Example Of Refrigerant Piping Selection - Mitsubishi Electric PEFY-P-VML-E Data Book

3. Example of refrigerant piping selection

1 Example 1
Outdoor unit : PUHY-P200
A
Joint 1
Pipe C
Select by total capacity of
indoor units on
downstream side.
(Table-3)
Liquid pipe ø 9.52
Gas pipe ø 15.88
(1) Selection of branch pipe kit
Branch area
Joint 1
Joint 2
Header
(2) Selection of pipe size
Pipe area
A
B
C
a
b
c
d
e
Pipe A
Select by outdoor unit
capacity. (Table-1)
Liquid pipe ø 9.52
Gas pipe ø 19.05
Liquid pipe
Gas pipe
Branch joint 1
Select by total capacity of
indoor units on
downstream side.
(Table-2)
Model CMY-Y102L-G
Joint 2
C
d
32
Type
Branch joint 2
Select by total capacity of
indoor units on
downstream side.
(Table-2)
Model CMY-Y102L-G
Branch pipe kit selection method
32 + 40 + 50 + 63 + 63 = 248
32 + 50 = 82
For 4 branches with 8 HP outdoor unit
Refrigerant pipe selection method
Same as size of outdoor unit's refrigerant pipe
40 + 63 + 63 = 166
32 + 50 = 82
Same as size of indoor unit's refrigerant pipe
Pipe B
Select by total capacity of
indoor units on
downstream side.
(Table-3)
ø 9.52
ø 19.05
B
e
50
Type
Branch pipe kit model
CMY-Y102L-G
(201 or above)
(200 or below)
CMY-Y102S-G
CMY-Y104-G
(141~ 200)
( ~ 140)
2- 8
Branch header
Select by number of
indoor units connected.
(Table-2)
Model CMY-Y104-G
4-branch header
b
a
40 63
Type Type
Pipes a to e
Same as size of indoor unit
(Table-4) pipes.
Liquid pipe size
Gas pipe size
ø9.52
ø9.52
ø9.52
ø6.35
ø9.52
ø9.52
ø6.35
ø9.52
c
63
Type
ø19.05
ø19.05
ø15.88
ø12.7
ø15.88
ø15.88
ø12.7
ø15.88