Mitsubishi Electric PQHY-P72ZLMU-A Service Handbook page 79

[ II Restrictions ]
3. Connecting the BC controller <PQRY>
(1) Size of the pipe that fits the standard BC controller ports
P72 - P120 models
Connection: Brazed connection
To heat
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.
Heat source unit side
Indoor unit side
* BC controllers can only be connected to P72 - P120 models of heat source units.
HWE15150
BC controller
*2
Junction pipe kit
(Model name:
CMY-R160C-J)
(Optional accessory)
Indoor
Indoor
Operation
P72
P96
P120
Twinning kit (Model name:CMY-Y102SS-G2)
(Optional accessory)
B
A
Indoor 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.)
Pipe sections
High-pressure side (liquid)
ø15.88 [5/8"]
(Brazed connection)
ø19.05 [3/4"]
(Brazed connection)
ø9.52 [3/8"]
(Flare connection)
- 70 -
Indoor
Unit : mm [inch]
Low-pressure side (gas)
ø19.05 [3/4"]
(Brazed connection)
ø22.2 [7/8"]
(Brazed connection)
ø15.88 [5/8"]
(Flare connection)
GB