Panasonic U-72MF2U9 Installation Instructions Manual

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Panasonic U-72MF2U9 Installation Instructions Manual Manual pdf 26 page image

263-5. Connect the Tubing● Use the supplied connector tubing.Type 72 (6 Ton) Type 120 (10 Ton)①④②③RefrigeranttubingConnectionmethodUse Suppliedconnectortube?1 Suction tube Brazing No2 Discharge tube Flare No3 Liquid tube Flare No4 Balance tube Flare NoType 144 (12 Ton)①④②③RefrigeranttubingConnectionmethodUse Suppliedconnector tube?1 Suction tube BrazingYesø1" ø1-1/8"(ø25.4 ø28.58)2 Discharge tube BrazingYesø3/4" ø7/8"(ø19.05 ø22.22)3 Liquid tube Flare No4 Balance tube Flare NoType 96 (8 Ton)①④②③RefrigeranttubingConnectionmethodUse Suppliedconnectortube?1 Suction tube Brazing No2 Discharge tubeService valvemounted on theunit side: FlarecounectionTubing side: BrazingYesø5/8” (ø15.88)Flare↓ø3.4” (ø19.05)Brazing3 Liquid tube Flare No4 Balance tube Flare No3-4. Prepare the Tubing● Material: Use C1220 phosphorous deoxidized copper as described in JIS H3300, “Copper and copper alloy seamless pipes andtubes”.● Tubing size: Use the tubing size indicated in the table below.● When cutting the tubing, use a tube cutter, and be sure to remove any burrs.(The same applies to distribution tubing (optional).)● When bending the tubes, bend each tube using a radius that is at least 4 times the outer diameter of the tube.When bending, use sufficient care to avoid crushing or damaging the tube.● For flaring, use a flare tool, and be sure that flaring is performed correctly.Unit: in. (mm)CAUTION Use sufficient caution duringpreparation of the tubing.Seal the tube ends by meansof caps or taping to preventdust, moisture, or other foreignsubstances from entering thetubes.Refrigerant tubing (Existing tubing can be used.)Tubing size (in. (mm))Material: O Material: OOuter diameter Wall thickness Outer diameter Wall thickness1/4" (6.35) 0.025 (0.635) 7/8" (22.22) 0.045 (1.143)3/8" (9.52) 0.030 (0.762) 1-1/8" (28.58) 0.050 (1.27)1/2" (12.7) 0.035 (0.889) 1-3/8" (34.92) 0.055 (1.397)5/8" (15.88) 0.040 (1.016) 1-5/8" (41.28) 0.060 (1.524)3/4" (19.05) 0.042 (1.0668)SuppliedtubeSuppliedtubeFlaring process to the tip of the supplied tubesRemove flare nuts attached to the service valve and reuse them.Note: Make sure the service valve is completely closed.If not, the gas leak will be occurred.Use the wide area of the outer tubing surface of the supplied tubes.• Supplied tubing outer diameter ø3/4 (ø19.05)• Local tubing inner diameter ø3/4 (ø19.05)In case of type 96