12
Installation manual
5.1 Length and drop height permitted of the refrigerant piping
5. REFRIGERANT PIPE
Table.5-1
Permitted value
Piping(
refer to Fig.5-1)
Total pipe length
(total extended length)
Indoor unit to indoor unit drop height
Pipe length
Drop height
Outdoor unit up
Outdoor unit down
Equivalent length
Actual length
Maximum piping (L)
Indoor unit-outdoor unit
drop height
1,000 m
(refer to caution 5 of
conditions 2)
175m
200m
(
refer to caution 1
)
90m
110m
30m
(
Refer to caution 3
)
Pipe(between the farthest indoor
unit and first branch joint) length
(
Refer to caution 4
)
Fig.5-1
Fig.5-2
≥300mm
≥300mm
Outdoor unit
(one or more outdoor units)
First branch joint
Drop height between indoor
unit and outdoor unit H≤90m
Pipe (between the farthest indoor unit
and first branch joint) length L≤40 m
Pipe (between the farthest indoor unit
and outdoor unit) equivalent length L≤200 m
Indoor unit to outdoor unit
drop height h≤30 m
Indoor unit
40/90*m
(
refer to caution 5
)
*1. Level differences cannot be above 90 m unless customization is requested (if the outdoor unit is above the indoor unit).
L1+L7+L8+L9+L10+i
(Pipe diameter requirements.
Refer to table. 5-4 or 5-5)
L7+L8+L9+L10+i
L1+(L2+L3+L4+L5+L6+L7+L8+L9+L10+L11
+L12)x2+a+b+c+d+e+f+g+h+i+j+k+l+m
N1
(140)
N4
(140)
N7
(140)
N8
(140)
N10
(28)
N12
(56)
N11
(140)
N3
(71)
N6
(28)
N13
(56)
A
B
G
H
K
I
L
C
E
L1
L2
L3
L5
L7
L8
L11
L12
L9
a
c
d
f
g h
j
l
m
k
M
L
g1 g2 g3
G1
W3
(12)
W2
(12)
W1
(22)
D
N
2
(140)
b
L4
N5
(140)
F
L6
e
N
9
(71)
i
J
L10
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