Daikin CTXM15M2V1B Installation Manual

Also see for ATXM20M2V1B: Operation manual

Contents

Daikin CTXM15M2V1B Installation Manual Manual pdf 15 page image

12 EnglishRefrigerant Piping Work1. Flaring the pipe end1) Cut the pipe end with a pipe cutter.2) Remove burrs with the cut surface facingdownward so that the chips do not enter the pipe.3) Put the flare nut on the pipe.4) Flare the pipe.5) Check that the flaring is properly made.WARNING• Do not use mineral oil on flared part.• Prevent mineral oil from getting into the system as this would reduce the lifetime of the units.• Never use piping which has been used for previous installations. Only use parts which are delivered with the unit.• Never install a dryer to this R32 unit in order to guarantee its lifetime.• The drying material may dissolve and damage the system.• Incomplete flaring may cause refrigerant gas leakage.2. Refrigerant pipingCAUTION• Use the flare nut fixed to the main unit. (To prevent cracking of the flare nut by aged deterioration.)• To prevent gas leakage, apply refrigeration oil only to the inner surface of the flare. (Use refrigeration oil for R32)• Use torque wrenches when tightening the flare nuts to prevent damage to the flare nuts and gas leakage.Align the centres of both flares and tighten the flare nuts 3 or 4 turns by hand. Then tighten them fully with the torque wrenches.2-1. Caution on piping 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 benderfor bending.AA(Cut exactly atright angles.) Remove burrs.FlaringSet exactly at the position shown below.Die 0-0.5mmClutch-typeFlare tool forR321.0-1.5mmClutch-type(Rigid-type)1.5-2.0mmWing-nut type(Imperial-type)Conventional flare toolFlare’s inner surfacemust be flaw-free.The pipe end mustbe evenly flared in aperfect circle.Make sure that theflare nut is fitted.CheckDo not apply refrigerationoil to the outer surface.Flare nutApply refrigeration oil tothe inner surface of theflare.Do not apply refrigeration oil tothe flare nut to avoid tighteningwith excessive torque.[Apply oil]Piping unionFlare nutSpanner[Tighten]1/4 inch3/8 inch 1/2 inch 5/8 inch15, 20, 25, 35 class 42, 50, 60 class 71 classTorque wrenchFlare nut tightening torqueGas side32.7-39.9N • m(330-407kgf • cm)49.5-60.3N • m(505-615kgf • cm)61.8-75.4N • m(630-770kgf • cm)14.2-17.2N • m(144-175kgf • cm)Liquid sideWallIf no flare cap isavailable, cover theflare mouth withtape to keep dirtor water out.Be sure toplace a cap.Rain

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