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Source for info on setting up boiler?

Sumboodie

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Any good books for help with boiler plumbing?

I understand the basics, but wanting good info on pump sizing, pipe sizing, best practices on component placing, etc.

I have 2 diesel fired boilers I've converted to burn used oil that I'm setting up in a connex that will feed hot water to the shop and eventually future house.

Shop has a floor heat system to ill put a heat exchanger. Used oil boilers as main heat (nearly free heat) and the existing nat gas mid/con boiler as backup. ($1500 a year for heat).

The boilers are 90mbtu, using 2 so have one as a primary and the 2nd to kick in if needed for more heat or can shut 1 down to clean, etc. I've actually ended up with 3, but don't expect I'd need that much output.
AFAIK that btu rating is easily changed (within reason) with how the gun fires too, so they can be like 150k btu... or 60k btu.

I've done alot of work on 2 systems over the years, but the layout was already there... like used 1" pipe on 1, the other was 1.25". No idea how that was calculated.
 
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fitter30

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90 million btu's 2.7 hp?Or a 150k btu's each. Only worked on a one used oil boiler. Boiler was 1.5 million btu for a large CAT dealer. Need to talk with the boiler manufacturer for minimum water temp, if needed a oil preheater. Also does the fire box need to changed for different nozzles and angle?
Piping of two boilers
www.caleffi.com/en-us/education
 
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Sumboodie

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90 million btu's 2.7 hp?Or a 150k btu's each. Only worked on a one used oil boiler. Boiler was 1.5 million btu for a large CAT dealer. Need to talk with the boiler manufacturer for minimum water temp, if needed a oil preheater. Also does the fire box need to changed for different nozzles and angle?
Piping of two boilers
www.caleffi.com/en-us/education
Sorry, M means thousand to me. As in mille English isn't my first language.

90,000 BTU
 

fitter30

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Are you heating just the shop floor? If there is more heat emitters what are they? What is the size of tubing, material, length of loops and number of loops?
 
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Sumboodie

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Are you heating just the shop floor? If there is more heat emitters what are they? What is the size of tubing, material, length of loops and number of loops?
Right now, yes. But later a house and possibly an outdoor apron (snow melt).
Typical to use 90-120k BTU boiler for a house. The ones I have were pulled from houses switching to natural gas.
 

fitter30

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Right now, yes. But later a house and possibly an outdoor apron (snow melt).
Typical to use 90-120k BTU boiler for a house. The ones I have were pulled from houses switching to natural gas .
Primary secondary loops will what you will want. With a micro bubbler air device and glycol has to made for boiler 30% for the inhibitor package. Have anything on floor heat post 10?
 

TurnipTruck

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I too referred you to the Caleffi site a few years ago. There is a tremendous amount of info there, but (for me anyway) it doesn’t stick until I have a specific problem to solve.
They have lots of pictures. Find an example that is close to what you are needing and go from there.
 
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Sumboodie

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I too referred you to the Caleffi site a few years ago. There is a tremendous amount of info there, but (for me anyway) it doesn’t stick until I have a specific problem to solve.
They have lots of pictures. Find an example that is close to what you are needing and go from there.
Don't remember that at all. I just got these boilers 2 summers ago, least I thought... hell might have been 2005 with how time goes by 🤣

I'll check on the Caleffi. Sister's husband does oil burner work, mentioned that brand recently.
Some sort of magnet filter they put on all their installs.
 
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Sumboodie

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Number is top right hand of each post.
You want a education here's a start
Oh, derr.

Was thinking it was a typo or term for some heating device.

1/2" pex, 4 loops I think (not home to check). No idea on length. I suspect possibly too long as seems like not enough loops for a 30x42, but it works fine and not like I can really fix it.


Idea was to tie into primary loop on the natural gas boiler with a heat exchanger and let it run like it does now, just it won't fire unless the water isn't hot enough, like if the used oil boilers didn't fire. I'd need some sort if delay where the t stat kicks the pumps for a bit before the boiler would be able to fire though.
To give time for the used oil boiler water to flow.

May add a heated apron out front too, I was figuring just treating it as a zone and it have last priority on a valve control.
 
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fitter30

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1/2" pex
Oh, derr.

Was thinking it was a typo or term for some heating device.

1/2" pex, 4 loops I think (not home to check). No idea on length. I suspect possibly too long as seems like not enough loops for a 30x42, but it works fine and not like I can really fix it.


Idea was to tie into primary loop on the natural gas boiler with a heat exchanger and let it run like it does now, just it won't fire unless the water isn't hot enough, like if the used oil boilers didn't fire. I'd need some sort if delay where the t stat kicks the pumps for a bit before the boiler would be able to fire though.
To give time for the used oil boiler water to flow.

May add a heated apron out front too, I was figuring just treating it as a zone and it have last priority on a valve control.
1/2" pex in radiate heat32 btu's per ft. 300 ' is max per loop x4= 1200' = 38,400 btu's
Snow melt tubing is install with centers of loops are closer together. Do you, kids or friends program? With a basic processor few temp sensors can write a program how ever you want it to work. Changes are a key stroke away and can alert you of a problem.
 
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Sumboodie

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1/2" pex

1/2" pex in radiate heat32 btu's per ft. 300 ' is max per loop x4= 1200' = 38,400 btu's
Snow melt tubing is install with centers of loops are closer together. Do you, kids or friends program? With a basic processor few temp sensors can write a program how ever you want it to work. Changes are a key stroke away and can alert you of a problem.
Alert doesn't help if no one is home though. Like right now it'd be ~12hrs and a $900 to get home.

300ft isn't a law. The guy could have made 500ft loops just as easy. I have no idea. I'm assuming they're longer as it likely should have 5-6 loops given the building size and tube spacing.

The oil boilers are higher probability to "lock out" due to the fact they burn dirty fuel.
Which is fine, but I need a backup.

Another approach would be to run the heat exchanger off the secondary loop and "ignore" the gas boiler. Use a 2nd thermostat ($$)
I'd need to still run the secondary loop pump too.

Made sense to me to just flow the heat through the gas boiler primary loop.
 
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