Mitsubishi Electric CITY MULTI PUHY-P108 Service Handbook page 66

2. PURY
(1) Line branching
System that requires 16 BC controller ports or fewer
<System with only the main BC controller or standard BC controller>
Length Total pipe length
Total pipe length from the outdoor unit to the
farthest indoor unit
Between outdoor unit and BC controller
Between BC controller and indoor unit
Height Between indoor and
difference outdoor units
Between indoor unit and BC controller
Between indoor units
*1. When the aggregate length of all pipes exceeds 300m [984ft], observe the restrictions in the figure titled "Restrictions
on pipe length" below.
*2. 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)
*3. When the capacity of the connected indoor units is P72 or above, use the figures in the parentheses as a reference.
* In the system to which indoor units of P72 model or above are connected, neither a branch joint nor a branch header
may be used.
* Do not connect the P72 or P96 models of indoor units with other models of indoor units to the same port.
Restrictions on pipe length
400[1312]
350[1148]
300[984]
250[820]
200[656]
[98]
Pipe length between outdoor unit and BC controller (m[ft])
Outdoor unit
110 m [360ft] or less
A
BC controller
a
Indoor unit
Indoor unit
(P161-P280 models:
2 ports merged with
a junction pipe)
Junction pipe
(Optional accessory)
Operation
Outdoor unit above
indoor unit
Outdoor unit below
indoor unit
30 40 50 60 70 80 90 100 110
[131] [164] [196] [229] [262] [295] [328] [360]
40 m [131ft] or less
Branch joint
(For use with the Y series)
CMY-Y102S-G
b
B
c d
Indoor unit Indoor unit
Maximum of 3 units per port
Total capacity of P160 or below
(All units connected to the same
port must be in the same
operating mode)
Pipe sections
A+B+a+b+c+d+e
A+e
A
e
H
H'
h1
h2
The height difference and the pipe length between BC controller and indoor units (A)
70[229]
60[196]
50[164]
40[131]
30[98]
20[65]
10[32]
0
5
[16]
Height difference between main BC controller and farthest indoor unit (m[ft])
- 57 -
[ II Restrictions ]
e
Indoor unit
Unit: m [ft]
Allowable length of pipes
*1
300 [984] or less
150 [492] or less
(Equivalent length 175 [574] or less)
110 [360] or less
*2
40 [131] or less
50 [164] or less
40 [131] or less
15 [49] or less (10 [32] or less)
15 [49] or less (10 [32] or less)
10 15
[32] [49]
*3
*3