Cecil, what kind of flow do you need for your cold water rig?
With the numbers you posted, and not really getting into details, you should be able to find a decent combo that will fill your needs and save you a few bucks in electricity.
The Yaskawa P7 is a pretty decent rig. Their newer offering is the P1000, and that has a bit of green stuff.
What Yaskawa did is marketed to the single to three phase agricultural world and you may see more of this brand in these applications. They also private label to other companies, so like the H2O Drive is actually a Yaskawa P7 wearing a different dress.
Saftronics was eaten by Emerson a while back and they stuck a few parts into the acquired Control Techniques rig's, which are the UniDrive's. They are on the
side.
Yaskawa is quite over priced for what you actually get tho.
For a well or aeration system that you set up to be stand alone, I would suggest the ABB ACS310 rig. You can remote tho.
If you want to sit in your house on a crappy day and have full control and monitor from your puter, without any more cost than networking, I would go with the PowerFlex 525.
