– 12 –
23-EN
24-EN
EN
FR
■
Allowable length of refrigerant pipes and allowable height
difference between units
LA
La
Lb
Lc
a
b
c
k
l
f
g
h
L3
L5
L6
L7
L8
d
e
m
n
o
(o)
i
j
p
q
r
t
u
s
LO
(m)
(n)
L9
L4
(c)
(b)
(a)
Height
difference
between
outdoor units
Outdoor unit
A
Header
unit
B
Follower
unit
C
Follower unit
Outdoor unit connecting
Outdoor unit
connection
Branching pipe
L2
Branching header
Main piping
L1
Height
difference
between
outdoor and
indoor units:
H1
t
n
i
o
j
g
n
i
h
c
n
a
r
b
d
e
p
a
h
s
-
Y
g
n
i
h
c
n
a
r
b
t
s
ri
F
Indoor unit connecting pipe
Indoor unit
The longest piping length:
L
The longest piping length from the first branch:
Li
The longest piping length in Flow selector unit group :
Ln
Flow
Selector
unit
Indoor unit
Indoor unit
Flow Selector unit (Multi port type)
Indoor unit connecting pipe
Y-shaped branching joint
H4
Height dif
ference between indoor units
H2
CAUTION
Please use the appropriate pipe when the pipe size is Ø3/4 or more. (Table 3)
Outer diameter
Minimum
wall thickness
Temper
Soft
Hard, Half hard
Inch
mm
Inch
mm
OK
OK
Ø1/4"
6.35
0.03
0.80
OK
OK
Ø3/8"
9.52
0.03
0.80
OK
OK
Ø1/2"
12.7
0.04
1.00
OK
OK
Ø5/8"
15.88
0.04
1.00
OK
OK
Ø3/4"
19.05
0.04
1.00
NG
OK
Ø7/8"
22.2
0.04
1.00
NG
OK
Ø1-1/8"
28.58
0.04
1.00
NG
OK
Ø1-3/8"
34.92
0.05
1.20
NG
OK
Ø1-5/8"
41.28
0.06
1.40
NG
OK
1122001101_EN FR.indd 12
1122001101_EN FR.indd 12
7/13/16 3:31 PM
7/13/16 3:31 PM
