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[ II Restrictions ]
- 71 -
HWE09080 GB
(2) Size of the pipe that fits the main BC controller ports
P72 - P240 models
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.
1) To connect P06-P18 models of indoor units use the reducer that is supplied with the BC controller.
2) To connect the units between the P36 and P96 models of indoor units (or when the total capacity of indoor units is P31
or above), use a junction pipe kit and merge the two nozzles.
3) To connect multiple indoor units to a port (or to a junction pipe)
Maximum total capacity of connected indoor units: P54 or below (in a system with a junction pipe: P96 or below)
Maximum number of connectable indoor units: 3 units
Branch joint: Use CMY-Y102S-G2 (optional accessory).
Refrigerant pipe selection (size of the pipes in sections A and B in the figure above): Select the proper based on the total
capacity of the downstream indoor units, using the table below as a reference.
Unit : mm [inch]
Total capacity of indoor units Liquid pipe Gas pipe
P54 or below ø9.52 [3/8"] ø15.88 [5/8"]
P55 - P72 ø9.52 [3/8"] ø19.05 [3/4"]
P73 - P96 ø9.52 [3/8"] ø22.2 [7/8"]
Unit : mm [inch]
Model
Pipe sections
High pressure side (Liquid) Low-pressure side (Gas)
Heat source unit
side
PQRY-P72THMU-A/YHMU-A ø15.88 [5/8"]
(Brazed connection)
ø19.05 [3/4"]
(Brazed connection)
PQRY-P96THMU-A/YHMU-A
ø19.05 [3/4"]
(Brazed connection)
ø22.2 [7/8"]
(Brazed connection)
PQRY-P120THMU-A/YHMU-A
PQRY-P144TSHMU-A/YSHMU-A
ø22.2 [7/8"]
(Brazed connection)
ø28.58 [1-1/8"]
(Brazed connection)
PQRY-P168TSHMU-A/YSHMU-A
PQRY-P192TSHMU-A/YSHMU-A
PQRY-P216TSHMU-A/YSHMU-A
ø28.58 [1-1/8"]
(Brazed connection)
PQRY-P240TSHMU-A/YSHMU-A
Indoor unit side ø9.52 [3/8"]
(Flare connection)
ø15.88 [5/8"]
(Flare connection)
A B
Indoor Indoor Indoor
P18 model or below
P24-P54 models P72 or P96 model
*2
Junction pipe kit
(Model name:
CMY-R160-J)
(Optional accessory)
BC controller (main)
To heat
source unit
Connection: Brazed connection
*1
Reducer
(Standard supplied parts)
Maximum of 3 units per port
Total capacity of P54 or below
(All units connected to the same port
must be in the same operating mode.)
3*
Indoor Indoor Indoor
Branch joint (Model name:CMY-Y102S-G2)
(Optional accessory)