Set Appliance State:

CH Demand
Thermostat set to 6 (maximum)
WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Observation:

Allow the boiler to run in central heating mode and monitor the operation of the appliance and system.
Does the boiler and system operate satisfactorily?
If the optional manual overheat trips during operation click HERE.