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← TechnologyWhich consequence results when subcooling drops excessively in an HVAC evaporator?
A)Increased thermal efficiency occurs reliably
B)Compressor motor overheating is prevented
C)System superheat reaches excessively low values
D)Refrigerant phase change occurs prematurely✓
💡 Explanation
Premature phase change occurs due to insufficient subcooling, because the refrigerant begins to boil before reaching the evaporator inlet; therefore, cooling capacity reduces rather than improves thermal efficiency, preventing motor overheating, or lowering superheat.
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