Set Appliance State:

Turn Hot Water Tap On
DHW temperature set to MAX
WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Measurement:

Allow the appliance to ignite and run for the DHW demand.
With a flow rate at the tap of approximately 12.5 litres/min is there a temperature rise of approximately 35°C and operation satisfactory?
Note.
A flow rate less than 12.5 litres/min will result in a higher temperature rise.