Set Appliance State:

Mains Power Off
DHW Demand
DHW temperature control set to max
Gas On
WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Measurement:

Allow boiler to ignite and run on DHW.
With a flow rate at the tap of approximately 16.4 litres/min is there a temperature rise of approximately 35° C and is operation satisfactory?