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The evaporator approach temperature is the difference between the

  • A.leaving chilled water and the refrigerant temperature
  • B.entering and leaving chilled water
  • C.leaving chilled water and the room temperature
  • D.condenser and evaporator refrigerant temperatures

Answer: A

A rising approach at constant duty says the tubes are fouled or the charge is low, and the compressor must then work against a lower evaporating temperature for the same chilled water. Trending it is the standard chiller health check.

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