– 10 –
EN
Allowable length / height difference of refrigerant piping
*1: Furthest indoor unit from 1st branch to be named “A”.
Allowable value
Pipes
Piping
Length
Total extension of pipe (Liquid pipe, real length)
180 m
L1 + L2 + L3 + L4 + a + b + c + d + e + f + g
Furthest piping length
L (*1)
Real length
100 m
L1 + L3 + L4 + g
Equivalent length
125 m
Max. equivalent length of main pipe
65 m
L1
Equivalent length of furthest piping from 1
st
branching Li (*1)
35 m
L3 + L4 + g
Max. real length of indoor unit connecting pipe
15 m
a, b, c, d, e, f. g
Height
Difference
Height between indoor
and outdoor units H1
Upper outdoor unit
30 m
–
Lower outdoor unit
20 m
–
Height between indoor units H2
15 m
–
L4
e
f
g
a
b
c
d
A
∗
1
Outdoor unit
Main
pipe L1
Intdoor unit
1st branching
section
Branching pipe L2
Branch header
Equivalent length corresponded to farthest piping L
Equivalent length corresponded to farthest piping after 1st branching Li
Y-shape
branch joint
Branching pipe
L3
Height difference
between indoor and
outdoor units H1
Height difference
between indoor
units H2
Allowable length / height difference of refrigerant piping for quiet
places (with PMV Kit)
*1: Furthest indoor unit from 1st branch to be named “A”.
NOTE
Do not connect two or more indoor units to one PMV Kit. Arrange one indoor unit and one PMV Kit set to 1 by 1.
Allowable value
Pipes
Piping
Length
Total extension of pipe (Liquid pipe, real length)
150 m
L1 + L2 + L3 + L4
+ a + b + c + d + e + f + g + h + I + j + k+ l + m + n
Furthest piping length
L (*1)
Real length
65 m
L1 + L3 + L4 + g + n
Equivalent length
80 m
Max. equivalent length of main pipe
50 m
L1
Equivalent length of furthest piping from 1
st
branching Li (*1)
15 m
L3 + L4 + g + n
Max. real length of indoor unit connecting pipe
15 m
a + h, b + i, c + j, d + k, e + l, f + m. g + n
Real length between PMV KIT and indoor unit
2 m or more
Below 10 m
h, i, j, k, l, m, n
Height
Difference
Height between indoor
and outdoor units H1
Upper outdoor unit
30 m
–
Lower outdoor unit
20 m
–
Height between indoor unit and PMV kit H2
15 m
–
L4
e
f
l
m
n
g
a
b
h
i
j
k
c
d
H2
H2
H2
A
∗
1
Outdoor unit
Main
pipe L1
Intdoor unit
1st branching
section
Branching pipe L2
Branch header
Equivalent length corresponded to farthest piping L
Equivalent length corresponded to farthest piping after 1st branching Li
Y-shape
branch joint
Branching pipe
L3
Height difference
between indoor
and outdoor
units H1
Height difference
between indoor unit
and PMV Kit
H2
*
Example)
* Between highest
unit and lower units.
Intdoor unit
PMV Kit
Indoor unit
Indoor unit
PMV Kit
PMV Kit
NO GOOD
OK
19-EN
20-EN