Set Appliance State:

Mains Power Off
DHW Demand
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.
Is the temperature rise approximately per the table?
Note: Flow rates lower than specified will result in a higher temperature rise and this must be taken into account when selecting the outcome of the test. To investigate a poor water flow rate from the tap CLICK HERE.