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Author Topic: quick question  (Read 3616 times)

gainerspot

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quick question
« on: October 03, 2014, 12:20:13 AM »
Can I T off from my logstor and run one line to DHW and the other to the Water to Air exchange, or does it need to be a single loop?

I have been using this formula to figure the head loss.  I cant seem to come up with any info on how to calculate for the heat exchanges.  Any info on this would be helpful. 

http://www.taco-hvac.com/uploads/FileLibrary/SelectingCirculators.pdf
« Last Edit: October 03, 2014, 03:00:39 AM by gainerspot »
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LittleJohn

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Re: quick question
« Reply #1 on: October 03, 2014, 06:35:49 AM »
A drawing or sketch would really help...

If you were using a FPHE, I would definately recommend put it in as a secondary loop, as they can have very high head pressures. 
Since water to air exchangers have less restrictions you may be able to put in primary loop, but I have never installed a water to air exchanger, so...
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lindnova

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Re: quick question
« Reply #2 on: October 03, 2014, 06:52:18 AM »
I have a 20 plate DHW flat plate and a 60 plate exchanger inline and no problems.  I did install valves and bypass for problems or maintenance.  On the 20 plate I leave the bypass valve partially open so some bypass can happen and prevent back pressure.
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Trint

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Re: quick question
« Reply #3 on: October 03, 2014, 10:19:32 AM »
Yes you can that how I have mine, just put a valve in the line to the dhw so you can control the flow between the two.
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CountryBoyJohn

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Re: quick question
« Reply #4 on: October 03, 2014, 01:01:48 PM »
Quote from: gainerspot on October 03, 2014, 12:20:13 AM
Can I T off from my logstor and run one line to DHW and the other to the Water to Air exchange, or does it need to be a single loop?

I have been using this formula to figure the head loss.  I cant seem to come up with any info on how to calculate for the heat exchanges.  Any info on this would be helpful. 

http://www.taco-hvac.com/uploads/FileLibrary/SelectingCirculators.pdf

That will only work if you have a pump on each run.
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