Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Ensure secondary heat exchanger is cool and there is a
demand for Preheat
Turn OFF the flow and return isolation valves underneath the boiler
Turn hot water tap ON
demand for Preheat
Turn OFF the flow and return isolation valves underneath the boiler
Turn hot water tap ON
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Observation:
Allow the fan to run and the burner to ignite.
Does the preheat operation complete?
Does the preheat operation complete?
