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Always verify the temperature rating on your existing part before installation
always verify the refrigerant code on the valve body to match your system's R-number and temperature range
aim the sensor toward the north sky for the most stable natural light readings
clear viewing window for rapid assessment of refrigerant liquid line status and vapor/liquid transition
OEM Standards: Direct York S1-2985-3181 replacement ensures proper fitment without the need for terminal modifications
McDonnell & Miller RB-122E Control Els PW 17895 Always verify the temperature ratingThe McDonnell & Miller RB 122E (Part Number 144676) is a heavy duty conductance type low water cut off designed specifically for residential and light commercial hot water boilers. As a veteran preferred electronic LWCO, it features a 120VAC power requirement and a 3 4" NPT connection, making it high performance protection against dry firing. This unit includes a patented self cleaning probe that reduces scale build upa common failure point in
