Set Appliance State:

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

Measurement:

Allow boiler to ignite and run.
Does the temperature rise conform approximately to the table on the right and is operation satisfactory?
Lower flow rates than that stated will result in higher temperature rises.
If you want to investigate poor DHW flow rate click HERE.