York R-410A, Technical & Service Manual, Page: 249 / 385

Installation
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28 kW
Permitted length Pipe
Pipe total length (actual length)
≤ 250 m
L1+L2+L3+L4+L5+L6
+L7 + a+b+..i
Actual length ≤ 150 m
Farthest pipe length(m)
Equivalent length ≤ 175 m
L1+L3+L4+L5+L6+i
Pipe
length
Equivalent length L of pipe from the first
branch to the farthest one (m)
≤ 40 m L3+L4+L5+L6+i
Outdoor unit up ≤ 50 m —— Drop height between
indoor unit and outdoor
unit
Outdoor unit down ≤ 30 m —— Drop
height
Drop height between indoor unit and indoor
unit
≤15m ——
Conversion of the equivalent length: Convert into the direct pipe length. According to branch
Junction 0.5m/l and branch header pipe 1.0m/l.