DHW Circuit
- Thread starter ewdudley
- Start date
-
Active since 1995, Hearth.com is THE place on the internet for free information and advice about wood stoves, pellet stoves and other energy saving equipment.
We strive to provide opinions, articles, discussions and history related to Hearth Products and in a more general sense, energy issues.
We promote the EFFICIENT, RESPONSIBLE, CLEAN and SAFE use of all fuels, whether renewable or fossil.
- Status
sgschwend
New Member
Yes the diverter valve could be any adjustable three-way thermostatic valve that is also suitable for diverter applications, e.g., TACO 5000 series or something cheaper if I can find it. I don't think Cv is a big deal here.
These are the differential delta-t thermostats I've googled-up so far:
http://www.fullgauge.com/index.asp
MicroSol ~$70
MicroSol II plus ~$80
Anasol ~$35
http://knapecontrols.com/solarheatingproducts.aspx :
http://knapecontrols.com/
And the DeltaSol line from ReSol.de
http://sssolar.com/html/body_controls.html
Which look nice, but the on-line prices at the Resol site are on the order of $250 for a $25 control. Whiskey Tango Foxtrot. So now I've found a new right-hand-side of the pricing spectrum, which now goes: racing expensive, boat racing expensive, sailboat racing expensive, save-the-earth-green-technology-expensive.
With either you can adjust the pump-on-delta-T and pump-off-delta-T, and I would guess that with a 10K thermistor and even an 8-bit A-to-D they should be good for better than one kelvin resolution assuming they picked a pull-up resistor in the right ballpark.
The top-of-the-line for both companies have differential-pair RS485 interfaces with yet another proprietary twisted-pair protocol to wade through, just in case a feller needed another little project to keep himself busy.
Cheers --ewd
These are the differential delta-t thermostats I've googled-up so far:
http://www.fullgauge.com/index.asp
MicroSol ~$70
MicroSol II plus ~$80
Anasol ~$35
http://knapecontrols.com/solarheatingproducts.aspx :
http://knapecontrols.com/
And the DeltaSol line from ReSol.de
http://sssolar.com/html/body_controls.html
Which look nice, but the on-line prices at the Resol site are on the order of $250 for a $25 control. Whiskey Tango Foxtrot. So now I've found a new right-hand-side of the pricing spectrum, which now goes: racing expensive, boat racing expensive, sailboat racing expensive, save-the-earth-green-technology-expensive.
With either you can adjust the pump-on-delta-T and pump-off-delta-T, and I would guess that with a 10K thermistor and even an 8-bit A-to-D they should be good for better than one kelvin resolution assuming they picked a pull-up resistor in the right ballpark.
The top-of-the-line for both companies have differential-pair RS485 interfaces with yet another proprietary twisted-pair protocol to wade through, just in case a feller needed another little project to keep himself busy.
Cheers --ewd
- Status
Similar threads
