Mitsubishi Electric PUMY-P250YBM2-ER Technical & Service Manual page 118

Header-Branch Method
Connection Examples
(Connecting to 6 Indoor Units)
Total Piping Length
Permissible
Length
Farthest Piping Length
Farthest Piping Length After First Branch
Permissible High/
High/Low Difference in Indoor/Outdoor Section
Low Difference
High/Low Difference in Indoor/Indoor Section
■
Selecting the Refrigerant Branch Kit
■
Select Each Section of Refrigerant Piping
(1) Section From Outdoor Unit
to First Branch (A)
(2) Sections From Branch to
Indoor Unit (a,b,c,d,e,f)
Select the size from the table to the right.
■
Additional refrigerant charge
TCH091
A
A+a+b+c+d+e+f [ 310 m
(L)
A+ f [ 150 m
(R)
f [ 30 m
H [ 50 m (In the case of outdoor unit is set higher than indoor unit)
(H)
H [ 40 m (In the case of outdoor unit is set lower than indoor unit)
(h)
h [ 15 m
Please select branching kit, which is sold separately, from the table below.
(The kit comprises sets for use with liquid pipes and for use with gas pipes.)
Branch header (4 branches)
CMY-Y64-G-E
(1) Refrigerant Piping Diameter In Section
From Outdoor Unit to First Branch (Out-
door Unit Piping Diameter)
Each
Section of
A
Piping
Model
L 90 m
[
P250
>
L 90 m
P300 All
L: The farthest piping length from the outdoor unit to
an indoor unit.
* ø12.7 when connecting the indoor unit for
PEFY-P200 or P250.
Note: When connecting the CONNECTION KIT
(PAC-LV11M-J) and an M-series indoor unit, refer to
the installation manual for the CONNECTION KIT
when selecting the pipe size and piping length.
Refer to the same section in the previous page.
A
L
B
D
a b c d e
C C
C C C
Branch header (8 branches)
CMY-Y68-G-E
(mm)
A Liquid pipe B Gas pipe
9.52* 22.2
ø ø
12.7 22.2
ø ø
12.7 22.2
ø ø
118
r
f
A Outdoor Unit
B First Branch
C Indoor unit
C
Cap
D
(2) Refrigerant Piping Diameter In Section
From Branch to Indoor Unit (Indoor Unit
Piping Diameter)
a, b, c, d, e, f
Model number Liquid pipe Gas pipe
6.35
10 - 50
ø
63 - 140
9.52
ø
200 9.52
ø
250
9.52
ø
(mm)
12.7
ø
15.88
ø
19.05
ø
22.2
ø