Best Of
Re: NFB 175H Thermostat
No, their explanation doesn't make sense, and I still wonder, WHY would you do it that way? Do they have outdoor reset activated? If the settings are done right it will work but it is not the normal way of doing it. BTW, a good boiler you got there.
JMWHVAC
Re: Help setting up variable speed injection mixing
It may be too late, but I’m impressed with the Taco Radiant Mixing Block for injection mixing. Expensive, but so easy to pipe and program.
Re: Bell & Gossett Circulator
Do nothing at this time.
The expansion tank is part of the heating system and when I was in business, I included a replacement expansion tank in the price of the new boiler job. Do you have the contract for the replacement gas boiler? look closely at the terms of what is included in the job. Your contract should include a new expansion tank (but not necessarily) and a new relief valve (because that comes with the boiler already installed at the factory). You should also get a new circulator pump because that is included at the boiler factory. that is why I am suggesting that you do nothing.
Depending on the contract for your replacement boiler, things like gas piping, electrical connection to the existing power switch (that operated the oil boiler) and several other things should be part of the job.
Re: Bell & Gossett Circulator
I have some idea that @sjh does not have a full and complete understanding of the heating system and just wants to stop the noise that the B&G circulator was generating as a result of some other influences regarding either a leaking relief valves, shutting off the burner, closing a valve, and/or running out of oil or some combination of them. or perhaps another unrelated cause.
I also understand that there will be, in the near future, someone that understands boiler systems, on location, to install a new gas fired boiler.
I also understand that turning off the switch to the B&G circulator resolved the immediate noise issue.
I might suggest that @sjh leave the B&G Circulator switched off until such time that the new gas boiler installation commences and to make mention of that noise to the installer(s) of the new gas boiler, as they will be able to resolve the noise issue as a part of the new boiler installation project.
Any attempt to get that pump to operate at this time, without a more complete understanding of the purpose of that circulator, would be unhelpful as the information provided to date does not actually tell the whole story.
Re: Bell & Gossett Circulator
That circulator was an add on for some reason. It certainly isn't original. The loop is probably air locked because of the leak and shutting off the water.
HVACNUT
Re: indirect tank deterioration
@archibald tuttle said "this hyrdronic circuit receives actual boiler water from the cast iron steam boiler"
Their in lies the rub…. Steam boiler water is an open system, therefore lending itself to constant oxygen infusion into the boiler water. That nipple may have been made of material that is less resistant to the perils of oxidation lending itself to a greater instance of corrosion that other parts of the hydronic system. Or perhaps that was the only fitting that rendered a small leak to allow the rust to make itself visible on the exterior of the pipe whilst the rest of the wet portion of the system has only interior signs of rust and corrosion. This is typical of steam boiler systems below the water line. Perhaps a boiler water treatment plan can be implemented to retard the corrosion process, as is done on many steam boiler systems.
Re: Dunham valve rebuild?
I walked the entire sytem yesterday.
It does have 2 crossover traps, original Dunhams from 1930. YOU guys told me to ad main vents where there weren't any,on my similarly setup 2-pipe system from the same era.
Reeplacing 90 year old traps is a no-brainer. I'll replace all the trap innards and see how it all works before adding the gorton on the main.
And before anyone chimes in with "get a pro to do it" we live in a remote new mexico town, there are no pros, just hacks.
I came in here to ask about the valves, I'll figure it out myself.
Thanks
Re: Help - replacing broken indirect radiator
Doubt you can find one. You can take the plenum apart and put something in its place. They make steel fin tube for commercial jobs or a CI radiator etc.
Re: Spray Foam Pipe Insulation
Why did that make my stomach feel strange? 😏
Yours, Larry
Re: Vapor Steam Heating System?
I would probably re duct the indirect return duct to inside the house and cap off the OA intake.