Mitsubishi Electric CITY MULTI CMB-P-V-E Serie Manuel D'installation page 9

2. For connecting 20 to 40 type indoor units (*1)
Connect indoor units using the reducers (specials) supplied with BC
controllers.
A
A Liquid pipe side: 3/8F (flare)
Gas pipe side: 5/8F (flare)
B Liquid pipe side: ø6.35 ID
Gas pipe side: ø12.7 ID
Note:
The flare nuts supplied with BC controllers should be used together.
3. For connecting 100 to 125 type indoor units (or more than a
total indoor unit capacity of 81) (*2)
After combining two branch holes using an optionally available com-
bined piping kit (Model name: CMY-R160-F), connect indoor units.
A
C Connecting pipe on liquid pipe side
D ø12.7 ID
E ø9.52 OD
F Liquid pipe side: ø9.52 ID (with insulation cover)
Gas pipe side: ø19.05 ID (with insulation cover)
70
B
325
E
D
C
F
4. Connection of plural indoor units with one connection (or joint
pipe) (*3)
• Total capacity of connectable indoor units: Less than 80 (Less than
160 with joint pipe)
• Number of connectable indoor units: Maximum 3 Sets
• Branch pipe: Use the branch pipe for CITYMULTI Y Series (CMY-
Y102S-F)
• Selection of refrigerant piping (Piping size of A/B sections in the above
figure)
Select the size according to the total capacity of indoor units to be
installed downstream.
Total capacity of indoor units
Below 80
81 to 160
5. Connecting to outside pipes (low pressure side pipes)
• For PURY-250YMF-B
PURY-P250YMF-B
A
B
• For PURY-200YMF-B
PURY-P200YMF-B
A
B
A Packing (accessory)
B BC controller
C External diameter ø28.58
D Tightening torque 25Nm (250kgf·cm) (Be careful not to tighten unevenly.)
E Connecting pipe (accessory)
F Locally procured pipe ø28.58
G Elongate the pipe end, and braze it to the connecting pipe.
H External diameter ø25.4
I Locally procured pipe ø25.4
J Cut the connecting pipe at a section of ø25.4.
Note:
Be sure to use non-oxidative brazing.
Liquid line Gas line
ø9.52 ø15.88
ø12.7 ø19.05
D
F
E
G
C
J I
G
H
9