Hi,

We have a customer who have a new provision plant running on R407C. It has several freezer rooms on the same compressor and a fairly long pipe routing (40 meters), so the superheat is fairly high. I have measured discharge temperatures on the compressor top to 125°C (approx 260°F). How much higher is it inside the compressor?

What would be a good refrigerant substitute? R407F - will it have lower discharge temp? Same capacity?

What about R448A or R449A? How are discharge temp and capacity compared to R407C? Can the same expansion valves be used?

Any other alternatives, without having to change liquid and suction line?