Set Appliance State:

Mains Power Off
Gas On; Pilot On
Turn Hot Water Tap On
Rotary Switch to DHW position
Hold in Boiler Case Switch
WARNING! Mains voltage is expected during test, follow TOPs P4 live testing procedure
Mains Power On

Observation:

Press Pilot Off button and wait until Pilot has extinguished. Press Ignition button (do not hold in Gas Control Valve) and confirm Pilot does not re-ignite.