Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
CH Demand
Click here for important information regarding CH operation
CH temperature control turned to MAX
Attach a temperature clamp to the flow pipe as indicated by the red arrow
WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Observation:

Allow the 4 minute pump purge to complete.
Allow the burner to ignite and the system to heat, the boiler should
maintain and/or shutdown at approximately 75°C.
Monitor the appliance temperature on the FGA.
Note:
To reduce the time for this test the heating load
can be reduced by temporarily turning off some radiators.