Mitsubishi Electric CITY MULTI, Техническое и сервисное руководство

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143
OCH673D
Method of Combined Branching of
Lines and Headers
Connection Examples
(Connecting to 5 Indoor Units)
Outdoor unit
First branching (branching joint)
Branching joint
Indoor unit
Branching header
Blind caps A
B
C
D
E
F
B
A
E
F
C
D
D D D
D
A
C
b
B
3
H
h
4
L
R
5
1
2
c d e
a
Note: Pipe re-branching after the header branching
is not possible.
Permissible
Length
Total Piping Length A+B+C+a+b+c+d+e is 300 meters or less
Farthest Piping Length (L) A+B+b is 150 meters or less
Farthest Piping Length
After First Branch
(
R
) B+b is 30 meters or less
Permissible
High/Low
Difference
High/Low Difference in
Indoor/Outdoor Section
(H)
The outdoor unit is upper: 50 meters or less
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.)
High/Low Difference in
Indoor/Indoor Section
(h) 15 meters or less
■ Selecting the Refrigerant Branch Kit 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 Branch Header (4 branches) Branch Header (8 branches)
CMY-Y62-G-E CMY-Y64-G-E CMY-Y68-G-E
■ Select Each Section of Refrigerant
Piping
(1) Section From Outdoor
Unit to First Branch (A)
Each
Section of
Piping
(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.
(1) Refrigerant Piping Diameter In Section
From Outdoor Unit to First Branch(Outdoor
Unit Piping Diameter)
Model Piping Diameter (mm)
PUMY-P112
PUMY-P125
PUMY-P140
Liquid Line ø9.52
Gas Line ø15.88
(3) Refrigerant Piping Diameter In Section
From Branch to Branch
Liquid Line (mm) Gas Line (mm)
ø9.52 ø15.88
(2) Refrigerant Piping Diameter In Section
From Branch to Indoor Unit (Indoor Unit
Piping Diameter)
Model number Piping Diameter (mm)
– 50
Liquid Line ø6.35
Gas Line ø12.7
63 – 140
Liquid Line ø9.52
Gas Line ø15.88
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.
■ Additional refrigerant charge Refer to the same section in the previous page.