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[ II Restrictions ]
- 47 -
HWE0803A GB
(3) System that requires more than 16 BC controller ports or with multiple BC controllers <Outdoor unit P144 model or
above.>
Unit: m [ft]
Operation Pipe sections Allowable length of pipes
Length Total pipe length F+G+A+B+C+D+E+a+b+c+d+e
+f
Refer to the restrictions on the total pip-
ing length in the graph on the next page.
Total pipe length from the out-
door unit to the farthest indoor
unit
F(G)+A+C+E+f 165 [541] or less
(Equivalent length 190 [623] or less)
Between outdoor unit and BC
controller
F(G)+A 110 [360] or less
Between BC controller and in-
door unit
B+d or C+D+e
or C+E+f
40 [131] or less
*1
*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)
Between indoor units F+G 5 [16] or less
Height
differ-
ence
Between indoor
and outdoor
units
Outdoor unit
above in-
door unit
H 50 [164] or less
Outdoor unit
below in-
door unit
H' 40 [131] or less
Between indoor unit and BC
controller
h1 15 [49](10[32]) or less
*2
*2. When the capacity of the connected indoor units is P72 or above, use the figures in the parentheses as a reference.
Between indoor units h2 15 [49](10[32]) or less
*2
Between the BC controller
(main or sub) and the sub BC
controller
h3 15 [49] or less
Between outdoor units h4 0.1 [0.3] or less
h1
h3
h1
h2
f
D
E
e
Branch joint (CMY-R100VBK)
The distributor on the low-pressure side must be placed in the outdoor unit that has a larger capacity
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.)
a
C
b
B
cd
A
G
F
h4
Outdoor unit
1
Outdoor unit
2
HH'
h1
BC controller (main)
Indoor Indoor Indoor Indoor
Indoor
Indoor
BC controller (sub)
BC controller (sub)
Branch joint
(CMY-Y202-G2)
(CMY-Y102L-G2)
(CMY-Y102S-G2)
Branch joint
(
CMY-Y102S-G2)
(P06 - P54 models) (P72 - P96 models)
Maximum of 3 units per port
Total capacity of P54 or below
Reducer (P06 - P18 models)
(Supplied with the BC Controller)
Junction pipe
(CMY-R160-J)