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Refrigerant piping work
Storing refrigerant pipe
To prevent foreign materials or water from entering the pipe, it is important to keep the refrigerant pipe sealed in clean and
dry condition during installation. Apply correct sealing method depending on the environment.
Stored place
Outside
Inside
Refrigerant pipe brazing and safety information
Important information for refrigerant pipe work
f Make sure that there is no moisture inside the pipe.
X
f Make sure that there are no foreign materials and impurities in the pipe.
X
f Make sure that there is no leak.
X
f Make sure to follow the instruction when brazing and keeping the pipe.
X
Nitrogen flushing brazing
f Use nitrogen gas when brazing the pipes as shown in the picture.
X
f If you do not perform nitrogen flushing when brazing the pipes, oxide may form inside the pipe. It can cause the damage
X
of the important parts such as compressor, valves.
f Adjust the flow rate of the nitrogen flushing with a pressure regulator to maintain 0.05m
X
f Wrap the bottom side of the service valve with a wet cloth and weld it as shown in the figure. Since water will evaporate
X
during welding, pour some water time to time. If not, O-ring and packing inside the service valve may get damaged by a
welding fire and cause critical leakage.
Brazing part
Nitrogen gas
Pressure
regulator
Nitrogen gas
Direction of the pipe when brazing
f Brazing the pipe should be done with the pipe headed downward or horizontally.
X
f Avoid brazing with the pipe headed upward.
X
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PAC_아프리카 중동향AP80S0A_IBIM_34514A-02_EN.indd 36
Stored time
Longer than one month
Shorter than one month
-
ø 6.35 (1/4") copper pipe
Stop valve
Taping
Flowmeter
High pressure
hose
Sealing type
Pipe pinch
Taping
Taping
/h or less.
3
Gas side
service valve
Wet towel
2015-04-23 오후 2:18:58
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