Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
CH Demand
Ensure the appliance is not in lockout
Remove the spark lead from the right connection of the spark
igniter and the earth lead from the left connection
Place the earth lead near the right hand connection as shown in the photograph
Mains reset switch On
WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Observation:

Stand clear of spark generator.
Allow fan to run and ignition sequence to commence.
A strong and consistent spark should be seen and heard from the exposed terminal.
WARNING!
There will be three attempts at ignition before boiler should go to lockout.