Daikin FDMQ09RVJU Installation Manual

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Contents

Daikin FDMQ09RVJU Installation Manual Manual pdf 8 page image

CAUTION• Install the indoor unit leveled.If the indoor unit is inclined and the drain piping side getshigh, it may cause malfunction of float switch and result inwater leakage.• Attach nuts on the upper and lower side of hanger.If there is no upper nut and the lower nut is over-tightened,the hanger and the top plate will deform and cause abnormalsound.• Do not insert materials other than that specified intothe clearance between the hanger and the washer forhanger bracket (11).Unless the washers are properly attached, thesuspension bolts may come off from the hanger.WARNINGThe indoor unit must be securely installed on a placethat can withstand the mass.If the strength is insufficient, the indoor unit may fall downand cause injuries.6. REFRIGERANT PIPING WORKRefer to the installation manual for the outdoor unit also.• Carry out insulation of both gas and liquid refrigerant pipingsecurely. If not insulated, it may cause water leakage. Forgas piping, use insulation material of which heat resistanttemperature is not less than 230°F (110°C).For use under high humidity, strengthen the insulationmaterial for refrigerant piping. If not strengthened, thesurface of insulation material may sweat.(1) Flaring the pipe end1. Cut the pipe end with a pipe cutter.2. Remove burrs with the cut surface facing downward,so that the filings do not enter the pipe.3. Put the flare nut on the pipe.4. Flare the pipe.5. Check that the flaring has been done correctly.The flare’s inner surfacemust be flaw-free.The pipe end mustbe evenly flared in aperfect circle.Make sure that theflare nut is fitted.CheckACut exactly at right angles. Remove burrsSet exactly at the position shown below.A 0-0.02in(0-0.5mm)0.04-0.06in(1.0-1.5mm)0.06-0.08in(1.5-2.0mm)Clutch-typeFlare tool for R410AClutch-type(Rigid-type)Wing-nut type(Imperial-type)Conventional flare toolFlaringDieWARNING• Do not apply mineral oil to the flare.• Prevent mineral oil from getting into the system asthis would reduce the service life of the units.• Never use piping which has been used for previousinstallations. Only use parts which are delivered with this unit.• Never install a dryer to this R410A unit in order toguarantee its service life.• The drying material may dissolve and damage the system.• Incomplete flaring may result in refrigerant gas leakage.CAUTION• Use the flare nut fixed to the main unit. (This is toprevent the flare nut from cracking as a result ofdeterioration over time.)• Use a pipe cutter and flare suitable for the type ofrefrigerant.• To prevent gas leakage, apply refrigeration oil only tothe inner surface of the flare. (Use refrigeration oil forR410A.) (Refer to Fig. 10)• Use a torque wrench when tightening the flare nuts toprevent damage to the flare nuts and gas leakage.• Protect the open end of the pipe against dust and moisture.• Do not allow anything other than the designatedrefrigerant to get mixed into the refrigerant circuit, suchas air, etc. If any refrigerant gas leaks while working onthe unit, ventilate the room thoroughly right away.• Use only the flare nuts attached to the air conditioner. Ifother flare nuts are used, it may cause refrigerant leakage.(2) Refrigerant piping1. To prevent gas leakage, apply refrigeration machineoil only to the inner surface of the flare. (Userefrigeration oil for R410A)2. Align the centers of both flares and tighten the flarenuts 3 or 4 turns by hand, then tighten them fully witha spanner and a torque wrench.• Use a torque wrench when tightening the flare nutsto prevent damage to the flare nuts and gas leakage.(Refer to Fig. 9)Flare nut tightening torqueGas side Liquid side3/8 inch(9.5mm)1/2 inch(12.7mm)5/8 inch(15.9mm)1/4 inch(6.4mm)24.1-29.4ft•lbf(32.7-39.9N•m)36.5-44.5ft•lbf(49.5-60.3N•m)45.6-55.6ft•lbf(61.8-75.4N•m)10.4-12.7ft•lbf(14.2-17.2N•m)7 English