I will second that, Todd. I've had a Hartell MD-10-HEH mag drive pump
pumping glycol in my SHW closed loop for 23 years direct powered by a 20
watt PV. It does make a little noise when your close to it...so be it.
Bill
Feather River Solar Electric
Bill Battagin, Owner
4291 Nelson St.
Taylor
I have had exceptional experience using Hartel brand brushless DC
circulation pumps on my home's solar hot water system.
Todd
On September 17, 2020 11:06:33 AM Christopher Warfel
wrote:
I would look at the pump that Thermodynamics LTD of Canada sells. Pretty
bullet proof in my experience of
I would look at the pump that Thermodynamics LTD of Canada sells.
Pretty bullet proof in my experience of 20 years of installing their
products. Don't deal with the people in VT. Call the business in
Dartmouth Nova Scotia, eh? Laing are expensive but very reliable.
March is not great for sm
Anyone have any recommendations as to other products like the scala2?
Thx
Jay
> On Sep 17, 2020, at 10:07 AM, Ray wrote:
>
>
> I've definitely had some Grundfos failures from the way back days, but their
> Alpha ECM circulator series has been really solid, as well as Taco's ECM
> drive circ
I've definitely had some Grundfos failures from the way back days, but
their Alpha ECM circulator series has been really solid, as well as
Taco's ECM drive circulators. To be clear ECM is variable speed drive
VSD, but not variable frequency drive VFD. ECM varies DC voltage to a DC
motor to var
Certainly willing to look at those - I'd be happy to not mess with DC
converters and voltage spike issues.
Any specific models you'd suggest to replace El Sids in low head situations?
Howie
Howie Michaelson
Sun Catcher
NABCEP Certified Solar PV Installer™
Solar Electric & Heat Pumps Systems Sales &
Look at the recent Grundfos Scala2 recall, they have sold some really
bad pumps, so AC is not always best. For Offgrid a spare inverter is often
called for because critical systems do need back-up. Many
applications/requirements are different. Grundfos scala2 pump recall
They have been RECAL
Actually best of all: you don't have to run low voltage DC circuits to
the pump room. Another thing about the ECM drive pumps, they have much
higher flow rates available than the El Cids. And if you're worried
about your old school street cred in the off grid world, they are still
technicall
I have El-cids in stock & am selling them off.
I have switched to the new AC technology that Grundfoss & TACO offer. They are
called ECM pumps. Electronically Commutated Pump motors. AC-DC motors, soft
start, variable speed, super-efficient, best of all very QUIET!
Dana Orzel
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