Mitsubishi Electric PQHY-P120THMU-A, Service Handbook

Page: 76 / 414

[
II
Restrictions ]
- 67 - HWE09080 GB
1) A system that requires more than 16 BC controller ports requires two or three BC controllers (main and sub), and three pipes
will be used between the main and the sub BC controllers.
2) When connecting two sub BC controllers, observe the maximum allowable length in the table above.
3) When connecting two sub BC controllers, install them in parallel.
4) To connect the P72 or P96 model of indoor units, use an optional junction pipe kit (Model: CMY-R160-J) and merge the two
ports before connecting them.
5) Do not connect the P72 or P96 model of indoor units and other models of indoor units at the same port.
6) All the units that are connected to the same ports can only be operated in the same operation mode (cooling/heating).
7) The maximum capacity of the indoor units that is connectable to the CMB-P-NU-GB types of sub BC controllers is P126 or
below (when two GB type controllers are connected, P126 or below for both combined).
The maximum total capacity of indoor units that is connectable to the sub BC controller CMB-P1016NU-HB is P126 or below.
If at least one CMB-P1016NU-HB unit is connected, the maximum total capacity of connectable indoor units to a system with
two sub controllers is P168 or below.
0
10
20
30
40
50
60
70
0 5 10 15
[PQRY-P144, P168, P192, P216, P240THMU-A/YHMU-A]
The height difference and the pipe length between
BC controller and indoor units Restrictions on pipe length
Aggregate length of all pipes(m[ft])
Pipe length between main BC
controller and farthest indoor unit (m[ft])
Height difference between main BC controller and farthest indoor unit (m[ft])
[32]
[16] [32] [49]
[64]
[98]
[131]
[164]
[196]
[229]
110
1000
900
800
700
600
500
400
300
200
10 20 30 40 50 60 70 80 90 100
Pipe length between heat source unit and BC controller (m[ft])
[32] [64] [98] [131] [164] [196] [229] [262] [295] [328] [360]
[3280]
[2952]
[2624]
[2296]
[1968]
[1640]
[1312]
[984]
[656]