Daikin FHQ35CAVEB Installation Manual

Also see for FHQ100CAVEB: Service manual Service manual Installation manual Operation manual

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Daikin FHQ35CAVEB Installation Manual Manual pdf 7 page image

English 6A. When the drain piping is tilted to the right, or to the rightand back.Place it level, or tilt it slightly to the right or the back.(Within 1°)B. When the drain piping is tilted to the left, or to the leftand back.Place it level, or tilt it slightly to the left or the back.(Within 1°)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 WORK• For the outdoor unit refrigerant piping, refer to the installationmanual attached to 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 highhumidity, strengthen the insulation material for refrigerantpiping. If not strengthened, the surface of insulation materialmay sweat.• Before installation work, make sure that the refrigerant isR410A. (Unless the refrigerant is R410A, the normal opera-tion cannot be expected.)CAUTIONThis air conditioner is a dedicated model for new refrigerantR410A. Make sure to meet the requirements shown rightand carry out installation work.• Use dedicated piping cutters and flaring tools for R410A.• When making a flare connection, coat the flared inner sur-face only with ether oil or ester oil.• Use only the flare nuts attached to the air conditioner. Ifother flare nuts are used, it may cause refrigerant leakage.• To prevent contamination or moisture from getting into thepiping, take measures such as pinching or taping the pip-ings.Do not mix substance other than the specified refrigerantsuch as air into the refrigeration circuit.If the refrigerant leaks during the work, ventilate the room.• Remove the stay for packing and delivering (reinforcingplate) before refrigerant piping work.(Refer to Fig. 18)• The refrigerant is pre-charged in the outdoor unit.• When connecting the pipings to the air conditioner, make sureto use a spanner and a torque wrench as shown in Fig.13.For the dimension of flared part, refer to the Table 1.• When making a flare connection, coat the flared inner surfaceonly with ether oil or ester oil. (Refer to Fig. 14) Then, turn theflare nut 3 to 4 times with your hand and screw in the nut.• For the tightening torque, refer to the Table 1.Table 1CAUTION• 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 Table 2 as a rule of thumb.When tightening a flare nut with a spanner harder andharder, there is a point where the tightening torque suddenlyincreases. From that position, tighten the nut additionally theangle shown in Table 2. After the work is finished, checksecurely that there is no gas leak. If the nut is not tightenedas instructed, it may cause slow refrigerant leak and result inmalfunction (such as does not cool or heat).Table 2AA.BB≤ 1°≤ 1°≤ 1°Fig. 12Piping size(mm)Tighteningtorque (N·m)Dimensionfor processingflare A (mm)Flare shape 6.4 15.7 ± 1.5 8.9 ± 0.2 9.5 36.3 ± 3.6 13.0 ± 0.2 12.7 54.9 ± 5.4 16.4 ± 0.2 15.9 68.6 ± 6.8 19.5 ± 0.2Piping size(mm) Tightening angle Recommended arm lengthof tool used 6.4 60° – 90° Approximately 150mm9.5 60° – 90° Approximately 200mm 12.7 30° – 60° Approximately 250mm 15.9 30° – 60° Approximately 300mmTorque wrenchSpannerFlare nutUnion joint Fig. 13Coat the flared inner surfaceonly with ether oil or ester oil.Fig. 14R0.4-0.890°±2°A45°±2°