Engine 2014: Motor Plants and Auxiliary Boilers

1. A A temperature sensing device opens the circuit breaker in the burner motor.
2. B The high limit control secures power to the entire oil firing system.
3. C The stack relay actuates the low limit control which breaks the ignition circuit.
4. D The stack relay secures power to the high voltage side of the ignition transformer.

Tip: press A-D to answer