Heat Exchanger Pump for DHW

[McKraut]

This fall I am putting a heat exchanger on our DHW tank. What circulator pump would be appropriate for pumping tank water through the exchanger? The heat exchanger will be 4x12 20-plate and I assume that the pump will have to be brass. Any specific recommendations for the pump?

Thank you
Bob

 

[electrathon]

Taco 007 brass or stainless is a good

 

[peakbagger]

Ideally go with one of the modern ECM pumps in Bronze, they are much more efficient and most come with built in programming modes to match the pump to the use. My guess with heat exchanger is set it up for delta T operation.

 

[McKraut]

Taco 007 brass or stainless is a good

Thanks for the recommendation. Is this the specific pump I am looking for?

Thank you,

Bob

 

[McKraut]

Ideally go with one of the modern ECM pumps in Bronze, they are much more efficient and most come with built in programming modes to match the pump to the use. My guess with heat exchanger is set it up for delta T operation.

Thank you for the reply, but I have no idea what you are recommending. Do you have a specific model/manufacturer that would work?

Bob

 

[McKraut]

Ideally go with one of the modern ECM pumps in Bronze, they are much more efficient and most come with built in programming modes to match the pump to the use. My guess with heat exchanger is set it up for delta T operation.

 

[McKraut]

Is this what both of you (peakbagger and electrathon) are talking about? It looks like it would match both of your recommendations.

Thanks again,
Bob

 

[peakbagger]

The 007E shown above is my recomendation. It used far less power than the old fashioned 007. I doesnt have a "brain" but it does have a "eco mode" which matches the pump to the flow.

https://www.tacocomfort.com/documents/FileLibrary/SS_007e_iSheet_102-563.pdf

Costs more up front but since its probably running 24/7 the long term power savings should offset the cost.

 

[McKraut]

Then that's what I'm looking for! I don't mind paying more up front if it's worth it in the long run. Thanks to both of you for your help and recommendations. I appreciate it.

Bob

 

[peakbagger]

Just make sure you buy a the stainless version.

 

[electrathon]

Either bronze or stainless is good for drinking water. Make sure your pump comes with flanges, or order them when you order the pump. You will find them for less on eBay. I use a hydronic solar panel controller to cycle my pump, you will need something to turn it off and on.

 

[McKraut]

I will buy the stainless steel model. I am going to put a heat sensor on the tank (against the tank) and hook up to the Tekmar controller.

Thank you,
Bob

 

[maple1]

I use a B&G Ecocirc.

 

[McKraut]

Any benefit using the B&G Ecocirc over the Taco 007e?

Bob

 

[peakbagger]

My guess is its Ford/Chevy argument. Both good names that were dragged screaming and kicking into the Electronically Commutated Motor (ECM) world by European efficiency standards. Their old single speed products were not efficient enough to sell in Europe so they came out with ECM pumps and then started selling them in the US. The trade off is both have microprocessors that drive the motors so they have higher potential of being bad out of the box or getting zapped by a power surge.

 

[maple1]

Any benefit using the B&G Ecocirc over the Taco 007e?

Bob

Don't know. I know nothing about the Taco and not in a spot to Google it up right now. Maybe compare specs? But the local supplier could get me the B&G real quick and I liked what I read about it. 11 years later and it's still working as new. I liked the variable speed dial it has - just set the speed to what works and forget about it. Not sure if the Taco has that? Its tiny and uses next to no electricity.

 

[McKraut]

Thank you for your reply. I will look at this too. I need to decide sometime in the next week or two. It is getting colder outside and I know that I can't put it off for long.

Bob

 

[salecker]

Grunfoss makes a ECM type as well.Mine is going on 12 years,the rest of my pumps are at 13 years all Grundfoss

 

[McKraut]

OK, thanks. I still haven't gotten around to buying anything.

Bob