117
Tube size
Tightening torque (N.m)
Machined flare size A (mm)
Flare shape
Ø6.35
14.2~17.2
8.7~9.1
R0.4
A
90°
Ø9.52
32.7~39.9
12.8~13.2
Ø12.7
49.5~60.3
16.2~16.6
Ø15.88
61.8~75.4
19.3~19.7
Ø19.05
97.2~118.8
23.7—23.9
Ø22.22
117.2~138.8
28.2-28.5
<Table-3>
<Table-4>
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
Apply refrigerant oil
Fig.9
<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.9). 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.
Fig.10
Nitrogen cylinder
Refrigerant pipe
Nitrogen
Nitrogen
Weld
Binding
Summary of Contents for MRV 5-RC AB052MAERA
Page 1: ...MRV 5 RC Service Manual SYJS 03 2019REV A Edition 2019 03 ...
Page 3: ......
Page 55: ...52 AV08 10 12 14IMVURA 4 Center of gravity x X 347 9587 y 471 5454 z 725 6683 y z ...
Page 56: ...53 AV16 18 20 22IMVURA x X 650 5962 y 380 7255 z 706 5342 y z ...
Page 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 ...
Page 116: ...113 2 Preparation before installation ...
Page 162: ...159 One by one valve box PCB code 0151800186A 2 Valve box PCB photo and dip switch setting ...
Page 165: ...162 One by four valve box PCB code 0151800466 ...