Panasonic R410A Installation Instructions Manual

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Panasonic R410A Installation Instructions Manual Manual pdf 4 page image

4Precautions for Installation Using New Refrigerant1. Care regarding tubing1-1. Process tubingMaterial: Use C1220 phosphorous deoxidized copper specified in JIS H3300 “Copper and Copper Alloy SeamlessPipes and Tubes.”Tubing size: Be sure to use the sizes indicated in the table below.Use a tube cutter when cutting the tubing, and be sure to remove any fl ash. This also applies to distribution joints(optional).When bending tubing ø5/8" or smaller, use a bending radius that is 4 times the outer diameter of the tubing or larger.CAUTIONUse sufficient care in handling the tubing. Seal the tubing ends withcaps or tape to prevent dirt, moisture, or other foreign substancesfrom entering. These substances can result in system malfunction.Material OCopper tube Outer diameter 1/4 3/8 1/2 5/8Wall thickness t0.032 t0.032 t0.032 t0.04Unit: inch1-2. Prevent impurities including water, dust and oxide from entering the tubing. Impurities can cause R410Arefrigerant deterioration and compressor defects. Due to the features of the refrigerant and refrigerating machineoil, the prevention of water and other impurities becomes more important than ever.2. Be sure to recharge the refrigerant only in liquid form.2-1. Since R410A is a non-azeotrope, recharging the refrigerant in gas form can lower performance and causedefects of the unit.2-2. Since refrigerant composition changes and performance decreases when gas leaks, collect the remainingrefrigerant and recharge the required total amount of new refrigerant after fixing the leak.3. Different tools required3-1. Tool specifications have been changed due to the characteristics of R410A.Some tools for R22- and R407C-type refrigerant systems cannot be used.Item Newtool?R407C toolscompatiblewith R410A?RemarksManifold gauge Yes No Types of refrigerant, refrigerating machine oil, andpressure gauge are different.Charge hose Yes No To resist higher pressure, material must be changed.Vacuum pump Yes Yes Use a conventional vacuum pump if it is equippedwith a check valve. If it has no check valve,purchase and attach a vacuum pump adapter.Leak detector Yes No Leak detectors for CFC and HCFC thatreact to chlorine do not function becauseR410A contains no chlorine. Leak detectorfor HFC134a can be used for R410A.Flaring oil Yes No For systems that use R22, apply mineral oil (Suniso oil)to the flare nuts on the tubing to prevent refrigerantleakage. For machines that use R407C or R410A, applysynthetic oil (ether oil) to the flare nuts.* Using tools for R22 and R407C and new tools for R410A together can cause defects.Manifold gaugeVacuum pumpOutletInlet