Si39-303
Installation Manual
177
!
After all the piping has been connected, use nitrogen to perform a gas leak check.
Not recommendable but in case of emergency
You must use a torque wrench but if you are obliged to install the unit without a torque wrench,
you may follow the installation method mentioned below.
After the work is finished, make sure to check that there is no gas leak.
When you keep on tightening the flare nut with a spanner, there is a point where the tightening
torque suddenly increases. From that position, further tighten the flare nut the angle shown
below:
Disposal requirements
Dismantling of the unit, treatment of the refrigerant, oil and eventual other parts, should be done
in accordance with the relevant local and national regulations.
6.5
Pipe Insulation
After finishing the leak test and vacuum drying, the piping must be insulated. Take into account
the following points:
!
Make sure to insulate the connection piping and refrigerant branch kits entirely.
!
Be sure to insulate the liquid-side and gas-side piping for the inter-unit piping and the
refrigerant branch kits and always use Q18-type or better insulation for the oil pressure
equalizer.
!
Not insulating them may cause leaking. (The gas piping can reach temperatures of 120°C.
Be sure the insulation used can withstand such temperatures.)
!
If you think the humidity around the cooling piping might exceed 30°C and RH80%, reinforce
the insulation on the cooling piping (at least 20mm thick). Condensation might form on the
surface of the insulation.
!
If there is a possibility that condensation on the shut-off valve might drip down into the indoor
unit through gaps in the insulation and piping because the outdoor unit is located higher than
the indoor unit, etc., this must be prevented by corking the connections, etc.
1. One outdoor unit installed
2. Liquid line shutoff valve
3. Gas line shutoff valve
4. Outer-to-inner interconnecting piping
5. Calking treatment, etc.
6. Heat insulator
7. Oil-equalizing line shutoff valve
8. When multiple outdoor units installed
Caution
Be sure to insulate local pipes, as touching them can cause burns.
pipe size
tightening
torque (Ncm)
A (mm)
flare shape
φ
9.5
3270 - 3990
12.8 - 13.2
φ
12.7
4950 - 6030
16.2 - 16.6
φ
15.9
6180 - 7540
19.3 - 19.7
Pipe size
Further tightening angle
Recommended arm length of tool
9.5 (3/8”)
60 to 90 degrees
Approx. 200 mm
12.7 (1/2”)
30 to 60 degrees
Approx. 250 mm
19.1 (5/8”)
30 to 60 degrees
Approx. 300 mm
R=0.4~0.8
45 ±2
90 ±2
A
2
7
6
6
5
5
4
4
2
3
3
One outdoor unit installed
(1) RXYQ5-16MY1B
When multiple outdoor units installed
(8) RXYQ18-48MY1B
Summary of Contents for VRV II Series
Page 6: ...Si39 303 iv Table of Contents...
Page 31: ...Si39 303 Installation General Information 25 Flaring Procedure...
Page 124: ...Appendix Si39 303 118 General Information 3P114237A...
Page 141: ...Si39 303 Appendix General Information 135 RXYQ8MY1B RXYQ10MY1B RXYQ12MY1B 4D040338A...
Page 142: ...Appendix Si39 303 136 General Information RXYQ14MY1B RXYQ16MY1B 4D040339A...
Page 144: ...Appendix Si39 303 138 General Information 7 11 Wiring Diagrams 7 11 1 Outdoor Unit RXYQ5MY1B...
Page 145: ...Si39 303 Appendix General Information 139 RXYQ8MY1B RXYQ10MY1B RXYQ12MY1B 3D038582...
Page 146: ...Appendix Si39 303 140 General Information RXYQ14MY1B RXYQ16MY1B 3D038058...
Page 147: ...Si39 303 Appendix General Information 141 7 11 2 Field Wiring RXYQ5 16MY1B 3D040746...
Page 148: ...Appendix Si39 303 142 General Information RXYQ18 32MY1B 3D040747...
Page 149: ...Si39 303 Appendix General Information 143 RXYQ34 48MY1B 3D040748...
Page 158: ...Appendix Si39 303 152 General Information...
Page 180: ...Refrigerant Piping Si39 303 174 Installation Manual...
Page 226: ...Troubleshooting Si39 303 220 Operation Manual...