Mitsubishi Electric PUMY-P36NKMU3 Technical & Service Manual page 134

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 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)
Select the size from the table to the right.
■
Additional refrigerant charge
OCH733
A
A
B
a
C
A+a+b+c+d [ 492 ft [150 meters]
(L) A+d [ 262 ft [80 meters]
(R)
d is 100 ft [30 meters]
(H)
164 ft [50 meters] (If the outdoor unit is lower, 131 ft [40 meters])
(h) 49 ft [15 meters]
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
(Outdoor Unit Piping Diameter)
Each
Model
Section of
Piping
PUMY-P60NKMU3
(3) Refrigerant Piping Diameter In Section
From Branch to Branch
Liquid Line (inch [mm])
3/8 [ø9.52]
Refer to the same section in the previous page.
L
r
b c
C
c
Branch header (8 branches)
CMY-Y68-G-E
(2) Refrigerant Piping Diameter In Section
Piping Diameter (inch[mm]) Model number
Liquid Line 3/8 [ø9.52]
Gas Line 3/4 [ø19.05]
Gas Line (inch [mm])
3/4 [ø19.05]
134
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 to 54
Gas Line 5/8 [ø15.88]
Liquid Line 3/8 [ø9.52]
72
Gas Line 3/4 [ø19.05]