Refrigerant Pipe Welding And Safety Information - Samsung DVM S ECO AM XMDG Series Installation Manual

Installation of Air-conditioner
AA
Refrigerant pipe brazing and safety information
Important information for refrigerant pipe work
• Make sure there is no moisture inside the pipe.
Caution
• Make sure there are no foreign substances and impurities in the pipe.
• Make sure there is no leakage.
• Make sure to follow the instruction when welding or storing the pipe.
Nitrogen flushing brazing
f X Use Nitrogen gas when brazing the pipes as shown in the picture.
f 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 and valves etc.
f X
Adjust the flow rate of the Nitrogen flushing with a pressure regulator to maintain 0.05m
Brazing part
Nitrogen gas
Pressure regulator
Direction of the pipe when brazing
f X Brazing the pipe shold be done with the pipe headed downward or horizontally.
f X
Avoid brazing with the pipe headed upward.
• The test liquid used to detect leakage after pipe brazing should be the designated one.The use of the test
liquid containing sulfur element may cause pipe corrosion.
Caution
22
Ø 6.35(1/4") copper pipe
Stop-off valve
Taping
Flow meter
High pressure hose
3
/h or less.