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1

Frequently Asked Questions / Re: Want to replace VFD with CSV setup...but have some questions

« on: August 23, 2022, 12:23:58 PM »

Okay, thanks...that's where I was confused then.  So no matter what, I will need a control box, correct?  So the pump will get wired directly to the control box and then the new pressure switch wiring connects to the control box as well?  Basically I am swapping a 'dumb' control box with less brains with the overly-complex Monodrive?

If I put a new pump in, should I put another 3-wire in or just use a 2-wire and simply not hook up the 2 other wires?

I'm sure I'm overcomplicating this but I'm trying to make sure I have all my ducks in a row.  The current pump is 12 years old so even if it's 'okay', I'm sure it won't last much longer with our rusty ground water.  I will likely replace the pump regardless so I'd like to know the best way to incorporate the CSV system ahead of time.  If I can go with a 2-wire pump and not need a control box at all then I will do that.  But if the 3-wire pumps are better for some reason, I will replace with the same, current pump and then add a new control box.

Thanks again for all the help!

2

Frequently Asked Questions / Re: Want to replace VFD with CSV setup...but have some questions

« on: August 23, 2022, 09:33:40 AM »

Thank you for the reply, Cary.

I'm a little bit more confused now though.  You say to replace the monodrive with a 'standard capacitor start 2HP control box'...does that mean that I still need a control box even though I want to switch to the CSV?  I thought I could do away with a controller all together, or have I overlooked something?  I was under the impression that I could purchase the full kit from you (CSV, tank, switch, etc) and slap that in, rip the controller off the wall, and be good to go?  Also, is there a way to confirm that my pump is a 100% a single phase motor?  Everything I've read talks about 3 wires for single phase...but mine has 4 going into the Monodrive as you can see in the photo...

I was finally able to speak with a local well guy this morning and he basically said the same thing...replace the Monodrive (as he has no idea when he could get one) with a basic control box and put a new pressure switch in, but he thinks I would need a much bigger pressure tank for it to work.

Finally, how would I go about confirming that A) my pump working properly still, and B) it is in fact a 1HP unit?

Thank you again for the assistance, I will place an order as soon as I know my pump is good!

3

Frequently Asked Questions / Want to replace VFD with CSV setup...but have some questions

« on: August 22, 2022, 04:11:29 PM »

Hi there,

Found this great product (and forum) after searching for Franklin Monodrive replacements.  I have just had my 2nd VFD fail (original Franklin unit and now this 'newer' Monodrive) after only 12 years total...so at this point I am refusing to purchase another one and would like to instead convert to a CSV setup.

My biggest question is in regards to the pump.  I unfortunately do not have any records as to what type of pump is in there now other than I do know it is a submersible style.  On the current, faulty Monodrive it shows the dipsticks for both the pump and motor as 1hp, so I'm going to assume that is correct since it worked perfect...before it died again.  I am also goin to assume that it is a 3-phase pump due to the VFD being installed in the first place...am I right in concluding that I will need a new, single-phase pump even if the current pump is still functional?  If so, what pump is recommended for a ~30ft deep well that is located directly beside the house (only an additional 30-ish feet from the well casing to the mechanical room).

I always had ~70psi which I would like to keep, and that is what the Monodrive was set at as well.  We have a fairly large (4 zone) in-ground irrigation system that ran fine with the current setup so I'm hoping nothing would need to change there.  The existing pressure tank appears to be okay, but I'm wondering if I should just bite the bullet and replace everything to start fresh.  At the end of the day it would still be cheaper than just a new VFD unit which is crazy.

Sorry for all the questions but being in Canada I need to be sure as to what I'm ordering as returning would not be cheap or easy.  I've read a ton of posts on this forum but everyone has their own specific scenarios...and I don't see much discussion regarding the pump side of things and what brands/models are being used.

Thank you very much in advance!  I've attached a couple pictures of my current setup for reference.