Grundfos 3 SQF-3 performance curves [RE-wrenches]

[Phil Undercuffler]

The key to understanding the second link (SQFlex performance by model)
is that the wattages given are NOT the recommended array size.  These
graphs are best used as a troubleshooting tool, in combination with the
CU200 controller.

The CU200 has a LED readout of wattage being used by the pump.  If you
know the lift, can provide a reliable power source, and can measure the
flow then you have all the tools you need to troubleshoot the system.

For instance, a 3 SQF-2 pump lifting water 300 feet and drawing 260
watts should pump at 2 gallons a minute.  Hook up a small 120v generator
or inverter to the pump, through the CU200.  Measure the flow.  If the
flow rate is about 2 gpm but the wattage is substantially higher, then
the rotor is binding or the lift/work is higher than expected.  If the
wattage and flow are within specs, then focus attention on the array,
wiring and connections.



------------------------------------------------------------
Please note new phone extension!

Phil Undercuffler
Technical Services Manager
Conergy, Inc.
1730 Camino Carlos Rey Suite 103
Santa Fe NM 87507 USA
Office | 505.473.3800 x4841
Fax | 505.473.3830
www.conergy.us

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-----Original Message-----
From: Kurt Albershardt [mailto:info at es-ee.com] 
Sent: Friday, June 15, 2007 1:16 PM
To: RE-wrenches at topica.com
Subject: Re: Grundfos 3 SQF-3 performance curves [RE-wrenches]


Allen Sindelar sent me a PDF this morning that appears to come from an
EU version of CAPS.  Conergy also sent me an updated model guide which
includes the 3SQF-3 data.  The guide only shows performance to 600 feet,
but after I mentioned the 200m curve on the EU version, Conergy verified
that their version of WinCAPS will size these up to 654 feet.

Topica didn't forward Alan's attachment (or even his email as far as I
can tell) so I've put both PDFs up:

<http://mail.es-ee.com/~info/Grundfos%203SQF-3%20curve.pdf>
<http://mail.es-ee.com/~info/Grundfos%20SQFlex%20performance%20by%20mode
l.pdf>




--On Friday, June 15, 2007 6:34 PM +0000 Jeff Oldham
<starpower4u at juno.com> wrote:

>
>
> Hi Kurt,
> I've been involved in a lot of these and have yet to see a failure,
they seem to be robust. Grundfos calls them a 20 year pump so it may be
a while before we really know!
> All of their charts show that no model tops 450' of total lift and
that 500' is maximum submersion. I too keep hearing of 600' max lift but
no charts show any data above 450.
> You can go to their web site and use the WebCAPS free software to get
detailed product info and performance data.
>
> -jeff mo


-- 
Kurt Albershardt
Eastern Sierra Energy Engineering
Reno, NV
775-853-1800










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