Bc Controller Connection Method - Mitsubishi Electric HP120TNU-A Service Handbook

[2-10 Restrictions on Refrigerant Pipes ]
2-10-3

BC Controller Connection Method

(1) Size of the pipe that fits the standard BC controller ports
HP72 - HP120 models
Connection: Brazed connection
To outdoor unit
Indoor
P05-P54 models
Note 1 Do not connect multiple indoor units to the same port when operating each of them in different mode (cooling, heating, stop,
and thermo-off).
The indoor units connected to the same port must be set to operate in the same mode. Set them in the same group to
make them run/stop in the same mode all together. For other options, enable the thermo setting on the remote controller,
or set the common thermostat (optional) to run/stop the units in the same mode based on a representative temperature.
The ports of the BC controller accommodates the pipes on P24-P54 models of indoor units.To connect other types of indoor
units, follow the procedure below.
Operation
Outdoor unit side HP72
HP96
HP120
Indoor unit side
* BC controllers can only be connected to HP72 - HP120 models of outdoor units.
HWE18220_GB
BC controller
Junction pipe kit
(Model name:
CMY-R160-J1)
(Optional accessory)
Indoor
Indoor
P05-P54 models P72-P96 models
High-pressure side (liquid)
ø15.88 [5/8"] (Brazed connection)
ø19.05 [3/4"] (Brazed connection)
ø19.05 [3/4"] (Brazed connection)
ø9.52 [3/8"] (Brazed connection)
Branch joint (Model name:CMY-Y102S-G2)
(Optional accessory)
B
A
Indoor Indoor Indoor
Maximum of 3 units per port
Total capacity of P54 or below (Note 1)
Pipe sections
ø19.05 [3/4"] (Brazed connection)
ø22.2 [7/8"] (Brazed connection)
ø28.58 [1-1/8"] (Brazed connection)
ø15.88 [5/8"] (Brazed connection)
Unit : mm [inch]
Low-pressure side (gas)
chapter 2 -
39