Step 1 can be done by either Exposure method or Measurement method, the baseline step 2 is
actioned once either step 1 options are complete.
1.1 Exposure method step 1
Exposure method assumes that the outside CO
which the MEV extracts air from, the Rooms must be well ventilated by opening any external
windows and doors for 10 to 15 minutes. The room must remain well ventilated and unoccupied
until after the baseline step has been actioned.
1.2 Measurement method step 1
If the Engineer has a calibrated CO
to the CO meters instructions within the rooms the MEV extract air from. Measurement taken
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from each room should be recorded and then averaged.
Example; Room 1 – 450ppm + Room 2 440ppm + Room 3 – 460ppm = 1350ppm / 3 = 450ppm
The averaged value is then used during the baseline step.
1.3 Baseline step 2
MEV On-Board display method
Within the MEV menu there is rEF which has a default value of 40 (=400ppm), if using the
Exposure method of calibration this does not need to be changed.
For the Measurement method of calibration, the value within rEF should be changed to the
recorded average PPM, using the example value this would be 45 (=450ppm).
With the rEF value set as required, the user should navigate to the cAl menu and use the
up/down arrow to select y (=Yes). The status LED will start blinking Magenta colour signifying
the start of the calibration, the MEV will repeatedly read the CO
a stable reading, once the status LED stops flashing the Calibration value has been set.
MEV Mobile App method
Once the app is connected to the MEV navigate to the CO
the CO screen enable Set CO
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An additional slide bar will appear with a default value set to 400ppm, if using the measurement
method, the value should be changed to match the measured averaged recorded PPM, using
the example value this would be 450ppm. For the Exposure method the value should be
unchanged at 400ppm.
With the value set the Save button should be pressed in the top right of the screen to start the
calibration process, the status LED will start blinking Magenta colour signifying the start of the
calibration, the MEV will repeatedly read the CO
reading, once the status LED stops flashing the Calibration value has been set.
2. Room Sensor Calibration
The Room sensor can only be calibrated using the Exposure method and will have Auto
Background Calibration (ABC) by default.
2.1 Exposure method Step 1
Exposure method assumes that the outside CO
the Sensor is fitted, the room must be well ventilated by opening any external windows and
doors for 10 to 15 minutes. The room must remain well ventilated and unoccupied until after the
baseline step is complete.
2.2 Baseline method – Step 2
With the Room sensor paired to the system the status LED will be Green when the button is
pressed, in this condition the button should be pressed and held (8 Seconds) until the status
LED is Magenta, the button should then be released and the LED will be blinking Magenta to
signify the start of the calibration process, the room should be unoccupied once the calibration
has started and should remain so for 5 minutes. During the calibration process the Room
sensor will repeatedly read the CO
status LED stops flashing the Calibration value has been set.
concentration is 400 PPM in the rooms in
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meter they simply need to measure the CO
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calibration at the bottom of the page.
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sensor for 3 minutes to obtain a stable
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concentration is 400 PPM in the room which
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sensor for 3 minutes to obtain a stable reading, once the
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sensor for 3 minutes to obtain
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screen from the home screen. On
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in accordance
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