15-58 Pump ?? Hot-water

Ed_13

yes ken the boiler now had a hw coil and the house has 2 heating zones so i will add the new tank with a l4006a aquastat and a new sr502 zone control and remove the jumper on it so zone 1 will be priority. the 1 inch run to the tank is short and the boiler is way over sized for the house. another reason why i cant Waite to change it the buderus st150 is a 40gal tank that will be heated with a 151k btu wm boiler :-( but would like to buy the pump now and use it for the new boiler in the summer when they will have me back again. for a g1115 with 2107 control

Brian

Ed_13

hello wall i am piping a buderus st 150 tank to a wm boiler customer wants the hot-water heater in now and new boiler in the summer. now im not a engineer but am a tech will the 15-58 on high speed piped in one inch copper to the tank give me a taco 0010 or 008.

thank you

Brian

Ken_40

1558 what?

Not familiar with that model.

What make.

Better yet. Look at the performance curve of the 1558 and compare it to the PC of the Taco's. If it's close, use it.

Brad White_9

Grundfos UPS-15-58

a 3-speed circulator is what I think is meant.

The Taco 0010 is a high-flow/low head circulator so the total of flow and head needs to be known before we can help with more certainty. (I would not take a net comparison pump to pump unless the starting point were known.)

Grundfos has a cross-brand comparison guide on their web site. Good luck finding it though- The obvious stuff you need at your fingertips is not obvious on that site, at least to me.

Andrew Hagen always seems to post the right thing at the right time

Ken_40

Unlike Brad...

I'll tread where no one with brains might.

An 80-gallon I/W/H with almost ANY pump will do the job, especially given the size of the boiler and typical 180F avg. water temps. Given a 1" short run zone and minimal Cv of the HX. A 007 or the Grundfos 15-58 3-speed is probably fine.

As Brad suggests, High-Flow is overkill in this app.

Just don't forget you must have I/H/W priority controls, or - be extremely lucky (;-o)

Unknown

Try This

it`s there Brad, but you still have to "dig" for it.

Dave

Steverino

pump curves...

check out the attachment for the Grundfos (paste it to your desktop for future reference) Below is the Taco pumps curves:
http://www.taco-hvac.com/uploads/FileLibrary/00CurveChart.pdf

Ed_13

yes thanks brad the Grundfos UPS-15-58 with ifc i am just wondering i went to a trade show and have the chart from grundfos but wondering how the high speed can do 007 008 and 0010 maybe piping in 1 inch is 0010 3/4 is 008 and 1/2 is 007. i need at least 008 but 0010 would be fine for this indirect hot-water tank the supply and return manifold on this wm boiler is 1 inch. and pumps are on the return side. i cant Waite to take this boiler out and redo all the piping with a buderus g115 and pumps on supply. what a joke who ever put in this boiler long ago. and advice on the pump would be great thank you all

Brian

thanks

Unknown

Try this

it`s there Brad, but I admit you still have to "dig" to find it.

Dave

ALH_4

Links

I love links. ;-) The Grundfos site is fairly confusing. I wish they would make a separate site for the UP wet rotor circulators we love.

There really isn't a good match for the UP15-58 in the Taco line. Grundfos says 0010, but that is a pretty loose comparison IMO.

The competitor cross-reference is on page 4 of the UP Series Product Guide. It's a big file.

Or, better yet, compare the curves for yourself:

Taco Circulators

UP15-58FC

Ed_13

i think what i will do to be safe is keep the hot-water heater higher like 130F and use a 15-58 on medium that should give me a 008 and the customer will not see a drop in dhw temp. and keep it the same when i put in his g115-28 boiler

Joe Mattiello

The water heater manufacturer dictates the gpm required for the heater to run efficiently. The pressure drop through the coil is based on that flow required, so both gpm, and head should be labeled on the heater. If you have 1” piping, and circulator with an integral check valve the pressure drop through the rest of the piping should be minimal. Of course it would best to calculate it, but 1” pipe is very forgiving when calculating pressure losses. The 007 might work just fine, but I can’t categorically state that without knowing everything about the system. The Taco 0010 has a similar curve to the 007, both curves being flat, but the 0010 does have more capacity. If you arbitrarily select a circulator or a speed on a circulator without doing the math, you could have other issues, like erosion corrosion. For your reference I attached the submittal data information on the 0010, and the 007 circulators.