Mitsubishi Electric PURY-P200 Service Handbook page 46

(3) BC controller (sub) end connection piping size
Main BC controller
Sub BC controller
✻1
Reducer
(supplied)
Indoor unit Indoor unit
P50 type P63-P140
or below types
The size of the branch end connection on the BC controller is designed to fit P63-P140 type indoor units.
To connect other types of indoor units, perform the following procedures.
✻1: To connect P20-P50 type indoor units, use the reducer that is supplied with the BC controller
✻2: To connect P200 or P250 type indoor units (or when the total capacity of the indoor units exceeds P141),
use an optional junction pipe kit (Type: CMY-R160-J) and merge the 2 joints.
✻3: To connect multiple indoor units to a branch joint (or to a junction pipe)
• Total capacity of connectable indoor units : P140 or below (P250 or below when a junction pipe is used)
• The number of connectable indoor units
• Selection of refrigerant piping (pipe size of the A and B in the figure above)
: Use the total capacity of the downstream indoor units to determine the proper pipe size, using the
table below as a reference.
Total capacity of the indoor units
P140 or below
P141~P200
P201~P250
(❈) With reducer
Item
Total capacity of indoor units
connected to applicable BC controller
P200 type and below
BC
controller
P201-P300 types
side
P301 types and above
End connection:
brazed connection
✻2
Junction pipe kit
(Type: CMY-R160-J)
(option)
A
Indoor unit Indoor unit
P200-P250
types
: 3 max.
Liquid pipe
ø 9.52
ø 9.52
ø 9.52
Piping sections
- 43 -
Branch pipe (Type: CMY-Y102S-G)
(For CITY MULTI Y series, option)
B
Indoor unit
Maximum of 3 units per branch joint.
Total capacity of P140 or less
(All units connected to the same
branch joint must be in the same mode.)
Gas pipe
ø 15.88
ø 19.05
ø 22.2 (❈)
High-pressure side Low-pressure side
(liquid side) (gas side)
ø 19.05
15.88
ø
(Brazed)
(Brazed)
ø 22.2
(Brazed)
ø 19.05
(Brazed) 28.58
ø
(Brazed)
Indoor unit
Liquid side
ø 9.52
(Brazed)
12.7
ø
(Brazed)