Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Disconnect the wires as indicated by the red arrows and make safe
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Observation:
Does the boiler fire with no demand ?
Note:
The external controls may be wired into the terminal block different to that shown, therefore you may need to trace the wires for the external controls.
Note:
The external controls may be wired into the terminal block different to that shown, therefore you may need to trace the wires for the external controls.
Isolate as per TOPs P4
and refit as necessary