Mitsubishi Electric CITY MULTI Series Installation Manual page 6

Notes:
A system that has more than 16 branching points requires 2 to 3 BC con-
trollers (main and sub) and 3 pipes to connect the main and the sub BC
controllers.
*1 Refer to "Restrictions on piping length" on P. 7.
*2 Please refer to the figure "Distance between main BC controller and
farthest Indoor unit" when the distance between main BC controller
and farthest indoor unit exceeds 40 m [131 ft]. (Not applicable to the
P96 model indoor unit)
*3 The values in the parentheses show the maximum piping length to be
followed when the connection capacity of the indoor unit is 72 or more.
*4 In the system to which indoor units of the P72 model or above are con-
nected, neither a branch joint nor a branch header may be used.
*5 When connecting two sub BC controllers, the total piping length must
be equal to or less than the maximum length as listed in the table
above.
*6 When connecting two sub BC controllers, install them in parallel.
*7 When the outdoor unit is 15-hp (P264 model) or more, use the HA-type
main BC controller. The GA-type BC controller cannot be connected to
the models between 27.5-hp (P264 model) and 30-hp (P288 model). The
G-type BC controller cannot be connected to the models between 15-
hp (P144 model) and 30-hp (P288 model).
*8 For Sub BC controller GB type, the connectable indoor unit capaci-
ties may sum to equal that of a P120 unit or less. However, if two sub
controllers are used the TOTAL sum of connectable units connected
to BOTH sub controllers must also not exceed that of a P120 unit.
For sub BC controller HB type, the connectable indoor unit capaci-
ties may sum to equal that or a P120 unit or less. However, if two sub
controllers are used the TOTAL sum of connectable units connected to
BOTH sub controllers must also not exceed that of a P168 unit.
*9 Indoor units that are connected to the same branch joint cannot be si-
multaneously operated in different operation modes.
*10 Do not connect the P72 or P96 models of indoor units and other mod-
els of indoor units at the same port.
*11 When connecting multiple indoor units to one branch port, those in-
door units must be installed in the same room.
6
Distance between MAIN BC controller and farthest indoor unit
70 [229]
60 [196]
50 [164]
40 [131]
30 [98]
20 [65]
10 [32]
0
0 5 [16]
Height difference between MAIN BC controller and farthest
indoor unit (m [ft])
10 [32] 15 [49]