Vent-Axia 498095, Installation And Wiring Instructions, Page: 6 / 12

Speed Selection
The trickle flow rate can be quickly adjusted via the dial as shown
– either with the
inner grille on or off (see below images). The 10-100% scale relates to a flow rate
of between 5-16l/s. The scale is adjusted based on the installation type (
SW1 ).
The boost speed is proportionally higher than the trickle flow rate.
Inner grille on: Inner grille removed:
Overrun Timer with Comfort mode
(Always enabled except for the first 5 minutes of mains power)*
The comfort mode feature offsets/delays the boost when the LS has been activated
(e.g. from switching the light on) until after the LS has been deactivated (up to a
maximum of 20 minutes). Therefore reducing any nuisance noise until after the
user has left the room.
When the LS is deactivated, fan will run at boost mode for the length of time the
LS was present (up to a maximum of 20 minutes) plus the standard 15 minute
overrun time.
If the LS was activated for less than 3 minutes, no boost will occur to prevent
nuisance activations.
If the LS is still connected after 20 minutes, the fan will boost anyway. Once the
LS is disconnected, the fan will run for only 20 minutes plus the 15min overrun
timeout.
The humidity sensor overrides this if humidity is detected. The fan will run as
described for the Humidity function.
*Comfort mode/overrun timer is disabled for the first 5 minutes the fan is powered
– to allow easy testing/checking of the LS signal from the light/other switch after
installation. After the first 5 minutes, the fan will function normally.