Mitsubishi Electric City Multi CMB-P1016NU-G, Service Handbook

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[
II
Restrictions ]
2. PQRY
(1) Line branching
System that requires 16 BC controller ports or fewer
<System with only the main BC controller or standard BC controller>
* 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.
Unit: m [ft]
Operation Pipe sections Allowable length of pipes
Length Total pipe length A+B+a+b+c+d+e 300 [984] or less
*1
*1. When the aggregate length of all pipes exceeds 300m [984ft], observe the restrictions in the figure titled "Restrictions
on pipe length" below.
Total pipe length from the heat source unit to the
farthest indoor unit A+e 150 [492] or less
(Equivalent length 175 [574] or less)
Between heat source unit and BC controller A 110 [360] or less
Between BC controller and indoor unit e 40 [131] or less
*2
*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)
Height
difference Between indoor and
heat source units Heat source unit above
indoor unit H 50 [164] or less
Heat source unit below
indoor unit H' 40 [131] or less
Between indoor unit and BC controller h1 15 [49] or less (10 [32] or less)
*3
*3. 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] or less (10 [32] or less)
*3
Heat source unit
B
A
a
b
c d
e
H=50 m [164ft] or less (Heat source unit below indoor unit) H'=40 m [131ft] or less (Heat source unit below indoor unit)
h1=15 m [49ft] or less
h2=15 m [49ft] or less
(P161-P280 models:
2 ports merged with
a junction pipe)
Branch joint
(For use with the Y series)
CMY-Y102S-G
Junction pipe
(Optional accessory)
110 m [360ft] or less
40 m [131ft] or less
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)
BC controller
Indoor unit
Indoor unit Indoor unit
Indoor unit
Indoor unit
Restrictions on pipe length The height difference and the pipe length between BC controller and indoor units (A)
Height difference between main BC controller and farthest indoor unit (m[ft])
Aggregate length of all pipes (m[ft])
Pipe length between main BC
controller and farthest indoor unit (m[ft])
400[1312]
350[1148]
300[984]
250[820]
200[656]
30
[98]
40
[131]
50
[164]
60
[196]
70
[229]
80
[262]
90
[295]
100
[328]
110
[360]
Pipe length between heat source unit and BC controller (m[ft])
70[229]
60[196]
40[131]
30[98]
50[164]
10[32]
20[65]
0 0
5
[16]
10
[32]
15
[49]