Daikin FDMA125AV16 Installation Manual

-& 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.Unless the washers are properly attached, the hangingbolts may come off from the hanger.-& WARNING-----------The 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 WORK• For the outdoor unit refrigerant piping, refer to the installationmanual of the outdoor unit.• 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 120°c.For use under high humidity, strengthen the insulationmaterial for refrigerant piping. If not strengthened, thesurface of insulation material may sweat.• Before installation work, make sure that the refrigerantis R32. (Unless the refrigerant is R32, the normal operationcannot be expected.)-&WARNINGWhen flared joints are reused in indoors, the flarepart shall be re-fabricated.-& CAUTION-----------This air conditioner is a dedicated model for newrefrigerant R32. Make sure to meet the requirementsshown below and carry out installation work.• Use dedicated piping cutters and flaring tools forR32.• When making a flare connection, coat the flared innersurface only with ether oil or ester oil.• Use only the flare nuts attached to the air conditioner.If other flare nuts are used, it may cause refrigerantleakage.• To prevent contamination or moisture from gettinginto the piping, take measures such as pinching ortaping the pipings.Do not mix substance other than the specifiedrefrigerant such as air into the refrigeration circuit.If the refrigerant leaks during the work, ventilate theroom.• The refrigerant is pre-charged in the outdoor unit.• When connecting the pipings to the air conditioner, makesure to use a spanner and a torque wrench as shown inFig. 6.• For the dimension of flared part and the tightening torque,refer to the Table 2.• When making a flare connection, coat the flare innersurface only with ether oil or ester oil.(Refer to Fig.7)Then, turn the flare nut3 to 4 times with your hand andscrew in the nut.7Table 2Pipingsize(mm) 9.5 15.9Torque wrenchSpannerUnion jointFig.6Coat the flared inner surfaceonly with ether oil or ester oil1)-a-Fig.7Tightening Dimension fortorque processing flare Flare shape(N•m) A(mm)036.3 ± 3.6 13.0 ± 0.2 0�0(!J R0.4-0.8fl-�68.6 ± 6.8 19.5 ± 0.2 g <(-& CAUTION-----------Do not have oil adhere to the screw fixing part of resinparts.If oil adheres, it may weaken the strength of screwed part.Do not tighten flare nuts too tight.If a flare nut cracks, the refrigerant may leak.• If there is no torque wrench, use Table3 as a rule ofthumb.When tightening a flare nut with a spanner harder andharder, there is a point where the tightening torque suddenly increases.From that position, tighten the nut additionally at the angleshown in Table3.After the work is finished check securely that there is nogas leak.If the nut is not tightened as instructed, it may cause slowrefrigerant leak and result in malfunction (such as does notcool or heat).Table3Piping size Tightening Recommended arm length of(mm) angle tool used 9.5 60° - 90° approx. 200 mmqi 15.9 30° - 60° approx. 300 mm-& CAUTION-----------Insulation of field piping must be carried out up to theconnection inside the casing.If the piping is exposed to the atmosphere, it may causesweating, burn due to touching the piping, electric shocks ora fire due to the wiring touching the piping.