Samsung AM***XMDCH Series Installation Manual page 14

Refrigerant pipe installation
Selecting Y-joint
Select the first Y-joint according to main pipe size of each outdoor unit capacity.
Select the other Y-joints according to the total indoor unit capacity under the selected Y-joint.
Selecting the first Y-joint
Outdoor unit capacity
[HP(Ton)]
7(5)
Keeping refrigerant pipe
To prevent foreign materials or water from entering the pipe, it is important to keep the refrigerant pipe clean and dry and to
seal it during installation.
Apply correct sealing method depending on the environment.
Exposure place
Outside exposure
Inside exposure
Refrigerant pipe brazing and safety information
Important information for refrigerant pipe work
Make sure that there is no moisture inside the pipe.
Make sure that there are no foreign materials and impurities in the pipe.
Make sure that there is no leak.
Make sure to follow the instruction when brazing and keeping the pipe.
Nitrogen flushing brazing
Use Nitrogen gas when brazing the pipes as shown in the picture.
If you do not perform nitrogen flushing when brazing the pipes, oxide may form inside the pipe. It can cause the damage
of the important parts such as compressor, valves.
Adjust the flow rate of the Nitrogen flushing with a pressure regulator to maintain 0.05m3/h or less.
Brazing part
Nitrogen gas
Pressure regulator
Taping
Flow meter
14
Y-joint model
MXJ-YA2512✴
Longer than one month
Shorter than one month
Ø6.35(1/4") copper pipe
Shut-off
valve
High pressure hose
Total indoor unit capacity under the
selected Y-joint [kW (Btu/h)]
X ≤ 15.0 (51000)
15.0 (51000) < X ≤ 40.6 (138000)
Exposure time
-
Other Y-joints
Y-joint model
MXJ-YA1509✴
MXJ-YA2512✴
Sealing type
Pipe pinch
Taping
Taping