[RE-wrenches] Another pump quesiton

[Sindelar Solar]

This has been my experience as well, although I can't give such specific 
rationale as to why the El Sids failed - the electronics just usually 
and eventually fail in my battery-based hydronic system. The Marches 
just eventually wear out.

Allan

On 9/15/2020 9:57 PM, Howie Michaelson wrote:
> Dave,
> I used to use El Sids a lot in SHW systems with direct PV drive for 
> the glycol circulation.  I've long stopped installing SHW, but have 
> used them in off grid hydronic heat systems as well. The electronics 
> have failed on many of these pumps over the years.  They seem 
> particularly intolerant of higher voltages, even small ones, which if 
> they are being driven off battery voltage, is hard to avoid.  
> None-the-less while I really liked the El Sids, they were too 
> expensive to have as many failures as they did. I'm familiar with 
> March pumps as well, but they always seem to fail prematurely as well, 
> for even more money. I was hoping there might be a suitable 
> replacement for  a somewhat less expensive alternative.
> Howie
> *Howie Michaelson
> **Sun Catcher*
> *****/NABCEP Certified Solar PV Installer™
> /**
> **Solar Electric Systems Sales & Service
> 802-272-0004*
>
>
> On Tue, Sep 15, 2020 at 10:29 AM Dave Angelini Offgrid Solar 
> <offgridsolar at sti.net <mailto:offgridsolar at sti.net>> wrote:
>
>     Why did the El Sid fail? The one way I have seen them fail, and
>     any pump for that matter is rain water that has (for some reason)
>     lower than a normal PH. Below from wiki.
>
>     Normal, clean rain has a *pH* value of between 5.0 and 5.5, which
>     is slightly acidic. However, when rain combines with sulfur
>     dioxide or nitrogen oxides—produced from power plants and
>     automobiles—the rain becomes much more acidic. Typical acid rain
>     has a *pH* value of 4.0.
>
>       
>
>     *Dave Angelini Offgrid Solar "we go where powerlines don't"
>     http://members.sti.net/offgridsolar/ e-mail offgridsolar at sti.net
>     <mailto:offgridsolar at sti.net> text 209 813 0060*
>
>     On Mon, 14 Sep 2020 23:49:35 -0400, Howie Michaelson
>     <Howie.Michaelson at gmail.com <mailto:Howie.Michaelson at gmail.com>>
>     wrote:
>
>>     Hi All,
>>     I need to replace 3-5 El Sid pumps I'm using in a low volume
>>     hydronic heating system.  Other than laing pumps, are there any
>>     recommendations for 12, 24, or 48 vDC pumps?  Having magnetic
>>     drives that mate with the impeller body of the El Sids, would be
>>     a bonus.
>>     Thanks,
>>     Howie
>>     *Howie Michaelson
>>     **Sun Catcher*
>>     */NABCEP Certified Solar PV Installer™
>>     /**
>>     **Solar Electric Systems Sales & Service
>>     802-272-0004*
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-- 

*Allan Sindelar*
allan at sindelarsolar.com <mailto:allan at sindelarsolar.com>
NABCEP Certified PV Installation Professional
New Mexico EE98J Journeyman Electrician
Founder (Retired), Positive Energy, Inc.
*505 780-2738 cell*

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