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← TechnologyWhich consequence results when a chiller's refrigerant loses non-condensable gas purge?
A)Decreased superheat at evaporator outlet
B)Increased back pressure at compressor✓
C)Elevated subcooling at condenser exit
D)Lowered oil viscosity in the crankcase
💡 Explanation
Increased back pressure at compressor arises because non-condensables like air raise total presssure. This requires higher compressor effort, therefore leading to increased back pressure, rather than reduced evaporator superheat that might be caused by overcharging.
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