Samsung MH080FX*A4 series Instruction Manual

Contents

E-18Connecting Up and Purging the Circuit(Cont.)ABCVacuumPumpCOMPLETING THE INSTALLATION MH080FXA41 Check the piping connections.2 Connect the charging hose of low pressure side of manifold gauge to thepacked valve having a service port (5/8” Packed valve) as shown at thefigure (Value stem: 1/2” - 20UNF).WARNING:Make the electrical connection and leave the system into “stand by mode”. Donot turn on the system!.This is necessary for better vacuum operation (full OPEN position of ElectronicExpansion Valve - EEV -).3 Open the valve of the low pressure side of manifold gaugecounter clockwise.4 Purge the air from the system using vacuum pump for about 30 minutes.- Close the valve of the low pressure side of manifold gauge clockwise.- Make sure that pressure gauge show -0.1MPa(-76cmHg) after about30 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.5 Set valve cork of both liquid side and gas side of packed valve to the openposition.6 Mount the valve stem nuts and the service port cap to the valve, and tightenthem at the torque of 13.2 ft•lb with a torque wrench.7 Check for gas leakage.- At this time, especially check for gas leakage from the 3-way valve’s stemnuts, and from the service port cap.Valve stemStem capService portAdding RefrigerantIf you install the excessive length of pipe, add additional refrigerant as 10g per unitmeter ; refer to the table below.Refer to the Service Manual for more details on this operation.Model Total connecting pipe length (L) Adding refrigerantMH050FX*A2* LT≤65.6ft ChargelessLT>65.6ft (LT- 65.6ft)x0.11ozMH080FX*A4* LT≤131.2ft ChargelessLT>131.2ft (LT- 131.2ft)x0.11oz