System Protection: Acts as a high-limit cutout to protect internal heat exchangers and venting structures

if the pressure difference falls below this value

whereas lockout modules shut down after a set number of failed attempts for safety

Always ensure the flow arrow on the shell points toward the expansion device during installation

Rugged Durability: Rated for over 100

Armstrong Fluid Technology 110223-307 Pump Refrigerant System Protection: Acts as aThe Armstrong Fluid Technology 110223 307 is a high performance Astro 250CI model, serving as the 115Vac direct replacement for 110123 007. Engineered for closed hydronic heating and cooling systems, this three speed circulator pump features a robust cast iron volute with an internal e coating for superior corrosion resistance and long term reliability. Its maintenance free design eliminates the need for mechanical seals or lubrication, utilizing