Module M11 · Track 4 Appliances & controls
Gas safety devices & controls
The devices that keep appliances safe, how they work and how to test them.
Lessons for this module are being written. The outcomes and topics below show what it will cover.
Learning outcomes
By the end of this module, learners can:
- M11.1Explain how thermoelectric and flame-rectification flame supervision devices work, and test them.
- M11.2Describe the operation of multifunctional gas valves, solenoid valves and governors.
- M11.3Explain atmosphere-sensing and spillage-monitoring devices and when they operate.
- M11.4Describe fan-proving and overheat controls and recognise common faults.
Topics
- 11.1
Flame supervision: thermoelectric
Thermocouples and magnetic valves, and how to test drop-out.
In preparation1 artefact - 11.2
Flame supervision: flame rectification
How the flame itself proves ignition in modern appliances.
In preparation1 artefact - 11.3
Gas valves, solenoids and governors
Multifunctional gas valves, solenoid valves and appliance governors.
In preparation1 artefact - 11.4
Atmosphere-sensing and spillage devices
Oxygen depletion pilots and spillage-monitoring devices.
In preparation1 artefact - 11.5
Fan proving and air pressure switches
How fanned appliances prove airflow before they ignite.
In preparation1 artefact - 11.6
Thermostats, limit stats and ignition
Temperature controls, overheat protection and ignition systems.
In preparation