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113P184443-12N English6. REFRIGERANT PIPING WORKpiping. Otherwise, a water leakage can result sometimes.>Be sure to use insulation designed for use with HVAC systems.exceed 86°F or RH80%, reinforce the refrigerant insulation (13/16 in. or thicker). Condensationmay form on the surface of the insulating material.>possible if the types of refrigerant are not the same.>CAUTION• Use a pipe cutter and flare suitable for the type of refrigerant.• Apply ester oil or ether oil only inside of the flare portions before connecting.• To prevent dust, moisture or other foreign matter from infiltrating the tube, either pinch the endor cover it with tape.• Do not allow anything other than the designated refrigerant to get mixed into the refrigerantcircuit, such as air. If any refrigerant gas leaks while working on the unit, thoroughly ventilatethe room immediately.• Do not mix air or other gas with the specified refrigerant in therefrigeration circuit.• Ventilate the room if refrigerant gas leaks during the work.• The outdoor unit is charged with refrigerant.• Be sure to use both a spanner and torque wrench together, asshown in the drawing, when connecting or disconnecting pipes to/from the unit. (Refer to Fig. 13)• Refer to Table 3 for the dimensions of flare nut spaces.• When connecting the flare nut, coat the flare section (only inside)with ester oil or ether oil, rotate three or four times first, then screwin. (Refer to Fig. 14)• Keep all the screw mounting resin parts (e.g., piping presserplates) away from oil.If oil adheres, the strength of the screw mounting resin parts maydrop.CAUTIONOver-tightening may damage the flare and cause a refrigerantleakage.Torque wrenchSpannerPiping unionFlare nutFig. 13Apply ester oil orether oil only insideFig. 14NOTE• Use the flare nut included with the unit main body.Table 3Pipe size Tightening torque Flare dimensions A (in.) Flareø1/4” 10.4 - 12.7 ft-lbf 0.342 - 0.358 R0.016 - 0.031ø1/2” 36.5 - 44.5 ft-lbf 0.638 - 0.654• Refer to Table 3 to determine the proper tightening torque. |
