Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Remove the wires from terminals 1 & 2 on M2 and make safe
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Observation:
Does the boiler still fire with no demand?
Isolate as per TOPs P4
and refit as necessary