Set Appliance State:

Mains Power Off
CH/HW switch in HW position
Ensure boiler is in pre-heat mode
Boiler switch in ON position
WARNING! Mains voltage is expected during test, follow TOPs P4 live testing procedure
Mains Power On

Observation:

Does the main burner shut down after the Pre-heat cycle
has brought the boiler up to its required temperature?
(Burner should shut down in approx 2/3 min)