Panasonic S-22MM1E5A Installation Instructions Manual

Panasonic S-22MM1E5A Installation Instructions Manual Manual pdf 17 page image

17ENGLISH● 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 must be of the correct wallthickness as shown in the table below.Tube diameter Tightening torque(approximate) Tube thicknessø6.35 (1/4") 14 – 18 N · m{140 – 180 kgf · cm} 0.8 mmø12.7 (1/2") 49 – 61 N · m{490 – 610 kgf · cm} 0.8 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. Ifthe conditions inside the ceiling exceed DB 30°C and RH70%, increase the thickness of the gas tubing insulationmaterial by 1 step.Two tubes arranged togetherLiquid tubing Gas tubingInsulationFig. 5-7Insulation 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)Tube cradleFacing upwardLiquid tubingGas tubingInsulator (not supplied) Without any spaceTube cradleIndoor unitsideOutdoor unitsideAbout 20 mmAbout 20 mmClamperClamper Flare nut(supplied)Fig. 5-8NOTETighten 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.AMP Air Conditioningwww.ampair.co.uk | sales@ampair.co.uk