Converting from R12 R22 R502

[vinic]

Is it possible/feasible to convert an evaporator from these older refrigerants to something newer, more earth friendly?

What all is involved for the conversion?

clyde

[chemi-cool]

If you only want to use the evaporator, check the size of the TEV and stick to the same tonnage, make sure you use it under the same conditions, i.e. if it was for + temp, use it for the same temp. have it flushed with a cleaner and you can use it for:

R12 > R134a medium, high temp

R502, R22 > R404a medium, low temp

Chemi

[shogun7]

Is it possible/feasible to convert an evaporator from these older refrigerants to something newer, more earth friendly?

What all is involved for the conversion?

clyde

System Modifications
The compositions of these refrigerants have
been selected to provide performance comparable
with the refrigerants they are replacing in terms of
both capacity and energy efficiency. As a result,
minimal system modifications are anticipated
with retrofitting. Suva® 404A (HP62) and Suva®
507 are near-azeotropes at most temperatures,
therefore the vapor composition in the refrigerant
cylinder is slightly different from the liquid composition.
This small difference will not affect
performance in direct expansion systems, but it
could affect performance in systems with flooded
evaporators.
For a complete read go here:
http://www.dupont.com/suva/na/usa/li...pdf/h75326.pdf

[Gonzalo Arias]

Dear VINIC
There are a series of videos of Copeland named Refrigerant change over, they show you step by step what to do.
Best regards