Mitsubishi Electric CITY MULTI PUHY-P108 Service Handbook page 72

(2) Size of the pipe that fits the main BC controller ports
P72-P234 models
Connection: brazed connection
To outdoor unit
*1
Reducer
(Standard
supplied parts)
Indoor unit Indoor unit
P18 model or below P24-P54models
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 P72 or P96 models of indoor units (or when the total capacity of indoor units exceeds P55), use a junc-
tion pipe kit (model name: CMY-R160J) 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
Refrigerant pipe selection (size of the pipes in sections A and B in the figure above): Select the proper size pipes
based on the total capacity of the downstream indoor units, using the table below as a reference.
Total capacity of indoor units
P54 or below
P55-P72
P73-P96
*1. Use the pipe that is supplied.
Operation
Outdoor unit side PURY-P72TGMU-A
PURY-P96TGMU-A
PURY-P108TGMU-A
PURY-P126TGMU-A
PURY-P144TGMU-A
PURY-P168TGMU-A
PURY-P192TGMU-A
PURY-P204TGMU-A
PURY-P216TGMU-A
PURY-P234TGMU-A
Indoor unit side
Main BC controller
Indoor unit
P72-P96 models
Liquid pipe
ø9.52 [3/8"]
High pressure side
ø15.88 [5/8"] (Brazed connection)
ø19.05 [3/4"] (Brazed connection)
ø22.2 [7/8"] (Brazed connection)
ø28.58 [1-1/8"] (Brazed connection)
ø9.52 [3/8"] (Flare connection)
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Branch joint (Model name:CMY-Y102S-G)
(Optional accessory
for use with the Y series
*2
of City Multi)
Junction pipe kit
(Model name:
CMY-R160-J)
(Optional accessory)
A B
Indoor unit Indoor unit
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.)
Gas pipe
ø15.88 [5/8"]
ø19.05 [3/4"]
ø22.2 [7/8"]
Pipe sections
Low-pressure side
ø19.05 [3/4"] (Brazed connection)
ø22.2 [7/8"] (Brazed connection)
ø28.58 [1-1/8"] (Brazed connection)
ø28.58 [1-1/8"] (Brazed connection)
ø15.88 [5/8"] (Flare connection)
[ II Restrictions ]
Indoor unit
Unit: mm [in]
*1
Unit: mm [in]