Best Of
Re: Radiator-Baseboard-Piping Complexities
You mentioned a 3800 btu/ hr. load in the new room?
3/4 pex at 4 gpm gets you 40,000 btu/hr.
Here is what a 3/4 pex loop 100' long, 4 ells 4 couplings, looks like.
So a good match for your radiator, with under 4 fps velocity, reasonable head.
If you know the exact length and how many fittings you will use. Go to the free calculator at ppi website, plug in actual numbers. Plastic Pipe Institute.
Here is an example of an engineered LVL fix. After the fact repair 😚
hot_rod
Re: Working only on Aux, but not on Heat?
Aux would use more electricity than heat if you had a heat pump installed. This looks like an electric resistance only system, so it doesn't matter whether its wired to come on with heat or aux, it will cost the same either way.
GGross
Re: Interesting and naive approach to building a copper radiator
Gotta love the workmanship.
Intplm.
Re: Water in basement from steam boiler need a fix
Hello steam1916,
Kind of vague, is your system actively loosing water ? So the boiler is leaking out of a hose and filled the sump pit and it then overflowed onto the basement floor ?
Are the valves closed all the way Red Arrows. Air Vents at the Yellow arrows. The Air vents close when steam gets to them.
109A_5
Re: Pilot light goes out in the middle of the night **SOLVED!**
the orifice and openings in the pilot burner, not the main burner, although it sounds like that pilot burner is under a decade old so unless there are chunks in your gas the orifice shouldn't be partly clogged
mattmia2
Re: Asking for advice for combi boiler replacement and hydronic system upgrades
Many papers written on the topic, and the founder of this site wrote a book about it. in essence when you "pump away" from the expansion tank the system static pressure increases a little when the circulator operates, when you are "pumping toward" the expansion tank the static pressure drops a little which can cause several unwanted problems. Establishing the expansion tank as a point of no pressure change is also advantageous as this is where a fill valve will be commonly tied into the boiler system. I'm sure there are people able to better explain this than me, and there are systems that function just fine with poor piping strategies, but its always a good idea to follow best practices from the start in my opinion
GGross
Re: Please comment on a boiler re-install
@GGross: Surprisingly, i am able to get modest heat and certainly enough to prevent freezing out of the viessmann notwithstanding all of the forum chatter on isolation of the pumps. It may be because of the oversized??? grundfoss pump which is set on level 3 or perhaps the undersized 3/4” pex???. Previously, I had a B&G 100? Which worked perfectly. The Slant Fin is always and rather quickly tripping off on the high limit; I don’t think it is getting enough flow. I don’t use the Slant Fin at all.
Re: Pump Size
1 gpm in a 250 foot loop, 1/2 loop is around 9.4'
In a 300' loop around 11'
This is the pressure drop just for the loops.
This free PPI calculator allows you to plug in other components, valves, fittings, etc.
If the actual load is smaller, then you are back at the .5- .65 gpm per loop number
hot_rod
Re: Flue condensation after boiler replacement
At those temps? Very easy. Get a 316Ti ss liner with a lifetime warranty. Try to get a smoothwall one.
