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Mitsubishi Electric PURY-HP72 Service Handbook page 66

R410a
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[2-10 Restrictions on Refrigerant Pipes ]
(3) System that requires more than 16 BC controller ports or with multiple BC controllers <Two-outdoor-unit system>
1
Outdoor unit
Outdoor unit
h4
F
H
H'
Reducer (P06 - P18 models)
(Supplied with the BC Controller)
h1
Operation
Length
Total pipe length
Total pipe length from the out-
door unit to the farthest indoor
unit
Between outdoor unit and BC
controller
Between BC controller and in-
door unit
Between indoor units
Height
differ-
Between indoor
ence
and outdoor
units
Between indoor unit and BC
controller
Between indoor units
Between the BC controller
(main or sub) and the sub BC
controller
Between outdoor units
*1. When the overall pipe length between the BC controller and the farthest indoor unit exceeds 40m [131ft], observe
the restrictions in the figure titled "Restrictions on pipe length" below. (Except the P96 models)
*2. When the capacity of the connected indoor units is P72 or above, use the figures in the parentheses as a reference.
HWE13080
Branch joint (CMY-R100CBK2)
The distributor on the low-pressure side must be placed in the outdoor unit that has a larger capacity
2
index of the two, regardless of the relative positions of the outdoor units or their addresses.
If the distributor is placed in the outdoor unit that has a smaller capacity, refrigerant will not be properly
distributed and compressor failure may result.
(If outdoor units that have the same capacity are used in combination, the distributor can be placed in
either outdoor unit.)
G
A
BC controller (main)
a
Junction pipe
b
(CMY-R160-J)
Indoor
Indoor
(P06 - P54 models)
(P72 - P96 models)
F+G+A+B+C+D+E+a+b+c+d+e
F(G)+A+C+E+f
Outdoor unit
above in-
door unit
Outdoor unit
below in-
door unit
Branch joint
(CMY-Y202-G2)
(CMY-Y102L-G2)
(CMY-Y102S-G2)
D
C
Branch joint
(CMY-Y102S-G2)
E
B
c
d
Indoor
Indoor
Maximum of 3 units per port
Total capacity of P54 or below
Pipe sections
Refer to the restrictions on the total pip-
+f
ing length in the graph on the next page.
(Equivalent length 190 [623] or less)
F(G)+A
B+d or C+D+e
or C+E+f
F+G
H
H'
h1
h2
h3
h4
- 55 -
Indoor
e
h1
BC controller (sub)
h3
BC controller (sub)
h2
f
h1
Indoor
Unit: m [ft]
Allowable length of pipes
165 [541] or less
110 [360] or less
*1
40 [131] or less
5 [16] or less
50 [164] or less
40 [131] or less
*2
15 [49](10[32]) or less
*2
15 [49](10[32]) or less
15 [49] or less
0.1 [0.3] or less
GB

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