Samsung AR**HSFS Series User & Installation Manual

Contents

1. Connect each assembly pipe to the appropriate valve on the outdoor unit andtighten the flare nut.2. Tighten the flare nut first with your hands, and then with a torque wrench,applying the following torque.Outdoor unit Indoor unitGas pipe sideLiquid pipe side• Excessive torque can be cause of gas leakage.• Make the electrical connection and leave the system into “stand bymode”. Do not turn on the system!This is necessary for better vacuum operation (full OPEN position ofElectronic Expansion Valve - EEV -).3. Connect the charging hose of the low-pressure side of manifold gauge to agas service port as seen in the picture.4. Open the valve of the low pressure side of manifold gauge counterclockwise.5. Evacuate the air in the connected pipes using the vacuum pump for about15 minutes. Make sure that pressure gauge shows -0.1 MPa(-76 cmHg) after about10 minutes.This procedure is very important to avoid a gas leak. Close the valve of the low pressure side of manifold gauge clockwise. Turn off the vacuum pump. Check for 2 minutes if there is any pressure change. Remove the hose of the low pressure side of manifold gauge.6. Set a valve cork of liquid and gas service port to the open position.VacuumPumpManifold gaugeValveGas service portLiquid service port (Backward flowingprevention)• The remaining air in the Refrigeration cycle, which contains moisture, may cause malfunction on the compressor.• Always contact the service center or a professional installation agency for product installation.Add refrigerant charge according to table below:If you use a pipe longer than 4 or 5 m,‘15’ g of refrigerant R-410A must be added for each extra meter.If you use a pipe shorter than 4 or 5 m,The evacuate time is normal.Refer to the Service Manual for further details.Adding RefrigerantOuterDiameterTorqueN•m kgf•cmø6.35 mm 14~18 140~180ø9.52 mm 34~42 350~430ø12.70 mm 49~61 500~620ø15.88 mm 68~82 690~830Evacuating the connected pipesEnglish-20A3050 EU_IM_DB68-04212A_HP_EN.indd 20 2013-10-23 16:31:15