5
Refrigerant Piping
Lc
Lb
La
LA
L3
L4
L5
L6
f
g
h
i
j
a
b
c
d
e
(j)
L7
Height
difference
between
outdoor
units
H3
≤
5 m
Outdoor unit
A
Header
unit
B
Follower
unit
C
Follower unit
O
ut
do
or
u
ni
t c
on
ne
ct
in
g
pi
pe
s
Outdoor unit connection piping kit
(For linking of outdoor units)
The longest piping between outdoor units:
LO
≤
25 m
M
ai
n
pi
pi
ng
L
1
Height
difference
between
outdoor
and indoor
units:
H1
≤
70 m
First branching
section
Branching header
Y-shaped branching
joint
Indoor unit connecting
pipe
Indoor unit
The longest piping length: L
≤
235 m
The longest piping length from the first branch: Li
≤
90 m
Y-shaped
branching joint
Indoor unit
Height
difference
between
indoor
units:
H2
≤
40 m
s
ti
n
u
3
o
t
p
U
n
o
it
a
n
i
b
m
o
c
t
i
n
u
r
o
o
d
t
u
O
Note
(*1):(D) is outdoor unit furthest from the 1st branch and (j) is the indoor unit furthest from the 1st branch.
(*2) :If the height difference (H1) between indoor and outdoor unit exceeds 3 m, set 65 m or less.
(*3) :If the max. combined outdoor unit capacity is 54HP or more, then max. equivalent length is 70 m or less (real length is 50 m or less).
(*4) :If the height difference (H2) between indoor units exceeds 3 m, set 50 m or less.
P
H
0
6
o
t
p
U
s
ti
n
u
r
o
o
d
t
u
o
f
o
y
ti
c
a
p
a
c
l
a
t
o
T
s
ti
n
u
4
6
o
t
p
U
n
o
it
c
e
n
n
o
c
t
i
n
u
r
o
o
d
n
I
Total capacity of indoor units
(varies depending on the height difference between
indoor units.)
H2
≤
15m
135% of outdoor units’ capacity
15m < H2
105% of outdoor units’ capacity
<Cooling,Heat pump type>
For T8P - E
Allowable length of refrigerant pipes and allowable height difference between units
System restriction
Summary of Contents for SMMS-e
Page 96: ...Quick Reference ...
