Set Appliance State:
Gas Off
| Isolate Mains Power to appliance as per TOPs P4 |
Attach a pressure gauge to the inlet pressure test point
Ensure NO demands
Ensure NO demands
Gas On
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Observation:
Reset boiler if necessary.
With a standing pressure registered on the gauge turn OFF the appliances gas inlet isolation valve.
Turn ON the DHW tap and allow the ignition sequence to commence.
Monitor the gauge as the appliance attempts to ignite, the pressure on the gauge should be seen to drop away indicating the gas valve is opening.
Note:
1. The appliance will attempt ignition 5 times, repeat test from set appliance state as required until test outcome is determined.
2. When pressure gauge is removed the pressure test point must be tightened and checked for gas tightness.
With a standing pressure registered on the gauge turn OFF the appliances gas inlet isolation valve.
Turn ON the DHW tap and allow the ignition sequence to commence.
Monitor the gauge as the appliance attempts to ignite, the pressure on the gauge should be seen to drop away indicating the gas valve is opening.
Note:
1. The appliance will attempt ignition 5 times, repeat test from set appliance state as required until test outcome is determined.
2. When pressure gauge is removed the pressure test point must be tightened and checked for gas tightness.
Isolate as per TOPs P4
and refit as necessary