Daikin RXS09LVJU Installation Manual

Also see for RXS09LVJU: Engineering data Service manual Service Manual Removal Procedure

Contents

Daikin RXS09LVJU Installation Manual Manual pdf 9 page image

8 ■EnglishOutdoor Unit Installation6. Refilling the refrigerantCheck the type of refrigerant to be used on the machine nameplate.Precautions when adding R410AFill from the gas 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.)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.• Be sure to use the R410A tools to ensure pressure and to prevent foreign objects entering.7. Refrigerant piping work7-1 Caution on pipe handling1) Protect the open end of the pipe against dust and moisture.2) All pipe bends should be as gentle as possible. Use a pipe bender forbending.7-2 Selection of copper and heat insulation materialsWhen using commercial copper pipes and fittings, observe the following:1) Insulation material: Polyethylene foamHeat transfer rate: 0.041 to 0.052W/mK (0.024 to 0.030Btu/fth°F (0.035 to 0.045kcal/mh°C))Be sure to use insulation that is designed for use with HVAC Systems.2) Be sure to insulate both the gas and liquid piping and to provide insulationdimensions as below.Gas side Liquid side Gas pipe thermalinsulationLiquid pipe thermalinsulationO.D. 3/8 inch(9.5mm)O.D. 1/4 inch(6.4mm)I.D. 15/32-19/32 inch(12-15mm)I.D. 5/16-13/32 inch(8-10mm)Minimum bend radius Thickness 13/32 inch (10mm) Min.1-3/16 inch (30mm) or moreThickness 0.031 inch (0.8mm) (C1220T-O)• Use separate thermal insulation pipes for gas and liquid refrigerant pipes.WallIf no flare cap isavailable, cover theflare mouth withtape to keep dirt orwater out.Be sure toplace a cap.RainGas pipe Liquid pipeGas pipeinsulationLiquid pipeinsulationFinishing tape Drain hoseInter-unit wire