Three Function Trinary Pressure Switch
The Trinary Switch protects the system from excessive high or low system pressures, in addition to automatically operating electric radiator or condenser fans as needed for maximum system performance.
Trinary Safety Switch Pressures:
Low is off @ 28psig - and on @ 29psig
High is off @ 454psig - and on @ 369psig
Fan is on @ 227psig - and off @ 185psig
Made in the USA!