including CFC

ensuring signal accuracy

How do I adjust the height for my specific burner

protecting sensitive components from reverse flow

Once the unit has cooled

McDonnell & Miller 309100 Switch Els PW 29614 including CFCThe McDonnell & Miller 309100 Switch, also known as the Model Number 11 Switch, is a heavy duty replacement switch kit designed for field repairs of float type low water cut offs. Engineered for automatic reset operation, this unit features two SPST switches that allow for simultaneous control of a burner circuit and a secondary function, such as an electric water feeder or a low water alarm. It is fully compatible with Series 61, 64, 67, 69, 764, and