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    jasmarie1's Avatar
    jasmarie1 Posts: 57, Reputation: 0
    Junior Member
    		  
    #1

    Sep 13, 2010, 03:41 PM
    Precharge
    I bought a 3 year old heat pump its new never been use but it has 300 pounds of pressure in it could it be precharge with nitrogen or freon
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Sep 14, 2010, 03:31 PM

    Usually it is a refrigerant charge IF the charge it contains if from the factory. Usually R-22 or R-410A.
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