Set Appliance State:

Mains Power Off
Mode selector switch to Off/Reset position
Turn Hot Water Tap On
Hot water temperature control set to maximum
WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Measurement:

Mode selector switch to DHW position.
Allow fan to run and burner to ignite.
With a flow rate of 11.5 litres/minute at the tap is there a temperature rise of 35°C and is operation satisfactory?