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Allowable length/height difference of refrigerant piping
Allowable value
Piping section
Total extension of pipe (Liquid pipe, real length)
180 m
L1 + L2 + L3 + L4 + a + b + c + d + e + f + g
Real length
100 m
Furthest piping length L (
∗
1)
Equivalent length
125 m
L1 + L3 + L4 + g
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
Piping
Length
Max. real length of indoor unit connecting pipe
15 m
a, b, c, d, e, f. g
Upper outdoor unit
30 m
———
Height between indoor
and outdoor units H1
Lower outdoor unit
20 m
———
Height
Difference
Height between indoor units H2
15 m
———
∗
1 : Furthest indoor unit from 1
st
branch to be named “A”.
Outdoor unit
1st branching
section
Main pipe
L1
Height difference
between indoor and
outdoor units
H1
Height difference
between indoor units
H2
Indoor unit
Equivalent length corresponded to farthest piping L
Equivalent length corresponded to farthest piping after 1st branching Li
L4
e
f
g
Y-shape
branch joint
Branching pipe L2
Branch header
Branching pipe
L3
a
b
c
d
A
∗
1
Содержание MiNi-SMMS
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