Panasonic S-200PE2E5 Technical Data & Service Manual

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Panasonic S-200PE2E5 Technical Data & Service Manual Manual pdf 53 page image

1-471Ensure to fill only with liquid refrigerant when refi lling.If gas refrigerant is filled, the refrigerant composition willnot be balanced and will cause abnormal operation.Cylinder witha siphon tubeLiquid refrigerantSiphon tubeCylinder CylinderGas refrigerantPossible(For refilling due to a leak)Not possible1-12. VACUUM PURGING1-13. REGARDING REFRIGERANT FILLINGPrecautions during refrigerant fillingCharging with refrigerantIf using cylinders as shown in the bottom left diagram; withouta siphon tube inside, turn it upside down and use it.(It is recommended to use the manifold with the side glass.)Use tools that are designed specifically for R410A, for pressure resistance and to prevent mixing impurities.Fill the refrigerant from the 3-way valve’s service port on the liquid-side.For filling and replacing all refrigerantFor refi lling refrigerant, first collect all residual refrigerant and after vacuum dehydration using the vacuum pump. Refill therefrigerant according to the prescribed amount stated on the placard affixed to this unit.Precautions after the pipes’ connection have completedEnsure to open the 3-way valve after completing the piping installation, leak test and vacuuming. If it is closed during operation,it can lead to compressor failure.At the time of shipment from the factory, this unit is charged with enough refrigerant for an equivalent pipe length of 30m.If the equivalent pipe length used will be 30m or less, no additional charging will be necessary.If the equivalent pipe length will be between 30 and 120m, charge with additional refrigerant according to the equivalent lengthgiven in the table below.For standard typePump down operationPlease refer to the service manual for pump down method.Liquid refrigerantModel name Add. gas amount Equivalent length Minimum lengthm5m021m/g05A8E2EP002-Um5m021m/g08A8E2EP052-UKeep 3-way valve fully closed and pressurize through 3-way valve service port.Do not pressurize to the default value at once. Pressurize gradually.1 Pressurize to 0.5MPa (5kgf/cm²G) and then leave it for 5 minutesto ensure that the pressure does not drop.2 Pressurize to 1.5MPa (15kgf/cm²G) and leave it for 5 minutesto ensure that the pressure does not drop.3 For the test, pressurize to 4.15MPa and leave it for about 1 dayto ensure that the pressure does not drop.Leak Tightness Test MethodVacuum PurgingUse a vacuum pump (with back-flow prevention device) to vacuumthrough the 3-way valve service port to achieve the pressure below-101kPa (5 Toor).Air and moisture remaining in the refrigerant system due to poorvacuum drying can cause performance decrement and malfunctionof the compressor.Outdoor unit3-wayvalveIndoor unitUse nitrogen gas for the leak tightness test.Using flammable gas can cause an explosion.PressuremeterNitrogen RefrigerantmeterVacuumpump