Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Turn Hot Water Tap On
Attach a temperature clamp to the flow pipe as indicated by the red arrow
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Observation:
Allow the burner to ignite and establish for DHW.
Turn the hot water tap OFF.
Monitor the temperature of the appliance and the radiators as the preheat operates.
The temperature of the appliance should reach approximately 60°C and then the burner should shut down. When the tap LED extinguishes the preheat cycle is complete (this can be up to 1 minute after the burner extinguished).
While the boiler completes preheat the radiators should not start to heat up.
Does the preheat operate correctly?
Turn the hot water tap OFF.
Monitor the temperature of the appliance and the radiators as the preheat operates.
The temperature of the appliance should reach approximately 60°C and then the burner should shut down. When the tap LED extinguishes the preheat cycle is complete (this can be up to 1 minute after the burner extinguished).
While the boiler completes preheat the radiators should not start to heat up.
Does the preheat operate correctly?
