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Engine : Refrigeration AC - 899/610
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Minor repairs may be performed on low-pressure refrigerant systems without recovering the refrigerant charge if the pressure in the system is raised to atmospheric. How may this be accomplished?
A) pressurize the system with nitrogen
B) heat the refrigerant
C) open the system vent to the atmosphere and allow the pressure to equalize
D) charge the system until it is completely filled with liquid refrigerant
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