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  1. #1
    Join Date
    Dec 2005
    Location
    USA
    Posts
    203
    Rep Power
    13

    How to test a stored "pumped down" condensing unit.



    Hi guys, I have a 1.5 hp condensing unit that was in a self contained salad bar for about a week. The customer wisely decided to remote this with another case and this unit has been in storage for two years. It was pumped down.

    My question; How best may I test this compressor without installing it into a system?

    As always thanks for your input.



  2. #2
    Join Date
    Aug 2006
    Location
    england
    Age
    43
    Posts
    3,790
    Rep Power
    38

    Re: How to test a stored "pumped down" condensing unit.

    If its still got refrigerant in it you could connect it to a clean and empty recovery cylinder and use it as an evaporator. If its empty and you just want to see it still runs and pumps, then you could put some nitrogen in and pump that round, just keep an eye on the pressures.
    Mostly found in Oxfordshire, UK :)

  3. #3
    Join Date
    Apr 2016
    Location
    New Zealand
    Posts
    7
    Rep Power
    0

    Re: How to test a stored "pumped down" condensing unit.

    You can ensure the suction is fully closed and run it.
    Before you do connect a low side gauge on it to see if the compressor pulls down to a vacuum.
    Should pull down to 25 inches and hold to be still good.

  4. #4
    Join Date
    Sep 2003
    Location
    ISRAEL
    Age
    65
    Posts
    4,106
    Rep Power
    37

    Re: How to test a stored "pumped down" condensing unit.

    If it was running ok before it was stopped, it will be fine now.

    Only check the fan motor.

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