Aprilaire 4977 Relay 320734-701 This assembly is built with

This assembly is built with a lead-free copper silicon alloy body to meet strict potable water standards while providing superior corrosion resistance

the HCAE-3-VX100H utilizes an external equalizer to accurately sense pressure at the evaporator outlet

Where is the Carrier HH79NZ101 typically located

and general ventilation dampers requiring a 3-inch stroke

This relay is widely used across Johnson Controls manufactured platforms

Aprilaire 4977 Relay 320734-701 This assembly is built withThe Aprilaire 4977 Relay is a high performance 24v Coil DPDT Relay designed for seamless integration within advanced HVACR systems. This versatile double pole double throw relay serves as a critical HVAC control component, allowing for the simultaneous management of two independent circuits. Engineered for Aprilaire humidifiers and air cleaners, this 24 volt switching relay ensures precise electrical isolation and reliable secondary hardware