Hitachi RAS-3-HVNC - Refrigerant Piping Range; Refrigerant Piping Length; Piping System for Header Branch

3. Piping work and refrigerant charge
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SMGB0079 rev.0 - 01/2013
3.3 Refrigerant piping range
3.3.1 Refrigerant piping length
The refrigerant piping between the indoor unit and the outdoor unit should be designed using the following chart.
Keep the design point within the area of the chart, which is showing the applicable height difference according to piping
length.
3.3.2 Piping system for header branch
1 indoor unit system (O.U. from 2 to 10 HP) 2 indoor units system (O.U. from 2 to 12 HP)
3 indoor units system (O.U. from 4 to 12 HP) 4 indoor units system (O.U. from 4 to 12 HP)
(picturesareasexample)