The Boost Button; Using The Heating Handset - Light Wave JSJSLW920 Instruction Manual

Manual Operation

The Boost button

Pressing the Boost button on the Boiler Switch raises the target
temperature several degrees above the current temperature for the
duration of one hour. If the target temperature is already several degrees
higher than the actual temperature, then pressing boost will simply match
this temperature.

Using the Heating Handset

A LightwaveRF Heating Handset can be linked to
a Boiler Switch via a Home Thermostat.
Once linked, the Standby button on the Handset will
toggle between Running and Standby modes in the
same way as the Standby button on the Switch. The
Boost button operates the Switch Boost button.
The plus and minus arrows on the handset will
raise or lower the target temperature a few
degrees above or below the current temperature.