Building my shops infloor heat system

[fuelie74]

I have spent the last several months researching and now I pulled the trigger and started ordering stuff. I have almost everything and am starting to dry fit before final assembly. Hopefully tomorrow night my boiler will be in. I am looking forward to suggestions especially at this stage before sweet it all together.

Here is what I have so far. I am running two zones.

How should I be supporting the expansion tank?

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[anthony666]

shelf bracket

 

[koditten]

Need more info.

What boiler, how big of an area, insulation?

We love commenting, just need more to work with.

KO

 

[fuelie74]

Need more info.

What boiler, how big of an area, insulation?

We love commenting, just need more to work with.

KO

The building is 45x56x16 with R38 in the ceiling and R19 in the walls. 2 inch high density foam board under the slab and around the perimeter. Two zones. One zone is 420 sq with 2 - 250 ft loops and the second zone is 2100 sq with 12 - 250 ft loops. I have a Navien combi tankless boiler that should be in tonight or tomorrow.

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[koditten]

****!

I didn't even notice your question, I thought it was just part of your signature. I was sitting here thinking "shelf bracket?" Why did Tony post that?

anyways, on mine I used 2 shelf brackets, one on eash side. The plumbing is suspended by those clamp on pipe supports, a small threadded rod goes to each shelf bracket.

KO

 

[mygarageone]

If you look at the bottom of your air separator you notice a plug , that is where you should be installing your pressure tank. It doesn't have to go there but it should.
One other thing , I can not tell from the pic but your pumps should pump away from the boiler and your air purging valves should be on the return side of your loops.

 

[fuelie74]

Do I need or should I put a wye strainer in?

 

[fuelie74]

Got my boiler last night navien CH-210-LP-ASME.

 

[anthony666]

Do I need or should I put a wye strainer in?

you don't have to, not a terrible idea if you do though

 

[fuelie74]

Are the cool looking clear plastic ones ok are is it best to stay away from them and go with a brass one? Thought it would be nice having as sort of a sight glass.

 

[fuelie74]

I was told this gauge would be a good idea for monitoring the system. It has temperature and pressure. Where does it go in the system? I thought was that it should be right after the boiler but I don't really know. Also how should I mount it in the system with the long probe?

 

[anthony666]

a temp gauge going into the slab and one coming out is good so you can verify your net delta t .. at the boiler its not so vital .. you can feel it's hot

a pressure gauge is always a good call, i put it in the primary loop opposite the pump

 

[anthony666]

to install it put a tee in the pipe .. a few inches of copper pipe and an FIP .. make sure its horizontal so it's not an air trap

 

[mygarageone]

You should have a boiler operating temp gauge and gauges for the pex manifold too. You should be running a continues primary loop and then take your runs off from that .

 

[theoldwizard1]

I was told this gauge would be a good idea for monitoring the system. It has temperature and pressure. Where does it go in the system?

You need multiple temp gauges ! At least one at the beginning and end of each loop.

 

[fuelie74]

I have Blueridge SS manifolds and have temp gauges on inlet and return.

 

[Sureshot]

You will be fine with one temp gauge coming off the boiler but one on the return wouldn't hurt. You will want to have a temp gun to check the floor temp, individual lines, and general diagnostics and knowledge.

 

[mygarageone]

I am amazed by all this DIY knowledge out there .

 

[Highbeam]

Whatever you do, don't tighten that gauge by hand! Geez, they totally ruined that gauge with the warnings.

With a simple closed system using no primary/secondary you would need to know the temp in one place, going into the floor, but knowing before and after the boiler would be even better.

That gauge is fine but the temperature range is quite high for slab heat. Is there an option of a lower temp range like maybe 30-130?

Also, lower pressure like 0-50?

 

[Sureshot]

I find the return temp quite useful as well as that seems to be closer to the floor temp and tell you when things are "stable". Best to diary the numbers on startup and once it is running good then if you have a problem it will make the diagnostics easier.

 

[fuelie74]

Is it ok to put the pumps and the boiler on the second story directly above the manifolds that are on the first floor? Just thinking it would be best for the boiler to be away from the dust and grime.

 

[Dick in Wisconsin]

I am amazed by all this DIY knowledge out there .

It is pretty impressive, isn't it!