14
Refrigerant pipe installation
Selecting Y-joint
X
X
Select the first Y-joint according to main pipe size of each outdoor unit capacity .
X
X
Select the other Y-joints according to the total indoor unit capacity under the selected Y-joint .
Selecting the first Y-joint
Other Y-joints
Outdoor unit capacity
[HP(Ton)]
Y-joint model
Total indoor unit capacity under the
selected Y-joint [kW (Btu/h)]
Y-joint model
4(3)
MXJ-YA1509
✴
X ≤ 15 .0 (51000)
MXJ-YA1509
✴
5(4)
MXJ-YA1509
✴
15 .0 (51000) < X ≤ 40 .6 (138000)
MXJ-YA2512
✴
6(5)
MXJ-YA2512
✴
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
Exposure time
Sealing type
Outside exposure
Longer than one month
Pipe pinch
Shorter than one month
Taping
Inside exposure
-
Taping
Refrigerant pipe brazing and safety information
Important information for refrigerant pipe work
X
X
Make sure that there is no moisture inside the pipe .
X
X
Make sure that there are no foreign materials and impurities in the pipe .
X
X
Make sure that there is no leak .
X
X
Make sure to follow the instruction when brazing and keeping the pipe .
Nitrogen flushing brazing
X
X
Use Nitrogen gas when brazing the pipes as shown in the picture .
X
X
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 .
X
X
Adjust the flow rate of the Nitrogen flushing with a pressure regulator to maintain 0 .05m3/h or less .
Brazing part
Nitrogen gas
Ø6 .35(1/4") copper pipe
Shut-off
valve
Taping
Flow meter
High pressure hose
Pressure regulator
DVM S Eco_IM_03408A-05_EN.indd 14
2016-11-11 오후 1:27:49
