Set Appliance State:
Gas Off
| Isolate Mains Power to appliance as per TOPs P4 |
Attach pressure gauge to the inlet pressure test point
Gas On
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Observation:
Turn selector switch to heating and hot water position, ensure external controls are calling for heat and allow fan to run and ignition sequence to commence and burner to ignite.
Does the pressure gauge show an inlet pressure of 14 mb or greater
throughout the operation?
Note:
1. The manufacturer states the boiler range is able to deliver its full output at inlet pressures as low as 14mb, however please refer to British Gas Technical Operational Procedures for further guidance regarding gas inlet working pressures.
2. When "U" gauge is removed test point should be tightened and checked for gas tightness.
Does the pressure gauge show an inlet pressure of 14 mb or greater
throughout the operation?
Note:
1. The manufacturer states the boiler range is able to deliver its full output at inlet pressures as low as 14mb, however please refer to British Gas Technical Operational Procedures for further guidance regarding gas inlet working pressures.
2. When "U" gauge is removed test point should be tightened and checked for gas tightness.
Isolate as per TOPs P4
and refit as necessary