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Refrigerant piping
Pipe brazing instructions and cautions
Keeping refrigerant pipe clean and dry
To prevent foreign materials or water from entering the pipe, it is important to keep the refrigerant pipe clean, dry and
sealed during installation.
Exposure place
Outside exposure
Inside exposure
Brazing the pipe
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 the pipe.
The use of Nitrogen gas
1. Use Nitrogen gas when brazing the pipes as shown in the picture.
2. If you don't use Nitrogen gas when brazing the pipes, oxide may form
inside the pipe. It can cause the damage of the compressor and valves.
3. Adjust the flow rate of the nitrogen gas with a pressure regulator to
maintain 0.05m3/h(1.77ft3/h) or less.
Direction of the pipe when brazing
• Performing the brazing of the pipe should be headed downwards or
horizontally.
Exposure time
Longer than one month
Shorter than one month
-
Brazing part
Sealing type
Pipe pinch
Taping
Taping
1/4" copper pipe
Nitrogen gas
Stop valve
Pressure regulator
Taping
Flowmeter
17
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