Hi All

I would like to confirm if we can do the following:
- we have a condensing unit of around 30 kW cooling capacity for AC, in good shape, wich we want to convert to refrigeration for a cold room. The unit has 2 MANEUROPE MT64 and for AC it use to run with R22, with a centrifugal fan;
- as said before, we want to use it for -20ºC Cold room, with -25ºC evaporating temp with R22, making cooling capacity of compresssors 3,09 kW , total = 6,18 kW at those conditions;
- when we calculate a condensing unit to match the compressors duties at those conditions, the Condenser capacity, according with a manufacturer catalog, is 9,0 kW at 10 ºC DT;

- we think that we can use the old condensing unit wit a speed regulator conected to the centrifugal fan to lower the rpm- Question- can we do this?

or

- can we use that condensing unit with 1 new compressor with cooling capacity of 30 kW at -25 ºC?

Please help

Thank you