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[2-10 Restrictions on Refrigerant Pipes ]
2-10 Restrictions on Refrigerant Pipes
2-10-1
Restrictions on Refrigerant Pipe Length
(1) System that requires 16 BC controller ports or fewer <System with only the main BC controller or standard BC con-
troller>
Outdoor unit
H
H'
Reducer (P06 - P18 models)
(Supplied with the BC Controller)
h1
Operation
Length
Total pipe length
Total pipe length from the outdoor unit
to the farthest indoor unit
Between outdoor unit and BC control-
ler
Between BC controller and indoor unit
Height
difference Between indoor
and outdoor units
Between indoor unit and BC controller
Between indoor 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.
1) To connect the P72 through P96 models of indoor units, use an optional twinning pipe kit (Model: CMY-R160-J) and merge
the two ports before connecting them.
2) Do not connect the P72 or P96 models of indoor units and other models of indoor units at the same port.
3) Note the following when connecting multiple indoor units to a single port.
Those indoor units connected to the same port must be installed in the same room.
Set the indoor temperature via the connected remote controller, and when connecting multiple remote controllers, configure
these controllers as a group by making appropriate settings. These indoor units can only be operated in the same mode.
HWE13080
*Use a main BC controller when connecting the outdoor units of
A
P144 model or above.
BC controller
a
Junction pipe
b
(CMY-R160-J)
Indoor
Indoor
(P06 - P54 models)
(P72 - P96 models)
Pipe sections
A+B+a+b+c+d
A+B+d
B+d
Outdoor unit
above indoor unit
Outdoor unit be-
low indoor unit
- 51 -
Indoor
Branch joint
(CMY-Y102S-G2)
d
B
c
Indoor
Maximum of 3 units per port
Total capacity of P54 or below
Allowable length of pipes
Refer to the restrictions on the total piping
length in the graph on the next page.
165 [541] or less
(Equivalent length 190 [623] or less)
A
110 [360] or less
40 [131] or less
H
50 [164] or less
H'
40 [131] or less
h1
15[49](10[32]) or less
h2
15[49](10[32]) or less
h2
Unit: m [ft]
*1
*2
*2
GB
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