Design and Technical Manual

6. SYSTEM DESIGN
PIPING LIMITATION2-2.
LIMITATION

a b
d
H2
H3
H4
H1
f
g
h
i j
k
l
m
e
c
Limitation
ft (m)
Diagram
Allowable pipe length (actual pipe length)
Total pipe length 377 (115) or less Total
Between outdoor unit and the farthest indoor unit 230 (70) or less a + b + c + m
Between outdoor unit and branch boxes 180 (55) or less a + b + c + d + e
Between branch box and indoor unit
Total 197 (60) or less f + g + h + i + j + k + l + m
Each unit
Between 10 to 49
(3 to 15)
f, g, h, i, j, k, l, m
Between outdoor unit and the rst separation tube
16 (5) or more
a
Between outdoor unit and branch box
(When there is no separation tube)
a + d
Allowable height difference
Between outdoor unit and indoor unit 98 (30) or less H1
Between outdoor unit and branch box 98 (30) or less H2
Between branch box and branch box 49 (15) or less H3
Between indoor unit and indoor unit 49 (15) or less H4
- (06 - 12) -
SYSTEM DESIGN SYSTEM DESIGN