specifically the W351 humidity control series

this thermal expansion valve is engineered to maintain optimal superheat at the evaporator coil

Industrial-Grade Build: Engineered to withstand the thermal stresses of flue gas ventilation in high-efficiency heating systems

This specific model features a 1/4" barbed connection for standard vacuum tubing and is the primary 632252 replacement switch for Nordyne

A common symptom is the boiler failing to ignite or going into lockout mode

McDonnell & Miller WFE-120V Water Feeder 30067439-890 specifically the W351 humidity controlThe McDonnell & Miller WFE 120V Water Feeder (Part Number 169560) is a heavy duty 120Vac electronic water feeder designed for professional grade steam boiler and hot water boiler management. Engineered as a universal Uni Match feeder, this unit integrates seamlessly with both probe type and float type low water cut offs (LWCO). It is a critical component for maintaining a safe water level, effectively preventing dry fire conditions by monitoring the