Set Appliance State:

Mains Power Off
CH Demand
CH temperature control set to 50°C
ON/OFF switch ON
Attach temperature clamp to flow pipe
WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Measurement:

Allow system to reach the set operating temperature (50°C) then turn OFF CH demand, set CH temperature control to 70°C and reinstate the CH demand.
Using telegan temp clamps measure the temperature of the flow pipe close to the boiler, observe flow temp falling as system extracts heat.
Notes:
1. Anti-cycle time is preset at 20 minutes, but is dependent upon appliance temperature and can be less. This can be altered in the boiler parameters.
2. To speed up the heating of the system, reduce the circuit by switching off some radiators.