Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
CH Demand
Remove OpenTherm connections from 11 & 12 on X4 and make safe
Fit a wire link between connections 11 and 12 on X4
Fit a wire link between connections 11 and 12 on X4
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Observation:
Does the boiler now respond to CH demand?
Isolate as per TOPs P4
and refit as necessary