Coupla hydronics questions

Jim_65

This is a dilema everyone faces everyday. Most contractors have the OO7 or 1558 on their trucks so that is what they tend to install. Even though the curve matches the 003 or 006. As you stated they only come in bronze and are quite pricey when you could install a cast iron in it's place.

Jim Franklin_2

I'm about to lay down the $$ for the circs and assorted parts. I wanted to run my flow calcs by the list to make sure I have it right, now that I have all the head loss numbers I'm ever going to get. My largest zone has 16,470 BTUH of baseboard. A 20 degree temp drop means about 2gpm, right? And 2gpm is enough flow through 3/4 pipe? Head for that zone at 2gpm is 5.9', so something like a Taco 006-IFC looks like the right circ?

Also, in some pics here I've seen the pipes held to the wall with a track that has moveable clamps that slide inside it. What's that?

thanks,
jim

Jim_65

Head

How did you determine that 5.9' head?

How many linear feet of 3/4" pipe and fittings are on that particular zone circuit?

You can go to B&G's website and run your numbers on the system syzer.

Jim Franklin_2

Here's what I have for piping and the numbers I used.

PEX - 170' @ .02' / foot
Pex 90 - 13 @ 7 equiv feet each
CU - 29' @ .0085' / foot
CU 90 - 8 @ 2 equiv feet each
CU 45 - 1 @ .75 equiv feet each

Total feet head 5.867265

The Taco curve chart says a 006 would be right for 2gpm but that only comes in bronze. The other 3 circuits need 003s. $172, bronze only, and 4-5 weeks.

Unless my numbers are wrong, I'll have to insert some fake resistance just to get the available circs (007s or super brutes) down to the flow I need, or lower the water temp, which will anger the toekick heater.

jim

Jed_2

Circs

Regarding circulators, 2006 will be very exiting,indeed, for the technological application you desire. How about ‡ variable!?

Jed

clammy

versa bar

The product you ask about has a few names usually kindorf or versa bar there are a variety of clamps some cheaper then others and are avabiale for steel ,copper or emt tubing .For copper tubing hydrosorb and i believe bee line make a fine insulated sleeve type clamp that avoids contact between the galv steel and the copper.The best thing about properly fasting everything up is that unless some one takes the time to screw it up it should be supported without sagging or vibration promblems for the home or buildings life .I see alot of unproperly supported piping ,pumps and mechinicals to make you sick ,do it right once it's way cheaper in the long run , if your local plumbering supply doesn't carry them try a refregeration supply house peace clammy

Doug Bird

006 Cast Iron Flanged

FYI, in 2004 Taco introduced Cast Iron flanged versions of the 006 just for jobs like yours. Many multi-zone hydronic loops, hydro-air and radiant injection mixing need small, low flow/low head pumps. So the 006 CI Flanged ,with or without the IFC Integral Flow Check, is an ideal choice. See attached Spec Sheets.

Doug Bird

006 Cast Iron Flanged

FYI, Taco introduced the Cast Iron Flanged 006 in 2004 just for jobs like yours. In many multi-zone hydronic loops, hydro-air and radiant injection mixing systems, the 006 has the right performance for the job. Check out the spec sheets attached.

Jim Franklin_2

Too big

Hi Doug...the 006 CI is nice, but still twice the flow I need for my largest zone. Are there plans to make a 003 in CI?

jim

Brian (Tankless)

I may be out of line, but

do your head calculations on these particular lengths of pex loops include all of the 180 deg' turns it has to make to form the 6" or 8" on centre spacing? Or just the cummulative head of pex in a straight line? I'm sure there is a difference.

If that has been taken into account, you may have to look for smaller circs.

Try www.laing-inc.com they have some VERY small circs.

There are others besides the very popular Grunfoss & Taco, you know.

Just trying to help here.

Regards and best of luck, Brian.

Have a wonderful New Year everyone.

EDIT: The Laing url is www.lainginc.com not the above.

Doug Bird

Hi Jim, according to your calcs, you needed 2 gpm @ 6' head. That matches up perfectly with the 006 curve. The 003 shut-off head is 4 feet and would not have enough head to deliver 2 gpm. Approx 1 gpm would be max flow a 003 would deliver with your system resistance curve.

Joe Mattiello_2

Taco 006, and 007

Doug Bird offered good advise, to consider the Taco 006 as a good candidate for your application. The 007 will also work of course it has a little more capacity then required, but again it comes down to availability, affordability, and overall good quality record.

Joe Mattiello
Technical Support Technician
Tel. 401-942-8000 X 484
Fax. 401-942-2360
joemat@taco-hvac.com

Jim Franklin_2

Not seeing it

On the attachment you sent, the 006-IFC (curve #2), 6' of head lines up perfectly with 4gpm. Am I looking at it wrong?

Interestingly, another file I got from Taco shows exactly what you say. I've attached it. Is 00-ifccurves out of date?

The 003 is what I need for the other 3 zones (2, 3, and 4 feet head).

Brian - this isn't for radiant heat, just runs between baseboards.

I looked into Liang. Right size, but $162 each plus freight from California. I'm sure that'll seem cheap in a few days. :-)

jim