Panasonic CS-F28DTE5 Simplified Service Manual

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Contents

Panasonic CS-F28DTE5 Simplified Service Manual Manual pdf 15 page image

153. Notes when connecting the refrigerant pipes.• Use clean copper, pipes with no water or dust on the insides.• Use phosphorus-free, unjointed copper pipes for the refrigerant pipes.• If it is necessary to cut the refrigerant pipes, be sure to use a pipe cutter, and use compressed nitrogen or an air blower toclean out any foreign particles from inside the pipe.• Be careful not to let any dust, foreign materials or water get inside the pipes during connection.• If bending the pipes, allow as large a bending radius as possible. Do not flex the pipes any more than necessary.• If joining pipe ends, do so before tightening the flare nut.• Always blow the pipe end with nitrogen while joining pipe ends.(This will prevent any oxide scaling from occurring inside the pipe.)• If using long pipe lengths with several joined pipe ends, insert strainers inside the pipes. (Strainers are not supplied.)• When tightening the flare nuts, coat the flare (both inside surfaces) with a small amount of refrigerator oil, and screw in about3-4 turns at first by hand.• Refer to the following table for the tightening torques. Be sure to use two spanners to tighten.(If the nuts are overtightened, it may cause the flares to break or leak.)4. After piping connection has been completed, make sure that the joint areas of the indoor and outdoor units are free from gasleakage by the use of nitrogen, etc.5. Air purge within connection piping shall be carried out by evacuation.6. Close the tube joining area with putty heat insulator (local supply) without any gap as shown in below figure.(To prevent insects or small animal entering)7.1.7. Heat insulation7.1.8. Charging with refrigerant• At the time of shipment from the factory, this unit is charged with enough refrigerant for an equivalent pipe length of 30m. If theequivalent pipe length used will be 30m or less, no additional charging will be necessary.• If the equivalent pipe length will be between 30 and 50m, charge with additional refrigerant according to the equivalent lengthgiven in the table below.- For standard typeCaution Use a material with good heat-resistant properties asthe heat insulation for the pipes. Be sure to insulateboth the gas-side and liquid-side pipes. If the pipes arenot adequately insulated, condensation or waterleakages may occur.Liquid-side pipes Material that can withstandGas-side pipes 120°C or higherAdditional charging amount Equivalent length0.05 kg/m 50m