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TF6401_E
Aereco S.A.
3.5. SENSORS
The DXA Unit Excellence version is compatible with two types of sensors for the management of
supply airflow: presence detection or CO
2
.
We recommend to use one sensor per main room (living room and bedroom).
- Presence sensors and CO
2
sensors can be mixed together.
- A maximum of 5 sensors can be connected to the system.
- The connection to the system is made through RJ12 wires. Only the specific ones supplied by
Aereco can be used.
3.5.1. PRESENCE SENSORS (DX S-PRE)
The DX S-PRE presence detector uses infrared radiation to measure movements made in a room.
The detector includes a LED indicator that displays the detections in order to inform the users.
When luminosity in the room is very low, the LED is automatically switched off.
The S-PRE sensor must be installed on the ceiling at a place it can easily detect the presence. The
operating scenarios are the following ones :
·if detection during the night, over ventilation for 45 minutes after the last detection.
·if detection during the day, over ventilation for 20 minutes after the last detection.
·if no detection, supply airflow is reduced to a minimum to save energy.
The sensor can be fixed in a hole of diameter 62 to 70 millimeters. They are equipped with claws
for installation in false ceiling. Location of sensors :
· ceiling positioning
· in a detection zone = zone located at least at 1 meter from walls (considered as zone "where
there are few movements")
· height installation ceiling position: up to 3.5 meters.
3,5 m max
3 m min
4,2 m max
1 m
2 m
3,6 m
2 m
2,8 m max
2,8 m max
«Dead» zone
Presence detector
