Engine : Refrigeration AC - 881/610 |
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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) open the system vent to the atmosphere and allow the pressure to equalize |
B) heat the refrigerant |
C) pressurize the system with nitrogen |
D) charge the system until it is completely filled with liquid refrigerant |
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