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    bobsampley's Avatar
    bobsampley Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Aug 6, 2012, 09:04 PM
    Can you put nu 22 into an r22 system without clensing the system ?
    I have a carrier roof top ac unit that runs r22 and I am wandering if I can put a pound or 2 in to top it off , without having to flush the complete system first? Can anyone answer that?
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Aug 6, 2012, 11:54 PM
    There is no such thing as topping off refrigerant!! The refrigerant in the unit is of a critical charge nature and must be done using all the proper tools and knowledge of a qualified service person or severe damage may result.
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