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you can wire it to break on temperature rise (cooling) or make on temperature rise (heating)
Built to withstand the corrosive environment of condensing heat exchangers
What causes this switch to fail most often
but the primary power requirement is a standard 24V AC/DC source
Armstrong Fluid Technology 182212-669 Pump 320720-756 you can wire it toUpgrade your hydronic system with the Armstrong Fluid Technology 182212 669 Pump, a premier E33. 2 high efficiency circulator designed for superior performance in commercial and large residential applications. This 2 5 HP cast iron pump operates at 3300 RPM on a 120V single phase motor, providing a robust maximum flow rate of 143 GPM and up to 26 feet of head. As a direct replacement for 180210 669, it features an advanced maintenance free "dry motor"
