Mitsubishi Electric PURY-P200 Service Handbook page 42

[Systems that requires more than 16 pipe-end connections or with multiple BC controllers
(with a use of both main and sub controllers)]
Outdoor unit
Item
Total piping length
Farthest piping length
Between outdoor unit - BC controller
Between BC controller and indoor unit
Between indoor unit
and outdoor unit
Between indoor unit and BC controller
Between indoor units
Between main BC controller and sub BC controller
Between indoor (main BC controller) and
indoor (sub BC controller) units
Note: A system with more than 16 branching requires 2 to 3 BC controllers (main/sub) and 3 pipes between BC controllers.
Note 1: Refer to the graph below for restrictions on refrigerant piping when the total piping length exceeds 300 m.
Note 2: 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 3: Use the figures in the parentheses if the capacity of the connected indoor units is P200 type or above.
Note 4: When indoor units of type P200 or above are connected, neither branch joints nor branch headers can be used.
Note 5: When 2 sub BC controllers are connected, include them in the figures in the table above.
Note 6: When 2 sub BC controllers are connected, connect them in parallel.
• Restrictions on piping length
400
350
300
250
200
30 40 50
Distance between outdoor unit and
BC controller (m)
110 m or less
A
BC controller (main)
a
Junction
Indoor unit
pipe
(option)
Indoor unit
(P141~P250 types: 2-line merge)
Outdoor unit above
Outdoor unit below
60 70 80 90 100 110
- 39 -
<With more than 16 branching>
Indoor unit
C
40 m or less
Branch pipe (for Y-series)
CMY-Y102S-G
b
B
c
Indoor unit Indoor unit
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.)
Piping sections
A + B + C + a + b + c + d + e + f + g
A + C + g or A + e
(175 m equivalent length or less)
A
e or C + g
H
H'
h1 15 m or less (10 m or less) (Note 3)
h2 15 m or less (10 m or less) (Note 3)
h3
h4
• Height difference and branch piping length between
BC controller and indoor unit. (A)
70
60
50
40
30
20
10
0
0 5
Height difference between main BC controller and
farthest indoor unit (m)
Indoor unit
g
f
BC controller
(sub)
h3
Note 6
e
d
Indoor unit
Allowable value
300 m less
150 m or less
110 m or less
40 m or less (Note 2)
50 m or less
40 m or less
15 m or less
15 m or less (10 m or less)
(Notes 3 and 5)
10 15
h4