ASHRAE Standards 15 and 34 for VRV/VRF Systems

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refrigerant charge, the output from VRV Xpress also automatically generates piping and wiring diagrams. If piping or indoor unit fan coil locations need to be revised, the VRV Xpress will recalculate pipe sizes and refrigerant charge automatically. If a room has more than one VRV system serving it thus more than one refrigerant circuit

  Refrigerant, Piping