Samsung AM***MXWA Series - Indoor Unit Pipe Sizing

ENGLISH-22
Refrigerant pipe installation
Size of the pipe between the branch joint and the indoor unit
Make a selection according to outdoor unit capacity.
Indoor unit capacity (kW)
Pipe size (O.D. mm)
Liquid pipe Gas pipe
6.0kW and below Ø 6.35 Ø 12.70
7.1kW ~ 16.0kW and below Ø 9.52 Ø 15.88
20.0kW ~ 23.0kW and below Ø 9.52 Ø 19.05
Over 23.0kW Ø 9.52 Ø 22.22
Branch joint
 Branch joint between outdoor units (C)
Classication Model name Specication (kW)
Y-joint for outdoor unit (C)
MXJ-TA3419M 134.4kW and below
MXJ-TA4122M 140.0 kW and over
 First branch joint (D)
Make a selection according to outdoor unit capacity.
Classication Outdoor unit capacity (kW) Model name of the branch joint
Y-joint (D)
33.6kW and below MXJ-YA2512M
44.8kW MXJ-YA2812M
50.4 kW ~ 67.2 kW MXJ-YA2815M
72.8kW ~ 95.2kW MXJ-YA3419M
100.8kW ~ 134.4kW MXJ-YA4119M
140.0kW and over MXJ-YA4422M
 Branch joint (E)
Select a branch joint according to the sum of indoor unit capacity which will be connected after the branch.
Ú However, if the size of the pipe between branch joints (E) is bigger than the size of the pipe connected to the outdoor unit
(D), apply the pipe size (D).
1) Y-joint
Classication Model name Specication (kW)
Y-joint (E)
MXJ-YA1509M 15.0kW and below
MXJ-YA2512M Over 15.0kW ~ 40.0kW and below
MXJ-YA2812M Over 40.0kW ~ 45.0kW and below
MXJ-YA2815M Over 45.0kW ~ 70.3kW and below
MXJ-YA3419M Over 70.3kW ~ 98.4kW and below
MXJ-YA4119M Over 98.4kW ~ 135.2kW and below
MXJ-YA4422M Over 135.2kW
2) Distribution header
Classication Model name Specication (kW)
Distribution header (E)
MXJ-HA2512M 45.0kW and below (for 4 rooms)
MXJ-HA3115M 70.3kW and below (for 8 rooms)
MXJ-HA3819M Over 70.3kW (for 8 rooms)