Mitsubishi Electric PUMY-P112VKM4 Technical & Service Manual page 142

Header-Branch Method
Connection Examples
(Connecting to 4 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)
Select the size from the table to the
right.
■ Additional refrigerant charge
OCH673D
A+a+b+c+d [ 300 m
(L) A+d [ 150 m
d 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 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
PUMY-P112 Liquid Line
Piping
PUMY-P125
PUMY-P140
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
A
B
a b c
C C
c
Branch header (8 branches)
CMY-Y68-G-E
(2) Refrigerant Piping Diameter In Section
Piping Diameter (mm)
ø9.52
Gas Line ø15.88
142
A Outdoor Unit
B First Branch
C Indoor unit
L
r
d
C
From Branch to Indoor Unit (Indoor Unit
Piping Diameter)
Model Piping Diameter (mm)
Liquid Line
– 50
Gas Line
Liquid Line
63 – 140
Gas Line
ø6.35
ø12.7
ø9.52
ø15.88