Set Appliance State:

Mains Power Off
Isolate Mains Power to appliance as per TOPs P4
DHW Demand
Selector Switch to Hot Water and Heating
Remove combustion testing point cap from boiler
Gas On
WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Observation:

Carry out a FGA test at maximum and minimum rate in accordance with manufacturer’s instructions and operational procedures.
Refer to ADAPT for more information.