Set Appliance State:

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

Observation:

Allow boiler to ignite and run on DHW.
Manufacturers specification is with a flow rate of 8.0 litres/min through the appliance, a temperature rise of approximately 42°C is expected.

Note:
A lower flow rate will produce a greater temperature rise.
If you wish to investigate a poor DHW flow rate click HERE