MXZ-SM42NAMHZ Service Manual

146
OCH789
Branch box Method
Connection Examples
(Connecting to 8 Indoor Units)
A
B
C
L
h2
H
AOutdoor unit
BBranching joint
CBranch box
DIndoor unit
a
b
d
c
e
f
g
h
l
h2
H
h1
h3
C
A
B
C
D
D D D
D
D
D
D
Permissible
length
(One-way)
Total piping length
A + B + C + a + b + c + d + e + f + g + h [ 492 ft [150 meters]
Farthest piping length (L)
A + C + h [ 262 ft [80 meters]
Piping length between outdoor unit and branch boxes
A + B + C [ 180 ft [55meters]
Farthest piping length after branch box (I)
l [ 82 ft [25 meters]
Total piping length between branch boxes and indoor units
a + b + c + d + e + f + g + h [ 312 ft [95 meters]
Permissible
height
di󰀨erence
(One-way)
In indoor/outdoor section (H)
*1
H [ 164 ft [50 meters]
(In the case of that outdoor unit is set higher than indoor unit)
H [ 131 ft [40 meters]
(In the case of that outdoor unit is set lower than indoor unit)
In branch box/indoor unit section (h1)
h1 + h2 [ 49 ft [15 meters]
In each branch unit (h2)
h2 [ 49 ft [15 meters]
In each indoor unit (h3)
h3 [ 39 ft [12 meters]
Number of bends
[ 15
*1
Branch box should be placed within the level between the outdoor unit and indoor units.
■ SelectEachSectionofRefrigerant
Piping
(1) Section From Outdoor Unit
to Branch box (A, B, C)
Each
Section of
Piping
(2) Sections From Branch box
to Indoor Unit (a to h)
Select the size from the table to the
right.
(1)
Refrigerant Piping Diameter In Section From Outdoor Unit to Branch box (Outdoor Unit Piping Diameter)
Model Piping Diameter (inch[mm])
MXZ-SM36/42/48
Liquid Line 3/8 [ø9.52]
Gas Line 5/8 [ø15.88]
MXZ-SM60
Liquid Line 3/8 [ø9.52]
Gas Line 3/4 [ø19.05]
(2)
Refrigerant Piping Diameter In Section From Branch box to Indoor Unit (Indoor Unit Piping Diameter)
Indoor unit series Model number A Liquid pipe (inch[mm]) B Gas pipe (inch[mm])
M series or
S series
– 12
1/4 [ø6.35]
3/8 [ø9.52]
15,18 1/2 [ø12.7]
24 – 3/8 [ø9.52] 5/8 [ø15.88]
P series
– 18 1/4 [ø6.35] 1/2 [ø12.7]
24 – 3/8 [ø9.52] 5/8 [ø15.88]
■ Additionalrefrigerantcharge Refer to the same section in the previous page.