Mitsubishi Electric City Multi PQHY-P72 Service Handbook page 70

4. Connecting the BC controller
(1) Size of the pipe that fits the standard BC controller ports
P72 and P96 models
To heat source unit
*1
Reducer
(Standard
supplied parts)
Indoor
P18 model or below P24-P54 models P72-P96 models
The ports of the BC controller accommodates the pipes on P18-P54 models of indoor units.
To connect other types of indoor units, follow the procedure below.
Operation
Heat source unit PQRY-P72TGMU-A
side
PQRY-P96TGMU-A
Indoor unit side
Connection: Brazed connection
BC controller
*2
Junction pipe kit
(Model name:
CMY-R160-J)
A
(Optional accessory)
Indoor
Indoor
High-pressure side (gas)
ø15.88 [5/8"] (Brazed connection)
ø19.05 [3/4"] (Brazed connection)
ø9.52 [3/8"] (Flare connection)
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Branch joint (Model name:CMY-Y102S-G)
(Optional accessory)
B
Indoor Indoor Indoor
3*
Maximum of 3 units per port
Total capacity of P160 or below
(All units connected to the same port
must be in the same operating mode.)
Pipe sections
ø19.05 [3/4"] (Brazed connection)
ø22.2 [7/8"] (Brazed connection)
ø15.88 [5/8"] (Flare connection)
[ II Restrictions ]
Unit: mm [in]
Low-pressure side (gas)