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Old 01-25-2009, 07:21 AM   #1
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circulator pump <up flow or downflow?>


my circulatory pump looks to be on the return side of my boiler Yet it says upflow which would seem to be pushing instead of pulling.Its on the 1" line that runs all the way the length of the house.Is this a feed line or return line >the other side of the boiler is a one inch line out of the boiler going into 4,1/2inch lines. ive sent pics .
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circulator pump <up flow or downflow?>-boiler2-007.jpg   circulator pump <up flow or downflow?>-boiler2-008.jpg   circulator pump <up flow or downflow?>-boiler2-009.jpg  

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Old 01-25-2009, 08:05 AM   #2
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circulator pump <up flow or downflow?>


The line going into the lower end of the boiler is a return line.

Which way does the arrow on the circ point. Up or down.

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Old 01-25-2009, 09:59 AM   #3
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circulator pump <up flow or downflow?>


i have a Weil Mclain boiler with the same pump setup the return line from the last baseboard is the supply to the pump into the boiler.it is possible the manufacturers don't want it on the HOT side of that 180F going out as supply from the top elbow there.
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Old 01-25-2009, 11:24 AM   #4
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circulator pump <up flow or downflow?>


Thanks.The arrow on the pump is pointing up or maybe counter clockwise. also when I shut one off my runs in the crawl my aqustat changed from 130 low 170 to 170 low 210,-I moved the aqustat setting down to 160 and now its back down to 130 170--the aqustat was setting on 180-Is this accruacy problem with the gage or aqustat-----Its a chilly 62 in here today. Wouldnt it be better for the pump to be on the push side insted of the pull side.MY runs are pretty long in the crawl

Last edited by drdon51; 01-25-2009 at 11:29 AM. Reason: more info
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Old 01-25-2009, 11:44 AM   #5
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circulator pump <up flow or downflow?>


It doesn't hurt for it to be on the return.
BUT, its installed for a reverse water flow through the boiler.
The return water should enter the bottom of the boiler.
Instead, you pulling water out of the return.

Either have the circ reinstalled to push into the boiler on the return side, or moved to the supply side and pulling from the boiler.

In its current setup, it actually lowers the boilers heat transfer efficiency.

Pulling away from the boiler, helps to remove micro air bubbles from the boiler.
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Old 01-25-2009, 12:28 PM   #6
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circulator pump <up flow or downflow?>


Thanks beenthere .this system was installed in 2000 unbelievable--So the easiest way is--------------- to get a cir. pump that rotates clockwise is this correct-------------But the most desirable way would be to just move the pump to output side of the boiler.I think I really got screwed by ARS on the install $3,500 for a boiler way over sized 140,ooo btu input 1500 sq ft house, upteen service calls for air in the lines<while under its 5yr warranty> and a circulating pump installed backwards all leading to $400 gas bills--------what do you think about pump size.Ive got a lot of long runs in my crawl one one sixty footer and one forty foot.I think this whole job was FUBAR-
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Old 01-25-2009, 01:42 PM   #7
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circulator pump <up flow or downflow?>


First, make sure your not just looking at teh motors rotation arrow.
There will be a direction arrow on teh side or back of the cast body.

If you can't se that arrow.

The flange end that is not belled is the discharge end.

Next, if that circ is installed wrong. It can be pulled out, spun 180 and reinstalled, and then it would be pumping in the right direction.

Is it a 3 speed pump, or a single speed.

If 3 speed, turn it to3 if its on 1 or 2.

" pipe is very restrictive.
And an undersized circ, will cause you to use more fuel, because its not able to get teh water to teh heating elecments, so the pipes lose heat to the crawlspace.

A Taco 0010 3 speed may be able to handle the head.
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Old 01-25-2009, 01:47 PM   #8
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circulator pump <up flow or downflow?>


Quote:
So the easiest way is--------------- to get a cir. pump that rotates clockwise is this correct
Ayuh,... A Pump is a Pump...

The pump housing should have an Arrow cast into it,...
In the line drawing above, that Arrow should be pointed Down...

If it's Not,...
Remove the Pump,+ turn it over.....
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Old 01-25-2009, 01:57 PM   #9
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circulator pump <up flow or downflow?>


tHANKS You can see the arrow around the center of the pump indicating counterclockwise and the pump also says TYPE -UP---Its single speed should I get a three speed.
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Old 01-25-2009, 02:02 PM   #10
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circulator pump <up flow or downflow?>


Actually, it says type "U" "P". Not up.

The actual motor rotation doesn't indicate which way the water is flowing, as far as up or down.

That circ can also be used for horizontal flow.
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Old 01-25-2009, 02:03 PM   #11
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circulator pump <up flow or downflow?>


Sorry beenthere I went out and looked for the arrow on the cast and it is indeed pointing down--do you still think a 3 speed pump would help
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Old 01-25-2009, 02:34 PM   #12
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circulator pump <up flow or downflow?>


Probably.

If you have a good surface probe thermometer.
You can check your temp diff across the boiler.
At 140,000 input, you should have rough 11 gallons a minute flowing through the boiler.

Being that its over sized, your baseboard is probably not enough for that flow rate.
Your probably less then half of what it should be.
If you can get it closer to say 7 or 8 gallons a minute, with out having flow noise, you have a lower heating cost.

If you can get a accurate temp rise. Then using the output of the boiler, we can determine what your GPM is, and then tell if it should be resized, and what size circulator it should be.

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