Samsung MH026FNCA Service Manual

Also see for MH026FECA: Service manual

10-3Samsung Electronics1. Check the piping connections.2. Connect the charging hose of low pressure side of manifold gauge to thepacked valve having a service port (3/8" service valve) as shown at thefigure.3. Open the valve of the low pressure side of manifold gauge counter-clockwise.4. Purge 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.5. Set valve cork of both liquid side and gas side of packed valve to theopen position.6. Mount the valve stem nuts and the service port cap to the valve, andtighten them at the torque of 183kgf•cm with a torque wrench.7. Check for gas leakage.• At this time, especially check for gas leakage from the 3 way valve’sstem nuts, and from the service port cap. MH050FXCA2A10-2 Connecting Up and Purging the Circuit• The air in the indoor unit and in the pipe must be purged. If air remains in the refrigeration pipes, it will affectthe compressor, reduce to cooling capacity and could lead to a malfunction. Refrigerant for air purging is notcharged in the outdoor unit. Use Vacuum Pump as shown at the right figure. Each unit must be purged in turn.IndoorA-unitIndoorB-unitVacuumPumpService portValve stemStem cap