Set Appliance State:

Gas On
WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Observation:

Apply a CH demand to the appliance.
Allow fan to run and boiler to fire and flame to establish.
Remove demand and allow boiler to shut down.
Reinstate the CH demand a delay of approximately 2 min before boiler re-fire is expected.