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EPR valves exam questions & answers 2024/2025
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EPR valves exam questions & answers 2024/2025
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EPR valves exam questions & answers2024/2025
Evaporator pressure regulator - ANSWERS_____________ is an inlet pressure regulating valve that has
the function of maintaining the pressure of the evaporator it controls at a minimum based on its setting
prevent freezing of water chillers due to operating at extremely low suction temperatures
Prevent icing up of air handlers for the same reason
Multiple evaporators services by a common compressor where the evaporators operate at varying
temperatures (rack system) - ANSWERSWhen is an EPR valve used
Crankcase pressure regulator - ANSWERS__________ is an outlet pressure regulating valve that has the
function of keeping the suction pressure at the compressor below a maximum value according to the
valves setting
Where the pull down load at a relatively high suction pressure would tend to overload the compressor
-By limiting suction pressure the compressor motor load is held within safe limits until setting of valve is
reached - ANSWERSWhen is a CPR valve used
Back pressure regulators / upstream regulators
Because the sense and control evaporator pressure - ANSWERSWhat's another name for an EPR and why
Open to a degree - ANSWERSWhen the evaporator pressure is higher than the setting of the valve the
valve will be _________ depending on how close the existing pressure is to the design operating
pressure
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