Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
Turn Hot Water Tap On
Attach U gauge to the burner pressure test point
Remove wires from modureg and make safe
WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Observation:

During the sparking stage of the ignition cycle
measure the burner pressure.
It should be set as per the table.
Is the ignition burner pressure set correctly?
Note:
When pressure gauge is removed the pressure test point should be tightened and checked for gas tightness.