Samsung AM TXMDEH Series Installation Manual page 14

Refrigerant pipe installation
Selecting refrigerant pipe
Temper grade and minimum thickness of the refrigerant pipe
Outer diameter [mm]
ø6.35
ø9.52
ø12.70
ø15.88
ø19.05
ø22.23
For pipes larger than Ø 19.05, drawn type (C1220T-1/2H or C1220T-H) type copper pipe must be used. If a
annealed type (C1220T-O) copper pipe is used, pipe may break due to its low pressure resistance and cause
CAUTION
personal injury.
Pipe installation between an outdoor unit and the first Y-joint
Outdoor unit capacity [HP]
4
5
6
Install the refrigerant pipe according to main pipe size of each outdoor unit capacity.
When the pipe length between an outdoor unit and the farthest indoor unit including elbow exceeds 90 m, the gas pipe
size should be upgraded one step among the main pipes from the outdoor unit to the first Y-joint. (The liquid pipe size
will be maintained.)
If the capacity of the outdoor unit can decline due to the pipe length, upgrade the pipe size one step (gas pipe).
Main pipe size up
Pipe installation between Y-joints
Indoor unit total
capacity(kW)
X ≤ 15.0
15.0 < X ≤ 23.2
14
Minimum thickness [mm]
Liquid pipe [mm]
ø9.52
ø9.52
ø9.52
First Y-joint
Liquid pipe (mm)
ø9.52
0.7
0.7
0.8
1.0
0.9
0.9
Gas pipe [mm]
ø15.88
ø15.88
ø19.05
Temper grade
Annealed
Drawn
One step upgraded pipe
[mm]
ø19.05
ø19.05
ø22.23
Gas pipe (mm)
ø15.88
ø19.05