Haier 1U71S2SG1FA Service Manual

Also see for 1U71S2SG1FA: Installation manual Service manual Installation manual

Contents

1802. Tools and materials that may be used with R32 with some restrictionsTools/Materials Use NotesGas leak detector Detection of Gas Leaks The Ones for HFC Type RefrigerantMay be Used.Vacuum Pump Vacuum Drying May be Used if A Reverse FlowCheck Adaptor is Attached.Flare Tool Flare Machining of PipingChages Have Been Made in theFlare Machining Dimension. Refer tothe Next Page.Refrigerant Recovery Equipment Recovery of Refrigerant May be Used if Designed for UseWith R32Tools for R32 must be handled with special care, and keep moisture and dust from entering the cycle.R32 leakage TestNo changes from the conventional method. Note that a refrigerant leakage detector for R22 or R410A cannot detectR32 leakage.Items to be Strictly Observed:1.Pressurize the equipment with nitrogen up to the design pressure and then judge the equipment's air tightness,taking temperature variations into account.2.When investigating leakage locations using a refrigerant, be sure to use R32.3.Insure that R32 is in a liquid state when charging.Reasons:1.Use of oxygen as the pressurized gas may cause an explosion.2.Charging with R32 gas will lead the composition of the remaining refrigerant in the cylinder to change and thenthis refrigerant can not be used.Halide torch R22 or R407C leakage detector3. Tools and materials that are used with R410A that can also be used with R32Tools/Materials Use NotesVacuum Pump With a Check Valve Vacuum DryingBender Bending PipesTorque Wrench Tightening Flare NutsOnly Φ12.70 (1/2'') and Φ15.88(5/8'')have a larger flare machiningdimension.Pipe Cutter Cutting PipesWelder and Nitrogen Cylinder Welding PipesRefrigerant Charging Meter Refrigerant ChargingVacuum Gauze Checking Vacuum Degree4.Tool and materials that must not used with R32Tools/Materials Use NotesCharging Cylinder Refrigerant Charging Must Not be Used With R32-TypeUnits.