As my previous question about Ammonia refrigerator package "MYCOM" "N8B".
After I went to confirm customer application.
Their application is Temp control.
The control system will control numbers of solenoid valve to On/Off operation. Compressor motor run at full speed.

Our idea to apply inverter for this application,
We will open all solenoid valve.
And apply inverter to control motor speed.
Motor speed will be command from controller as multi-step (Speed range 800-1200 RPM as MYCOM advice).
The speed command signal are dry contacts which were connected to solenoid valves.
We expected this application will help customer to save energy.

Do you think It is OK?
If you have any, Please kindly advise?