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System Reliability: Restores proper flame sensing to eliminate nuisance trips and burner short-cycling caused by carbon buildup or sensor fatigue
Use mounting clips or wire ties to secure the copper tubing
Designed as a normally closed actuator
preventing coil freeze-ups or overheating during power interruptions
By keeping the lubricant at a temperature 15°F to 25°F above the system’s saturated suction temperature
Schneider Electric (Barber Colman) MK-4821 Pneumatic Valve Actuator Els PW 17895 System Reliability: Restores proper flameThe Schneider Electric MK 4821 is a professional grade pneumatic valve actuator designed for the precise positioning of 1 1 2" to 2" VB 9XXX series globe valves in commercial HVACR systems. Built for the rigors of mechanical rooms, this actuator features a rugged die cast aluminum housing and an 11 sq. in. effective diaphragm area. It operates on a proportional pneumatic signal with a nominal 8 to 13 psi spring range, ensuring reliable spring return
