DHW Project-Advice needed

DHW Project-Advice needed

PostBy: Kungur On: Sun Nov 27, 2011 2:48 pm

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
Kungur
 
Stove/Furnace Make: Keystoker
Stove/Furnace Model: K-2

Re: DHW Project-Advice needed

PostBy: lsayre On: Sun Nov 27, 2011 3:22 pm

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.
lsayre
 
Stoker Coal Boiler: AHS S130 Coal Gun
Coal Size/Type: Anthracite Pea
Other Heating: Resistance Boiler (It has been fixed!)

Re: DHW Project-Advice needed

PostBy: dh1200s On: Sun Nov 27, 2011 6:04 pm

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
dh1200s
 
Stoker Coal Boiler: Leisure Line WL-110
Hand Fed Coal Boiler: HS-Tarm 202
Hand Fed Coal Stove: Harman TLC 2000


Re: DHW Project-Advice needed

PostBy: gizmo On: Sun Nov 27, 2011 7:19 pm

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.
gizmo
 
Stoker Coal Boiler: AA-130
Coal Size/Type: Anthracite/Pea
Other Heating: NONE

Re: DHW Project-Advice needed

PostBy: Sting On: Sun Nov 27, 2011 8:06 pm

I Love Hot Water - so did the girls

Image


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

Image
Image
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then add one of these
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This works too -- posted previously by another
Image

Or you can do something creative:
Image

Kind Regards
Sting
Sting
 
Other Heating: BurnHAM=NG-gas

Re: DHW Project-Advice needed

PostBy: dh1200s On: Sun Nov 27, 2011 11:05 pm

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/product/REDINGT ... 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
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dh1200s
 
Stoker Coal Boiler: Leisure Line WL-110
Hand Fed Coal Boiler: HS-Tarm 202
Hand Fed Coal Stove: Harman TLC 2000

Re: DHW Project-Advice needed

PostBy: Poconoeagle On: Sun Nov 27, 2011 11:40 pm

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

one is taking off and the other is landing right? :D

some rocketry there!!
Poconoeagle
 
Stove/Furnace Make: Buckwalter & Co. , EFM520
Stove/Furnace Model: No. 28 Glenwood 1880, Alaska

Re: DHW Project-Advice needed

PostBy: Sting On: Mon Nov 28, 2011 11:13 pm

Its all good :D
Sting
 
Other Heating: BurnHAM=NG-gas