Recent content by Endless Flow

Here's imagery of the valves and pumps.

Requested.

Hello again: I posted about the spa project several years ago. The heating aspect has been a big success. I'd hoped to get at least 15KW of heat into the spa; we actually got 24KW into the 2000 gallon spa, yippie. But getting the solarium installed has been a major roadblock. The original...

I'd suggest you read Article 680 of the NEC on grounding and the equalpotential grid around your pool. Mike Holt is a good place to start. It's not expensive to comply before you pour concrete, but afterwards......

Here's an update to our saga. I chose the Grundfos Magna 3 circulator for the project. It feeds the Bowman heat exchanger from the geosource heat pump tank. A Pentair i2 then circulates spa [an Endless Pool E7000, 2000 gal.] water through the Bowman EC160 and back to the spa. Both pumps are on...

So we successfully built a microcontroller system to run the Pentair i2 pumps for the heat exchanger on the swim spa. Here But we need a higher input temp than the Pentairs can handle. Anyone here have experience with a steel/cast iron circulator pump of another ilk that has RS-485 control? I...

And cost a fortune to run. Better work up the running costs before going any further.

We're well on our way on our project. Tommy & I found 90% of the pump protocol posted and he sniffed out the missing parts with the pump we sent him. He can stop, start, vary speed, read all the alarms, etc. We're now building the hardware. There is a om13088 dev board from NXP & a custom made...

And that is the most important point. Clean sheet design helps avoid gotchas. I appreciate your experience and reassurances on the issue. As for the pump choice, the client already has 3 Intelliflo's for his koi pond so that's an incentive to stay the course. I'll read the Sonoff link, but I'm...

Variable Speed Drives have gotten cheap enough that many machinist hobbyists have been using them to upgrade old mills and lathes. Some have found that long runs at lower speeds do have overheating issues. The crux of the issue is the fans were designed to run at 1725 or 3450 RPM; their...

You would't want to..... They might think you are lunch. And the pond is not that large an area; it's ~14 ft. deep as they hibernate down there all winter.

Thank you! Those are great leads in my quest.

Thanks re: overheating concerns. As for the RS-485, there some useful writeups out in the world, and I have a friend who decodes protocols and embedded software as a profession and a hobby. He thinks it will be a good challenge.

I'm an engineer based Inside The Beltway. I'm working on several projects for a client&friend on Bainbridge Island, WA. This includes a spa, a 20,000 gal. koi pond, and many other non-H2O projects.

I am looking at the IntelliFlo VSF 011056 pumps but have a question. We plan to control the pump speed via their RS-485 link. They are TEFC (Totally Enclosed Fan Cooled) motors. When you run the pumps at lower speeds, their cooling fan also runs slower. Is there ever an issue with them...