Reliable Safety: The automatic reset residential logic eliminates manual intervention after temporary power loss

This is a standard 24 VAC control valve

whereas they can serve as either primary or secondary on hot water boilers

Can I use this blower wheel for other Aaon models

McDonnell & Miller 157S Controller R-410A Reliable Safety: The automatic resetThe McDonnell & Miller 157S is a heavy duty combination low water cut off and pump controller engineered for commercial and industrial steam and hot water boilers. This specific OEM part #173502 features the 157S series head mechanism (part #173003) equipped with a snap acting SPDT switch. Designed for high pressure applications up to 150 psi (10. 5 kg cm), this controller ensures precise liquid level management, acting as a critical failsafe by