Panasonic S-15MY2E5A CZ-KPY3A Installation Instructions Manual

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Panasonic S-15MY2E5A CZ-KPY3A Installation Instructions Manual Manual pdf 14 page image

14● 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 thicknessø6.35 (1/4") 14 – 18 N · m{140 – 180 kgf · cm} 0.8 mmø9.52 (3/8") 34 – 42 N · m{340 – 420 kgf · cm} 0.8 mmø12.7 (1/2") 49 – 61 N · m{490 – 610 kgf · cm} 0.8 mmø15.88 (5/8") 68 – 82 N · m{680 – 820 kgf · cm} 1.0 mmø19.05 (3/4") 100 – 120 N · m{1000 – 1200 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 (local 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.Two tubes arranged togetherLiquid tubing Gas tubingInsulationFig. 5-7CAUTIONIf 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.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)Heat InsulationCAUTIONBe sure to perform heat insulation on the drain, liquid andgas piping. Imperfection in heat insulation work leads towater leakage.(1) Use the heat insulation material for the refrigerant pipingwhich has an excellent heat-resistance (over 120°C).Overlap with heatinsulator for piping.Heat insulator(Accessory)Heat insulator for piping(Local supply)Band(Accessory)IndoorunitFig. 5-8(2) Precautions in high humidity circumstance.This air conditioner has been tested according to the “JISStandard Conditions with Mist” and have been confirmedthat there are no faults. However, if it is operated for a longtime in high humid atmosphere (dew point temperature:more than 23°C), water drops are liable to fall. In this case,add heat insulation material according to the followingprocedure:• Heat insulation material to be prepared… Adiabaticglass wool with thickness 10 to 20 mm.• Stick glass wool on all air conditioners that are locatedin ceiling atmosphere.• In addition to the normal heat insulation (thickness:more than 8 mm) for refrigerant piping (gas piping: thickpiping) and drain piping, add a further of 10 mm to 30mm thickness material.Wall seal● When the outdoor unit is installed on a higher position thanthe indoor unit, install the trap so as not to instill rain waterinto the wall by transmitting in piping.● Stuff the space among piping, the electric wire, and the drainhose with putty and seal the penetration wall hole.Make surethat rain water do not instill into the wall.Drain pipePipe downIndoorunitPuttyPipeTrapIncision* Put the incision at the trap part of the heat insulator (for waterdrain) Fig. 5-9AMP Air Conditioningwww.ampair.co.uk | sales@ampair.co.uk