York YFGN24BZNRZUH1 Installation And Maintenance Manual

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York YFGN24BZNRZUH1 Installation And Maintenance Manual Manual pdf 21 page image

Installation and Maintenance199.2 Connecting Tubing between Indoorand Outdoor UnitsBe sure to apply a sealing cap or water-proof tapeto prevent dust or water from getting into the tubesbefore they are used.Be sure to apply refrigerant lubricant to thematching surfaces of the flare and union beforeconnecting them together. This is effective forreducing gas leaks. (Fig. 9.4)For proper connection, align the union tube andflare tube straight with each other, then tighten theflare nut lightly to obtain a smooth match. (Fig. 9.5)Tighten the sets crew with torque wrench to preventleak of refrigerant. Carefully test leak before runningthe appliance.Remove the burrs at the end of the copper tubewith a tube reamer or file. When reaming, hold thetube bend downward and be sure that no copperscraps fall into the tube. This process is importantand should be done carefully to make a good flare.(Fig. 9.1, 9.2)Remove the flare nut from the unit and be sure tomount it on the copper tube.Make a flare at the end of copper tube with a flaretool. (Fig. 9.3)9.4 Taping the TubingNote: Do not bind the armoring tape too tightly becausethis will decrease the heat insulation effect. Also besure the condensed drain hose splits away frombundle and drips clear of the unit and the tubing.The two refrigerant tubes (and electrical wire if localcodes permit) should be taped together with whitearmoring tape. The drain hose may also be includedand taped together as a bundle with the tubing.Wrap the tape from the bottom of the outdoor unit tothe top of the tubing where it enters the wall. As youwrap the tubing, overlap half of each previous tape.(See Fig. 9.7)Clamp the tubing bundle to the wall, using oneclamp approx. every 120 cm.9.5 Finishing the installationAfter completion of wrapping and insulation, seal thehole on the wall with suitable seal against wind and rain.To avoid loss of heat and in prevention of theground being wet by condensed water, allrefrigerant tubes must be insulated with suitableinsulating materials whose minimum thickness willbe 6 mm. (See Fig. 9.6)9.3 Heat Insulation of the Refrigerant Tube9.1 Flaring with Tube ExpanderNote: A good flare have the following characteristics:Inside surface is glossy and smooth.Edge is smooth.Tapered sides are of uniform length.9.Refrigerant TubingClampInsulated tubesTubeTapered nutsFlarerFig. 9.3Apply refrigerant lubricant here and thereUnion Flare nutInsulationReamerTubeFig. 9.1Before AfterFig. 9.2Fig. 9.5Fig. 9.4Fig. 9.6Fig. 9.7

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