Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Ensure there are no demands from External Controls
Ensure no taps are running
Remove control box cover as necessary
Ensure no taps are running
Remove control box cover as necessary
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Observation:
Measure the voltage at the external controls into the boiler.
There should be no voltage from the external controls and no taps should be running i.e. no demands that could cause the boiler to fire.
There should be no voltage from the external controls and no taps should be running i.e. no demands that could cause the boiler to fire.
Isolate as per TOPs P4
and refit as necessary