Outdoor Wood Furnace Info
All-Purpose OWF Discussions => Plumbing => Topic started by: U.P. Doug on August 31, 2014, 07:42:52 AM
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I am getting close to finishing my install and am ready to buy my pumps and could use some advise as to sizing them. I have a ridgewood 7500 and my loop to the house in 75' and it is Logstor. I have 25" of 1" copper in the basement going to a 20 plate exchanger for my Domestic water, then 10' of 1" copper to my water to air exchanger 15" by 20" then returning back to the logstor which is 30 more feet of 1" copper. I have eight 90 degree elbows in the loop and the plate exchanger and water to air are 1" feed brazetek units. I would like to put my pump inside as it is below the boiler.
My second loop is to my attached garage. 30' of Logstor, 4' of 1" copper to a Recycled Hydraulic oil cooler with 1 1/2 npt fittings in and out and two independent fans, then 4' back to the logstor. This pump will be on the boiler, with the garage exchanger at floor level.
Any advice would be appreciated! I am thinking Grundfos, just not sure of sizing.
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Are you going to put the plate exchanger on a separate loop or feed all the water on the house loop through it.
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I was planning on running all the water through one loop unless that is not a good idea.
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Simply that running all your boiler water through the domestic plate exchanger will increase the resistance and make the circ work harder, if it were me I would use a mono-flo tee in the main loop to supply the plate exchanger.
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That's why I am here Slim! That makes sense to me, I will do that on my basement loop. Any ideas on pumps with the momo- flo tee in place? Thanks for your help!
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I Think I would use the 26-99 three speed, if you put temp gauges on the supply and return, put the system under full load , check differential on the gauges, runt the circ just high enough that you have less than 20 degree differential
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Thanks Slim. I do have some commercial inline temp gauges that I was planning on installing. Would the same pump work in the garage loop, or is it to big for that one loop. The exchanger is big, about 18" by 38" but has separate fans and I intend to run only one of them to heat my garage with the ability to plug the second fan in if needed. Just looking to keep my insulated 26 by 36' garage around 50 degrees.
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Yes it will work just fine, the 3 speed will give you the ability to keep that Delta T below the 20 degrees
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Thanks again for your help!
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Anytime!
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Looking at Monoflo-tees and I see the 1" ones have a 3/4 outlet on them. Will 3/4 be enough to heat my domestic water without issues? I do see a 1 1/2 Monoflo with a 1" outlet and I could expand to 1 1/2 before the plate exchanger then reduce to 1" down line. Your thoughts?
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Slim designed my system and 3/4 is what my domestic is plumbed for
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Thanks sceptre74 ! I can get it on the way now.
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If I was installing the system, I would use a Grundfos 15-58 pump and put the plate in series with the water to air heat exchanger.
With the size and length of pipe you have and being a 20 plate you should have plenty of flow.
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So you think I should run through the plate exchanger, then to my water to air then back to boiler one loop? I read enough on here to know everyone has their way of doing it, and that is why I am here looking for options from people that know far more about this than I do. I do appreciate yours and anyone else's opinion.
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If you reduce to 3/4 then I would be concerned about flow to your rad as the plate starts to plug up.
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Do you know of anyone that makes a monoflo tee that is for 1" copper and has a 1" out to feed the plate exchanger. I searched the web, but had no luck other than the 1 1/2 option which has the 1" outlet. I am installing ball valves and boiler valves at both my plate exchanger and water to air which will allow me to flush them without having to disassemble anything.
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I think you are not understanding how a mono-flo tee works, it basically scoops a portion of the flow out of the main line and diverts it to another loop, look at it like forcing ghost flow to happen, this being said a 1 inch mono-flo all the way around will not work the way it is intended.
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Hey Slim, I do understand how it works from reading on line. Where I am confused is you said in an earlier post that reducing to 3/4 you would be concerned about reducing flow to my rad as my plate starts to build up. I would stay in the 1" line to my rad and the 3/4 from the mono-flo tee would go to my 20 plate exchanger then return to the main line downstream heading to my rad. I was just wanting to make sure that 3/4 was sufficient to feed my plate exchanger. Thanks!
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I think slim was referring to if you ran all your flow thru the plate, with the mono flo even if your plate starts to plug up, it shouldn't effect the rest of the system much.
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Sorry Doug, Mlappin is right, that was my thought
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Ok I understand what I need to do. Thanks for taking the time to help me set my system up. Its been a busy short summer here, but really did enjoy putting this boiler in and of course I had to expand the existing woodshed and improve it along the way, and keep telling my wife how this is saving money..... It did help when she saw that the propane pre buy is 2.09 a gallon up here this year, not going to miss that!
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You are not done yet, keep us all posted on your progress!