Design of 3WAY VRF SYSTEM
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Precautions for brazing
Be sure to replace the air inside the tube with nitrogen to prevent
oxide film from forming during the brazing process. Be sure to use
a damp cloth or other means to cool the valve unit during brazing.
CAUTION
1. Be sure to use nitrogen. (Oxygen, CO
2
, and CFC must not be used.)
2. Use a pressure-reducing valve on the nitrogen tank.
3. Do not use agents intended to prevent the formation of oxide film.
They will adversely affect the refrigeration oil, and may cause equipment failure.
4. The balance tube is not used if only 1 outdoor unit is installed.
Use the unit in the same conditions as when it was shipped from the factory.
Work method
Pressure-reducing
valve (regulator)
Field-supply tube
Brazing locations
Taping
Nitrogen
Remote valve
01_280157_Eng.indd 28 2015-11-11 9:13:00
5. HOW TO INSTALL THE OUTDOOR UNIT
TD831183-00_北米向け3WAY.indb 38 15/12/17 16:05:19
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