Resideo - Honeywell Home VCZAA3100 2-Way Valve AssemblyThe VCZAA3100 is a 1 2" sweat 2 way valve assembly for hydronic systems, delivering precise control with a 3. 5 Cv rating and a smooth linear flow profile. This compact valve is designed for reliable performance in heating circuits, balancing efficiency with durability. From Resideo Honeywell Home, it combines sturdy construction with easy installation, supporting both new installations and retrofit projects in residential and light commercial

designed for Modine 5H74976-3 units

improve pressure integrity

Temperature rating 212°F

This universal retrofit

Responsive airflow detection supports furnace protection

Direct acting pneumatic mechanism for fast

Ambient temp up to 125°F

delivering fast flame sensing and prompt re-ignition when needed

Optimized for industrial/commercial heating and space heating with mixing tubes

Purge Time options: 7/30/60/90 seconds

with a nominal 30–60 second travel time

Whether upgrading existing equipment or building a new automated line