Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Disconnect the 4 wire connector from the integral timer and make safe
CH Demand
CH Demand
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Observation:
Does the boiler now react to the CH demand?
Isolate as per TOPs P4
and refit as necessary