Daikin RXS20E2V1B Installation Manual

Also see for RKS20E2V1B: Installation manual

Contents

Daikin RXS20E2V1B Installation Manual Manual pdf 9 page image

7 ■EnglishOutdoor Unit Installation6. Refilling the refrigerant.Check the type of refrigerant to be used on the machine nameplate.Precautions when adding R410AFill from the liquid pipe in liquid form.It is a mixed refrigerant, so adding it in gas form may cause the refrigerant composition to change, preventing normal operation.1) Before filling, check whether the cylinder has a siphon attached or not. (It should have something like “liquid filling siphonattached” displayed on it.)• Be sure to use the R410A tools to ensure pressure and to prevent foreign objects entering.7. Refrigerant piping work.7-1 Cautions on pipe handling.1) Protect the open end of the pipe against dust and moisture.2) All pipe bends should be as gentle as possible. Use a pipe benderfor bending.(Bending radius should be 30 to 40mm or larger.)7-2 Selection of copper and heat insulation materials.When using commercial copper pipes and fittings, observe the following:1) Insulation material: Polyethylene foamHeat transfer rate: 0.041 to 0.052W/mK (0.035 to 0.045kcal/(mh •°C))Refrigerant gas pipe’s surface temperature reaches 110°C max.Choose heat insulation materials that will withstand this temperature.2) Be sure to insulate both the gas and liquid piping and to provide insulationdimensions as below.3) Use separate thermal insulation pipes for gas and liquid refrigerant pipes.Gas side LiquidsideGas pipethermal insulationLiquid pipethermal insulationO.D. 9.5mm O.D. 6.4mm I.D. 12-15mm I.D. 8-10mmThickness 0.8mm Thickness 10mm Min.Filling a cylinder with an attached siphonStand the cylinder upright whenfilling.There is a siphon pipe inside, so thecylinder need not be upside-down tofill with liquid.Filling other cylindersTurn the cylinder upside-downwhen filling.WallIf no flare cap isavailable, coverthe flare mouthwith tape to keepdirt or water out.Be sure toplace a cap.RainGas pipe Liquid pipeGas pipeinsulationLiquid pipeinsulationFinishing tape Drain hoseInter-unit wiring