Set Appliance State:

Mains Power Off
CH Demand
Selector switch to DHW and CH position
CH temperature selector to Max
DHW temperature selector to Min
Gas On
WARNING! Mains voltage is expected during test, follow TOPs P4 live testing procedure
Mains Power On

Observation:

Allow system to heat to approximately 60 degrees C.
Turn CH Temp Selector to Min. (Burner should go out)
Turn CH Temp Selector to Max.
Is there a delay of approximately 1-3 minutes before burner re-ignites?