Replacement fo CO2 Bulk Tank refrigeration unit

[TXiceman]

The 400 series are merrily blends and will fractionate and also operate with a glide. For commerical applications, in tight systems they will work. R507 is a true azetrope and is more of an industrial refrigerant.

If you are having problems with the fins on the existing unit condenser, I would go ahead and repalve the condensing unit in total. Get a unit with the E-coated coil or hav it Heresite coated to minimize corrosion problems.

For a unit that is a bit better than the run of the mill commerical units and can be obtained with either a Bitzer or Copeland compressor and coated condenser coil, contact http://www.rae-corp.com

I have worked with both the 400 and 500 series refrigerants and do prefer the 500 series. R22 is scheduled for phase out on new equipment here in 2010 and as a service replacement in 2020. Where you run up on problems with R22 to R507 is the oils and elastomers in the compressors ( and in some the motor winding varnish).

Ken