Panasonic S-12MT2U6 Installation Instructions Manual

Also see for S-12MT2U6: Installation instructions Operating instructions Installation instructions Installation instructions Operating instructions

Contents

18Fig. 5-8Fig. 5-9Flare insulator (supplied)Insulation tape (white)(supplied)Tube insulator (not supplied)Heat resistant 248°F (120°C) oraboveFlare unionFlare nutUnit sideInsulated tubes Drain hoseClampNOTEDo not wind the armoring tape too tightly since this willdecrease the heat insulation effect. Also ensure that thecondensation drain hose splits away from the bundle and dripsclear of the unit and the tubing.5-3. Insulating the Refrigerant TubingTubing Insulation● Thermal insulation must be applied to all units tubing,including distribution joint (field supply).* For gas tubing, the insulation material must be heatresistant to 248°F (120°C) or above. For other tubing, itmust be heat resistant to 176°F (80°C) or above.Insulation material thickness must be 13/32” (10 mm) orgreater.If the conditions inside the ceiling exceed DB 86°F (30°C)and RH 70%, increase the thickness of the gas tubinginsulation material with one grade higher.Insulation of the flare nutsAttach the flare insulator (supplied) just like wrapping aroundthe flare nut (supplied). Match the both slits of flare insulatorsfor gas and liquid tubes facing upward. Tightly attach the end ofthe flare insulators to the tube cradle without any space. Thenclamp the flare insulator with the clampers about 25/32” (20 mm)away from both ends.WARNINGIf the exterior of the outdoor unitvalves has been finished with asquare duct covering, make sure youallow sufficient space to access thevalves and to allow the panels to beattached and removed.Taping the flare nutsWind the white insulation tape around the flare nuts at the gastube connections. Then cover up the tubing connections withthe flare insulator, and fill the gap at the union with the suppliedblack insulation tape. Finally, fasten the insulator at both endswith the supplied vinyl clamps. (Fig. 5-8)Insulation materialThe material used for insulation must have good insulationcharacteristics, be easy to use, be age resistant, and must noteasily absorb moisture.WARNINGAfter a tube has been insulated,never try to bend it into a narrowcurve because it can cause the tubeto break or crack.Never grasp the drain or refrigerantconnecting outlets when moving theunit.5-4. Taping the Tubes(1) At this time, the refrigerant tubes (and electrical wiring iflocal codes permit) should be taped together with armoringtape in 1 bundle. To prevent condensation from overflowingthe drain pan, keep the drain hose separate from therefrigerant tubing.(2) Wrap the armoring tape from the bottom of the outdoor unitto the top of the tubing where it enters the wall. As you wrapthe tubing, overlap half of each previous tape turn.(3) Clamp the tubing bundle to the wall, using 1 clamp approx.each meter. (Fig. 5-9)Flare insulator (for gas tube)Flare insulator(for liquid tube)Facing upwardGas tubingLiquid tubingTube cradleClamper Flare nut(supplied) ClamperInsulator (not supplied)Indoor unitsideOutdoor unitsideTube cradleWithout any spaceAbout25/32” (20 mm)About25/32” (20 mm)Fig. 5-7NOTETighten the clampers to prevent any condensation that mayoccur as the copper tubing is exposed.