The vitiated air shall be extracted from the space using energy efficient constant pressure principle via a variable air volume motorised damper/grille installed in each area, as detailed in the schedule.
5 Sizes (100mm, 125mm, 150mm, 200mm diameters)
The extract fan shall automatically vary its speed as the system pressure varies; the variation in pressure is caused by the opening and closing of the Nuaire CVD extract damper. The damper is autonomous of the fan and requires no field wiring connecting it to the fan. The damper positions are open (boost) and closed (trickle). When the damper is closed, the grille will allow approx. 8 litres/sec flow rate, as background ventilation. The inline damper has an integrated airflow sensor which continuously monitors and controls the amount of air being moved. The air volume is adjusted via minimum and maximum potentiometers on the side of the CVD damper.
The duct mounted damper CVD requires a 230V connection/power supply. Signal from 230V switch live i.e. light switch, PIR, humidistat etc.
- Integral operating pressure adjustment (target pressure).
- BMS interface 0 - 10V.
- Volt free run & failure/status indication.
- 4no. low voltage sockets for interconnection of remote failure indicator.
Fan, integrated Ecosmart controls and associated sensors/controllers shall be manufactured by Nuaire.
- Optional trickle/boost flow rate.
- Externally adjusted settings.
- CVD helps balance system.