maytagman
ArboristSite Lurker
Just wondering what brand and size of pumps you guys are running on your outdoor boilers.
OWB pump
- Thread starter maytagman
- Start date
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I'm 300 feet away so I went with the largest Taco pump they have (only had two sizes when I was buying. All the pumps I have for the floor heat are Grundfos. Never had a problem with either. I do not know the exact size.
rx7145
ArboristSite Guru
I have a Bell and gossett PL-36 on the boiler/shop loop and a taco 009 on the house loop. Have a B&G NFR-22 on the DHW tank. Also have a 007 on the boiler as a wrap around pump.
Scootermsp
ArboristSite Guru
Taco
Taco 009 on OWB, Taco 007 on wrap-around loop for HX
Taco 009 on OWB, Taco 007 on wrap-around loop for HX
Paso One
ArboristSite Member
One loop has Bell and Gosset NRF 22 the other loop has the 3 speed NRF36 both have 3/4 in and 3/4 pex out. The small one feeds a 5 port manifold the big one feeds a box heater and an old school bus heater.
I may change the small one to a 3 speed as well as I'm thinking I'm not pumping the water fast enough thru my 4 ft x 4 ft old roof top heat exchanger as it cools the return water too fast.
I may change the small one to a 3 speed as well as I'm thinking I'm not pumping the water fast enough thru my 4 ft x 4 ft old roof top heat exchanger as it cools the return water too fast.
zsteinmetz
ArboristSite Operative
What size would you guys go with for a 225 ft run to my house. Bell and gossett of some sort preffered. I think the nrf 22 would be too small.
Paso One
ArboristSite Member
What size hose would you be planning to use. my NRF 22 feeds two 1/2 loops approx 200ft each
I would recommend the NRF 36 which has a 40 GPM with 3/4 inch lines
My recomendation is based on nothing more than I have used both the 22 and the 36.
Next pump I will get will be the 45 so I personally know how that one performs..
rx7145
ArboristSite Guru
B&G PL-36 or 0011
Paso One
ArboristSite Member
Hi nx7145
Do you know what the diifferance between the PL 36 and the NRF 36 is???
What size lines do you have???
rx7145
ArboristSite Guru
No I don't know. I would need to look up the specs. The PL-36 is 20gpm at 20feet of head. The 0011 is about the same.
I have 1 inch pex and some 3/4 inch copper.
mtfallsmikey
Addicted to ArboristSite
Taco 009 for the 2 primary loops
Taco 007 for secondary loops (water to air HX's)
Only mistake I made, and one to watch out for is...if you are doing primary/secondary piping, use Taco IFC pumps (built-in check valve) to prevent ghost flow.
Isolation valve type pump flanges are a gift from above!
Taco 007 for secondary loops (water to air HX's)
Only mistake I made, and one to watch out for is...if you are doing primary/secondary piping, use Taco IFC pumps (built-in check valve) to prevent ghost flow.
Isolation valve type pump flanges are a gift from above!
Paso One
ArboristSite Member
Okay you got me what is Ghost Flow 
mtfallsmikey
Addicted to ArboristSite
Okay, here goes....ghost flow is unintended flow thru a branch of a hydronic circuit. It may be a single piece of baseboard with a leaking zone valve, etc. I did my piping from the OWB this way;
Primary loop: Pump at OWB pumps continuously thru loop into the house and back.
Secondary loop: Separate loop from the primary, which hot water flows thru the hydrocoil mounted on my furnace. This loop uses a separate circ. pump (Taco 007) which is powered up with the fan on the furnace at the same time on a call for heat by the t-stat.
Primary loop: Pump at OWB pumps continuously thru loop into the house and back.
Secondary loop: Separate loop from the primary, which hot water flows thru the hydrocoil mounted on my furnace. This loop uses a separate circ. pump (Taco 007) which is powered up with the fan on the furnace at the same time on a call for heat by the t-stat.
Paso One
ArboristSite Member
Okay great I understand that thought process. On your primary loop how far away are you from the boiler to the house.
That primary loop is an interesting way to bring the water to the house.
How many secondary loops do you have?
If more than one loop does each loop have its own circulater?
That primary loop is an interesting way to bring the water to the house.
How many secondary loops do you have?
If more than one loop does each loop have its own circulater?
mtfallsmikey
Addicted to ArboristSite
Length one way is around 70'. In a primary/secondary piping scheme, every "branch" would have its own circ., instead of pumping directly thru any type of HX, be it a hydrocoil, HX for domestic hot water, floor radiant, baseboard, etc. Get the book "Pumping Away" by Dan Holohan, www.heatinghelp.com. It explains the entire theory...in very easy to understand language.
maytagman
ArboristSite Lurker
are many of you guys running brass or stainless pumps?
kamhillbilly
ArboristSite Lurker
I am running 2 Grunfos 15-58 3speed my run to the house is about 140ft , to the garage is about 80ft. I am just running cast pumps in the off season I just put then on low speed and keep running.
maytagman
ArboristSite Lurker
So you let them run in the summer when you aren't heating?
