Mitsubishi Electric PUMY-P112VKM4 Technical & Service Manual page 143

Method of Combined Branching of
Lines and Headers
Connection Examples
(Connecting to 5 Indoor Units)
Total Piping Length
Permissible Farthest Piping Length
Length
Farthest Piping Length
After First Branch
High/Low Difference in
Permissible
Indoor/Outdoor Section
High/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)
(3) Section From Branch to
Branch (B, C)
Select the size from the table to the
right.
■ Additional refrigerant charge
OCH673D
A
Note: Pipe re-branching after the header branching
A
B
A+B+C+a+b+c+d+e is 300 meters or less
(L) A+B+b is 150 meters or less
B+b is 30 meters or less
(R)
The outdoor unit is upper: 50 meters or less
(H) The outdoor unit is lower: 40 meters or less (30 meters or less if PKFY-P10/15/20/25/32VLM,
PFFY-P*VKM, PFFY-P*VCM, PFFY-P*VL* type of indoor units are included.)
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 Joint
CMY-Y62-G-E
(1) Refrigerant Piping Diameter In Section
From Outdoor Unit to First Branch(Outdoor
Unit Piping Diameter)
Model
Each
PUMY-P112 Liquid Line
Section of
PUMY-P125
Piping
Gas Line
PUMY-P140
(3) Refrigerant Piping Diameter In Section
From Branch to Branch
Liquid Line (mm)
ø9.52
Refer to the same section in the previous page.
143
is not possible.
E
C
c d e
3 4 5
B
D D D
L
R
b
a 2
C
D D
1
Branch Header (4 branches)
CMY-Y64-G-E
(2) Refrigerant Piping Diameter In Section
Piping Diameter (mm) Model number
ø9.52
ø15.88
Note:
Gas Line (mm)
When connecting the CONNECTION KIT (PAC-
ø15.88 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.
F
A Outdoor unit
First branching (branching joint)
B
Branching joint
C
Indoor unit
D
Branching header
E
Blind caps
F
Branch Header (8 branches)
CMY-Y68-G-E
From Branch to Indoor Unit (Indoor Unit
Piping Diameter)
Piping Diameter (mm)
Liquid Line
– 50
Gas Line
Liquid Line
63 – 140
Gas Line
ø6.35
ø12.7
ø9.52
ø15.88