SC Refrigeration Practice Questions - South Carolina Refrigeration Contractor Examination Exam

An evaporator pressure regulator (EPR or EPR valve) is used to:

Keep evaporator pressure from falling below a set point so the coil (or product) does not go too cold Limit compressor crankcase pressure during pull-down Raise condenser pressure in cold weather Equalize the TXV externally

Correct Answer:

Keep evaporator pressure from falling below a set point so the coil (or product) does not go too cold

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