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407c??
Green tech guy.
Supply company telling me you can add this on top of r-22, but most techs say it's a retrofit, any suggestions?
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Can be added with no TXV adjustment.
Here is another post that looks into this further.
http://hvac-talk.com/vbb/showthread....g-407C-and-R22
The primary function of the design engineer is to make things difficult for the fabricator and impossible for the serviceman.
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Positively not! You seem to be saying that you will mix the refrigerants.
The old refrigerant must be recovered and replaced with the new refrigerant.
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