Daikin FDXS09DVJU Installation Manual

Also see for FDXS12DVJU: Operation manual Service manual Service manual Service manual

Contents

Daikin FDXS09DVJU Installation Manual Manual pdf 9 page image

8REFRIGERANT PIPING WORKCautionBe sure to insulate any field piping all the way to the piping connection inside the unit. Any exposed piping may causecondensation or burns if touched.Cautions on Pipe Handling• Protect the open end of the pipe against dust and moisture.(Tighten both edges with clamp.)• All pipe bends should be as gentle as possible. Use a pipe bender for bending.(Bending radius should be 1-1/4in or larger.)Selection of Copper and Heat Insulation materialsWhen using commercial copper pipes and fittings, observe the following:• Insulation material: Polyethylene foamHeat transfer rate: 0.024 to 0.030Btu/hft°FRefrigerant gas pipe’s surface temperature reaches 230°F max.Choose heat insulation materials that will withstand this temperature.• Be sure to insulate both the gas and liquid piping and to provide insulation dimensions as below.Also, when subject to high humidity, heat insulation of the refrigerant piping(the unit piping and branch piping) must be further reinforced.Reinforce the insulation when installing the unit near bathrooms, kitchens, andother similar locations.Refer to the following:• 86°F, more than 75% RH: 13/16in Min. in thicknessIf the insulation is not sufficient, condensation may form on the surface of theinsulation.• Use separate thermal insulation pipes for gas and liquid refrigerant pipes.DRAIN PIPING WORKCautionMake sure all water is out before making the duct connection. Install the drain piping.• Make sure the drain works properly.• The diameter of the drain pipe should be greater than or equal to the diameter ofthe connecting pipe (vinyl tube; pipe size: 25/32in; outer dimension: 1-1/32in).• Keep the drain pipe short and sloping downwards at a gradient of at least1/100 to prevent air pockets from forming.WallIf no flare cap isavailable, coverthe flare mouthwith tape to keepdirt or water out.Be sure toplace a cap.RainGas side Gas pipe thermal insulationLiquid side Liquid pipe thermal insulationO.D. 3/8in I.D. 1/2 to 5/8inO.D. 1/4in I.D. 3/8inGas pipe Liquid pipeGas pipeinsulation Liquid pipeinsulationFinishing tape Drain hoseDrain pipe connection holeRefrigerant piprsConnect the drain pipe afterremoving the rubber cap andinsulation tubing attached tothe connection hole.