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[wrudoing]

My 6048 has been fired for two weeks now and another 009 bites the dust this will make the fourth one in a year. I have two pumps on the boiler,  last year i replaced one of them 3 times now the other one,  it has the electrical burning smell going on.  Are I the only one with this problem  HELP!!!

[rosewood]

have you ever checked voltage ?  even if it was undersized you wouldn't be burning up the motor.

[RSI]

Why are you running an 009? 008, 009 and 010 are really bad choices for OWB. An 007 will flow the same or more water in most setups as any of them.
If using taco, I would only consider 007, 0011 or 2400wb

[jon d]

I have had the impeller lockup twice on mine during start-up situations. I took pump apart and helped the pump rotate some then was ok. Taco pumps do not like the down time during the summer.. 

[MattyNH]

 Yeah Id have to agree with rosewood..A undersize pump wouldn't burn up...A undersize pump just wouldn't keep up with demand.. Sound like a electrical problem or something like that...Cheapest place Ive found for pumps is www.altheatsupply.com  esp for 011 pumps

[wrudoing]

Dealer recomended 009, and it has been sitting all summer, it's all warranty stuff still, I talked to the dealer this morning and he is replacing it with a different brand I have no idea what it will be yet. Will post later

[wrudoing]

Well the pump was stuck which burnt the motor up. He ended up putting another 009 on?? Water tested okay,  What i don't understand is the thing has been running non stop for 2 - 3 weeks now how does the pump get stuck when it's running i can see at start up after sitting all summer? Is there any maintance that should be done that I'm unaware of?

[Ridgekid]

As commented before TACO pumps don't like to sit. Before I knew that I put mine on a 2 hour/day timer over the summer.  Now I'm glad I did. (mine is a 007)

[willieG]

my taco is an 0011 this is year 11 and i shut it off in late april or june and turn it back on near the end of october..have never started it in the summer months and have never had a problem with it (yet) i do have a filter right after the pump to prevent my rads from plugging up and maybe that helps as less (junk) would be recirculated through the pump. could it be your pump is undersized and fails to move enough water and at times could be cavitating and causing overheating of the pump to the point that it is not being properly lubricated by the water?

[wrudoing]

The pump is 25' from the exchanger don't think it's overworked?  What is the difference between 009 and say the 011?  I'm thinking it's motor and pump sizes?  school me on this

[RSI]

[wrudoing]

Interesting, 009= 8GPM 35' head height what should your GPM flow be? I'm not lifting 35' maybee 10' max. One pump is actually higher than the exchanger. Looks like the 007 is a 20GPM and 11' head height.   Pros and cons on flow rates??

[RSI]

The head feet isn't how high you are lifting, it is the restriction in the line. The pipe, elbows, heat exchangers, etc give some head loss. The return water in the return pipe acts as a siphon so you aren't actually lifting the water at all after the air is out even if the house is way higher.
The head pressure loss gets higher as the flow rate increases so it is hard to calculate. An average forced air heat exchanger loses about 1/2 foot at 5 gpm and about  2-1/2 feet at 10 gpm.

[wrudoing]

See, thats why i don't have the right pumps because i had no idea what i needed,  looks like the dealer doesn't understand the differences either. I'm running 4 of these pumps,  they have only been lasting a few months anyway I'll start changing to 007 or 011 as they give up the ghost

[RSI]

I would switch to Grundfos 15-58 pumps. They are about the same price as an 007 and have a higher head pressure.