Set Appliance State:

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

Observation:

Reset appliance if required.
(Press reset button once then release)
Allow fan to run and burner to ignite.
Inspect/verify with a FGA that all combustion circuit seals are intact and not leaking products of combustion, these include;
  • Burner door seal
  • Spark electrode gasket
  • Heat exchanger outlet seal
  • Condensate connections/seals
  • Flue seals