SiUS39-506 Appendix
General Information 111
Between outdoor branch and outdoor unit (Only for multiple outdoor units)
• Actual pipe length
Piping length from outdoor branch to outdoor unit ≤ 33ft. Equivalent length: max 43ft.
r ≤ 33ft. (Equivalent length: max 43ft.)
t ≤ 33ft. (Equivalent length: max 43ft.)
Allowable
height
length
Between outdoor and indoor units
• Difference in height
Difference in height between outdoor and indoor units (H1) ≤ 164ft.
(Max 130ft. if the outdoor unit is below)
Between indoor and indoor units
• Difference in height
Difference in height between adjacent indoor units (H2) ≤ 49ft.
Between outdoor and outdoor units
• Difference in height
Difference in height between outdoor unit (main) and outdoor unit (sub) (H3) ≤ 16ft.
Allowable
length after
the branch
• Actual pipe length
Pipe length from first refrigerant branch kit (either refnet joint or refnet header) to indoor unit ≤ 130ft.
Example unit 8: o ≤ 130ft.
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