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  • Refrigerator Repair in MD

    1. Refrigerator Repair in MD
      Equipment Required: Manifold/Gage Set, Vacuum Pump, Freon Line Valves, New Compressor, New Drier, Solder, Torch, Freon, Freon Storage Bottle, Ice Water, Freon Pump.

      The refrigeration system is a closed circuit. If there is ever a leak in the system, cooling stops, the refrigeration compressor continues to run, refrigerator oil is lost and air gets into the system. The motor and piston pump overheat. Water from the air can combine with Freon in the overheated system to make acids that will damage other parts of the system.

    Refrigerator Repair in MD

    Refrigerator Repair in MD
    If you catch the problem early, the refrigeration system might be repaired easily. The first step is to tap into the refrigeration system. Some systems are designed with service ports (Schroeder valves) built into the large (low pressure) and small (high pressure) copper Freon lines going to and from the compressor. Otherwise, self-tapping valves can be installed onto the lines (available at appliance parts stores near you).

    Refrigerator Repair in MD

    Refrigerator Repair in MD
    Connect the appropriate flexible lines from your manifold gage set to the low and high pressure refrigeration lines. Read the Freon charge pressures on the high and low pressure lines – they should read about 50 psi each. If you have this pressure, you probably still have a full Freon charge. Turn on the refrigerator to start the refrigeration pump. The high pressure line should climb to about 120 psi or more and the low pressure line should reach at least 30 psi.
    Refrigerator Repair in MD
    Refrigerator Repair in MD
    If the Freon charge is gone or the compressor is not working, these pressures will not be reached. The refrigeration system must be discharged, parts replaced and the system recharged. If significant amounts of Freon remain in the system, the gas must be collected for proper disposal. This is done by pumping the Freon gas from the system into a specially adapted propane cylinder sitting in ice water. The pressurized Freon turns back to liquid in the cold propane cylinder for recycling.
    Refrigerator Repair in MD
    Refrigerator Repair in MD
    Freon Vacuum Pump/Compressor and Freon Recycle Canister
    An inexpensive Freon vacuum pump/compressor can be made using an old compressor from a junk refrigerator. Cut the large and small Freon lines to the compressor (after confirming the Freon on the junk refrigerator has been previously recycled). Disconnect the 120volt-ac lines that power the compressor. Remove the compressor from the junk refrigerator, preferably retaining with the rubberized frame mount. Connect a replacement 120V power line, on/off switch and electrical plug to the compressor.
    Refrigerator Repair in MD
    Crimp and solder to seal the copper high and low pressure Freon lines. Attach self-tapping valves to establish standard Schroeder connectors on the lines. You now have a low volume vacuum pump capable of drawing vacuum down to less than 1/10 atmosphere (100 mbar or 2 psig) at the large tube. The pump is capable of producing more than about 150 psi at the small tube. This pump can be used to liquefy Freon gas or to test refrigeration systems for leaks.

    Refrigerator Repair in MD

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