Primary/secondary

Broco4

Hello, I just had a radiant system
 installed for my warehouse. I know plumbing but not a heating specialist. I would like to know your opinion on this installation. I am disappointed with the choice of materials and it seems to me that the configuration of the primary and secondary loop is not correct. Are the "T's" well placed?

EBEBRATT-Ed

I would be pretty happy with that looks like someone did a decent job from what I can see. The tees are fine

Ironman

8 diameters of straight pipe going into the Tees and 4 diameters of straight pipe coming out is optimal.
Yours looks pretty close and should work fine.
I would have used an MBR (SpiroVent) instead of the air scoop.

JUGHNE

Your pipe fitter must have a lot of confidence in his assembly. I see no union other than the pump flanges and I would guess each manifold has a union connection.

Me, being nervous Nellie, would have thrown a couple of unions in the black pipe.

mjstraw

Circs wired with lamp cord?  At second glance looks like romex.  I'd use MC.

Colorado_Dave

It's not wrong to use black iron, but I hope they put an inhibitor in the system.   I would have done copper myself.  However, the layout and design doesn't look out of sorts.

It looks like a single zone system which could have been piped as a single pump system (quiet for a second, I adore P/S piping)... but it could have been done with a single pump with a properly sized bypass to keep boiler flow up, but primary/ secondary is a great choice for keeping your flow rate where you need it.

I would have supported the expansion tank using an Holdrite QS-U bracket because that black nipple will snap like a twig without the aforementioned inhibitor in a few years. 

I agree with a previous poster that I would have had a couple extra unions for serviceability and would have used an air separator like Spirovent or Honeywell SuperVent.

I also would have skipped the auto feeder.  If you have a leak, it's 4.6 gallon capacity isn't going to get you too far especially for the cost.... but some locations require it. 

psb75

The TPR valve under the boiler doesn't look "Kosher" with two 90's on it. Just sayin'.
I also agree about supporting the x-tank properly...for when it fails.

hot_rod

I would also like to see a better air separator. Those scoop type never get the micro-bubbles and entrained air out 100%.
And with all the steel piping you may get some magnetite formation. A high efficiency multi-purpose device like this would be sweet.
Micro bubble air removal, dirt separation and magnetic separation.

Ironman

hot_rod said:

I would also like to see a better air separator. Those scoop type never get the micro-bubbles and entrained air out 100%. And with all the steel piping you may get some magnetite formation. A high efficiency multi-purpose device like this would be sweet. Micro bubble air removal, dirt separation and magnetic separation.

Bob, what’s the catalog number for that?

STEVEusaPA

@Ironman https://supplyhouse.com/sh/control/search/~SEARCH_STRING=caleffi dirtmag

CMadatMe

Piping is fine. Would copper have been better, yes. Using a good hydronic system cleaner during yearly service will assist in the longevity. What I hate and it's a thorn for me, is the expansion tank/air elimination on the system (secondary) side. I will go to my grave with the proper placement being on the primary return side. You're still pumping away and are providing protection of the boilers heat exchanger. In any pri/sec piping arrangement velocity slows at those closely spaced tee's or a Low Loss header and that's the point most susceptible to air coming out of solution.