165. Drain Tubing·Install the drain tubing·Make sure the drain works properly.The diameter of drain connection hole should· tubebe same as that of the drain .tubeKeep the drain short and sloping down wards at· tubea gradient of at least 1/100 to prevent air pockets fromforming.Refrigerant pipesDrain pipe connection hole(external straight pipe thread)Water accumulating in the drain tubing can causethe drain to clog.RefrigerantpipesBucketInstallation and MaintenanceCAUTIONCAUTION·To keep the drain tube from sagging, space hangingwires every 1 to 1.5 m.Use the drain hose and the clamp. Insert the drain·hose fully into the drain socket and firmly tighten thedrain hose and warm-keeping material with the clamp.The two areas below should be insulated because·condensation may form there causing water to leak.Drain ing passing indoors· tubDrain sockets.·Referring the figure below, insulate the drain socket·and drain hose using the included large sealing pad.Drain hoseSealing material Sealing materialINDOORUNIT INDOORUNITDrain tubing connectionsDo not connect the drain directly to sewage tubes thatsmell of ammonia. The ammonia in the sewage mightenter the indoor unit through the drain tubes and corrodethe heat exchanger.Do not twist or bend the drain hose, so that excessiveforce is not applied to it.This type of treatment may cause leaking.After tubing work is finished, check drainage flowssmoothly.Gradually insert approximately 1000 cc of water intothe drain pan to check drainage in the manner describedbelow.Gradually pour approximately 1000 cc of water fromthe outlet hole into the drain pan to check drainage.Check the drainage.······