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[ II Restrictions ]
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HWE09080 GB
[8] Restrictions on Pipe Length
(1) End branching <PQHY>
P72 - P120 models
Unit: m [ft]
Operation Pipe sections
Allowable length of
pipes
Length Total pipe length A+B+C+D
+a+b+c+d+e+f
300 [984] or less
Total pipe length (L) from the heat source unit to
the farthest indoor unit
A+B+C+c or
A+D+f
165 [541] or less
(Equivalent length 190
[623] or less)
Total pipe length from the first branch to the far-
thest indoor unit ( )
B+C+c or
D+f
40 [131] or less
Height
difference
Between indoor and
heat source units
Heat source unit above
indoor unit
H 50 [164] or less
Heat source unit below
indoor unit
H' 40 [131] or less
Between indoor units h 15 [49] or less
L
B
e
h
f
6
1
a
c
b
3
2
5
A
D
C
d
4
H
H
'
Branch joint
Indoor Indoor Indoor
Indoor Indoor Indoor
cap
Branch header
(Heat source unit above indoor unit)
(Heat source unit below indoor unit)
Heat source unit
First branch
(Branch joint)