Gary,
I've had trouble with the rubber sticking to the helical rotor in a
couple Lorentz pumps. Both were off for several months during the
winter because the cattle are gone. Seems like your Grundfos pump
situation is different.
Kent Osterberg
Blue Mountain Solar
Gary Gordon at SYV Solar wrote:
Kent,
It would only be off if the tanks were full. Why?
Gary
Gary,
Any chance that the pumping system is off during the winter?
Kent Osterberg
Blue Mountain Solar
Gary Gordon at SYV Solar wrote:
Wrenches,
More details on the Grundfos failures:
1st failure 11 SQF-2 w/ 204ft TDH
2nd failure 6
SQF-2 w/ 220ft. TDH
3rd failure
6 SQF-2 w/ 253ft. TDH
All controllers were displaying F3 failures,
there was voltage at the well head. Only one replaced so far and seems
to work fine.
Any ideas or similar problems?
Gary Gordon
Santa Ynez Valley
Solar
P. O. Box 688
Santa Ynez, CA 93460
805 688-1213
Doug,
Thanks for the feedback. I have to install the monoflo,
because it was purchased 2 summers ago, but the customer didn't have
the site work done to install the pump. This summer the site work was
finished and now the customer is ready to have the system installed, so
wish me luck!
DC Power is getting out of the pumping biz, so is Wholesale
solar up north, hopefully Solar Depot will remain in it. Our only other
option is to go through the plumbing supply houses.
I hear the bugs are being worked out of the Lorentz pump line,
anyone have any experience with them?
Mike Nelson
MD Electric & Solar
Gualala, Ca.
On Sat, Nov 6, 2010 at 7:45 AM, Doug Pratt
<dmpr...@sbcglobal.net> wrote:
Mike, from another
Mendo native, don’t do the Monoflo. DC Power is getting out of the
pumping biz, and we’re the only Monoflo distributor in the US. Our
experience with Monoflo hasn’t been good. We’ve seen a number of pump
failures recently, support from the manufacturer is pretty thin, and
troubleshooting in the field is poorly developed and documented.
Basically it’s… pump not working? Try plugging in a new controller.
Still not working? Plug in a new pump. Dealers don’t keep expensive
pumps on the shelf in case of breakdowns, so repairs usually end up
taking weeks. Not good for dealer/customer relations!
DC Power is getting
out of water pumping because we just don’t have the technical bandwidth
anymore. We’re being pressed so hard by the rapidly-expanding grid-tie
market that our tech support crew is getting loved to death. There’s no
time. I’m sorry to see it go, I found water pumping projects
challenging and interesting, but the tech cloning project has hit some
snags.
From a sales
perspective, the Grundfos SQ Flex was the best of the lot. We heard the
fewest problems from them, and those problems were usually on the
surface (the CU200 control).
Doug Pratt
DC Power Systems
I have also installed several Grundfos SQ
Flex submersible well pumps, and had trouble with them, primarily with
the control systems, the low water shut off sensor has failed on
several pumps, and the CU200 control boxes have failed. The pumps
themselves have held up so far, and seem to be very efficient. I wish
there were more solar direct well pump options, I've tried the ETA
pumps, the Sunpumps (which are great for low head, low flow) and am
about to try a Monoflow. Any other thoughts?
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