Posted By liveGeothermal on 13 May 2011 03:07 PM
Call your local munciple office and find out the rules about the mixing valve. In some areas it is manditory a mixing valve is installed.

Even in spring/fall which typically during daytime don't require heating and cooling still usually require it at night. Most people only use the hot water during night and in the morning. By shower time in the morning both tanks are hot for morning usage. During several field test with many different types of equipment. This has proven to reduce costs. Having both tanks in a loop helps the desuperheater provide both tanks with hot water not requiring the elements to turn on and maintain temperature. Most of the cost for hot water is the maintaining. Typically the furnace during the year runs much more often than using water. Also putting 2" of insulation board underneth the hot water tank helps from your concrete floor from leeching the heat out of the tank. Only part of the tank not insulated is the bottom.

Hope that helps some of u

Mixing valve only required in some municipalities if no other safeties are in stalled to prevent scalding, for example a control circuit in the heatpump which shuts off the circulation pump at 125 degrees. Again, you seem to lack a basic understanding how a desuperheater works. No, most people do not use hot water only at night, they usually sleep then. Yes, morning use is heavy, but also during the day for laundry, dishwashing etc. My heatpump was not running during the last 4 days, with your configuration I would not have had any hot water. And no, the heatloss is the least energy consumption, but heating up fresh 50 degree water to 125 degree uses the most energy. Your comments are simply plain wrong. You continue to give bad advise to people here. You should stop doing that.

Livegeo,
your advice and outrageous boasts of experience contradict one another and do not pass the smell test.
how are you suggesting you are heating hotwater with finish tank disabled and heat pump not running?
what you propose looks more like on demand hot water which is doable with geo, but a different (larger) heat exchanger (seperate from dsh). obviously we are confused when someone with 6 figure heat pump installation experience doesn't know this.
perhaps you have a photo of one of your installations in this configuration and the type of heat pump in use?

To all,
I grew up spelling "advice". I notice geome and doc use "advise". Both are in the dictionary. Is theirs an East coast thing or is mine a midwest thing?

J

OP, can you diagram piping from heat pump and diagram (or photo) circuit in between?
j

Posted By joe.ami on 15 May 2011 04:21 PM

I grew up spelling "advice". I notice geome and doc use "advise". Both are in the dictionary. Is theirs an East coast thing or is mine a midwest thing?

J

May it is something typical for Joe. He does it different, but it is still correct!....LOL

To all,
I grew up spelling "advice". I notice geome and doc use "advise". Both are in the dictionary. Is theirs an East coast thing or is mine a midwest thing?

J

"Advice" is a noun. "Advise" is a verb.

Posted By joe.ami on 15 May 2011 04:21 PM
I grew up spelling "advice". I notice geome and doc use "advise". Both are in the dictionary.

LoL - guess I've been advised to use advice. 

Police work in a previous life taught me vice is a noun and an adjective. Vise was just a noun.
j

Forgive my German heritage...as long as I don't mix up BTU and KW....

I have parallel rather than serial lives...in one of mine I'm a part time (mostly marine) cop. Down here, "advised" in police reporting lingo is a frequent substitute for "said" or "informed" or "told me".

OTOH, "advice" is the recommendations by others that I drink less beer, get more excercise, brush my teeth, obey the speed limit, tuck my shirt in, etc.

My advice would be to ignore what Livegeo advises for reasons well stated by others before me...the laws of physics and thermodynamics apply to everyone and are strictly enforced.

Forgive me for reopening an old thread.
Is there anything wrong with removing the two elements in the buffer tank and piping the dsh into the top and back out of the bottom one. It would seem that this would stratify the tank more, give the highest possible delta t and still leave room in the bottom of the tank for debris storage.

Also if you are removing the drain valve anyway, replace it with a full port valve and a hose bib adapter. This makes flushing the debris much easier and more effective.

That would work as well. Pump is going to mix not stratify.

Posted By joe.ami on 23 Jan 2014 09:44 AM
That would work as well. Pump is going to mix not stratify.

Thanks Joe
This is a setup I have used for solar and it works very well but I was not sure if maybe I was missing something from a geo point of view.

My solar tank stratifies quite nicely and I think it is because the pump draws out from the bottom and dumps back in horizontally at the upper portion rather then straight down from the top or forcing the hottest water all the way to the bottom with the dip tube.
It might also be the my solar has less flow/velocity then is required by the dsh as I don't know much about dsh.

Yes of course you are correct. Kinda day dreaming this morning, but pump does not automatically nix stratification though it can be employed (and plumbed) to mix