Set Appliance State:

Mains Power Off
Turn Hot Water Tap On
CH Selector Switch OFF
Gas Control Knob in Main Burner position
Gas On; Pilot On
WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Observation:

Is there a 35 degree C rise in the Hot Water temperature for a flow rate of 14.4 litres per minute?