Haier HU062WAMNA Operation & Installation Manual

Also see for HU062WAMNA: Service manual

13E. Refrigerant Piping InstallationInstallation Instructions• Please make flare after inserting flare nut (located at joint portion oftube assembly) onto the copper pipe. (in case of using long piping)• Do not use pipe wrench to open refrigerant piping. Flare nut may bebroken and cause leakage. Use proper spanner or ring wrench.• Connect the piping:- Align the center of piping and sufficiently tighten the flare nut withhands.- Be sure to use two spanners to tighten the connection. Further tightenthe flare nut with torque wrench in specified torque as stated in table.Note:• Do not over tighten, over tightening may cause gas leakage.• Do not pull and push refrigerant piping excessively, pipe deformationmay cause refrigerant leakage.Cutting and flaring the piping• Please cut the pipe with pipe cutter and make sure there is no burrsremained, or gas leakage may be caused.• Remove the burrs with reamer, and hold the pipe with end in a downward direction to avoid the metal powder enteringthe piping inside.• Please make flare after inserting the flare nut onto the copper pipes.F. Leakage test, Evacuation, Check valve operation, Additional refrigerant charging• See it in the outdoor installation manual.G. Charging the WaterWater quality requirementIt is necessary to analyse the quality of water by checking pH, electrical conductivity, ammonia ion content, sulphurcontent, and others. The following is the recommended standard water quality.Contents Unit ValueStandard Quality pH(25°C) / 7.5-9Electrical conductivity {2} μS/cm 10-500Alcalinity HCO3- mg/l 70-200Sulphate SO42- mg/l <70Alcalinity /Sulphate HCO3- / SO42- mg/l >1.5Ammonium NH4+ mg/l <2Free chlorine Cl2 mg/l <1Hydrogen sulfide H2 S mg/l <0.05Free carbon dioxide(aggressive) CO2 mg/l <5Nitrate NO3- mg/l <100Iron Fe mg/l <0.2Aluminium Al mg/l <0.2Manganese Mn mg/l <0.1Chloride content Cl- mg/l ≤50Total Hardness CaCO3 (°dH) 4.5-8.5Ammonia NH3 mg/l <0.5CAUTIONIf the Chloride content ( Cl- ) in the circulating water of the system exceeds the required limits, please add zinc rod tothe system to remove the excessive chloride.Always use a backup wrench whentightening and loosening flare nuts. Tubingwill twist if not properly supported.The flare nut or the flare fitting will bedamaged if the tubing is not properlyaligned with the flare fitting when startingthe flare nut. Do not use tools to start theflare nut, but use hands only to beginthreading the nut.backup wrenchConnectorNuttorque wrench