Refrigerant Piping Work
Si39-406
182
Installation Manual BS Unit
For locally procured insulation, be sure to insulate all the way to the pipe connections inside the
machine.
Exposed piping may cause condensation to form or burns on contact.
Use the following material specification for refrigerant piping:
(1) construction material: Phosphoric acid deoxidized seamless copper for refrigerant.
(2) size: Determine the proper size referring to chapter “SELECTION OF PIPE CONNECTION
SIZE”
(3) The wall thickness of the refrigerant piping should comply with relevant local and national
regulatoins.
Ventilate if refrigerant gas leaks while performing work.
Finally make sure there is no refrigerant gas leak. A toxic gas may be released by the refrigerant
gas leaking indoor and being exposed to flames from an area heater, cooking stove, etc.
Table 1
Table 2
Pipe gauge
(in)
Tightening torque (ft-lbf)
Flare dimension
A (in)
Flare shape (in)
1/4’’
10.5 – 12.7
0.343 – 0.358
3/8’’
24.1 – 29.4
0.504 – 0.520
1/2’’
36.5 – 44.5
0.638 – 0.654
5/8’’
45.6 – 55.6
0.760 – 0.776
Pipe size
(in)
Further tightening angle (degree)
Recommended arm length of tool (in)
1/4’’
60 to 90
Approx. 5 7/8’’
3/8’’
60 to 90
Approx. 7 7/8’’
1/2’’
30 to 60
Approx. 9 13/16’’
5/8’’
30 to 60
Approx. 11 13/16’’
Spanner
Piping union
Torque wrench
Flare nut
Fig. 2
Coat here with ether oil or ester oil.
Fig. 3
Insulation
(locally procured)
Wrap around top
of flare nut
Clamp 2)
Insulation for fitting
(Attached) 3)-1
Insulatoin for fitting
(Attached) 3)-3
(For liquid pipe)
(For gas pipe)
Gas piping
Liquid piping
Fig. 4
Part to be
brazed
Taping
Pressure-reducing valve
Nitrogen
Valve
Refrigerant piping
Nitrogen
Fig. 5
45
0
±
2
0
90
0
±
2
0
R 0.016~0.031
A
Summary of Contents for REYQ96MTJU
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Page 6: ...Si39 406 iv Table of Contents...
Page 34: ...Installation Si39 406 28 General Information Flaring Procedure...
Page 68: ...Installation Si39 406 62 General Information Caution Caution label 3P124617 4P124614...
Page 114: ...Appendix Si39 406 108 General Information 3P135887 1...
Page 126: ...Appendix Si39 406 120 General Information 7 8 3 BS Unit BSVQ36MVJ BSVQ60MVJ 4D045338...
Page 128: ...Appendix Si39 406 122 General Information 7 9 2 Field Wiring REYQ96MTJU 3D042647A...
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Page 230: ...Precautions for New Refrigerant R410A Si39 406 224 Precautions for New Refrigerant R410...
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