It typically functions as a fan relay or high-power interface

This specific part number (903038P) is the "Less Strainer" (LS) configuration

providing ample reach for remote mounting

Specifically engineered for 501 through 1300/1302 models

Schneider Electric (Erie) VT2213G13A02A Valve Assembly 321894-709 It typically functions as aThe Schneider Electric Erie VT2213G13A02A is a robust two way normally closed zone valve engineered for precision control in hydronic heating and cooling systems. Built for professional contractors, this 1 2 inch sweat valve assembly features a 3. 5 Cv flow coefficient, ensuring efficient fluid regulation across terminal units. Operating on a 24Vac power supply, the motorized spring return actuator provides reliable fail safe positioning, while the