Humidity - Demand Control - SystemAir VEF 1 Betriebs- Und Wartungsanleitung

16 | Accessories
Installation and connection
1. Remove the cover of junction box (pos. 1) by turning four locks in each corner from position 1 to 0.
2. Pull out potentiometer connected to sockets 2, 3 and 4 on the terminal block.
3. This step can be skipped if power supply is already connected.
Lead the power supply cable through the hole on the side of junction box. Connect wires to the terminal block accord-
ing to wiring diagram.
4. Connect red wire (+10V) from the accessory to socket 4 on the terminal block.
5. Connect blue (GND) wire from the accessory to socket 2 on the terminal block.
6. Connect control input (1–10V) wire from the accessory to socket 3 on the terminal block.
7. Place back the cover of junction box and lock it.
Cupboard fans can be controlled with an external controller now.
8.1.3

Humidity - Demand control

The controller compares room humidity with an adjustable set point (SW1) and regulates a 0..10 V output signal applied
to a ventilator with a proportional algorithm in direct or reverse action based on jumper JP1 setting, significantly reduc-
ing energy consumption to maintaining indoor climate.
Component/product — Article number:
• EC-Basic-H humidity — 24807
Fig. 5 Controller connection
Fig. 6 Controller connection
GB
211877 | A006