Joined on August 11, 2008
Last Post on December 5, 2013
@ December 29, 2011 2:36 PM in heat not working properlyWhat does the pressure on the boiler read? It sounds as though the supply to the auto-fill regulator has been shut off. You need a certain amount of pressure to keep the system full to the highest point of radiation.The auto-fill regulator is on the city/well water supply to the boiler. The normal pressures of domestic water supply are much too high for the boiler and must be regulated down to, in your case approximately 15 psi. Find the supply water for the boiler, and make sure it is open, then check the pressure on the system. Let us know from there.
@ December 27, 2011 5:51 PM in Low mass boiler and cool return tempsHere's some light reading...... http://www.comfort-calc.net/Bypass_Piping_Explaination.html
@ December 26, 2011 6:56 PM in Low mass boiler and cool return tempsStarting a bypass circulator based on supply temps is like closing the barn door after the horses get out.
@ December 26, 2011 6:52 PM in Low mass boiler and cool return tempsThat aquastat has the ability to turn off the low limit, so it can be used as a cold start boiler. If it is maintaining, obviously the low limit is not turned off. It functions the same as any triple aquastat....high limit,low limit and differential. The low limit and differential should limit the time the boiler spends condensing if set properly.It shuts the circulator off if the boiler temp falls below the low limit and diff. setting.Between that and your bypass you should be able to do a pretty good job.
@ December 26, 2011 12:23 PM in circulating pump runs 24/7 sometimesLet's just say, that if either will work in a given situation, which do you choose......The Alpha designed for electrical efficiency(at least $3/mo.), or the Delta-T designed for system efficiency with the added bonus of electrical savings?
@ December 24, 2011 11:26 PM in Question on bleeding air from convectorHere's the manual for that auto-fill regulator. I'd also pick up a cheap sillcock pressure gauge to put on the boiler drain to double check the accuracy of your gauge. http://media.wattswater.com/1910265.pdf
@ December 24, 2011 7:12 PM in aquastat controlThey will run just fine,until they fail 5-10 years prematurely.
@ December 24, 2011 7:00 PM in circulating pump runs 24/7 sometimesI'm not sold on it........Running at max., it's slightly over 60 watts (1/12th HP). One claim I read was that it was estimated that half of the electrical use of some homes in Europe was attributed to the circulator.....imagine that. Honestly, I think the Taco Delta-T, designed to optimize efficiency of the system as a whole is much better as an upgrade to a system. Just my thoughts.......MERRY CHRISTMAS!
@ December 23, 2011 10:53 PM in circulating pump runs 24/7 sometimesFrom what I read, the alpha does not have a zero output in its functional parameters. Which means it would still have to be controlled by the boiler controls.Am I reading it wrong?
@ December 21, 2011 9:42 PM in Boiler bypass???I'd do some research on mod/con boilers for your next boiler. For comfort and efficiency you won't find a better solution.
@ December 21, 2011 9:02 PM in aquastat controlLet's see.........We know that cold start boilers will fail faster than warm start boilers. I'd be pushing that set-up,if I was a boiler manufacturer.
@ December 21, 2011 3:31 PM in aquastat controlWithout knowing the specifics of HIS system, I wouldn't advise him to set the low limit that low.The OLD gravity systems you are refering to had boilers that were not built by todays standards. I'm sure you've removed a few, and know that the castings were 3 times the thickness.And I believe the manufacturers saw premature failures of their boilers, and chose to have the aquastat control the circulator on a call for heat,to reduce the time the boiler spent condensing.
@ December 20, 2011 9:32 PM in aquastat controlicesailor.......you got your post in before I got mine in. I was refering to the 180 high, 120 low, with a 20 degree differential as bad. It will start circulating at 130 and stop at 110.
@ December 20, 2011 9:06 PM in oil burner stops and starts midcycleThat is probably the burner relay.It is caused by rapid opening and closing of the contacts.Check all wire connections associated with TT in the aquastat.Check available volts at TT.
@ December 18, 2011 10:56 PM in My Hydronic Setup - Happy but not happyI urge you to seek qualified help.There are too many things wrong with that installation and it reflects a lack of skills.It all needs to be redone,probably including the gas supplying it.
@ December 18, 2011 9:03 PM in Issues with relay..This would make it as simple as possible.
@ December 18, 2011 10:37 AM in Issues with relay..Search Honeywell and the specific control you have, and they will show you how to zone the system properly.
@ December 17, 2011 10:19 PM in aquastat controlThat combination of low limit and differential is the worst possible. It will circulate water at 130 degrees,the condensing point.
@ December 17, 2011 6:13 PM in return dripPex is not rated for the possible temperatures of the condensate.
@ December 17, 2011 3:31 PM in more boiler helpFollow Taco's instructions to calculate the minimum pressure needed to keep the system full to the highest point of radiation.Twenty psi is way too high cold, and you're killing the expansion capabilities of the expansion tank.As stated, the tank must be removed from the system,and set to the same pressure as the auto-fill.Be careful, that little tank is surprisingly heavy. I don't believe your problem ,based on what you have said, involves a leaky tankless coil.You're basically doing what the clown that came out should have done.
@ December 16, 2011 10:54 PM in Mixing valvehttp://www.taco-hvac.com/uploads/FileLibrary/102-080.pdf
@ December 16, 2011 10:32 PM in New Taco 00R. Which speed to run, and where to put it?It was just a thought. To keep it in perspective......after the write-off, and over the lifespan of the circulator,you are probably talking $1.50 a month in rent money.