Set Appliance State:

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

Measurement:

Operate the boiler in its DHW mode with flow rate at tap approximately 6.25l/min.
Is there a water temperature rise of approximately 50 deg C?