Daikin FXFQ24TVJU Installation Manual

Also see for FXFQ07TVJU: Operation manual

Contents

Daikin FXFQ24TVJU Installation Manual Manual pdf 11 page image

83P161684-7N EnglishJoint insulatingmaterial (9)(accessory)Piping holding plate screw(2 points)Gas pipingLiquid pipingLiquid side piping insulating methodIndoor unitIndoor unitClamp (4)(accessory)Sealing material(11) Medium-1(accessory)Sealing material(12) Medium-2(accessory)Clamp (4)(accessory)Pipinginsulatingmaterial(field supply)Gas side piping insulating methodJoint insulatingmaterial (8)(accessory)Piping insulatingmaterial (main unit)Bring theseamto the top.Flare nutconnectionPipinginsulatingmaterial(field supply)Do not leaveclearance.Flare nutconnectionBring theseamto the top.Do not leaveclearance.Piping insulatingmaterial (main unit)Wind around thepiping until top of theflare nut connection,beginning at the base.Wind around thepiping, beginningat the base.Do not expose thepiping in order toprevent the vaporcondensation.Tighten the portionwhere overlapped bythe piping insulatingmaterial.Tighten the portionwhere overlapped bythe piping insulatingmaterial.Do not expose thepiping in order toprevent the vaporcondensation.Fig. 12• Before brazing refrigerant piping, have nitrogen flowthrough the refrigerant piping and substitute air withnitrogen (NOTE 1) (Refer to Fig. 13). Then, carry outbrazing (NOTE 2).After all the brazing works are finished, carry out flareconnection with the indoor unit. (Refer to Fig. 12)Pressure reducing valveNitrogenTapingStop valveBrazing placeNitrogenRefrigerant pipingFig. 13NOTE1. The proper pressure for having nitrogen flow through thepiping is approximately 2.9 psi (0.02 MPa), a pressurethat makes one feel like breeze and can be obtainedthrough a pressure reducing valve.2. Do not use flux when brazing refrigerant piping.Use phosphor copper brazing filler metal (BCuP-2: JIS Z3264/B-Cu93P-710/795: ISO 3677) that does not requireflux.(If chlorinated flux is used, the piping will be corrodedand, in addition if fluorine is contained, the refrigerantoil will be deteriorated and the refrigerant circuit will beaffected badly.)3. When carrying out leakage test of refrigerant pipingand the indoor unit after the installation of indoor unit isfinished, confirm the connecting outdoor unit installationmanual for test pressure.Refer to the outdoor unit installation manual or technicaldocument for refrigerant piping.4. In case of refrigerant shortage due to forgetting addi-tional refrigerant charge etc., it will result in malfunctionssuch as not cooling or heating.Refer to the outdoor unit installation manual or technicaldocument for refrigerant piping.CAUTIONDo not use antioxidant when brazing piping.It may result in malfunction of components and clogging ofpiping due to residue.6. DRAIN PIPING WORK(1) Carry out drain piping.Carry out drain piping so that drainage can ensured.• Select the piping diameter equal to or larger than (ex-cept for riser) that of the connection piping (PVC pipepiping, nominal diameter 1 in. (25 mm), outside diam-eter 1-1/4 in. (32 mm)).• Install the drain piping as short as possible with down-ward inclination of 1/100 or more where air cannnotstagnate. (Refer to Fig. 14) Bubbling sound mayoccur.