Set Appliance State:

Mains Power Off
CH Demand
ON/OFF switch in ON position
CH temp selector to MAX
DHW temp selector to MIN
WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Observation:

Allow boiler to ignite under heating demand.
Remove heating demand and allow burner to shut down.
Re-instate heating demand.
Is there a delay of 1 - 5 minutes before the boiler re-ignites?