This 2-wire hard start is compatible with 120V to 288V systems

Multi-Refrigerant Compatibility: Optimized for R22

and OE/OEA burners

The integrated spring return actuator provides a critical fail-safe position

Lochinvar & A.O. Smith 100111100 Kit 320720-756 This 2-wire hard start isThe Lochinvar & A. O. Smith 100111100 Kit is a critical 3" Concentric Vent Kit engineered for high efficiency appliance installations. Designed for use with Lochinvar Knight boilers and A. O. Smith Vertex water heaters, this direct vent termination simplifies the management of intake and exhaust through a single sidewall penetration. Utilizing ULC S636 compliant materials, this kit ensures professional grade durability in demanding HVACR environments.