15
Selecting Y-joint
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Select the first Y-joint according to main pipe size of each outdoor unit capacity.
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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)
Y-joint model
Total indoor unit capacity
under the selected Y-joint
(kW)
Y-joint model
4
MXJ-YA1509
✴
X ≤ 15.0
MXJ-YA1509
✴
5
MXJ-YA1509
✴
15.0 < X ≤ 40.6
MXJ-YA2512
✴
6
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
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Make sure that there is no moisture inside the pipe.
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Make sure that there are no foreign materials and impurities in the pipe.
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Make sure that there is no leak.
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Make sure to follow the instruction when brazing and keeping the pipe.
Nitrogen flushing brazing
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Use Nitrogen gas when brazing the pipes as shown in the picture.
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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.
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Adjust the flow rate of the Nitrogen flushing with a pressure regulator to maintain 0.05 m
3
/h or less.
Brazing part
Nitrogen gas
ø6.35(1/4") copper pipe
Shut-off valve
Taping
Flow meter
High pressure hose
Pressure regulator
