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
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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
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 :)
System ModificationsQuote:
Originally Posted by vinic
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. SuvaŽ 404A (HP62) and SuvaŽ
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
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