Best Of
Re: OLD Boiler Bi-metal Switch
like @EBEBRATT-Ed said, it is probably not the switch, it is the pilot flame either moving off of the sensor from the draft of the burner moving the flame or shrinking because of a gas supply or regulator problem and causing the sensor to cool and open the switch
mattmia2
Re: treatment chemical for steam boiler
I don't know why, @ethicalpaul,yours didnt surge.
Mine runs on ounces per square inch and is very quiet. I tried 8-way and followed the instructions. It sounded like hell and I swore off the stuff for y e a r s because at 2am, my wife insisted that I do something. To get into my basement, I have to go outside in the cold dark.
I'm back on the stuff again but I use a fraction of what it calls for. Between you and @ChrisJ , I thought it would be worth another shot.
SlamDunk
Re: Triangle Tube boiler not flowing
I had a new motor put in so that fixed it (as the plastic rod is fresh, not worn from slipping out) but I agree, terrible design and will most likely happen again. When the company that did the work called TT to review, they were told they should add extra piping on the primary loop as a bypass as indicated in previous post.
t300
Re: Single Steam Radiator isn't Heating Up
"But would this cause the steam from reaching the radiator or is there another issue? It's not like water would be blocking the steam from getting to the radiator."
Oh yes it would. A moderately sized puddle of condensate is astonishingly good at blocking the steam flow!
The problem is that steam in your pipes is just at the point of condensing. When it passes over standing water, that's exactly what it does do, and none of it will get by until the entire puddle is heated to full steam temperature — and even then, very little will, as the energy in the steam will try to evaporate some of the puddle, which will then recondense, and so on.
Fix the sag.
Re: Is it bad if a modulating boiler never runs deep into the turn down ratio, or high in its capacity?
On any given 50° outside temperature day, the reset curve may only allow 120° water temperature to leave the boiler (that is a guess and it is based on the curve you select based on how much radiation mass you have) that said, if the returning water is at 110°F and you are maintaining comfort in the home, the burner only needs to supply the amount of BTUs required to reheat that water to 120°. Now if that happens to be 15,023 BTUh then your boiler will be operating at the minimum of 14,000 when the outdoor temperature climbs to say 52°. Any higher than that and your burner will cycle off for some short time then back on for some short time maintaining the even cooler boiler water temperature. So I would not worry about it never operating near the minimum. Outdoor reset snd mild temperatures will take care of that.
As far as operating at the maximum rated temperature. If you were to add a indirect water heater to your system, then the DHW demand would force the burner to the MAX Output on ever call for DHW. So there areboth of your fears handled.
And BTW…. I don't think that your suggested problem is a real thing. Whenever the power goes out, the boiler start up goes to full MAX flame for a few seconds on the startup sequence anyway.
Re: Is it bad if a modulating boiler never runs deep into the turn down ratio, or high in its capacity?
#2 issue: the total EDR for my radiators is 764 (it's a huge, old gravity system!) and so the slowest pace my radiators can possibly run at only 110 degrees is about 22,900 BTU.
Why have you concluded that the lowest temperature at rads is 110F? You could run the rads at 100F when the OAT is 60F and they would deliver something around 17,000 BTU. If the boiler can get down to 14,000, it would run constantly without cycling unless the building reaches the setpoint on the stat with 17,000 BTU.
The goal is to send the coldest water possible and still maintain temperature in the space. Ideally, you set the 'stat at 72F and the building never quite reaches the setpoint (assuming your comfort level is 70-71).
Many folks get all perturbed when the space remains slightly colder than the setting on the 'stat………………….."MY BOILER WON'T HEAT MY BUILDING"…………….. That is the perfect way to operate it. It is all related to the heating curve that YOU program into it.
I do believe the Rinnai is a bit large compared to your HL calculations but not excessively so.
LRCCBJ
Re: Is it bad if a modulating boiler never runs deep into the turn down ratio, or high in its capacity?
Oh yes. And if the zone is small enough, the boiler will have to short cycle…
Re: Maid O' Mist Retro Advertising
I hope you get some good stuff! And I hope you'll consider advertising here on this fine site, where I learned of your products and company!
Maid O' Mist Retro Advertising
To My Fellow Hydronic and Steam Aficionados,
I hope someone can help me with a request. I am looking for images, PDFs, or hard copies of our old advertisements and catalogs. I have been considering recreating some of our ads from the 1950s, 1960s, and 1970s. While Maid O' Mist HQ has some archives available, it is challenging to find older artifacts since the company is over 80 years old. If anyone has resources or can assist me in this search, please let me know. Thank you!
Brian Salem
Maid O' Mist
Re: Indirect Water heater Calling for heat but Boiler won't turn on
It's hard to make out your wiring, but is the priority function setup correctly? There are 2 options, priority or priority plus. the plus mode has a timer that will cut out the priority zone after a certain runtime and not allow another call for a set amount of time. turning the control off and back on would likely reset that timer allowing for a priority call, but then we would want to know why the prio zone is calling for more than an hour straight.
GGross