Circulator pump very hot
Comments
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Air bound? That is a water lubricated pump and the boiler water is inside that section of the pump, but the stator windings are between the water and the green metal case you are measuring the temperature of.
Or the pump is stuck and you are just melting the windings on there.
I'm guessing you have no heat on that zone?Edward Young Retired
After you make that expensive repair and you still have the same problem, What will you check next?
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not sure if air bound - any way to check that?EdTheHeaterMan said:Air bound? That is a water lubricated pump and the boiler water is inside that section of the pump, but the stator windings are between the water and the green metal case you are measuring the temperature of.
Or the pump is stuck and you are just melting the windings on there.
I'm guessing you have no heat on that zone?
Yes believe no heat in zone. I turned it off so hopefully stops the circulator running.0 -
Has it been running trouble and noise free recently?
take a pic from back aways. So we can see if there are valves you can use to isolate and purge, or remove the pump for serviceBob "hot rod" Rohr
trainer for Caleffi NA
Living the hydronic dream0 -
hot_rod said:Has it been running trouble and noise free recently?
take a pic from back aways. So we can see if there are valves you can use to isolate and purge, or remove the pump for service0 -
If every valve in that pic was turned iff you could remove the pump. Do so with the 4 bolts around the motor, 5/16” socket as I recall
There should be a shutoff directly below the purge valve. Unless Im missing something, I don’t see a way to purge these zones?Bob "hot rod" Rohr
trainer for Caleffi NA
Living the hydronic dream0 -
hot_rod said:If every valve in that pic was turned iff you could remove the pump. Do so with the 4 bolts around the motor, 5/16” socket as I recall
There should be a shutoff directly below the purge valve. Unless Im missing something, I don’t see a way to purge these zones?0 -
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Thanks!hot_rod said:The cost of a replacement cartridge may be as much or more than a complete new pump
Shop for a new 007, or comparable replacement0 -
Take an amp reading to see if the pump is running at or below name plate amps. That will tell what’s going on with pump. Pumps do run hotJoe Mattiello
N. E. Regional Manger, Commercial Products
Taco Comfort Solutions0 -
Are these both radiant zones?
Is there a radiant manifold?
If it's radiant, and the other zone is radiant, is it possible the "hot" circulator was replaced in the past with a 007 that was readily available, and not the correct circulator? If both zones have the same flow rates and head, the zone 2 circulator looks like maybe a 0010.
Zone 2 is also putting out 140°. High if radiant.0 -
Yes zone 2 putting out 140 on purpose - it goes to a room that is very cold so I bumped it up a little since we are going through a cold snap. Will move it down next week when temps go back to 30's (we are getting sustained single digit temps in Northern NJ now).HVACNUT said:Are these both radiant zones?
Is there a radiant manifold?
If it's radiant, and the other zone is radiant, is it possible the "hot" circulator was replaced in the past with a 007 that was readily available, and not the correct circulator? If both zones have the same flow rates and head, the zone 2 circulator looks like maybe a 0010.
Zone 2 is also putting out 140°. High if radiant.0 -
Maybe the mixing valve under the circ is bad, resulting in no flow to the circ?All Steamed Up, Inc.
Towson, MD, USA
Steam, Vapor & Hot-Water Heating Specialists
Oil & Gas Burner Service
Consulting1 -
All - appreciate the comments - it turns out the pump was airlocked - fixed that and normal operations resumed!0
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I didnt remove it - my heating guy did the work. He hooked up some tubes to this special looking bucket and had some powered machine. I assume he circulated the water through the system somehow till he got the bubble out.MarkW66 said:How did you remove the airlock?
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EdTheHeaterMan said:
Air bound? That is a water lubricated pump and the boiler water is inside that section of the pump, but the stator windings are between the water and the green metal case you are measuring the temperature of.
Or the pump is stuck and you are just melting the windings on there.
I'm guessing you have no heat on that zone?
Nailed it!Edward Young Retired
After you make that expensive repair and you still have the same problem, What will you check next?
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