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CAUTION
8.2 how to braze?
● Do not allow anything other than the designated refrigerant to get mixed into the freezing cycle, such
as air, etc. If any refrigerant gas leaks while working on the unit, ventilate the room thoroughly right away.
● In order to prevent dirt, liquid or dust from entering the piping, cure the piping with a pinch or taping.
Great caution is needed when passing copper tubes through walls.
● Only use the flare nuts included with the unit. Using different flare nuts may cause the refrigerant leakage
.
Ensure using a nitrogen blow when brazing. Brazing without carrying out nitrogen replacement or releasing
nitrogen into the piping will create large quantities of oxidized nitrogen into the piping, these would prevent normal
operation of valves and compressors. So, please braze tubes as followings:
Insert nitrogen into the tubing, and set the pressure to 0.02MPa with the reducing valve.
Chart
20
1 Refrigerant piping
2 Part to be brazed
3 taping
4 Handsvalve
5 Reducing valve
6 Nitrogen
Chart
19
8 refrIGerANT pIpING
