In many applications it is desirable that a fan continues to run for a period after it is switched off for maximum efficiency. Some examples are below:
In a bathroom, where a shower generates steam, it is useful to run the fan for a period after the shower is turned off, as this produces two desirable outcomes. The first outcome is that the room is fully purged of steam, minimising condensation and ensuring that internal finishes are not prematurely damaged. The second is when the timer eventually turns off the fan, the air inside the ducting and surrounding the fan’s motor will be dry, preventing mould build up and corrosion in the ducting.
Fantech ’s comprehensive range of run-on-timers includes:
VZ Model: The VZ24C and VZ6 feature run-ons of 24 and 6 minutes respectively and can be mounted into the motor “J” box or switch board.
VZ-TS Model: A direct wired unit that replaces the need for a power point or wiring junction box. This unit is adjustable from 2 to 10 minutes.
VZM Model: This model is designed to be used with a duct exhaust system controlled by up to three switches, for example the toilet, bathroom and laundry. Adjustments from 0 to 28 minutes are available.
VZ-PL Model: A plug in, quick and easy to install run-on timer that is fixed at 6 minutes. Supplied standard with a 900mm extension lead and pre-wired 4 pin plug that ensures an additional active is provided to power the fan after the standard switch is turned off.
VA-VZ Model: Incorporates a run-on of 6 minutes and speed control function that adjusts the fan speed between 100% and 30%. This unit is also fitted with a 900mm extension lead and pre-wired 4 pin plug which makes it easy to install.
Power Sense Module
It is easy to turn on the clothes dryer and forget to turn on the exhaust fan. To help overcome this problem, Fantech have introduced the VC-ISNSE power sense module which automatically turns on the fan by sensing when the clothes dryer is in operation, whilst avoiding excess power consumption if the fan is left on when it is not needed.
The VZ-ISNSE Power Sense Module can be used with a run on timer, which will purge the room of any moisture after the dryer is switched off.