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16
Plumbing / Re: Question about my new system (is it designed well)
« on: September 19, 2019, 01:20:16 PM »
Excellent thank you. I will collect parts and set it up that way next summer.
17
Plumbing / Re: Question about my new system (is it designed well)
« on: September 13, 2019, 06:41:47 AM »
Wreckit, thanks for explaining why. Makes perfect sense that sediment would build up. So it is ok that the DHW HX and the furnace are in the primary water loop and you would just use a heat exchanger to isolate the floor loop system? What type of heat exchanger would you recommend? So what I think you are saying is the floor HX would be last and it would have constant flow through it on the primary loop side and then the secondary side would be pressurized closed loop with probably the same pump I am using now turning on and off based on calling for heat, with the existing mixing valve limiting the temperature going into the floor.
Is the clogging something that can happen in just a season of operation? I flushed all of the lines until the water was clean by hooking a hose to the manifold and opening one loop at a time just to see how they flowed before I blew them out with air and pressure tested them. All seemed well so far, heating season is closing in and what I am asking is can I wait until next summer to set that up properly
Is the clogging something that can happen in just a season of operation? I flushed all of the lines until the water was clean by hooking a hose to the manifold and opening one loop at a time just to see how they flowed before I blew them out with air and pressure tested them. All seemed well so far, heating season is closing in and what I am asking is can I wait until next summer to set that up properly
18
General Outdoor Furnace Discussion / Re: Repair of door mating surface question
« on: September 13, 2019, 06:31:36 AM »
Thanks for the replies. I found out a little more information, I was browsing craigslist and happened to see an OWB that looked exactly like mine but had "Johnson" branding. I thought maybe they bought out or took over the Cadillac brand so I found their website and called. https://johnsonoutdoorwoodfurnaces.com/index.html Howard the owner was very helpful and told me what actually happened is a former employee pretty much took the design and started making them on his own which is the Cadillac brand. In spite of that he was quite helpful.
He told me that yes both fans should run at the same time when the aquastat calls for heat, the second aquastat in the back should be set at 200 as a high temp cutout. Also that I am lucky mine was before the Cadillac brand ones switched to a digital controller because the one that was installed had a lot of failures and is no longer available. I believe the fans are 70cfm each. They are Dayton blowers with flaps over the inlet to block air when shut off. He also thought building the rusted spot up with weld and grinding it smooth would be the best approach. He has a fairly small operation, he said he builds about 75-80 units a year.
I will have to take some pictures.
He told me that yes both fans should run at the same time when the aquastat calls for heat, the second aquastat in the back should be set at 200 as a high temp cutout. Also that I am lucky mine was before the Cadillac brand ones switched to a digital controller because the one that was installed had a lot of failures and is no longer available. I believe the fans are 70cfm each. They are Dayton blowers with flaps over the inlet to block air when shut off. He also thought building the rusted spot up with weld and grinding it smooth would be the best approach. He has a fairly small operation, he said he builds about 75-80 units a year.
I will have to take some pictures.
19
Plumbing / Re: Question about my new system (is it designed well)
« on: September 12, 2019, 01:08:39 PM »
Another question I thought of. Some places I see mentioned that an open system is not good going straight to floor loops and should have an isolation HX. Why or why not? My boiler fill point is higher than any other point in the system if that matters.
20
Plumbing / Re: Question about my new system (is it designed well)
« on: September 12, 2019, 10:56:48 AM »
Thanks, I would have to redo piping to switch the order which I will probably do anyway because I don't like droopy pex tubing all over. How big of an impact do you think it would have? Worthwhile to switch it up now before heating season starts or leave it until next summer?
21
General Outdoor Furnace Discussion / Re: Repair of door mating surface question
« on: September 12, 2019, 10:54:39 AM »
No manuals or schematic on anything unfortunately. I will have to take some pictures, it seems like a very heavy duty unit I saw another one at someones house about 10 miles from me, I might have to stop by and see if he has a manual.
Thanks for the comment on welding, it's a pretty small area so i will break out the Hobart and see what I can do. Not sure why it corroded away there, is that typical if the door gasket is leaking or does it mean something else?
Thanks for the comment on welding, it's a pretty small area so i will break out the Hobart and see what I can do. Not sure why it corroded away there, is that typical if the door gasket is leaking or does it mean something else?
22
Plumbing / Question about my new system (is it designed well)
« on: September 12, 2019, 08:56:20 AM »
I'm looking for some opinions about the system at the house I just bought. I will try to describe it as best I can, correct me on wrong terminology as I am new to OWB but very excited to be using it soon. The house is a raised ranch about 1800 square feet, built in 2013 . 2x6 walls and good insulation in the attic so the heat loss shouldn't be horrible.
Boiler is a Cadillac 3600, On the back is a Taco 2400-WB pump (new I just bought it because the original pump was missing) It is pushing to the house.
underground is 1" pex that goes about 80' to the house.
Once in the house it is a primary secondary ( I think that is the right terminology) loop with close spaced T's.
First load is the basement floor which has a Grundfos pump 1/25hp (not sure the model) feeding 5 loops in the concrete floor (about 1800 square feet) There is a mixing valve so the temperature can be adjusted.
Second load is all flow through a plate HX which preheats potable water on it's way into a 40 gallon electric water heater.
Third load is all flow through 16x20 radiator in the furnace duct to heat the main floor (same 1800 square feet)
Fourth load was 3 loops in the garage floor but that has close spaced T's and the same pump like the basement has (I say it WAS the fourth load because all 3 loops leak down air pressure rapidly, I have not yet looked at it with a thermal camera to see where or how many leaks there are.)
From what I have read it would be ideal to have the basement floor loops come off the system after the potable HX and the furnace radiator because they don't need as hot of water anyway. Is that correct?
Any other thought from people with more experience about what is good or bad about my system?
Boiler is a Cadillac 3600, On the back is a Taco 2400-WB pump (new I just bought it because the original pump was missing) It is pushing to the house.
underground is 1" pex that goes about 80' to the house.
Once in the house it is a primary secondary ( I think that is the right terminology) loop with close spaced T's.
First load is the basement floor which has a Grundfos pump 1/25hp (not sure the model) feeding 5 loops in the concrete floor (about 1800 square feet) There is a mixing valve so the temperature can be adjusted.
Second load is all flow through a plate HX which preheats potable water on it's way into a 40 gallon electric water heater.
Third load is all flow through 16x20 radiator in the furnace duct to heat the main floor (same 1800 square feet)
Fourth load was 3 loops in the garage floor but that has close spaced T's and the same pump like the basement has (I say it WAS the fourth load because all 3 loops leak down air pressure rapidly, I have not yet looked at it with a thermal camera to see where or how many leaks there are.)
From what I have read it would be ideal to have the basement floor loops come off the system after the potable HX and the furnace radiator because they don't need as hot of water anyway. Is that correct?
Any other thought from people with more experience about what is good or bad about my system?
23
General Outdoor Furnace Discussion / Repair of door mating surface question
« on: September 12, 2019, 08:39:48 AM »
Hi, I bought a house with what I think is about a 6 year old Cadillac 3600 OWB. The one corner of the opening that the door gasket closes against is corroded and thin. I am guessing the door gasket had a leak which caused this but maybe someone else has a better idea.
My question is would there be any problem with building it back up by welding and grinding to get it back close to the original shape?
My other question is maybe a dumb one but there is a blower in the filling door and also one in the ash removal door down below that appears to blow air up through the grate. Are those supposed to run at the same time or staged? Any other boilers like that? The wiring looks to have been tinkered with and I want to make sure it is set up how it was supposed to be. The company closed down that was making them so I can't find much info.
My question is would there be any problem with building it back up by welding and grinding to get it back close to the original shape?
My other question is maybe a dumb one but there is a blower in the filling door and also one in the ash removal door down below that appears to blow air up through the grate. Are those supposed to run at the same time or staged? Any other boilers like that? The wiring looks to have been tinkered with and I want to make sure it is set up how it was supposed to be. The company closed down that was making them so I can't find much info.
24
Cadillac Outdoor Wood Furnaces / Re: Q&A
« on: September 12, 2019, 06:06:30 AM »
I know it is resurrecting an old post but I am checking in with a 3600 model Cadillac OWB. Hard to find much info on them as they were only made a few years as far as I can tell and not made anymore. Mine is I assume from around 2013-2014 because that is when my house was built. It seems like a sturdy unit but I have never had a wood boiler before so I am learning.
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