Fw: Submersible Pump Advice [RE-wrenches]

[Phil Undercuffler]

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Hi all!

I wanted to chime in on this topic, although technically I'm still on
holiday--I'm borrowing the in-law's internet connection.  Forgive me for not
having access to my notes, however.  I'll wing it from memory.

The new PS series controllers give the Lorentz pumps much wider power and
voltage flexibility than ever before.  When in the development stages, we
were told the PS600 could have the ability to run from a 24v power source.
However, it was decided not to mention that in the literature, as it was
felt that it was impractical (from a wire size point of view) to design new
systems running the pump at that voltage.

That being said, as Bob mentioned we have used the PS600 controller on 24v
battery based systems to provide a solution where once there were none.  If
you can provide distances and existing wire sizes, we can work out expected
voltage drops.

And Todd, as I understand it the variable frequency drive of the SQ-E is the
worst of all worlds from an energy efficiency point of view.  The motor
draws nearly the same energy whether pumping at full volume or throttled
down to a trickle.  That seems a mighty high price to pay in order to
eliminate the pressure tank. I believe this was thoroughly discussed in this
forum about a year ago.   
 

Phil Undercuffler
Tech Services Manager, ext 238

Conergy, Inc. 

Our World is Full of Energy

888.396.6611 toll free
505.473.3800 phone
505.473.3830 fax
www.conergy.us

-----Original Message-----
From: Allan Sindelar [mailto:allan at positiveenergysolar.com] 
Sent: Monday, December 26, 2005 12:40 PM
To: RE-wrenches at topica.com
Cc: b.schmitt at conergy.us
Subject: Re: Fw: Submersible Pump Advice [RE-wrenches]

Darryl,
For PS600 info, see
http://www.conergy.us/PortalData/3/Resources//products/solar_pumps/pdf/ps-pu
mp-battery-models.pdf.
For general Lorentz (formerly ETA) specs go to
http://www.conergy.us/Desktopdefault.aspx/tabid-159/.

The specs suggest that it will work, at 122 watt-hours per hour (watts), and
71 gph (both at 300'), or 1.72 watts/gallon. The existing SunRise model 5218
specs at 180 watts and 1.5 gpm, or 2.0 watts per gallon. So it looks like it
will work.

This is new info for me. I don't think the original ETA controllers could do
as much lift at 24V, so we have had some SunRise installations with no good
replacement when they failed.

Hope this answers your question, Darryl.
Allan

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