What is Spill zone? What is this little S that pops upon my controller?

An important safety feature with AirTouch.

Spill Zone is a safety feature on our controllers that is designed to prevent damage to your installation from unwanted pressure building up in your duct in the roof space. If you turn off too many zones or close them off too much, AirTouch or ZoneMaster will open the designated spill zone and send air to it, in order to prevent unwanted pressure building up that could cause damage.

You will know if Spill Zone is active on your touch screen controller because a little S will appear next to the designated zone name to indicate it is on. It is a normal safety feature. When you open up other zones, the S will disappear as Spill Zone will no longer be required.

The system software is always monitoring, and will turn Spill Zone on when required.

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