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
Is the DHW operation satisfactory?
Note.
1. Flow rates higher / lower than specified will result in a higher or lower temperature rise, this must be taken into account when selecting the outcome of this test.
2. To investigate a poor flow rate click HERE.