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Author Topic: Adding a second exchanger...  (Read 8153 times)

Dillon1630

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Adding a second exchanger...
« on: November 13, 2018, 07:39:21 AM »

My home is two stories with a basement.  I have two separate units heating my house, one in the basement, and one in the attic (2 stories away).  I currently have my heat exchanger in my basement unit which heats the majority of the house. I have the upstairs unit running with the fan only and it recirculates the air from downstairs to upstairs via the return air duct in the ceiling. This method is working ok, but doesn't provide for very even heat.  I was thinking of adding a second exchanger to the attic unit, but wasn't sure how far the pump would work without overstressing.  It would be about 25' vertical and 100' total loop added to my current loop which is about 80' total.  I know people run much longer loops, but not sure about the vertical run.  Any ideas?  Anyone else running this?  Thanks!
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tinfoilhat2020

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Re: Adding a second exchanger...
« Reply #1 on: November 13, 2018, 02:42:08 PM »

what size pump do you currently have?
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Dillon1630

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Re: Adding a second exchanger...
« Reply #2 on: November 13, 2018, 08:46:15 PM »

I have a Badger GPD 25-10SFC. It is rated at 30’ on speed III, but that’s all I know.
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E Yoder

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Re: Adding a second exchanger...
« Reply #3 on: November 14, 2018, 02:18:51 AM »

It should push it fine with that big pump.
You'll need to keep it the same size piping for the whole loop to keep flow rates up.
Also to purge the air out the first time you'll most likely need house water pressure teed in at the beginning of the loop near the water heater to help boost the pump. A ball valve on a line connecting domestic water and stove lines.
Once the air is out vertical makes no difference.
I would normally pump a main loop to the water heater, then a secondary with close tees to both the air handlers. Putting it all in one works too though.
« Last Edit: November 15, 2018, 04:07:00 AM by E Yoder »
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Dillon1630

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Re: Adding a second exchanger...
« Reply #4 on: November 14, 2018, 06:55:11 AM »

Thanks....again!
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RSI

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Re: Adding a second exchanger...
« Reply #5 on: November 14, 2018, 07:39:36 PM »

How does the elevation of the outdoor boiler compare to the heat exchanger in the attic?
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Dillon1630

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Re: Adding a second exchanger...
« Reply #6 on: November 15, 2018, 06:50:54 AM »

It is at the same level as the basement, so 25' below the attic.
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RSI

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Re: Adding a second exchanger...
« Reply #7 on: November 15, 2018, 08:22:32 PM »

With that much height you might need put a plate heat exchanger in and pressurize the lines to the attic.

Could try without first and see how well it works. I would probably set it up as a secondary Loop though so when it airlocks you don't lose flow to your entire system.
« Last Edit: November 27, 2018, 06:08:04 PM by RSI »
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Dillon1630

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Re: Adding a second exchanger...
« Reply #8 on: November 27, 2018, 03:45:53 PM »

Thanks to Mr. Yoder, I got the second exchanger installed with no problem.  Tapping into the domestic water line was the key.  Makes a world of difference having both units blowing hot air now.  Too bad that I woke up to a stuck damper plate again this morning.  That is my one complaint about my G200....that damper plate being a constant maintenance item is a bad design.  I cleaned it like new to begin the season and it has already stuck.....it's hard to trust that thing unless you clean it once a week.
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RSI

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Re: Adding a second exchanger...
« Reply #9 on: November 27, 2018, 06:09:02 PM »

What is the mfg date of your G200?
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E Yoder

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Re: Adding a second exchanger...
« Reply #10 on: November 29, 2018, 12:59:05 AM »

That seems unusually often. I think we can get it to do better than that.
I'd notify your dealer first, and as RSI mentioned if we know the manufacture date we can troubleshoot more accurately.
« Last Edit: November 29, 2018, 01:38:14 AM by E Yoder »
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hoardac

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Re: Adding a second exchanger...
« Reply #11 on: November 29, 2018, 03:34:59 PM »

Yeah I had the damper problem they sent the fix to me and it has not stuck since.
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Dillon1630

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Re: Adding a second exchanger...
« Reply #12 on: November 29, 2018, 07:12:34 PM »

Build date was May, 2017.
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Dillon1630

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Re: Adding a second exchanger...
« Reply #13 on: December 13, 2018, 08:12:13 AM »

Just spoke with my dealer again about the damper plate issue and he said that after speaking with his rep, they advised that I extend the length of my flue pipe and put a cap on it.  He said that should fix the problem and if it did not they would move forward with sending a new air box.  He said they think it's getting too much down draft. Thoughts??
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E Yoder

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Re: Adding a second exchanger...
« Reply #14 on: December 14, 2018, 03:36:10 AM »

It makes sense that a taller chimney would put a slight vacuum on the unit at all times helping keep the smoke moving forward. It's worth a try and keep an eye on it.
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