Mitsubishi Electric PQHY-P120THMU-A, Service Handbook

Page: 68 / 414

[
II
Restrictions ]
- 59 - HWE09080 GB
P144 - P360 models
Unit: m [ft]
Operation Pipe sections
Allowable length of
pipes
Length Between heat source units A+B+C+D 10 [32] or less
Total pipe length A+B+C+D+E+F+G+I+J
+K+M+a+b+c+d+e+f+g
+i
300 [984] or less
Total pipe length (L) from the heat source unit to
the farthest indoor unit A(B)+C+E+J+K+M+i 165 [541] or less
(Equivalent length 190
[623] or less)
Total pipe length from the first branch to the far-
thest indoor unit (
)
G+I+J+i 40 [131] or less
Height
difference Between indoor and heat source units H 50 [164] or less
(40 [131] or below if
heat source unit is be-
low indoor unit)
Between indoor units h1 15 [49] or less
Between heat source units h2 0.1[0.3] or less
Indoor Indoor Indoor Indoor
Indoor Indoor Indoor Indoor
E
L
H
a
h1
h2
b
2
1
c
3
d
4
e
5
f
6
g
7
i
8
C
E F G I
J K M
B D A
First branch
(Note)
To downstream units
Note : "Total sum of downstream unit model numbers"
in the table is the sum of the model numbers
of the units after point E in the figure.
Note1 Install the pipe that connects the branch pipe and the heat source units
in the way that it has a downward inclination toward the branch pipe.
Provide a trap on the pipe (gas pipe only) within 2 m from the
joint pipe if the total length of the pipe that connects the joint
pipe and the heat source unit exceeds 2 m.
Downward inclination
To indoor unit
To indoor unit
To indoor unit
Joint pipe
Joint pipe
Trap
(gas pipe
only)
To indoor unit
Upward inclination
First liquid refrigerant distributor
First gas refrigerant distributor
Second gas refrigerant distributor
Second liquid refrigerant distributor
2m [6ft]
2m [6ft] Max.