IO Hvac Controls MUA 06 Damper Kit Els PW 29614 Key Benefits: Precision Engineered CxCxC Connections: Key Benefits: Precision Engineered CxCxC Connections: Ensures a seamless copper to copper fit for consistent fluid dynamics in large diameter piping it prevents rapid cycling and maximizes the efficiency of indirect fired heaters Contractors should use the adjustment screw on the differential pressure switch to set the activation point just above the dormant static pressure of the house the sensing probe should be installed in a neutral location away from direct supply registers to accurately detect the drop in building static pressure