Mitsubishi Electric CITY MULTI PUMY-P200YKM2R2 Technical & Service Manual page 124

Header-Branch Method
Connection Examples
(Connecting to 4 Indoor Units)
Permissible Total Piping Length
Length
Farthest Piping Length
Farthest Piping Length
After First Branch
Permissible High/Low Difference in
High/Low Indoor/Outdoor Section
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)
Select the size from the table to the
right.
■ Additional refrigerant charge
OCH675E
A
A+a+b+c+d [ 150 m
(L) A+d [ 80 m
d is 30 meters or less
(R)
50 meters or less (If the outdoor unit is lower, 40 meters or less)
(H)
15 meters or less
(h)
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
Model
Section of
Liquid pipe
Piping
L [ 60m
L > 60m
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
r
B
a b c
C C
c
Branch header (8 branches)
CMY-Y68-G-E
(2) Refrigerant Piping Diameter In Section
Piping Diameter (mm)
Model number
Gas pipe
ø9.52
ø19.05
ø12.7
124
d
Outdoor Unit
C A
First Branch
B
Indoor unit
C
From Branch to Indoor Unit (Indoor Unit
Piping Diameter)
Piping Diameter (mm)
Liquid Line
–
50
Gas Line
Liquid Line
–
63 140
Gas Line
Liquid Line
200
Gas Line
ø6.35
ø12.7
ø9.52
ø15.88
ø9.52
ø19.05