Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Turn Hot Water Tap On
Attach a U-gauge to the gas valve burner pressure test point
Remove one of the leads from the modulating solenoid (blue wire)
and make safe
Remove one of the leads from the modulating solenoid (blue wire)
and make safe
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Measurement:
Allow fan to run and burner to ignite.
Does the burner fully cross light and remain alight at approximately
minimum pressure (refer to table) and does ignition sparking cease?
Notes:
1. Sparking may continue for approximately 8 seconds if burner does not establish
then lockout will occur this can be reset by turning mains power to boiler off and on again.
2. When U-gauge is removed pressure test point should be tightened & checked for gas soundness.
Does the burner fully cross light and remain alight at approximately
minimum pressure (refer to table) and does ignition sparking cease?
Notes:
1. Sparking may continue for approximately 8 seconds if burner does not establish
then lockout will occur this can be reset by turning mains power to boiler off and on again.
2. When U-gauge is removed pressure test point should be tightened & checked for gas soundness.
