Maintenance Inspections
SiE25-110
104
Troubleshooting
1.2
Cautions in Handling New Refrigerant
The working pressure of the new refrigerant R-407C is rather high as compared to the
conventional refrigerants R-22, and the applicable refrigerant oil is different from one to R-22.
Therefore, some service work and tools for piping may not be allowed for use with the new
refrigerant.
Required tools
Special tools are required to carry out service work for the refrigerant circuit on units using the
new refrigerant. Select tools referring to the following table.
Compatibility of representative tools and devices used for piping work
Refrigerant
Previous refrigerant
New refrigerant
R-22 (Single refrigerant)
R-407C (Mixed refrigerant)
Refrigerating machine oil
Mineral oil (Suniso)
Synthetic oil (Ether oil)
Condensation pressure
1.84MPa (18.8kg/cm
2
)
2.01MPa (20.5kg/cm
2
)
Tool
Work process·Purpose
Compatibility with conventional tools
(used for R-22 refrigerant)
Pipe cutter
Refrigerant piping work
Pipe cutting
Compatible and can be used.
Flaring tool
Pipe flaring
Refrigerant oil
Applying on flare sections
Use special ether-base oil, ester-base oil,
alkylbenzene-base oil, or mixed oil of these oils.
Torque wrench
Jointing flare nuts
Compatible and can be used.
Expanding tool
(Expander)
Expanding in pipe connection
Pipe bender
Bending pipe
Nitrogen
Air tight test
Preventing oxidation inside pipes
Welder
Brazing pipes
Gauge manifold
From air tight test to
refrigerant additional
charging
Refrigerant charging with
vacuuming , and checking
equipment operation
Gauge manifold designed for the new refrigerant is
necessary since the pressure is high and cannot be
measured by conventional manifold.
Charge hose
Charge hose designed for the new refrigerant is
necessary since the refrigerant leaks and intrusion
of impurities can occur.
Vacuum pump
Vacuum drying
Compatible and can be used.
Pay utmost care for oil not to return into the unit
during pump stops operation.
Charging cylinder
Refrigerant additional
charging
Not required since a scale is used for refrigerant charging.
Scale for refrigerant charging
Compatible and can be used.
Gas leakage detector
Checking gas leakage
Detector designed for the new refrigerant is necessary.
(Detector for R134a can be used.)
(
)
Summary of Contents for SkyAir Super Inverter 70 D Series
Page 11: ...SiE25 110 2...
Page 15: ...Model Name and Power Supply SiE25 110 6 Model Name and Power Supply...
Page 16: ...SiE25 110 Functions 7 Part 2 Functions 1 List of Functions 8 1 1 Functions 8...
Page 31: ...Specifications SiE25 110 22 Specifications...
Page 35: ...Wired Remote Controller SiE25 110 26 Remote Controller 1 2 Installation...
Page 36: ...SiE25 110 Wired Remote Controller Remote Controller 27...
Page 39: ...Wireless Remote Controller SiE25 110 30 Remote Controller...
Page 63: ...Settings Concerning Maintenance SiE25 110 54 Field Setting FUYP...
Page 64: ...SiE25 110 Settings Concerning Maintenance Field Setting 55 FHYP...
Page 65: ...Settings Concerning Maintenance SiE25 110 56 Field Setting FAYP...
Page 67: ...Settings Concerning Maintenance SiE25 110 58 Field Setting RZP100 125DV1 E RZP100DVAL E...
Page 68: ...SiE25 110 Settings Concerning Maintenance Field Setting 59 RZP125 140DTAL...
Page 107: ...Operation Range SiE25 110 98 Function and Operation 5 Operation Range 5 1 Operation Limits...
Page 133: ...Procedure of Self Diagnosis by Remote Controller SiE25 110 124 Troubleshooting...
Page 238: ...SiE25 110 Piping Diagrams Appendix 229 1 2 Twin System RZP100D RZP125D 3D034162...
Page 241: ...Wiring Diagrams SiE25 110 232 Appendix FUYP71BV1 FUYP100BV1 FUYP125BV1 3D027747...
Page 242: ...SiE25 110 Wiring Diagrams Appendix 233 FAYP71BV1 FAYP100BV1 3D027748...
Page 243: ...Wiring Diagrams SiE25 110 234 Appendix 2 2 Outdoor Units 2 2 1 50Hz RZP71DV1 3D032604...
Page 244: ...SiE25 110 Wiring Diagrams Appendix 235 RZP100DV1 RZP125DV1 3D032603...
Page 245: ...Wiring Diagrams SiE25 110 236 Appendix 2 2 2 60Hz RZP71DVAL 3D032880B...
Page 246: ...SiE25 110 Wiring Diagrams Appendix 237 RZP100DVAL 3D032881B...
Page 247: ...Wiring Diagrams SiE25 110 238 Appendix RZP125DTAL RZP140DTAL 3D032882B...
Page 251: ...SiE25 110 iv Index...