Panasonic S-60PT2R5A Installation Instructions Manual

Also see for S-100PT2R5A: Operating instructions

Contents

Panasonic S-60PT2R5A Installation Instructions Manual Manual pdf 16 page image

16● For the flare nuts at tubing connections, be sure to use theflare nuts that were supplied with the unit, or else flare nutsfor R410A (type 2). The refrigerant tubing that is used mustbe of the correct wall thickness as shown in the table below.Tube diameter Tightening torque(approximate) Tube thicknessø9.52 (3/8") 34 – 42 N · m{340 – 420 kgf · cm} 0.8 mmø15.88 (5/8") 68 – 82 N · m{680 – 820 kgf · cm} 1.0 mmBecause the pressure is approximately 1.6 times higher thanconventional refrigerant pressure, the use of ordinary flarenuts (type 1) or thin-walled tubes may result in tube rupture,injury, or asphyxiation caused by refrigerant leakage.● In order to prevent damage to the flare caused by over-tightening of the flare nuts, use the table above as a guidewhen tightening.● When tightening the flare nut on the liquid tube, use anadjustable wrench with a nominal handle length of 200 mm.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 120°C or above. For other tubing, it must beheat resistant to 80°C or above.Insulation material thickness must be 10 mm or greater.If the conditions inside the ceiling exceed DB 30°C and RH70%, increase the thickness of the gas tubing insulationmaterial by 1 step.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 20 mm awayfrom both ends.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 spaceAbout 20 mm About 20 mmFig. 5-7NOTETighten the clampers to prevent any condensation that mayoccur as the copper tubing is exposed.Insulation materialThe material used for insulation must have good insulationcharacteristics, be easy to use, be age resistant, and must noteasily absorb moisture.CAUTIONAfter a tube has been insulated, never try to bend it intoa narrow curve because it can cause the tube to break orcrack.Never grasp the drain or refrigerant connecting outletswhen moving the unit.5-4. Taping the Tubes(1) At this time, the refrigerant tubes (and electrical wiringif local codes permit) should be taped together witharmoring tape in 1 bundle. To prevent condensation fromoverflowing the drain pan, keep the drain hose separatefrom the refrigerant tubing.(2) Wrap the armoring tape from the bottom of the outdoorunit to the top of the tubing where it enters the wall. As youwrap the 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)Two tubes arranged togetherLiquid tubingGas tubingInsulationFig. 5-8Insulated tubes Drain hoseClampFig. 5-9CAUTIONIf the exterior of the outdoor unit valves has been finishedwith a square duct covering, make sure you allow sufficientspace to access the valves and to allow the panels to beattached and removed.NOTEDo 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.