- 38 -
B
A
a
b
c
d
e
400
350
300
250
200
30
40
50
60
70
80
90
100 110
70
60
40
30
50
10
20
0
0
5
10
15
Note 1: Use the figures in the parentheses if the capacity of the connected indoor units is P200 type or above.
Note 2: Refer to the graph below for restrictions on refrigerant piping length when the total piping length exceeds 300 m.
Note 3: Refer to the graph below for restrictions on refrigerant piping length when the piping length between the BC
controller and the farthest indoor unit exceeds 40 m. (except P250-type indoor units)
Note 4: When indoor units of P200 type or above are connected, neither branch joints nor branch headers can be used.
Note 5: Do not connect P200- or P250-type indoor units and other types of indoor units at the same pipe end connection.
[16 branches or less (the use of only the main BC controller or standard BC controller)]
Outdoor unit
BC controller
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Indoor unit
110 m or less
40 m or less
(P141~P250 types: 2-line merge)
• Restrictions on piping length
Total piping length (m)
Piping length between main BC controller
and farthest indoor unit (m)
• Height difference and branch piping length between
BC controller and indoor unit. (A)
Distance between outdoor unit and
BC controller (m)
Height difference between main BC controller and
farthest indoor unit (m)
Maximum of 3 units per branch joint
Total capacity of P140 or less
(All units connected to the same
branch joint must be in the same mode.)
Junction
pipe
(option)
Branch pipe (for Y-series)
CMY-Y102S-G
H = 50 m or less (outdoor unit above)
H
’ = 40 m or less (outdoor unit below)
h1 = 15 m or less
h2 = 15 m or less
Total piping length
A + B + a + b + c + d + e
Piping length
Farthest piping length
Between outdoor unit - BC controller
Height difference
Between BC controller and indoor unit
Between indoor unit and BC controller
Between indoor units
Between indoor unit
and outdoor unit
Outdoor unit above
Outdoor unit below
300 m less (Note 2)
A + e
150 m or less
(175 m equivalent length or less)
A
110 m or less
e
40 m or less (Note 3)
H
50 m or less
H’
40 m or less
h1
15 m or less (10 m or less) (Note 1)
h2
15 m or less (10 m or less) (Note 1)
Item
Piping sections
Allowable value
1. Line-branch method
