ESIE15-08B | Part 3. Repair 1. General Repair proceduresPage 108 19/07/16Daikin Altherma Monobloc CA1.2. Pipe work procedures• Make sure to cover open pipe ends during work so no dust or moisture can enter.• Make sure to re-apply insulation removed during repair.• Pipe expansion / flare making:- Remove any burrs on the cut surface and use correct tool such as reamer or scraper (note that excessive deburring canthin the pipe walls and cause cracking of the pipe).- Make sure the flare has the correct size (use a flare gauge).- Make sure no particles remain in the piping.- Apply refrigerant oil on the inner surface of the flare.- Make sure the flare connection is tightened with the correct torque (torque values refer to installation manual).• Brazing:- Use correct brazing tool.- Use a phosphor copper filler metal (silver composition of 0 to 2%). Do not use flux material.- Use nitrogen replacement in order to prevent oxide film from forming (nitrogen purity ≥ 99,99%).- Do not stop the nitrogen gas until the refrigerant piping has completely cooled down.
