McDonnell & Miller RS-1-BR-1 Holder R-410A if the internal slide is

if the internal slide is physically stuck or leaking

including those requiring the 7136 valve kit

Mechanical Integrity: Engineered for high-torque applications

This is a field-reversible damper actuator

McDonnell & Miller RS-1-BR-1 Holder R-410A if the internal slide isThe McDonnell & Miller RS 1 BR 1 179524 is a professional grade single level remote sensor probe holder engineered for high pressure hydronic systems and steam boiler applications. Designed for seamless integration, this 1" NPT tank connection holder features a robust NEMA 4X enclosure, providing superior protection against harsh mechanical room environments. As a veteran preferred liquid level control component, it is compatible with the 750 Series,