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To pump down a VRV (Variable Refrigerant Volume) unit, first, ensure that the system is properly shut down and isolate the unit from the refrigerant circuit. Next, connect a recovery machine to the service ports of the outdoor unit, and run the machine to remove the refrigerant from the system, monitoring the pressure to ensure it reaches a vacuum state. Once the refrigerant is fully recovered, close the service valves and disconnect the equipment. Finally, ensure that all lines are properly sealed to prevent any refrigerant leaks.

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1w ago

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