Mitsubishi Electric SMART MULTI MXZ-SM36NAM2-U1 Data Book page 71

11. PIPING DESIGN
11-2-2. MXZ-SM60NAM2-U1
Line-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 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)
(3) Section From Branch to
Branch (B,C)
Select the size from the table to the right.
Additional refrigerant charge
M-P0890
A
B
A+B+C+a+b+c+d
(L)
A+B+C+d 262 ft [80 m]
( )
B+C+d 98 ft [30 m]
(H)
164 ft [50 m] (If the outdoor unit is lower, 131 ft [40 m])
(h)
49 ft [15 m]
Use an optional branch piping kit (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]) Gas Line (inch[mm])
3/8 [ø9.52]
Refer to "11-3. Refrigerant charging calculation".
A
L
B C
a b c
C
C C
492 ft [150 m]
(2) Refrigerant Piping Diameter In Section
Piping Diameter (inch[mm]) Model number
Liquid Line 3/8 [ø9.52]
Gas Line 3/4 [ø19.05]
3/4 [ø19.05]
SMART MULTI
d
C
A Outdoor Unit
B First Branch
C Indoor unit
From Branch to Indoor Unit
(Indoor Unit Piping Diameter)
Piping Diameter (inch[mm])
Liquid Line 1/4 [ø6.35]
18 or lower
Gas Line 1/2 [ø12.7]
Liquid Line 3/8 [ø9.52]
24 o54
Gas Line 5/8 [ø15.88]
Liquid Line 3/8 [ø9.52]
72
Gas Line 3/4 [ø19.05]
69