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Posted by Solar Flare on November 3, 2006, 12:20 am
 
Which diff thermostat model did you order?



Posted by Gary on November 3, 2006, 1:49 am
 
Solar Flare wrote:

Nothing very exciting.
I got the old standby Goldline GL30

I looked at several others that had more bells and whistles, including some nice
logging and reporting features, but decided in the end that Goldlines long track
record for a reliable product was more important. If you got just the wrong kind
of controller failure, your collectors might be in danger of freezing.

I have a logger to track performance, so extra reporting features on the
controller would just be icing on the cake.

Gary



www.BuildItSolar.com
gary@BuildItSolar.com
"Build It Yourself" Solar Projects









Posted by Solar Flare on November 3, 2006, 2:19 am
 I got the Steca 301 and it works well with built in temperatures at
three locations (two used). It does not have adjustable differential
though. It has freeze protection but I do not use that (yet). It makes
no sense to do that on a drain down system, that I can see???

The Steca site displays a new model that will vary pump speed. They
report it will not be in N.America for another 6 to 8 months. I am
waiting for that one to appear as my pumps draws over 150W and it may
cut back on power after the initial water lift.



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