Set Appliance State:
Gas Off
| Isolate Mains Power to appliance as per TOPs P4 |
CH Demand
Attach a U-Gauge to the inlet pressure test point
Gas On
| WARNING! Mains voltage is expected during test, follow TOPs P4 live testing procedure |
Observation:
Allow the boiler to attempt to light, monitor the inlet pressure as the ignition sequence starts.
You should see a small dip in the pressure (approx. 2-3mb) as the boiler tries to light. The pressure should then stabilise a little below the standing pressure.
Note:
When pressure gauge is removed the pressure test point should be tightened and checked for gas tightness.
You should see a small dip in the pressure (approx. 2-3mb) as the boiler tries to light. The pressure should then stabilise a little below the standing pressure.
Note:
When pressure gauge is removed the pressure test point should be tightened and checked for gas tightness.
Isolate as per TOPs P4
and refit as necessary