Best Of
Re: Small Delta-T hydronic system
You said multiple times, and I quote, "Raising SWT and not changing flow rate does not change the delta", among several other avenues saying the same thing to imply that a given BTU output is impossible without a ridiculous amount of flow. That is false. You were/are wrong. Period. Now back to our scheduled program- sorry bauer, did not mean to get off topic.
GroundUp
Re: Proper Venting of 1” 1/4 Single Pipe Baseboard
If you run baseboard one pipe steam your going to have to try and pitch the baseboard inside the enclosure back to the valve. It would be better to make it two pipe and you can do this pretty easily even if there is no wet return near by. Run a 1/2" return off the baseboard and go through the floor down to the basement floor. Then elbow up and put a tee in the steam supply looking down and connect the baseboard return there.
Re: copper pipe feedback
we didn't dig in to that after we saw the piping. That appears to be the mcdonnall miller low water cutout and mercury pressuretrol from the old boiler. no idea why they are still there or if they're wired to anything. that mercury switch pressuretrol is probably more reliable than the new one.
the pressurtrol with the cover missing looks like the new one, the differential looks good, you can turn the main down some with the screw on the top but don't go too far or the linkage may fall off. if it doesn't restart when the pressure drops you may need to increase it a bit until it does. as long as it is set under about 2psig with the way the near boiler piping is any more fiddling with it is just rearranging the chairs on the titanic until the piping is fixed.
mattmia2
Re: Should a Magnetic dirt separator be added
I would like to see a dirt/mag on both sides of the HX. No harm having one on the loop field either.
If you plan on blending your glycol on site, here are the water specs from Dow.
Either consider buying pre-blended glycol, no mixing required, or purchase some DI water from a local treatment company. A 55 gallon plastic barrel is a good way to buy and haul water.
I have seen people loading up5 gallon containers at the water machines at Walmart, etc. I think those are large RO machines?
That is a substantial circ on the radiant manifold, what is the total GPM needed? What size is the manifold?
hot_rod
Re: copper pipe feedback
Thanks for the input. I just got an email from one of the techs at Crown/Velocity who thinks he might have some catalogs for the convectors and is digging around.
nycbones
Re: Radiant Heat. Should I raise the temp?
I would suggest getting completely rid of the mixing valve. And set up the ODR temp curve on the Noble boiler. When an indirect water heater call is made, the temp can go back to 180 or whatever you choose. I believe your boiler is capable of this, someone else here can confirm.
bjohnhy
Re: Small Delta-T hydronic system
Isn't the load the room and the heat loss of it, the radiators are the emitters, the the heat exchangers just like the boiler is.
Same with an indirect, the load is the cold gallons of water in the tank.
hot_rod
Re: Can you please critique this boiler setup that was installed in my house two wks ago
Don't fight with them yet if they are willing to come back. The first thing the judge will say is not how it was badly installed but did you give them a chance to fix it.
Re: Best way to clean a stainless steel heat exchanger (without removing)
I can't definitively say - it's likely buried under a slab. This coming summer I'm going to be replacing the last stretch of baseboard and also change the run, with hopes I've cut out the leak.
Robbi
Re: furnace over heating hi return temp
What's the return temp before & after the bypass ties in? That's a pretty big furnace, if just one zone closes you're going to be bypassing more than a bit of hot air. Is it a two-stage unit? Some zone control panels can stage down the unit, or just disable high heat.
You can also see about adding more minimum air to the zones, so you bypass less, too.
ratio