Precautions for New Refrigerant (R-410A) SiUS39-602248 Precautions for New Refrigerant (R-410A)1.2 Service ToolsR-410A is used under higher working pressure, compared to previous refrigerants (R-22,R-407C).Furthermore, the refrigerating machine oil has been changed from Suniso oil to Ether oil, and if oilmixing is occurred, sludge results in the refrigerants and causes other problems. Therefore, gaugemanifolds and charge hoses that are used with a previous refrigerant (R-22,R-407C) can not beused for products that use new refrigerants.Be sure to use dedicated tools and devices. Tool compatibilityAs for the charge mouthpiece and packing, 1/2UNF20 is necessary for mouthpiece size ofcharge hose. Copper tube material and thickness* O: Soft (Annealed)H: Hard (Drawn)ToolCompatibilityReasons for changeHFC HCFCR-410A R-407C R-22Gauge manifoldCharge hose ✕2Do not use the same tools for R-22and R-410A.2Thread specification differs forR-410A and R-407C.Gas detector { ✕ 2The same tool can be used for HFCs.Vacuum pump(pump with reverse flowpreventive function) {2To use existing pump for HFCs,vacuum pump adaptor must beinstalled.Weighting instrument {Flaring tool (Clutch type) { 2For R-410A, flare gauge is necessary.Torque wrench { 2Torque-up for 1/2 and 5/8Pipe cutter {Pipe expander {Pipe bender {Pipe assembling oil ✕ 2Due to refrigerating machine oilchange. (No Suniso oil can be used.)Refrigerant recoverydevice Check your recovery device.Refrigerant piping See the chart below. 2Only φ19.1 is changed to 1/2H materialwhile the previous material is "O".Pipe sizeφ6.4φ9.5φ12.7φ15.9φ19.1φ22.2φ25.4φ28.6φ31.8φ38.1φ44.5MaterialOOOOO1/2H1/2H1/2H1/2H1/2H1/2HMaterialOOOO1/2H1/2H1/2H1/2H1/2H1/2H1/2HThickness[mm]0.80.80.81.01.01.01.01.01.21.41.6Thickness[mm]0.80.80.81.01.01.01.01.01.11.41.6R-407C R-410A
