Daikin RXJ20M2V1B Installation Manual

Also see for ARXM25M2V1B: Installation manual

Contents

Daikin RXJ20M2V1B Installation Manual Manual pdf 8 page image

6 EnglishOutdoor Unit Installation3. 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.4. Refrigerant piping workCAUTION• 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 R410A or R32.)• Use torque wrenches when tightening the flare nuts to prevent damage to the flare nuts and gas leakage.• After the piping work is finished (after checking for gas leaks), open the stop valves or the compressor might break down.• Align the centres of both flares and tighten the flare nuts 3 or 4 turns by hand. Then tighten them fully with the torquewrenches.AA(Cut exactly atright angles.) Remove burrs.Set exactly at the position shown below.FlaringDieCheckFlare’s inner surfacemust be flaw-free.The pipe end mustbe evenly flared ina perfect circle.Make sure that theflare nut is fitted.0-0.5mmClutch-typeFlare tool for R410A/R321.0-1.5mmClutch-type (Rigid-type)1.5-2.0mmWing-nut type (Imperial-type)Conventional flare toolTorque wrenchPiping unionFlare nutFlare nutSpannerFlare nut tightening torqueLiquid side1/4 inch14.2-17.2N • m(144-175kgf • cm)Gas side3/8 inch32.7-39.9N • m(333-407kgf • cm)Valve cap tightening torqueLiquid side1/4 inch21.6-27.4N • m(220-280kgf • cm)Gas side3/8 inch21.6-27.4N • m(220-280kgf • cm)Service port cap tightening torque10.8-14.7N • m (110-150kgf • cm)Do not apply refrigerationoil to the outer surface.Apply refrigeration oil tothe inner surface of theflare.Do not apply refrigeration oil tothe flare nut to avoid tighteningwith excessive torque.[Apply oil][Tighten]