Daikin 2MXS52E2V1B Installation Manual

Also see for 2AMX52E2V1B: Installation manual

Contents

Daikin 2MXS52E2V1B Installation Manual Manual pdf 10 page image

■English 85. Refilling the refrigerantCheck 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.)2) Be sure to use the R410A tools to ensure pressure and to prevent foreign objects entering.6. Charging with refrigerant1) If the total length of piping for all rooms exceeds the figure listed below, additionally charge with 20g of refrigerant (R410A)for each additional meter of piping.■ For cooling only• Cooling only models (3MKS50, 4MKS58) are chargeless. There is no need to charge with refrigerant.CAUTIONEven though the shut-off valve is fully closed, the refrigerant may slowly leak out; do not leave the flare nut removed for a longperiod of time.7. Refrigerant piping workCautions 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. (Bending radius should be 30 to 40mm or larger.)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 (0.035 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 insulation dimen-sions as below.3) Use separate thermal insulation pipes for gas and liquid refrigerant pipes.Outdoor capacity class 2MXS52, 2AMX52, 3MXS52, 3AMX52Total length of piping for all rooms 30mPipe size Pipe insulationO.D.: 6.4mm / Thickness: 0.8mmO.D.: 9.5mm, 12.7mm / Thickness: 0.8mmO.D.: 15.9mm / Thickness: 1.0mmI.D.: 8–10mm / Thickness: 10mm min.I.D.: 12–15mm / Thickness: 13mm min.I.D.: 16–20mm / Thickness: 13mm min.Filling a cylinder with an attached siphonStand the cylinder upright when filling.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