1. Use the main pipe to gain any rise or fall / required for the pipes.
2. The number of bends should be 8 or less in a single system (L +
la, L + Ib, L + Ic), and 15 or less overall.
3. Branch pipes should be positioned horizontally.
- The branch pipe should be horizontal to or perpendicular to the /
indoor unit.
Installing branch pipes
19.3. Refrigerant charging
- For twin- and triple-type 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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