Mitsubishi Electric PQHY-P72TYHMU-A Service Handbook page 80

[ II Restrictions ]
(2) Size of the pipe that fits the main BC controller ports
P72 - P240 models
To heat
Connection: Brazed connection
source unit
*1
Reducer
(Standard supplied parts)
Indoor
P18 model or below P24-P54 models P72 or P96 model
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)
ŒMaximum total capacity of connected indoor units: P54 or below (in a system with a junction pipe: P96 or below)
ŒMaximum number of connectable indoor units: 3 units
ŒBranch joint: Use CMY-Y102S-G2 (optional accessory).
ŒRefrigerant 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.
Total capacity of indoor units
P54 or below
P55 - P72
P73 - P96
Heat source unit PQRY-P72THMU-A/YHMU-A
side
PQRY-P96THMU-A/YHMU-A
PQRY-P120THMU-A/YHMU-A
PQRY-P144TSHMU-A/YSHMU-A
PQRY-P168TSHMU-A/YSHMU-A
PQRY-P192TSHMU-A/YSHMU-A
PQRY-P216TSHMU-A/YSHMU-A
PQRY-P240TSHMU-A/YSHMU-A
HWE09080
BC controller (main)
(Model name:
CMY-R160-J)
(Optional accessory)
Indoor Indoor
Model
Indoor unit side
Branch joint (Model name:CMY-Y102S-G2)
A
*2
Junction pipe kit
Indoor
3*
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.)
Liquid pipe
ø9.52 [3/8"]
ø9.52 [3/8"]
ø9.52 [3/8"]
High pressure side (Liquid)
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)
- 71 -
(Optional accessory)
B
Indoor Indoor
Unit : mm [inch]
Gas pipe
ø15.88 [5/8"]
ø19.05 [3/4"]
ø22.2 [7/8"]
Unit : mm [inch]
Pipe sections
Low-pressure side (Gas)
ø19.05 [3/4"]
(Brazed connection)
ø22.2 [7/8"]
(Brazed connection)
ø28.58 [1-1/8"]
(Brazed connection)
ø15.88 [5/8"]
(Flare connection)
GB