Daikin RX20JV1B Installation Manual

Also see for RX20JV1B: Service manual Service manual

Contents

Daikin RX20JV1B Installation Manual Manual pdf 9 page image

7 nEnglishOutdoor 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.NOTENational implementation of EU regulation on certain fluorinated greenhouse gases may require to provide the appropriate officialnational language on the unit. Therefor an additional multilingual fluorinated greenhouse gases label is supplied with the unit.Sticking instructions are illustrated on the backside of that label.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.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 Liquid side Gas pipethermal insulationLiquid pipethermal insulationO.D. 9.5mm O.D. 6.4mm I.D. 12-15mm I.D. 8-10mmMinimum bend radius Thickness 10mm Min.30mm or moreThickness 0.8mm (C1220T-O)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.356214Please fill in with indelible ink,1 the factory refrigerant charge of the product,2 the additional refrigerant amount charged in the field and1 + 2 the total refrigerant chargeon the refrigerant charge label supplied with the product.Important information regarding the refrigerant usedThis product contains fluorinated greenhouse gases covered bythe Kyoto Protocol. Do not vent gases into the atmosphere.Refrigerant type: R410AGWP(1) value: 1975 (1) GWP = global warming potential1 factory refrigerant charge of theproduct:see unit name plate2 additional refrigerant amountcharged in the field3 total refrigerant charge4 Contains fluorinated greenhousegases covered by the KyotoProtocol5 outdoor unit6 refrigerant cylinder and manifoldfor chargingThe filled out label must be adhered in theproximity of the product charging port (e.g.onto the inside of the stop valve cover).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