Set Appliance State:

WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Observation:

1. To activate Maximum output press the chimney sweep button (see note) for a few seconds, the chimney sweep icon will illuminate (blinking).
2. Using the installer +ve key, increase the boiler output to maximum indicated
by the power scale icon.
Note.
A first key press will illuminate the display only, chimney sweep mode will automatically cancel after 15 minutes or if the chimney sweep button is pressed again.