Joined on November 25, 2004
Last Post on January 24, 2010
@ January 24, 2010 11:48 AM in leaking taco 006 circulatorGuys,
Thanks for responding.
It's a bronze 2 yr old pump and there is plenty of oxygen in the water since it is an open system.
The o-ring was almost completely disintegrated, with some residual rubber. I suspect the temperature played a big role since that pump is sometimes running 20 hours continuously and is awfully hot to the touch, probably 200 F,though i haven't measured it. In spite of that, I find it difficult to believe that Taco didn't design it in.
I hadn't thought about oxygen.
What about using Viton since it has much higher temperature resistance?
@ January 23, 2010 11:54 PM in leaking taco 006 circulatorTook it apart and found the o-ring seal completely eaten up.
baseboard heating, copper and cpvc piping.
Using 160 F hot water in open system . Municipal water.
Why ? And do you think I should change to Viton seal.
Thank for your response
@ February 15, 2009 10:07 AM in Invention Help - small, lighter flame catalyzed heating systemWell, to heat up a cylinder to 350 F of the size you mentioned, you could easily by trial and error, using almost any point heat source like a propane lighter, make like a plumber, controlling the size of the flame. Copper would be better than aluminum and the high conductivity would assure an almost uniform temperature on the surface, and thus to the inside of the cylinder. Trial and error would get you almost any temperature you need. Try it with a piece of 1 inch copper tube that you can get in Home Depot. Sorry about that 3 year comment, but maybe with the economy where it is thanks to some of our great economists like Rubin, engineering might be a better choice for you.
@ February 14, 2009 4:16 PM in Invention Help - small, lighter flame catalyzed heating systemI assume the 350 deg is measured at the surface of the cylinder. What size cylinder are you thinking? Your biggest problem is an ignition system followed by finding a fuel for this. And how much will this sell for? Also, have you done a patent search to see if the device is already invented so that you won't be wasting time? Finally, what in the world is a 3rd year economics student doing in this complex field ?
@ February 12, 2009 11:32 AM in Piping adviceIf the baseboard installation is sized large enough for say 150 deg, then together with the setback feature and the fact that most times you wouldn't be at the max, then the efficiency hit should not be significant. Moreover, I don't see this as an issue if the boiler is already there. I would honor the customer request unless he is ambivalent about radiation vs baseboard heating in the new zone.
@ January 8, 2009 10:57 AM in using hot water heater for space heatingI don't understand.The Taco bronze circ pump is designed for domestic open systems. And it is not expensive, only about $130 for a 006. Exactly what failed? In which loop? What pin? Since you mention many valves. They are in the secondary (closed) loop and should not see much oxygen. So please explain this.
@ December 5, 2008 10:48 PM in water temperature rise and resulting psi.The worst case of no entrained air yields a pressure that is dependent on the largest storage volume such as the waterlogged expansion tank, its diameter and wall thickness and material. For example, if the water is heated from 65 deg to 180, the formula is 2tEa/D, where t is the wall thickness E is modulus of elasticity for tank material a is the difference in % linear expansion of water vs copper D is diameter of storage vessel For copper E=12,000,000 expansion coefficient over 120 deg F a=.0031 Assuming t=1/16" D= 12" Then, I get P=2*1/16*12,000,000*.0031/12= 387 psi(plus the nominal pressure) However, I wouldn't bet the farm on this.
@ December 5, 2008 11:02 AM in potable water circ pumpCan anyone recommend a 3/4" zone valve for potable water @ 100psi. Thanks
@ October 27, 2008 12:37 AM in Cold air running from vent - thermostat at 70You may have a furnace temperature limit switch failure which after the furnace shuts down senses the temperature at the furnace heat exchanger and opens at some cooler temperature. When working properly it then shuts off the blower. Yours may be stuck closed and keeps the blower on. Another reason is that the last serviceman may have used the furnace override switch for testing during servicing and forgot to restore it afterwards. In either event call your service person to fix it.
@ October 27, 2008 12:26 AM in Cold air running from vent - thermostat at 70You have your fan switch set to "on" which makes it run continuously regardless of whether there is a call for heat or not. Use the "auto" setting which will blow air only when there is a heat call from the thermostat
@ October 11, 2008 6:05 PM in Do I need a new transformer?Where did you measure the voltage- between which wires? Don't see how you can possibly get 37V AC.
@ September 22, 2008 9:53 PM in Transformer oddity...I disagree with any idea of paralleling 3 transformers, since a single failure will result in no heat/cool for the whole house. You should get a current reading on the faulty transformer feed line and if it reads correctly, I would change out the circuitbreaker since IT may be the problem.
@ September 19, 2008 5:21 PM in Water to Air heat exchanger?I would use a single thermostat, with the boiler and fan controlled normally. Assuming the outdoor unit has enough heating power to handle the heating load alone, then the furnace, is a backup. Therefore you need something to detect a failure of the boiler and turn on the furnace unit. I would use a time delay relay (TDR) that is powered by the Tstat and wired in series with a thermal switch located in the the ducting, set to close at say less than 90 F. For example, assume that the tstat calls, then the fan and the outddor boiler are activated and the TDR is powered . After say 30 seconds, if the temperature in the supply duct is less than 90 F, the TDR contact closes and being in series with the Tstat provides the signal to actvate the gas unit.
@ August 31, 2008 9:54 AM in Oil tank fuel systemAt what point do you replace the filter?
@ August 18, 2008 5:21 PM in Does anyone have am Infrared Camera to rent for a dayAs somebody mentioned, a decent IR thermometer should be able to get the job done.If you don't have one, buy one (<$100), since you will always have a need for this handy device In some cases, depending on how close the pipes are to the sheetrock, you could do it by feel. But all the IR thermometer has to get is a decent differential of say 3-5 degrees to establish the "line(s)" of the heat source(s) . A camera will not do any better since it is based on the same principle and is a lot more expensive.
@ August 12, 2008 2:22 PM in Heat transfer question...Good explanation!
@ July 27, 2008 4:53 PM in multimeterI wouldn't waste a lot of money on such a simple device. You don't need a big fancy name brand to do the job and you certainly don't need the RMS types . $45 would be my upper limit for a clamp-on which is a must. Go to Sears and get a noname brand on the cheap. Then, if you lose it why it wont cost you as much aggravation. I would also get an analog meter, (also cheap) for those ghost problems you encounter so often.
@ July 22, 2008 8:09 PM in Worst movie everMy vote for the worst: The Yellow Tomahawk starring Rory Calhoun--1954
@ July 12, 2008 1:58 PM in Funniest Movie EverMy two: The apartment The graduate
@ June 28, 2008 3:02 PM in EDRQuote"When servicing old hot-water heating systems that originally circulated by gravity, but now use circulating pumps, I began to notice a lot of oversized circulators. In some cases, the circulator was so severely oversized that the boiler could hardly get any heat out to the radiators. The water couldn't pick up much heat in the boiler or shed it in the radiators because it was moving so fast. There is very little resistance in the large pipes of a gravity system, so the" I am puzzled by this. Does it really mean that the boiler water is somehow short circuited? It defies my intuition but is of course wasteful of power. Could somebody explain this?
@ June 28, 2008 2:43 PM in What 2 invention had the greatest impact on our industryBusch and Cheney or Beer aand pretzels
@ June 16, 2008 2:17 PM in gravity hw systemGravity flow has NOTHING to do with inefficiency. Poor boiler performance and poor insulation are the culprits