Mitsubishi Electric CITY MULTI PUHY-P108 Service Handbook page 71

[ II Restrictions ]
1) To connect P06-P18 models of indoor units use the
reducer that is supplied with the BC controller.
Liquid pipe side:3/8F
(Flare connection)
Gas pipe side:5/8F
(Flare connection)
Note) Use the flare nut that is supplied with the BC controller.
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-G (optional accessory).
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 refer-
ence.
Total capacity of indoor units
P54 or below
P55-P72
P73-P96
*1. Use the pipe that is supplied.
70 [2-25/32"]
Liquid pipe side: 6.35[1/4"]ID
Gas pipe side: 12.7[1/2"]ID
2) To connect P72 or P96 models of indoor units (or when the
total capacity of indoor units exceeds P55), use a junction
pipe kit (model name: CMY-R160J) and merge the two
nozzles.
Liquid pipe side:3/8F
(Flare connection)
Gas pipe side:5/8F
(Flare connection)
Liquid pipe
ø9.52 [3/8"]
- 62 -
234 [9-7/32"]
Liquid pipe side: 9.52[3/8]ID
Gas pipe side: 19.05[3/4]ID(*1)
*1 To connect P280 models of indoor units, use
[7/8"]
the 22.2 ID reducer that is supplied.
Supplied with a thermal insulation cover
Unit: mm [in]
Gas pipe
ø15.88 [5/8"]
ø19.05 [3/4"]
*1
ø22.2 [7/8"]