this 1/6 HP motor delivers consistent refrigerant circulation and pressure regulation

The 21887U is the timed version of the 21807U

and 37 tons for R404A

the inducer fan running without ignition

maintaining the blower assembly's factory-rated CFM

Resideo FV180 Air Vent 322057-301 this 1/6 HP motor deliversThe Resideo FV180 is a high performance, spring loaded float type air vent engineered for efficient air removal in closed hydronic heating and cooling systems. Built with a durable brass body, this 1 8" NPT automatic air vent features a patented fulcrum design that delivers a venting rate 3 to 4 times higher than standard competitive models. Specifically designed to handle the accumulation of air released during the heating of cold water, the Resideo