Samsung UH026EAV Installation Manual

Also see for UH026EAV Series: Service manual Service manual Installation manual Service manual

Contents

Connecting up and removing air In the circuitE-14The air in the indoor unit and in the pipe must be purged. If air remains in therefrigeration pipes, it will affect the compressor, reduce to cooling capacity andcould lead to a malfunction. Refrigerant for air purging is not charged in theoutdoor unit. Use Vacuum Pump as shown at the figure.Connect each assembly pipe to the appropriate valve on the outdoor unitand tighten the flare nut.1Referring to the illustration opposite, tighten the flare nut on section B firstmanually and then with a torque wrench, applying the following torque.Outer Diameter Torque (kgf•cm)6.35 mm (1/4") 140~1709.52 mm (3/8") 250~28012.70 mm (1/2") 380~42015.88 mm (5/8") 440~48019.05 mm (3/4") 990~121022.23 mm (7/8") 990~12102Connect the charging hose of low pressure side of manifold gauge to thepacked valve having a service port as shown at the figure.3Open the valve of the low pressure side of manifold gaugecounterclockwise.4Purge the air from the system using vacuum pump for about 10 minutes. Close the valve of the low pressure side of manifold gauge clockwise. Make sure that pressure gauge show -0.1MPa(-76cmHg) after about10 minutes.This procedure is very important in order to avoid gas leak. Turn off the vacuum pump. Remove the hose of the low pressure side of manifold gauge.5Set valve cork of both liquid side and gas side of packed valve to theopen position.6Mount the valve stem nuts and the service port cap to the valve, andtighten them at the torque of 183kgf•cm with a torque wrench.7Check for gas leakage. At this time, especially check for gas leakage from the 3-way valve’sstem nuts(A port), and from the service port cap.8ABCDOutdoor unitB(liquid)Stem capValve stemA(gas)Vacuum Pump❊ The designs and shape are subject tochange according to the model.