The 664063R is the updated manufacturing standard and is functionally identical to the 664063

A: This unit

the Danfoss 060-5241 delivers the industrial-grade performance required for commercial service work

a blocked secondary heat exchanger

Johnson Controls VG7241LT+423BGA Valve Assembly THPU32HP7Y The 664063R is the updatedThe Johnson Controls VG7241LT+423BGA is a heavy duty 2 way normally open globe valve assembly designed for precise flow control in demanding HVACR applications. Built with a 3 4 inch NPT female threaded connection, this unit features a cast bronze body with brass trim, ensuring high pressure integrity for hot water, chilled water, and 50 50 glycol solutions. The assembly is powered by a high torque VA 4233 spring return electric actuator, providing