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

Measurement:

Allow burner to ignite and establish.
Is the maximum burner pressure 12.2mb +/- 0.5mb (N.G)?
Notes:
1. Maximum Propane: 36.2mb. Maximum Butane 28.3mb.
2. Burner pressure will ramp up during ignition sequence then may go down, allow burner to fully establish before checking burner pressure.
3. When pressure gauge is removed pressure test point should be tightened and checked for gas soundness.