141
<Note>
• Excessive tightening will result in cracking at the flare and refrigerant leakage.
• To weld the refrigerant pipe, please make nitrogen replacement (*1), or send nitrogen (*2) into the refrigerant pipe
while welding the pipe (refer to Fig.10). Finally use the flare or flange to connect the indoor unit and valve box.
(*1) Nitrogen replacement method is provided in the multi-split system work manual.
(*2) If nitrogen flowing and welding proceed simultaneously, do use pressure reducing valve. Approximately 0.02
MPa (0.2 Kg/cm with a slight feeling of breeze) pressure is quite proper.
Apply refrigerant oil
Fig.8
Fig.10
Nitrogen cylinder
Refrigerant pipe
Nitrogen
Nitrogen
Weld
Binding
<Note>
• For pipe welding, do not use antioxidant, for its residue may cause tube blocking and component fault.
• For pipe welding, do not use flux. If the flux is chlorine product, it will corrode the tube; if it contains fluorine, it will
even cause detrimental effects to the refrigerant system, such as refrigerant oil deterioration. Please do not use
phosphor copper for welding material (BCup-2).
<Table-2>
Pipe size
Tightening angle
Recommended tool length (mm)
Ø6.35
60°~90°
150
Ø9.52
60°~90°
200
Ø12.7
30°~60°
250
Ø15.88
30°~60°
300
Ø19.05
20°~35°
450
Ø22.22
15°~30°
600
Fig.9
Ø19.05 pipe connected on site
Welding
Accessory pipe
Valve box
Ø19.05 pipe connected on site
Welding
Valve box
Содержание MRV 5-RC AB052MAERA
Страница 1: ...MRV 5 RC Service Manual SYJS 03 2019REV A Edition 2019 03 ...
Страница 3: ......
Страница 55: ...52 AV08 10 12 14IMVURA 4 Center of gravity x X 347 9587 y 471 5454 z 725 6683 y z ...
Страница 56: ...53 AV16 18 20 22IMVURA x X 650 5962 y 380 7255 z 706 5342 y z ...
Страница 106: ...103 2 Dimension 4 19 200 60 25 25 25 249 108 232 84 69 388 73 82 65 103 177 4 44 4 35 277 ...
Страница 116: ...113 2 Preparation before installation ...
Страница 130: ...127 2 Dimension 290 67 410 220 567 137 160 189 57 144 109 159 159 212 393 4 22 65 65 65 65 65 44 65 76 4 52 67 156 830 ...
Страница 162: ...159 One by one valve box PCB code 0151800186A 2 Valve box PCB photo and dip switch setting ...
Страница 165: ...162 One by four valve box PCB code 0151800466 ...