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Refrigerant Piping
Si39-303
172
Installation Manual
2. To avoid the risk of oil retention to the stopping unit side, always connect the shutoff valve
and the piping between outdoor units as shown in the figure A or figure B.
3. If the piping length between the outdoor unit-connecting pipe kits or between the outdoor
units exceeds 2 m, create a rise of 200 mm or more in the gas line within a length of 2 m
from the kit.
A
B
A
B
Prohibited pattern
to indoor unit
to indoor unit
Oil collects to the stopping outdoor unit.
Change to pattern 1 or pattern 2
Unit A
Unit B
Unit C
Unit C
Unit A
Unit B
to indoor unit
Change as shown in the figure below.
to indoor unit
to indoor unit
to indoor unit
Oil collects to the outdoor unit C when the system stops.
Rising height:
200 mm or more
to indoor
unit
If 2 m or less
If 2 m or more
Piping between outdoor units
Piping between
outdoor units
Piping between
outdoor units
to indoor unit
2m or less
2m or less
2m
or more
Rising height:
200 mm or more
Rising height:
200 mm or more
Rising height:
200 mm or more
2m or less
2m or less
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...