17 Slimline
Series
Pressing the button once will place the thermostat in frost protect mode.
In this mode, the thermostat will display the frost icon and will only turn the heating
on should the room temperature drop below the set frost temperature (see page 19).
Should the heating be turned on whilst in frost protect mode, the flame icon
will be displayed.
To cancel the frost protect mode, press the button once again.
Frost Protect Mode Enabled
Frost Protection
