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2. Installation work
a. Brazing work
Brazing work needs replacing air inside pipe with nitrogen gas in order to prevent oxidation scale from occurring. This
is called nitrogen replacement, and one of very important work in brazing refrigerant piping. (Oxidation preventive is
not possible to use)
b. Prevention measure for refrigerant piping
Prevention measure for refrigerant piping is very important work to prevent water-dust-rubbish from getting in. All pip-
ing terminals needs sealing such as shown below.
• How to pinch
Close terminal part of piping with pliers and seal the gap with brazing.
• How to tape
Seal terminal part of piping with vinyl tape.
3. Vacuum pumping
The purpose of vacuum pumping work is to remove and dry air inside the piping or nitrogen at air tightness test.
Perform the work carefully.
Place
Period of work
Method of seal
Outside
More than 1 month
Pinch
Less than 1 month
Pinch or taping
Inside
Not specified
C
aution
Use the vacuum pump with the backflow prevention mechanism to prevent backflow of oil.
Vacuuming time
60 minutes or more
Vacuum pump capacity
60 l/min or more
Summary of Contents for CU-B14DBE5
Page 11: ...11 4 Dimensions 4 1 CS F18DTE5 ...
Page 12: ...12 4 2 CU J18DBE5 ...
Page 13: ...13 5 Refrigeration Cycle 5 1 CS F18DTE5 CU J18DBE5 ...
Page 14: ...14 6 Block Diagram 6 1 CS F18DTE5 6 2 CU J18DBE5 ...
Page 15: ...15 7 Wiring Diagram 7 1 CS F18DTE5 ...
Page 16: ...16 7 2 CU J18DBE5 ...
Page 18: ...18 8 2 Remote Control Display ...
Page 19: ...19 8 3 Remote Control Panel ...
Page 95: ...95 13 3 Reaching distance CS F18DTE5 Cooling ...
Page 96: ...96 13 4 Sound data ...
Page 97: ...97 13 5 Sound measuring point 13 5 1 Indoor Unit 13 5 2 Outdoor Unit ...
Page 100: ...100 14 Exploded View Indoor Unit 14 1 CS F18DTE5 ...
Page 101: ...101 14 2 CS F18DTE5 ...
Page 102: ...102 14 3 CS F18DTE5 ...
Page 105: ...105 16 Exploded View Outdoor Unit 16 1 CU J18DBE5 ...
Page 106: ...106 16 2 CU J18DBE5 ...
Page 108: ...108 18 Print Pattern 18 1 Indoor Unit Printed Main ...