Cold and Hard Facts Refrigerants Q & A- March 16, 2023
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A: In some cases, you can continue to use the same
compressors, heat exchangers, valves and controls you
used before. It is always necessary to check if components
may need to be modified before they are ready for a new
refrigerant.
Check points may include:
• Oil and compressor approval for the new refrigerant. If not
replace with a compatible compressor,
• Components with gaskets must be compatible with the new
refrigerant and oils,
• Thermostatic expansion valves likely need to be adjusted or
even become replaced with a new version as it might need
a bulb charge that’s compatible with the new refrigerant to
allow good superheat control,
• Electronic expansion valve controllers may need new
refrigerant specific parameters. Set the new refrigerant in
the superheat controller for the electric expansion valve. If
the refrigerant is not in the list, use user-defined and input
parameters. Please note that Danfoss controllers already
include many of the lower-GWP refrigerants,
• Control devices like pressure switches might need to be
adjusted to the new refrigerant pressures.
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