Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
CH Demand
Attach temperature clamp to flow pipe on right hand side of boiler
WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Observation:

Allow the boiler to ignite and run on central heating operation.
Turn the temperature control to the "e" position - approximately 65°C.
If the flow temperature is already at 65°C or above the boiler should either maintain flow temperature or shut down, if flow temperature is below 55°C the boiler should continue to increase flow temperature to approximately 65°C then either maintain the flow temperature or shut down.
Notes:
1. To reduce the time taken for this test, reduce the heating circuit by turning off some radiators.
2. If the flow temperature is already at 65°C or greater the boiler should not fire until temperature reduces and then either maintain flow temperature or shut down as described above.