Daikin FXFQ25SVM Installation Manual

Also see for FXFQ100SVM: Operation manual

Contents

Daikin FXFQ25SVM Installation Manual Manual pdf 9 page image

Joint 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 with nitro-gen (NOTE 1) (Refer to Fig. 13). Then, carry out brazing(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 0.02 MPa, a pressure that makesone feel like breeze and can be obtained through a pres-sure 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 corroded and,in addition if fluorine is contained, the refrigerant oil willbe deteriorated and the refrigerant circuit will be affectedbadly.)3. When carrying out leakage test of refrigerant piping andthe indoor unit after the installation of indoor unit is fin-ished, confirm the connecting outdoor unit installationmanual for test pressure.Refer to also the outdoor unit installation manual or techni-cal document for refrigerant piping.4. In case of refrigerant shortage due to forgetting additionalrefrigerant charge etc., it will result in malfunction such asdoes not cool or does not heat.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.7. 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(except for riser) that of the connection piping (polyvi-nyl chloride piping, nominal diameter 25 mm, outsidediameter 32 mm).• Install the drain piping as short as possible with down-ward inclination of 1/100 or more and without where airmay stagnate. (Refer to Fig. 14) (It may cause abnormalsound such as bubbling noise.)3P335596-2D English 8