Samsung RD VHXF Series Installation Manual page 17

Pipe size between branch joints : (B)
Select the pipe size according to the capacity sum of indoor
units which are connected below this pipe.
Total Indoor
Liquid
unit's capacity
mm
51MBH
51~79MBH Ø9.52
79~96MBH
96~138MBH
Ø12.70
138~160MBH
160~240MBH Ø15.88
240~336MBH
Ø19.05
336~468MBH
Pipe size between branch joints and indoor unit (C)
Select the pipe size according to the indoor unit's capacity.
Indoor unit's
Liquid
capacity
mm
6~20MBH Ø6.35
24~48MBH Ø9.52
Branch joint : (D), (E), (F)
 Branch joint of outdoor unit's multi connection (D)
Outdoor multi
Model
connection
branch joint (D)
MXJ-T3819
 First branch joint (E)
Select branch joint according to the outdoor unit's
capacity.
Model
MXJ-YA2512 6, 8,10 Ton
Y-joint
MXJ-YA2812 12 Ton
(E)
MXJ-YA2815 14,16,18,20 Ton
MXJ-YA3119 22, 24, 26, 28 Ton
MXJ-YA3819 30 Ton
 Branch joint (F)
Select the pipe size according to the capacity sum of
indoor units which are connected below this pipe.
1) Y-joint
Model Capacity of outdoor unit
MXJ-YA1509 51 MBH and below
MXJ-YA2512 Over 51 MBH ~ 138 MBH and below
Y-joint
MXJ-YA2812 Over 138 MBH ~ 160 MBH and below
(F)
MXJ-YA2815 Over 160 MBH ~ 240 MBH and below
MXJ-YA3119 Over 240 MBH ~ 336 MBH and below
MXJ-YA3819 Over 336 MBH ~ 468 MBH and below
2) Header joint
Total Indoor
Model
unit's capacity
Header
160 MBH and
joint
MXJ-HA2512
below
(F)
Over 160 MBH~
MXJ-HA3115
240 MBH
MXJ-HA3819 Over 240 MBH
Pipe size (O.D)
Gas
inches mm inches
Ø15.88 Ø5/4
Ø3/8 Ø19.05 Ø3/4
Ø22.23 Ø7/8
Ø1/2
Ø28.58 Ø1-1/8
Ø5/8
Ø3/4 Ø34.93 Ø1-3/8
Pipe size (O.D)
Gas
inches mm inches
Ø1/4 Ø12.70 Ø1/2
Ø3/8 Ø15.88 Ø5/8
Capacity of outdoor
unit
12 ~ 30 Ton
Capacity of outdoor unit
The
connectable
quantity of
indoor units
4
8
8
Tempers of pipe
Pipe size Thickness
mm inches mm
Ø6.35 Ø1/4
0.7
Ø9.52 Ø3/8
Ø12.70 Ø1/2 0.8
Ø15.88 Ø5/8 1.0
Ø19.05 Ø3/4
0.9
Ø22.23 Ø7/8
Ø25.40 Ø1 1.0
Ø28.58 Ø1-1/8
1.1
Ø31.75 Ø1-1/4
Ø34.93 Ø1-3/8 1.2
Ø38.10 Ø1-1/2 1.35
Ø44.45 Ø1-3/4 1.6
Ø50.80 Ø2 2.0
• Make sure to use C1220T-1/2H pipe for
more than Ø19.05mm(3/4˝).
CAUTION
In case of using C1220T-O pipe for
Ø19.05mm(3/4˝) pipe may be broken,
which can result in an injury.
Material
inches
0.027
C1220T-O (Annealed)
0.031
0.039
0.035
0.039
C1220T-1/2H
0.043
(Drawn temper)
0.047
0.053
0.062
0.079
installing the unit _17