Best Of

Re: The Duke Mansion Mystery

The mansion is no more. Too expensive to maintain.

https://www.nj.com/somerset/2016/04/doris_duke_mansion_has_been_razed_stones_columns_p.html

DanHolohan

0

Re: When did pressure relief valves become standard?

Ok..wrong saints name... Joseph Watts 1874 in Massachusetts..mad Dog

Mad Dog_2

1

Re: When did pressure relief valves become standard?

https://forum.heatinghelp.com/discussion/comment/1850763#Comment_1850763

I think this is incorrect, but regardless it doesn't say when they became standard equipment in home heating systems. Maybe they have always been, I have no idea.

I'm still confused as to why hot water boilers didn't need LWCOs. That still seems strange. They're just as "low water intolerant" as steamers, no?

ChrisJ

0

I work for a school that has 2 zf 600-ls unilux boilers. Nat gas. Powerflame burners cr4 burners. So I just started working on these a few months ago since the guy retired that used to. The buildings a complete disaster but what I noticed when both boilers were idle yesterday, some serious whistling from the combustion air dampers on both boilers when off and at min damper position which is like a 1/4 inch gap. For the heck of it I tested draft with both boilers off for the day cause it was warm out, I have .18 to .24 draft with boilers off. So today I checked with a boiler running, they switch boilers every cycle. One fires, then once that one reaches sp it shuts off, then the other one fires next time. They short cycle like crazy in warmer days,like 4 min runtime,but when firing the draft gets up to .3" which seems insane to me. There is no draft regulators, I would think there should be a dual action reg on each boiler. You can literally hear the heat being sucked out of them after shutdown. Then one just starts back up 2 min after the other shuts down. Loses psi fast. Set at 5psi because of hx's. I've already replaced some very old Webster 0026t's that were probly original to this building and I have many more traps to replace, e.o.m. and individual convector traps so hopefully that will allow system to not lose pressure so fast. But jeez. What have I gotten into here guys? Lol the venting of the 2 boilers is, the boiler on the right comes up with just a 90 into the common, then about 10 feet where the left boiler tees into it then another 6 ft to the left 90s into stack. All metalbestus

HVACRTEK83

0

Re: Strange oil burner operation

Determined what the problem was. Since I bought the electronic primary, figured it would be a good idea to install it as it had many better features than the obsolete R4184. After installation, I fired up the unit and once again it lit but went out after the new 15 second delay. Hmm, strange. However, with the new primer, I could see what was happening. It wasn't detecting the flame even though it was present. CAD resistance was reading erratically around 40k, way too high. Looking at the schematics more closely, I noticed a nozzle heater circuit which is always active when power is applied to the unit. Bingo! My theory, based on my readings, is that the flame is not at full brilliance with a cold nozzle when I apply power and call for heat. After the flame comes on, the nozzle heats enough, in conjunction with the heater, to keep the flame lit on the next and successive burns. Case closed.

Ken1234

0

Re: What do you think the future of our industry looks like?

AGREED

As poster Lance stated above: "That a career path in our trades needs a commitment to place all their training staring no later then 11th grade. Especially when so many have fewer experiences due to lack of shop classes, which must be brought back to our schools starting in 7th grade! Its time to put our tax dollars to invest in shop training to rebuild our work force'

Please tell this to the current administration that just dissolved the Federal Dept. of Education (claiming waste, fraud & abuse) and understand the States cannot make-up the difference in lost revenue.

Regards,

RTW