York J Series Installation Manual

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York J Series Installation Manual Manual pdf 9 page image

7EnglishREFRIGERANT PIPINGPiping Length & ElevationIf the pipe is too long, both the capacity andreliability of the unit will drop. As the numberof bends increases, resistance to the flow ofrefrigerant system increases, thus loweringcooling capacity. As a result, the compressor maybecome defective. Always choose the shortestpath and follow the recommendations astabulated below:Outdoor UnitIndoor UnitModelMin. allowable length (L)Max. allowable length (L)Max. allowable height (H)Gas pipeLiquid pipe10 153m15m10mO.D. 9.5mm O.D. 12.7mmO.D. 6.4mmL H*Be sure to add the proper amount of additionalrefrigerant. Failure to do so may result inreduced performance.Remark: The refrigerant pre-charged in theoutdoor unit is for piping length up to7.5 m.Piping Works• Do not use contaminated or damaged coppertubing. Do not remove plastic, rubber plugsand brass nuts from the valves, fittings, tubingsand coils until you are ready to connect suctionor liquid line into valves or fittings.• If any brazing work is required, ensure thatthe nitrogen gas is passed through coil andjoints while the brazing work is being done.This will eliminate soot formation on theinside walls of the copper tubings.• Cut the connection pipe with a pipe cutter.• Remove burrs from cut edges of the pipes withremover.Hold the end of the pipe downwards to preventmetal chips from entering the pipe.• Insert the flare nuts, mounted on theconnection parts of both the indoor unit andoutdoor unit onto the copper pipes.• Flare the pipe with extra length above theflaring tool as shown in the table.• The flared edge must be even and not crackedor scratched.Ø Tube, D A (mm)Inch mm Imperial Rigid1/4" 6.35 1.3 0.73/8" 9.52 1.6 1.01/2" 12.70 1.9 1.35/8" 15.88 2.2 1.73/4" 19.05 2.5 2.0Cutting copper tube1/4tRemove burrCopper tubeSwaging block