Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to DC Volts 
CH Demand
Connect a U-gauge to the Burner Gas Pressure Test Point.
Gas On
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Measurement:
Allow the fan to run and ignition sequence to commence. Monitor the U gauge the burner pressure should reach approximately 2 mb or greater and then drop to 0 when the voltage to the gas valve is present.
Does the gauge behave as above?
Note:
When gauge is removed pressure test point should be tightened and checked for gas tightness.
Does the gauge behave as above?
Note:
When gauge is removed pressure test point should be tightened and checked for gas tightness.
