Taco Circulator Calculation

CC.Rob_2

http://www.taco-hvac.com/uploads/FileLibrary/SelectingCirculators.pdf

20 minutes in Excel and you're off to the races.

Bruce M

Taco Circulator Calculation

I have a 2 car garage that I am installing baseboard on a separate zone. There is a total of 65 ft of 1/2" piping running off of a VF series Thermodynamics oil-fired boiler. What are the calculations needed to select the correct 00 series Taco circulator?

Ted_9

copper fin

How many feet of copper fin? What size is it? Is it 3/4 copper fin? Is the 1/2" copper 65' one way or 65' round trip? How many fittings total?

I'm using a program and I'd like to see what other people get using other methods.

Massachusetts

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Bruce M

29 ft Baseboard

There is a total of 29ft of SlantFin 3/4" baseboard. The total pipe length supply and return including the baseboard is 65 ft. The total piping length minus the baseboard is 36 ft.

Bruce M

Taco is For Radiant Use

That pdf link to the Taco circulator document is for radiant heating use only. I need the information for baseboard.

Ted_9

Heat output

I added some copper fittings. I also went with 3/4 copper fin @ 550 btus per foot.

With a 006 you can use 29 feet of this copper fin and 1/2" copper. It will give you 11,000 btus an hour. Supply temp 180 and leaving the copper fin is 171 degrees. You loss about 5,000 btus because of the amount of copper fin using the 1/2" copper.
The 007 is too big and can be noisy and cause ware on the piping.

I don't know how readily available a Taco 006 is, but a Grundfos UPS15-58fc on speed 1 or a UPS15-42f on speed 1 will work too.
Massachusetts

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CC.Rob_2

it's generic

The sheet is from the radiant made easy application guide, but that's just a rebadging of a tech sheet that I understand has been around for a long time.

The information about flow calculation applies to hydronic circuits in general.

ALH_4

Taco

That Taco document will work for baseboard too. It looks like a very good explanation of head loss and circulator selection.

CC.Rob_2

how many fittings?

Ted, I can run this through my spreadsheet (based on the Taco tech doc) tonight, if you'd like a point of comparison. How many fittings and what kind did you add? Assuming also you have 1/2" pipe everwhere except the 3/4" fin-tube itself.

FWIW, my previous experience suggests that Siggy-ware and the spreadsheet methods are basically identical (any difference due to rounding errors) for simple piping like this.

Ted_9

yes,

as you guessed I used HDS. I used the following:
3/4 generic copper fin @550 btu's per foot
65' type m 1/2"
4- 90'
2-ball valves
4-reducing couplings

It's good to know if it's the same.
Massachusetts

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Joe Mattiello

Selection of pumps is based on load. load/delta T X EFF. =GPM. For your reference I attached two documents on selecting pumps, and reading pump curves. I also provided a link if you have a problem with the PDF files.


http://www.taco-hvac.com/en//en/products.html?view=AllFileList&current_category=170&selected_infotype=2&min_num=28&c_sort_order=

CC.Rob_3

ditto

For the flow anyway, which is what I can do. 006 or 15-58 on low.

Bruce M

More Information and correction

The system is piped totally in 3/4" copper. There is 29 ft of slant-Fin baseboard which has a rating of 610 Btu/hr. There are 11 90 degree elbows, 2 standard Tees, and a check valve. Total piping including baseboard is 65 ft. That 65 ft is measured from the boiler supply opening to the circulator. Is is best to measure from the boiler supply to the boiler return instead of just to the circulator?