14 - EN
Operation
Users can select one of 4 ventilation settings us-
ing the button on the main control unit: absent,
present, maximum or “Auto CO
2
”. The setting se-
lected is indicated by a blue LED. The ventilation
is automatically controlled in the “Auto CO
2
” set-
ting based on the CO
2
concentration. When only
the main control unit is used, this relates exclu-
sively to the CO
2
levels in the living room. If the
upgrade sensors are also used, then this highest
CO
2
concentration is normative for the ventilation
volume. The upgrade sensor does not function as
a control unit and is only intended to monitor CO
2
levels in a living area. There are 3 LED indica-
tors on the sensors which display the CO
2
levels:
■
Green (<1200ppm);
■
Orange (1200 – 1500ppm);
■
Red (>1500ppm).
Residents are advised to open a door or window
if the red LED lights up. Furthermore all gaps un-
der doors - which are essential for effective ven-
tilation - as well as the position of window grat-
ings (if fitted) must be checked.
Malfunction
The following malfunctions can occur:
■
The green, orange and red LEDs flash. The
3-position switch on the main control unit
still works. The CO
2
sensor is defective or
seriously contaminated. Clean the CO
2
sen-
sor or replace it;
■
The red LED flashes, while the green or
orange LED is constantly illuminated. The
sensor cannot establish a connection with
the ventilation unit. Check the distance and
for the presence of any large metal obsta-
cles between sensor and ventilation unit.
Maintenance
The CO
2
sensors are maintenance-free through-
out the entire lifespan. The operation can be in-
terrupted by contamination of the air channels.
Remove the dust from the casing and from the
air channels where required.
Specifications
CO
2
RF main control unit and
CO
2
RF upgrade sensor
■
Power supply: 230V±10%, single-phase,
50Hz;
■
Minimum ambient temperature: -10°C;
■
Maximum ambient temperature: +40°C;
■
Humidity (continued): 85% (electronics),
non-condensing;
■
Functional measurement range 400ppm -
2000ppm;
■
Sensor malfunction if measurement value is
<300ppm or >10000ppm;
■
Target value 1050ppm;
■
Output signal 0%RF-100%RF, proportional;
integrating subject to target value deviation;
■
Unit consumption: typically < 1W;
■
Degree of pollution: 2;
■
Peak voltage: 4 kV;
■
Protection class: II in compliance with
EN60730-1;
■
IP classification: IP30 in compliance with
EN60529-1;
■
Type of regulator: RS type 1.
