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• • • • The branch pipe should be horizontal to or perpendicular to the indoor unit.
• • • • Installing branch pipes
18.3. Refrigerant charging
• • • • For twin systems
The pipe length is the total of the branch pipe (L) and the junction pipes (Ia→t Ib→t Ic in order from the thickest diameter). At
the point where the pipe length exceeds 30 m, determine the amount of refrigerant for the remaining liquid-side pipe diameters
and pipe lengths from the following table in order to charge the system.
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