11.5In preparation
Fan proving and air pressure switches
How fanned appliances prove airflow before they ignite.
This topic supports
- M11.4Describe fan-proving and overheat controls and recognise common faults.
The lesson text for this topic is being written. The learning outcomes above, and any artefacts below, show what it will cover.
Interactive artefact
Air pressure switch and fan proving
Fan, venturi and air pressure switch proving airflow before ignition is allowed.
Will demonstrate
- The fan creating a pressure difference
- The switch proving airflow
- Lockout when the flue or fan fails
Planned. This interactive will appear here when it's built.