Mycom compaund compressor. How to select?

[Garri_Grom]

Dear Sirs

could you help me select compaund compressor (for example N2520) . I use mycom selection program and specify superheating temperature 5 K, subcooling in condenser (evaporativ VXC) 0 K.
My be I should to indicate other parametrs too?

Regards

[Thermo23]

[quote=Garri_Grom;206937]Dear Sirs

could you help me select compaund compressor (for example N2520) . I use mycom selection program and specify superheating temperature 5 K, subcooling in condenser (evaporativ VXC) 0 K.
My be I should to indicate other parametrs too?

Regards
My friend you need a lot more information like BHP and more loads.

[Garri_Grom]

Thermo23 thank you. I make not correct question.
Can You help me about follow situation:
We what to install compaund compressor N2520 it will be work -40(evaporation)/+35 (condensation). Q=397 kW. But some times (about half an year) we need only Q=200 kW.

I do not know how to do it more better:
1. frequency regulator for the motor 315 kW
2. multiplicator
3. or better to use Vi without 1 and 2.

In 1 variant i don understand what the main disadvantages and what power economy.

If possible could you help me?

[fullmatty]

has this been sorted out? I can size it for you if you require.