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Weil Mclain 155 Backfires

This boiler works normally except occasionally when transitioning from high fire to low fire, the spark ignites before purge, resulting in a small “backfire” to the air silencer. Does anyone know the cause of this?

Timothy1234

1

Re: Weil Mclain 155 Backfires

This is an Ultra 2 155 with a yearly maintenance/cleaning and a brand new blower. It backfires about 1 in 10 starts but at other times, it goes into an overheat hard fault - the recirc pump isn't turning on when this happens. Restarting the unit fixes this situation for a day or so, but then it reoccurs. Could this be a software problem in the controller? Ive checked the supply and outlet thermocouples and they're fine. The recirc pump isnt getting voltage from the controller when it goes i to the hard fault. The backfiring doesnt cause a fault which is pretty scary!

Timothy1234

1

Equalizer disabled experiment video

I installed a valve on my equalizer so we could all see what it does, have a look and let me know what you think, thanks!

But please try to stay constructive if possible

https://www.youtube.com/watch?v=6ZLg3fqU1MQ

ethicalpaul

5

Re: you can't get good help........

I agree to a point Hot 🔥 Rod. I have read long and extensively on organized crime, 1% bikers, gang bangers, and American Immigration and never, have I read where The Irish Mob in NYC - The Westies or the Whitey Bolger -Boston Irish Mob or Mayor Richard Daly Irish thugs or La Cosa Nostra, The Bund, or Even Russian Mafia or Albanians wantonly shot, hacked to death with machetes, stabbed and mutilated innocent children who simply didn't want to join the gang. 20 miles from where I sit is Brentwood, Suffolk County. A HUGE contingent of MS-13 and the horrible, grisly murders of innocent girls and boys lured in to the woods to meet a horrific ending. Thankfully, after this The Feds and whole law enforcement world crushed them...for now. Less than 3 miles from here we got MS-13 gangs out in the open.. I see them all the time, sometimes on my pre-dawn bike rides through Hempstead. They are not an innocuous protective society for their women and children. They aren't out at 4am sweeping the sidewalks, and planting tulips on the median for the gentrification of Hempstead...6 miles away right next to my two Daughter's HS, MS-13 struck again...luring an innocent teenage boy who was just trying to stay away from them in to the woods to use their weapon of choice...The Machete....Painfully Hacked him to death and dumped him in the narrow strip of woods between the Meadowbrook Parkway and their HS.....less than 50 yards away from my daughters entrance!! NYC has it all. I've lived and worked amongst all the aforementioned gangs (sans the 1930s Long Island Bund Colony of Yaphank). my whole life...These gangs are the most vicious 😤 and threatening to the general innocent public than any other I have seen in my 55 years. Worst of all, they pray on their own.... Respectfully, Replying peace ✌ Mad Dog

Mad Dog_2

2

Re: Equalizer disabled experiment video

Thanks Rusty!

Don't give me too much credit—that's the beauty of having a steam boiler in my house and working in a different industry, so when I get home I'm not sick of the topic 😅

Note that I don't think it doesn't have a function—it is a great drip from the header and there are edge cases where it will prevent the hartford loop from having an air bubble in it. I'm not sure when it got this name but apparently old books called it a "bleeder" or "drip".

What I hoped to show (and I think I have shown) is that it seems NOT to have any effect on the thing that the industry currently thinks is its most important function, to prevent the water from being pushed out of the boiler under normal operating conditions. Thanks again for your note.

ethicalpaul

1

Re: Honeywell supervent

The biggest issue here is that it's piped backwards. The pump needs to be on the downstream side of the Supervent/ expansion tank in order for the system to work properly. The odds are pretty slim that the Supervent needs any sort of service, but if it does, you can loosen that brass nut on the top and remove the guts without removing anything else.

With that 4 way valve, the system pump is pumping away from the PONPC.
The boiler pump would be better on the return piping, but it should vent air as piped. It's a small, low pressure drop path from boiler, around 4 way and back to boiler. Looks like an 007 so it is not developing a lot of delta P.

It is piped in the hottest point in the system, that is the #1 mechanism for air removal, lowest pressure is second.

No harm in disassemble and inspection. If it has a lot of mineral scale, that too would indicate it is taking on fill water.

If there is a vent inside the boiler jacket, try screwing the cap closed.

hot_rod

1

Re: Honeywell supervent

Had the same thought. Someone else had a similar problem. Most thought there was a leak and makeup water was loading the system with air. While it may be piped correctly, a steady flow of fresh water into the vent has got to make thinks worse, my opinion.

Jon_blaney

1

Re: Honeywell supervent

The biggest issue here is that it's piped backwards. The pump needs to be on the downstream side of the Supervent/ expansion tank in order for the system to work properly. The odds are pretty slim that the Supervent needs any sort of service, but if it does, you can loosen that brass nut on the top and remove the guts without removing anything else.

GroundUp

1

Re: The "equalizer" is mis-named. It does nothing to equalize anything.

This whole post reminds me of a book called Pumping Away, how that author had the audacity to take on an entire industry of all knowing boiler engineers about expansion tank placement.
How dare he!
Wait until the book banners in Florida get a of that wokeness
woke: a state of being aware

ChrisJ

6

Re: A Liittle R & R for a few hours...

What does "SPOILER" mean, Erin? Mad Dog

It's just a feature that comes with the forum software and is mostly used in forums where they discuss movies and TV shows. It's used to hide/reveal parts of posts that can contain spoilers about the endings to shows, etc.

Erin Holohan Haskell

1