Set Appliance State:

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

Observation:

Allow the burner to ignite.
Measure the minimum burner pressure, it should be as per the table.
Is the minimum burner pressure correctly set?
Note:
When pressure gauge is removed the pressure test point should be tightened and checked for gas tightness.