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The White Rodgers 3L09-20 Limit Switch is a professional-grade 1/2" bimetal disc limit control designed for high-limit temperature protection in forced air heating systems
This component is specifically calibrated for compatible Armstrong
The Maxitrol RV48-1/2 Regulator is a professional-grade appliance gas regulator engineered for precision in residential and commercial gas-fired equipment
contractors ensure exact physical fit and electrical calibration
which functions as a breather hole to eliminate the need for external vent piping in indoor installations
System Sensor 5621 Detector The White Rodgers 3L09-20 LimitThe System Sensor 5621 is a commercial grade dual circuit mechanical heat detector designed for high reliability fire detection in environments where traditional smoke sensors are prone to nuisance alarms. This 135F fixed temperature and rate of rise heat detector utilizes two independent circuits to trigger both local alarm systems and auxiliary devices like fans or door closers. The Rate of Rise (ROR) element responds to temperature increases