Setting Ventilation Level; Setting Brightness; Maintenance - Zehnder CO2 Sensor Manuel De L'utilisateur

A number of important conditions must
be met to ensure the ventilation system
functions properly:
■ Do not place objects such as for
example cabinets in front of the control
unit.
■ Ensure a sufficient supply of air. For
example, open a small window or any
trickle vent in a window, window frame
or sliding door.
■ If the home is fitted with non-lockable
air openings, such as trickle vents above
the windows or gaps under doors, then
leave these open. Do not cover or block
them.
■ Ensure that there is no powered
extractor hood connected to the
ventilation system.

4.1 Setting ventilation level

A manual ventilation mode cannot be set on
all control units. This is only possible on a
control unit set by the installer as the main
control unit or as a CO
In manual ventilation mode,
ventilation is not controlled on the
basis of the CO
A manual ventilation mode
remains active for up to 12 hours.
1. If indicators are on full: Press the
operating button briefly.
- The indicators will fully light up.
2. Briefly press the operating button to
select a different ventilation level.
3. Repeat step 2 until the indicators of the
desired ventilation level light up.
If only the CO indicator is lit, the control unit
2
is set to automatic ventilation.
controller.
2
levels.
2

4.2 Setting brightness

The brightness of the indicators can be set
to the following levels:
bright, high, medium, low, warning, off.
The default setting is: warning - the CO
indicator only shows increased CO
malfunction alerts.
1. Press the operating button for 5
seconds.
- All the indicators flash green 3x.
- The bottom (RF) or middle (0-10 V)
indicator in the right column flashes
red.
2. Briefly press the operating button within
30 seconds.
- The top indicator in the right column
flashes red.
3. Press the operating button for 5
seconds.
- All the indicators flash green 3x.
4. Briefly press the operating button to
select a different brightness level.
5. Repeat step 4 until the indicators of the
desired brightness light up.
6. Press the operating button for 5
seconds.
- All the indicators flash green 3x.
5

Maintenance

Regularly remove dust from the control unit
with a dry duster or a vacuum cleaner.
Do not clean using water.
Ensure that the
associated ventilation system is also carried
out as stated in the relevant manual.
level or
2
maintenance of
EN - 21
2
the