Daikin FUY71FJV1 Installation Manual

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Daikin FUY71FJV1 Installation Manual Manual pdf 12 page image

9 EnglishCAUTIONFor local insulation, be sure to insulate all the way to thepipe connections inside the machine.Exposed piping may cause leaking or burns on contact.6-2 For upward and rightward running pipes• Upward and rightward running pipes are easily rigged withthe optional connecting elbow kit.• For upward running pipes, detach the pipe hole cover.• Once pipes are rigged, cut the pipe hole cover to size andreattach. Use scissors for cutting.(Refer to Fig. 24)Since there exists a possibility that small animals and insectsmight get inside the indoor unit, attach the wiring throughcovers and make sure there are no gaps in the through holesby applying putty or insulation (procured locally.)• When doing this, block any gaps between the piping penetra-tion lid and the pipes using putty to prevent dust from enter-ing the indoor unit.CAUTIONCAUTION TO BE TAKEN WHEN BRAZING REFRIGER-ANT PIPING“Do not use flux when brazing refrigerant piping. Therefore,use the phosphor copper brazing filler metal (BCuP-2: JIS Z3264/B-Cu93P-710/795: ISO 3677) which does not requireflux.”(Flux has extremely harmful influence on refrigerant pipingsystems. For instance, if the chlorine based flux is used, itwill cause pipe corrosion or, in particular, if the flux containsfluorine, it will damage the refrigerant oil.)• Before brazing local refrigerant piping, nitrogen gas shall beblown through the piping to expel air from the piping.If you brazing is done without nitrogen gas blowing, a largeamount of oxide film develops inside the piping, and couldcause system malfunction.• When brazing the refrigerant piping, only begin brazing afterhaving carried out nitrogen substitution or while insertingnitrogen into the refrigerant piping. Once this is done, con-nect the indoor unit with a flared or a flanged connection.• Nitrogen should be set to 0.02MPa with a pressure-reducingvalve if brazing while inserting nitrogen into the piping.(Refer to Fig. 25)Fig. 257. DRAIN PIPING WORK7-1 Rig drain piping (Refer to Fig. 26)As for drain work, perform piping in such a manner thatwater can be drained properly.As for drain piping, the connection can be made from threedifferent directions.• Employ a pipe with either the same diameter or with thediameter larger (excluding the raising section) than thatof the connecting pipe (PVC pipe, nominal diameter20mm, outside diameter 26mm).• Keep the drain pipe short and sloping downwards at agradient of at least 1/100 to prevent air pockets fromforming. (Refer to Fig. 27)CAUTIONWater pooling in the drainage piping can cause the drain toclog.• To keep the drain hose from sagging, space hanging wiringevery 1 to 1.5m. (Refer to Fig. 26)• Use only the included drain hose (1), (for rightward runningdrain hose) or elbow (9) (for upward running drain hose) andclamp (2).• Fit the drain hose (1) or elbow (9) over the drain piping up tothe neck and fasten tight with the clamp (2).• Tighten the clamp (2) until the screw head is less than 4mmfrom the hose.• Insulate the clamp (2) and drain hose or elbow (9) with theincluded sealing pad (8). (Refer to Fig. 28)• Make sure that heat insulation work is executed on the fol-lowing 2 spots to prevent any possible water leakage due todew condensation.• Insulate the drain hose inside the building• Drain socketPipe hole cover For liquid pipeFor gas pipeFor wiringFig. 24For drain pipeNitrogenPressure-reducing valveHands valveTapingRefrigerant piping Part to bebrazedNitrogen1 - 1.5 mVP20VP20Drain hose(Procure in field.) Drain hose (1) (For VP20 connection)≤500Clamp (2)Notes on upward running drain hoseFig. 26Ceiling slabHangerbracketElbow (9)Sealing pad (8)Min. 1/100 gradientRear running pipeGOODWRONGFig. 27Right running drain hose