Mitsubishi Electric CITY MULTI PURY-P-YNW-A2 Installation Manual page 26

9-4-2. Example of pipe connection between an outdoor unit and BC controller, and
between a BC controller and indoor unit (R2 system)
Single
Unit 1
Ⓐ
Ⓜ
A
Ⓛ
A
Ⓑ
Ⓕ
a
b
a
b
Ⓠ Ⓡ
Ⓔ
Ⓓ
*1
Combination modules with main and sub BC controllers (P-JA type, P-KA type, and P-KB type)
Unit 1
Unit 2
Ⓐ
Ⓐ
A1
A2
A2
A1
Ⓚ
Ⓜ
A
Ⓛ
a
Ⓠ Ⓡ
Ⓓ
WT09973X01
Ⓓ
d
Ⓖ
B
B
c
c
Ⓓ
Ⓙ
Ⓗ
A Ⓞ
C
Ⓝ
C
Ⓟ
Ⓑ
C
Ⓕ
b
a
b
Ⓖ
B
B
c
c
Ⓔ Ⓓ
Ⓐ
Ⓑ
Ⓒ
Ⓓ
Ⓔ
Ⓕ
Ⓖ
Ⓗ
Ⓙ
d
Ⓚ
Ⓛ
Ⓜ
Ⓝ
Ⓞ
Ⓟ
Ⓠ
Ⓡ
Ⓓ
e
e
Ⓒ
D D Ⓗ
D
E G
G
E
E G
F
F
F
Ⓒ
f
d
f
d
Ⓓ Ⓓ
25
Outdoor unit
BC controller (Main)
BC controller (Sub)
Indoor unit (Total capacity of downstream indoor
units: 10 to 80)
Indoor unit (Total capacity of downstream indoor
units: 100 to 250)
Joint Pipe Kit
2-Branch Joint Pipe between BC controllers and
indoor units
2-Branch Joint Pipe between main and sub BC
controllers
Low-pressure Pipe Joint between outdoor units
and sub BC controllers
Outdoor unit twinning kit
High-pressure pipe (A, A , A )
1 2
Low-pressure pipe (A, A , A )
1 2
High-pressure pipe (C, D, E, F, G, H, J)
Low-pressure pipe (C, D, E, F, G, H, J)
Liquid pipe (C, D, E, F, G, H, J)
Liquid pipe (a, b, c, d, e, f, g, h)
Gas pipe (a, b, c, d, e, f, g, h)
Ⓗ
J
J
J
H
H
H
Ⓒ
g
g
Ⓓ
Ⓒ
h
h
Ⓓ