Haier 1U105S2SS1FA Installation Manual

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16Precautions for refrigerant piping Do not twist or crush piping. Be sure that no dust is mixed in piping. Bend piping with as wide angle as possible. Keep insulating both gas and liquid piping. Check flare-connected area for gas leakage.7.4. Piping connection method Apply refrigerant oil to the joint and the flange. To bend a pipe, give the roundness as possible not tocrush the pipe. When connecting pipe, hold the pipe centre to centreand then screw nut on by hand, refer to Fig. Be careful not to let foreign matters, such as sandsenter the pipeSpannerSpannerJointNutPipe diameter Fastening torque (N.m)Liquid pipe Φ 6.35mm 14.2-17.2Liquid pipe Φ 9.52mm 32.7-39.9Gas pipe Φ 12.7mm 49.5-60.3Gas pipe Φ 15.88mm 61.8-75.4Gas pipe Φ 19.05mm 97.2-118.6 Field pipes can be installed in four directions (A, B, C, D, E).A: ForwardB: SidewaysC: BackwardD: DownwardE: Power supply cable outdoor and indoor connection cable Cutting out the two slits makes it possible to install asshown in the figure "Field pipes in 4 directions".(Use a metal saw to cut out the slits.) To install the connecting pipe to the unit in adownward direction, make a knock-out hole bypenetrating the centre area around the knock-out hole using a Ø6 mm drill (4x). After knocking out the knock-out hole, it isrecommended to apply repair paint to the edge andthe surrounding end surfaces to prevent rusting. When passing electrical wiring through the knock-outholes, remove any burrs from the know-out holes andwrap the wiring with protective tape to prevent damage.7.5. Preventing foreign objects from enteringPlug the pipe through-holes with putty or insulatingmaterial (procured locally) to stop up all gaps, as shownin the figure.1 Putty or insulating material (produced locally)If there is any possibility that small animals enter thesystem through the knock-out holes, plug the holes withpacking materials (field supplied).Insects or samall animals entering the outdoor unit maycause a short circuit in teh electrical box.Seal knock-out holes to avoid snow and humidity entering.7.6. Preventing foreign objects from entering Be careful not to let the indoor and outdoor pipingcome into contact with the compressor terminal cover.If the liquid-side piping insulation might come intocontact with it, adjust the height as shown in thefigure below. Also, make sure the field piping doesnot touch the bolts or outer panels of the compressor. When the outdoor unit is installed above the indoorunit the following can occur:The condensed water on the stop valve can move tothe indoor unit. To avoid this, please cover the stopvalve with sealing material.