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An evaporator pressure regulator performs the following function
1. Monitors evaporator temp
2. Maintains compressor inlet pressure 
3. Keeps pressure up for system needs
4. All of these

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Correct Answer - Option 4 : All of these

Explanation:

Evaporator Pressure Regulating Valve (EPRs)

  • Evaporator pressure regulating valves are designed to provide an economical means of accurately maintaining evaporator pressure and temperature under varying evaporator loads.
  • The primary function of an evaporator pressure regulator is to prevent the evaporator pressure from falling below a predetermined value.
  • A consistent evaporating temperature is maintained at the valve setting as evaporator load decreases.
  • When the evaporator load increases, the valve opens on a rise of inlet pressure above its setting and thus maintaining compressor inlet pressure.

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