EcoRenovator - View Single Post - 12V Digital LCD Thermostat Temperature Controller

Xringer · 03-08-12, 06:30 PM

I have not done a lot of brainstorming about the controls,
but I'm thinking that I might want the circulator pump to run,
only when the storage water is cooler than the HX,
And when the HX & the boiler temperatures are equal, the pump takes a break.
Thus giving the HX a chance to heat up a bit more, before the pump comes back on..

I think this function might be filled using my old C30 Solar HW controller.
http://i46.photobucket.com/albums/f147/Xringer/HWC.jpg

Whereas the compressor would be controlled by a new digital controller,
with it's temperature sensor embedded about half way up the boiler.
It would allow me to tweak the max water temp,
to best meet demand with the current weather conditions/basement temp.

I really like the features of the digital controller. Heating or cooling mode,
hysteresis (1 to 15 C) , 1 to 10 minute compressor time delay..
Seems like the idea compressor controller.. & not too expensive.

~~~

I'm not sure if I really want to go this route, because I'm thinking that a CAI board,
with a few temperature inputs and a couple of SSR outputs,
might be a much more flexible solution. Just a bit more complicated..

03-08-12, 06:30 PM	#5
Xringer Lex Parsimoniae Join Date: Feb 2009 Location: Woburn, MA Posts: 4,918 Thanks: 114 Thanked 250 Times in 230 Posts	I have not done a lot of brainstorming about the controls, but I'm thinking that I might want the circulator pump to run, only when the storage water is cooler than the HX, And when the HX & the boiler temperatures are equal, the pump takes a break. Thus giving the HX a chance to heat up a bit more, before the pump comes back on.. I think this function might be filled using my old C30 Solar HW controller. http://i46.photobucket.com/albums/f147/Xringer/HWC.jpg Whereas the compressor would be controlled by a new digital controller, with it's temperature sensor embedded about half way up the boiler. It would allow me to tweak the max water temp, to best meet demand with the current weather conditions/basement temp. I really like the features of the digital controller. Heating or cooling mode, hysteresis (1 to 15 C) , 1 to 10 minute compressor time delay.. Seems like the idea compressor controller.. & not too expensive. ~~~ I'm not sure if I really want to go this route, because I'm thinking that a CAI board, with a few temperature inputs and a couple of SSR outputs, might be a much more flexible solution. Just a bit more complicated.. __________________ My hobby is installing & trying to repair mini-splits EPA 608 Type 1 Technician Certification ~ 5 lbs or less..