Mitsubishi Electric SMART MULTI MXZ-SM36NAM2-U1 Data Book page 73

11. PIPING DESIGN
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 Indoor/Outdoor Section
Permissible 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
M-P0890
A
Note: Pipe re-branching after the header branching
A
B
A+B+C+a+b+c+d+e is 492 ft [150 m]
(L)
A+B+b is 262 ft [80 m]
( )
B+b 98 ft [30 m]
(H)
164 ft [50 m] (If the outdoor unit is lower, 131 ft [40 m] or less)
(h) 49 ft [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 Joint
CMY-Y62-G-E
(1) Refrigerant Piping Diameter In Section
From Outdoor Unit to First Branch
(Outdoor Unit Piping Diameter)
Model
Each
Section of
MXZ-SM60
Piping
(3) Refrigerant Piping Diameter In Section
From Branch to Branch
Liquid Line (inch [mm])
3/8 [ø9.52]
Refer to "11-3. Refrigerant charging calculation".
is not possible.
C
c d
3 4 5
B
D D
L
b
a 2
C
D D
1
Branch Header (4 branches)
CMY-Y64-G-E
(2) Refrigerant Piping Diameter In Section
Piping Diameter (inch [mm]) Model number
Liquid Line 3/8 [ø9.52]
18 or lower
Gas Line 3/4 [ø19.05]
Gas Line (inch [mm])
3/4 [ø19.05]
SMART MULTI
E
F
e
D
A Outdoor unit
B First branching (branching
joint)
C Branching joint
D Indoor unit
E Branching header
F Blind caps
Branch Header (8 branches)
CMY-Y68-G-E
From Branch to Indoor Unit
(Indoor Unit Piping Diameter)
Piping Diameter (inch [mm])
Liquid Line 1/4 [ø6.35]
Gas Line 1/2 [ø12.7]
Liquid Line 3/8 [ø9.52]
24 to 54
Gas Line 5/8 [ø15.88]
Liquid Line 3/8 [ø9.52]
72
Gas Line 3/4 [ø19.05]
71