It matches the 48 frame specs and 208-230V requirements of the previous model

maintaining the integrity of the original furnace control board and gas valve operation

Proper integration into the control circuit prevents ignition if venting is obstructed or the inducer fails

This proportional direct acting controller utilizes an 18-inch rigid stem element to sense rapid temperature shifts

while the 20-second maximum spring return ensures a reliable fail-safe position during power loss

Belimo ZONE315S-35 Valve 321894-709 It matches the 48 frameThe Belimo ZONE315S 35 is a high performance 3 way zone valve designed for precise flow control in hydronic systems. Featuring a 1 2 inch sweat connection and a 3. 5 Cv rating, this valve is engineered for efficiency in chilled or hot water applications. The forged brass body ensures long term durability, while the EPDM O rings and stainless steel stem provide reliable sealing and smooth operation under varying pressure differentials. This compact