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1

Plumbing / Re: Calculating head of water To air Heat Exchanger and Sidearm??

« on: January 05, 2017, 05:24:10 AM »

Yeah, I did alright on the Grundfos.  They had their "save 15% on anything you can fit in their Brown Paper Bag" sale going on!  Every little bit helps.  Thanks you for the responses, hopefully I'll know how the pump performs on Friday.  Little nervous about doing the initial fire up in this weather, had -17 below this AM.  Friday still looks awfully cold, if something doesn't work right, I may be in a heap of trouble!! 

2

Plumbing / Re: Calculating head of water To air Heat Exchanger and Sidearm??

« on: January 04, 2017, 09:37:18 PM »

RSI........I paid $98 at Menard for that pump two days ago.  They also had a Taco 007, but I liked the three speed option better.  Not sure how my system will perform yet, so I liked having the adjustability of the three speed.  They had some off brands with similar specs " hydrasmart" .  But they used even more juice at similar head and flow settings.  Thought I better stick with a brand I've heard of.  No Armstrong on their shelf.  Really liked what I've read about Taco "Bumblebee "  and the Grundfos alphas, but I assumed those were more for zoned systems, not single continuous loop.  More money too, but heck with what I've got into this install.......what's another hundred bucks!  15-58 was the best option on the shelf, would have had to order anything else.  If I don't get this thing runnig soon, the Wife will probably put my stove on Craigslist! 

3

Plumbing / Re: Calculating head of water To air Heat Exchanger and Sidearm??

« on: January 04, 2017, 01:35:39 PM »

Thanks for the suggestion,  I purchased a Grundfos 15-58 super brute three speed pump.  It was close to the requirements I think I need, and available in stock locally.  It met the gpm and head pressure ratings I think I need.  Time will tell.............  Thanks for the feedback guys.  RSI ..  Still selling those kits for the blower fan shut off?

4

Plumbing / Re: Calculating head of water To air Heat Exchanger and Sidearm??

« on: January 04, 2017, 12:11:48 PM »

Hey RSI, your Johhny on the Spot!  Thank you for the PDF, good info.  I guess the BTU's of this think are not as high as I was hoping.  Just was going off of what the place I bought it from told me over the phone.  Not sure what my GPM's are yet, as I have not been able to figure that part out yet.  I estimated the btu's required by using the output of the current forced air fuel oil furnace.  Tried to make my system as free flowing as I could after hours of reading how guys wish they had done it on this site.  I just want to get this thing running, hate to admit it, but it has been sitting on the slap for 13 months, and hasn't burned a stick of wood yet! Do you still sell those kits for the blower fan shut off with a aquastat to keep them from running if the fire goes out?  Still think I'd like to put one of those on.  Thanks again for the quick response!
 

5

Plumbing / Calculating head of water To air Heat Exchanger and Sidearm??

« on: January 04, 2017, 10:04:04 AM »

Wondering if anyone has a good estimate on head loss numbers for a 16x22 140,000 BTU water to air heat exchanger and a 48" copper sidearm water heater.  I am trying to narrow down my pump search, but I did not know how to factor in my heat exchangers for my head calculations.  I came up with 357 equivalent pipe length, and 15.2 ft. of head, but did not factor in my heat exchangers yet.  My system is 112' of 1-1/4" Rehau underground to stove, and all one inch copper in the house with long radius  90's used throughout.  Also, does anyone know approximately how to figure out the BTU's used by a standard copper 48" sidearm? Having a heck of a time finding that info.     Any help would be appreciated.