DHW Project-Advice needed

I am attempting to set-up my KA-2 using a small pump to my DHW tank. When I planned this out I was thinking of using a line voltage aquastat to control the pump. Now as I get down to it I am confused.
How should I wire it? I think the pump should come on when the temp in the bottom of the tank has gone down to a certain temp. But how do I shut the put off?
Advice would be greatly appreciate.
Thanks,
Tom

The same aquastat that switches on at some low temperature to turn the pump on will also switch off at some higher temperature to turn the pump off. As Sting would say, an aquastat is only a switch.

Kungur wrote: I think the pump should come on when the temp in the bottom of the tank has gone down to a certain temp.

Tom,

I’m going to use the installed lower thermostat in my 50 Gal. Rheem Marathon water heater as in this thread. http://nepacrossroads.com/about19159-45.html Going to plumb it the same way when the LL110K boiler arrives.

Drop down to the post By: boilermaker On: Sat Feb 19, 2011 10:33 pm and see what you think……….Dick

I use a 50 gallon Electric water heater for my domestic hot
water off my AA130.I am running off the upper thermostat
because when I run off the lower one, the circulating pump
would always turn on the minute I used any hot water because
I add make up water into the bottom.With the top one controlling
the pump, I get a lot more hot water before the pump turns on
and mixes everything together.

I Love Hot Water - so did the girls




wire it like this - Your results may vary, but this worked in little place when I was hosting more showers than the minor league.






then add one of these



This works too -- posted previously by another


Or you can do something creative:


Kind Regards
Sting

gizmo wrote:I am running off the upper thermostat
because when I run off the lower one, the circulating pump
would always turn on the minute I used any hot water because
I add make up water into the bottom.With the top one controlling
the pump, I get a lot more hot water before the pump turns on
and mixes everything together.

Gizmo,

With your configuration does your cold water input go directly to the cold water input of your electric HWH?

I will leave myself open to yours and Stings set up. Boilermakers setup looked like a winner using the lower T-stat with incoming water being preheated by his sidearm setup. I was going to try that with the 110K once installed running the cold water source thru the 5GPM coil in the 110K on its way to the Rheem and having the lower T-Stat to sense/power on the cir. to charge the DHW tank until that lower T-Stat was satisfied at 120 deg. Using the lower T-Stat just seemed a very practical setup with his DHW plumbing configuration.

I have currently mounted http://www.grainger.com/Grainger/REDINGTON-AC-Quartz-Hour-Meter-3AB98?Pid=searchon both elements since the Rheem install. With six adults in the house slowing down the lower element hour meter is paramount. The usage meters will provide some feedback of the configuration.

I was going to leave the upper T-Stat/4.5Kw element in my Rheem powered on until I get some hands on with the 110K related to outfire. As I mentioned I’m waiting for a delivery date for the 110K so can’t speak from hands on. I’m passing along Boilermakers set up as a possible direction and I will try that configuration first. I will pass along an update once I get the 110K up and running.

Tom I hope you will post back what configuration you go with for your DHW generation and the results.

I’ll paste in a pic of Boilermakers setup so you don’t have to bounce back to the original post……Dick

Sting.... those last two pics.........

one is taking off and the other is landing right?

some rocketry there!!

Its all good