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  1. #14
    Join Date
    Jul 2009
    Omaha, NE
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    As previously stated, I would first ohm out the compressor and test the capacitor. Then I would cap off the liquid line and suction line connections, there is no need to loop them. I would then hook up my gauges, attach to jug of R-22, purge the air, and pressurize hoses to 5 psig. Then I would open the service valves to see if the system is even pressurized with refrigerant. If not, game over, you have a leak somewhere. (I guess at that point you could pressurize the system with nitrogen to see if you can identify the location of the leak.) If there is still refrigerant in the system, I would then slightly pressurize the suction side with vapor only, say 50 psig. Then manually depress the contactor and see if the compressor will even turn over. If it does work it will give you a chance to verify the pumping capacity of the compressor. It would be no different than pumping down a system. Your high side would be tied off and the compressor would only be pulling from the low side.

  2. #15
    Join Date
    Mar 2008
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    Quote Originally Posted by jdere View Post
    Hello to all,
    I have a five ton Goodman R-22 condenser I pulled out and replaced with a new one last year for a customer.
    Problem: I took this unit out, stored it, but I didn't write down what was wrong with it. I did closed down the refrigerant shut off's. I don't know if it has a huge leak or a bad compressor.
    I wanted to run it to see what is wrong with it.
    I am thinking of connecting a copper loop (few feet long) between the suction and discharge lines, fill it first with nitrogen, check for leaks.
    If I find no leaks, I can run a temporary line voltage and see if the compressor will kick on.
    What do you guys thinks of my methodology?
    You obviously replaced the condensing unit for a reason. Why bother with it?
    If you need to get rid of it, drop it off at Ruggles Station or in the 'bury. They'll help you out.

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