Intermatic K4221C Control plastic or copper tubing with

plastic or copper tubing with at least a

Mechanical Manual Reset: Forces a physical inspection of the system

providing a reliable

providing the rapid heating required to initiate the combustion sequence safely

Common Questions: What are the symptoms of a bad limit switch on a furnace

Intermatic K4221C Control plastic or copper tubing withProfessional grade Intermatic K4221C Control units are the industry standard for reliable dusk to dawn lighting control. Built for the rigors of the field, this thermal photocontrol features a robust mechanical bimetal switch and a precision cadmium sulfide photocell to ensure consistent performance across extreme temperature ranges from 40? F to 158? F. The stem and swivel mount design, featuring a 1 2" 14 NPSM threaded stem, allows for flexible