New vaporstat
Comments
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ideally but it is a product there isn't a lot of demand for so i don't think it quite got redesigned correctly when they stopped making them with mercury switches
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I still stand by my previous statement. So since I got the boiler back up and running, now I can't build any pressure on the boiler. Been running for about 25 minutes and not 1 oz of pressure
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So it finally built up pressure and cut out right where it is set…about 4 oz. I have the diff set at 2, but the boiler will not restart until all the pressure is off the system and then a little time beyond that before I get a restart. Is there a way to adjust only the diff?
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if the radiation is matched to the boiler it will never build pressure that is the ideal situation. since you were getting steam in the returns, maybe from a cold start there is no steam in the returns yet and some stuff is getting a chance to vent and heat that doesn't on an already warm system.
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I think I'm having venting issues. I can hear it vent sometimes when theres pressure on the system. I've got 2 new gorton #2 vents ready to go on, but didn't want to risk ruining them till I get the blow by of the 2 water seals fixed.
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Well I can't say I have been following you whole saga, but if it makes you feel any better my boiler pressure never exceeds:
2" Water Column
1.156 Oz
0.072 PSI
No pressure limiting controls needed.
If you truly expect to build pressure (the Boiler size exceeds the EDR) you may now have a leak somewhere.
National - U.S. Gas Boiler 45+ Years Old
Steam 300 SQ. FT. - EDR 347
One Pipe System0 -
" Is there a way to adjust only the diff? "
well yeah, dial the left scale(differential) down to 1, (I think) picture?
and push the cut out up to 5, an oz or 2 doesn't matter
known to beat dead horses0 -
just up enough so you're off the floor
known to beat dead horses0 -
I meant fine tuning. Like the screw in the back for fine tuning the main pressure
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Steam won't bother the Gortons they are made to close with the presents of steam.
National - U.S. Gas Boiler 45+ Years Old
Steam 300 SQ. FT. - EDR 347
One Pipe System0 -
I adjusted the main to 6 oz and the diff to 2 oz, and it still won't restart until the pressure is off the boiler
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So it would take approx 22 minutes to go from a hot start, to cutout, to cut in and then to cut out again. Does that sound like the right amount of time?
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Even with 2 water seals leaking through? But I guess there is one on the main steam lineal, and that's around 160°
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You may need a more stable setup to calibrate and and verify adjustment and functionality of the vaporstat, like in the video.
National - U.S. Gas Boiler 45+ Years Old
Steam 300 SQ. FT. - EDR 347
One Pipe System0 -
but it restarts, correct?
what gage scale are you trying to track this on?
oz's are hard to see
known to beat dead horses0 -
It initiates a restart approx 30 seconds after the gauge reads 0. The gauge is a 0-3 psi gauge. Only 2 days old
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Just set the main to 6 oz and the diff to 1 oz and it still will not initiate a restart until there is no pressure on the boiler and about 30 seconds after that
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the return trap on your radiator may be hot from steam getting in to the return somewhere else and flowing back to that radiator
the steam in the return will close the vent and stop all venting at that point. anything that hasn't vented when that happens won't heat.
(i didn't read your other thread with 100 comments)
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There are 2 radiators that are the only ones that the water seals are 130° ish. Every other one is ambient temp
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it could be a crossover trap if that system has them or a drip that isn't below the water line too
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In the short term the inserting an orifice plate that mattmia2 mentioned may be the quickest way the get those radiators under control by limiting the amount of steam entering them.
You may find this interesting
https://youtu.be/8KisKrAaywQ
Mouat water seal movieNational - U.S. Gas Boiler 45+ Years Old
Steam 300 SQ. FT. - EDR 347
One Pipe System0 -
I watched that video. Pretty cool learning about this stuff. Thanks.
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You may want to have a conversation with PMJ, or at least read some of his posts about his Mouat system. I believe he does not use a vaporstat to limit the pressure cycle to cycle. Ultimately you may choose not to use his techniques but you should know the options.
National - U.S. Gas Boiler 45+ Years Old
Steam 300 SQ. FT. - EDR 347
One Pipe System0 -
More Mouat info here. Other videos on Youtube also.
National - U.S. Gas Boiler 45+ Years Old
Steam 300 SQ. FT. - EDR 347
One Pipe System0
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