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Factory-Calibrated Precision: Fixed 30 PSI Open and 60 PSI Close settings remove the guesswork from field setup and prevent tampering
maintaining the 254nm germicidal output is essential for neutralizing airborne pathogens and preventing biofilm accumulation on the evaporator coil
Mandatory for high-duty valve linkage applications including Q100 and Q601 series installations
Cores should be replaced whenever a pressure drop across the shell exceeds 2 PSI at full load or after any system breach where the internal components were exposed to atmospheric moisture
Ranco A22-391 Control 30067439-890 Factory-Calibrated Precision: Fixed 30 PSIThe Ranco A22 391 Constant Differential Control is a specialized temperature control switch engineered for high demand commercial refrigeration and freezer applications. This SPDT (Single Pole Double Throw) control is designed without an "off" position, ensuring continuous monitoring and regulation for HVACR refrigeration temperature control. With a constant differential of 8. 0F, it maintains tight thermal tolerances across its operating range. The