Joined on August 17, 2009
Last Post on December 9, 2013
@ September 19, 2010 7:46 PM in Does NFPA 54...latest code in my home office it is at the training center. This is from NFPA 54 2002 and I do not think it has changed much other than perhaps the numbers. I will double check the new code tomorrow.
10.5.5 Chimney Serving Equipment Burning Other Fuels.
10.5.5.1 Gas utilization equipment shall not be connected to a chimney flue serving a separate appliance designed to burn solid fuel.
10.5.5.2 Where one chimney serves gas utilization equipment and equipment burning liquid fuel, the equipment shall be connected through separate openings or shall be connected through a single opening where joined by a suitable fitting located as close as practical to the chimney. Where two or more openings are provided into one chimney flue, they shall be at different levels. Where the gas utilization equipment is automatically controlled, it shall be equipped with a safety shutoff device.
10.5.5.3* A listed combination gas- and solid fuel-burning appliance connected to a single chimney flue shall be equipped with a manual reset device to shut off gas to the main burner in the event of sustained backdraft or flue gas spillage. The chimney flue shall be sized to properly vent the appliance.
A.10.5.5.3 Reference can also be made to the chapter on chimney, gas vent, and fireplace systems of the ASHRAE Handbook-HVAC Systems and Equipment.
10.5.5.4 A single chimney flue serving a listed combination gas- and oil-burning appliance shall be sized to properly vent the appliance.
@ September 19, 2010 11:30 AM in hometo what you are doing as sizing depends on the system piping and length of same. Not quite sure what you are looking for?
@ September 19, 2010 11:27 AM in New direct vent gas boiler reccommendationsof very good Mod/Con side wall vented boilers on the market. I am sure all the techs here will chime in and tell you about there particular choice. Getting a good contractor is probably the most important thing. It is a good idea to have a heat loss done so you can accurately size the new boiler.
I am surprised that your local code calls for 10 foot separation from doors and openings. Most National codes call for 4 feet from any windows, door and openings.
An alternative is that many of the new Mod/Cons allow venting through a chase to the roof. In the process of your remodel you could plan that into the design.
@ September 19, 2010 11:21 AM in Does NFPA 54...the same flue as long as the water heater is installed above the oil.
@ September 19, 2010 11:16 AM in Gas Explosion is the worst I have ever seensubject to a survey inspection on a pre-determined schedule. In addition this is why odorant is added so that the general public can become part of the survey. If you smell gas you never enter a building and you call the gas company or fire department.
Most piping is also corrosion protected with anodes which are also monitored on a frequent basis to insure the integrity of the piping.
There is no control however over out side construction damaging piping and failing to report the damage.
This particular pipe is also in an area that has frequent earthquake activity so I would hope a more intense survey schedule would be carried out.
When you look at all of the pipe in the ground carrying all kinds of volatile substances we have a fairly good safety record here in North America.
@ September 17, 2010 6:27 PM in weil mclain gv gold lockout problemsconnected to this system? The bottom two lights TSTAT/CIRC and POWER lights flashing can indicate stray voltage on the external thermostat wires (often due to incorrect wiring on a 3 wire zone valve).
Disconnect the wires connected to the boiler thermostat leads (two black low voltage leads in the junction box)
Connect a voltmeter across these two incoming wires . Turn the thermostat up to create a call for heat. You should never read voltage across these wires if you do then there is something wrong with the wiring or if you have a 3 wire zone vale it may be wried wrong.
If there is no voltage is found on the external thermostat circuit, connect the two boiler thermostat connections together or jumper the boiler aquastat T - T terminals. Turn off the power to the boiler for about a minute. Turn on the power and allow the boiler to come on. Do the TSTAT and POWER lights still flash? If yes then the control module is faulty.
@ September 17, 2010 3:42 PM in Gas Explosion is the worst I have ever seen
- States wait for results of inquiry into San Bruno, Calif., incident
The natural gas blast in San Bruno, Calif., has raised questions about the safety of other states' gas grids, but regulators say they won't be rushing to order expensive overhauls. Instead, state officials plan to continue regular inspections and wait for the results of an inquiry into the causes of the San Bruno disaster. "Right now, we have a very thorough inspection process, and we'll continue with that," said one pipeline-safety official. [u][color=#0000ff]Yahoo!/The Associated Press[/color][/u] (9/16)
@ September 17, 2010 3:39 PM in Eat them up!!!!
- Study: Propane-munching bacteria helped clean up the Gulf
The damage from the Gulf of Mexico oil spill would have been worse if not for strains of propane-munching bacteria, scientists believe. Studies suggest that propane and natural gas released during the spill sparked a bacterial population boom as the bacteria feasted on the gushing gases. Once the propane and NGLs were depleted, researchers believe, the organisms turned their attention to hydrocarbons such as oil, helping to mitigate the damage done by the disaster. [u][color=#0000ff]Los Angeles Times[/color][/u] (9/16)
@ September 16, 2010 8:35 PM in weil mclain gv gold lockout problemsmodel number and make of the Integrated Boiler Control? That will help me to determine diagnostic procedures.
Do the lights give any flash codes when you find it is in lockout?
@ September 16, 2010 5:44 PM in Gas Hot Water Boiler or Gas Furnace?you on the Wall section of this site.
@ September 16, 2010 5:43 PM in Gas furnace venting?especially if you have problems and need to get atthe piping. If you are building you have a lot of flexibility now as to location so make it as short and easily accesible as possible.
@ September 16, 2010 5:41 PM in Losing waterreturn line a dry or wet return? If it is a wet return is it buried in the floor? If so it could be leaking.
Are there any steam leaks anywhere on the piping system.
@ September 13, 2010 8:50 PM in Gas Explosion is the worst I have ever seenwelds are x-rayed and a number is assigned to each weld and they are kept by the transmission company.
@ September 13, 2010 8:47 PM in Old Residential Power Burneran E-20 Economite Conversion Burner from Midco. There are still parts available.
DO NOT FIRE that burner with the front door off the burner as the flame will come back into the room.
It has a thermocouple operated safety pilot system. The door on the side is your primary/secondary air door. If you need any information e-mail me at firstname.lastname@example.org and I will postal mail it to you.
@ September 13, 2010 6:08 PM in Melted Plastic Top Of Water Heaterreduce the orifice size and leave the pressure alone. Have a professional do this who also knows how to do a combustion test to insure maximum/safe efficiency once the boiler is down sized. I am not a big fan of downsizing but I can't argue with the boiler manufacturer if they want you to do it.
@ September 13, 2010 6:04 PM in can't decide modulating boiler or no?room and then measure the baseboard if it is more than you need as to BTU's per lineal foot versus the heat loss then you lower the temperature to the baseboard without losing the required BTU for each room. With the Mod/Cons you need to get return water temperature below 120 degrees. So if you can run baseboards at say 140 degrees you will have plenty of heat. If not then add more lineal feet of actual finned baseboard so you can lower the temperature to it.
@ September 13, 2010 4:42 PM in can't decide modulating boiler or no?requires maintenance at least once a year. Most boilers today are Electric Ignition so parts can be expensive and many times it is tough to find someone who can troubleshoot them correctly. Many of the Mod/Con's however do require a little more service in that they have to be taken apart and cleaned.
What kind of emitters do you have in the house radiators cast iron baseboard convectors or finned tube baseboard?
The second contractor did a heat loss which is a good thing. Typically with insulation blown in the heat loss on the house has gone down so you can often run the emitters at a lower temperature helping for condensing to take place in the boiler. In the long run with ODR (Outdoor reset) and other features such as primary/secondary piping or by using a low loss header you can drastically improve the over all efficiency and give you a fairly good return on your investment.
@ September 13, 2010 4:23 PM in Melted Plastic Top Of Water Heater6 inch should be with a tee or a dedicated wye fitting.
I do not agree with derating your boiler by reducung gas pressure. What did they tell you was the minimum pressure? Who did you talk to at Burnham?
@ September 13, 2010 11:35 AM in Gas Explosion is the worst I have ever seen
- PG&E ordered to inspect all gas lines following California blast
Regulators have ordered Pacific Gas & Electric to inspect its entire natural gas pipeline network following a huge explosion that ripped through a San Francisco suburb last week, killing at least four people. The instruction came as investigators found unusual welds on a section of pipe in the rubble from the blast, a discovery that could raise questions over PG&E's pre-blast inspection protocols.
- [u][color=#0000ff]The Wall Street Journal[/color][/u] (9/13) , [u][color=#0000ff]Los Angeles Times[/color][/u] (9/12)
@ September 13, 2010 11:26 AM in Gas Explosion is the worst I have ever seenof some sewer work having been done in the area. I am sure when all this settles down they will come up with a cause. The NTSB handles these investigations along with DOT. That is because gas travels interstate through large high pressure transmission lines. They actually in this case built houses to close to the transmission line.
As you travel you will notice right of ways with electrical transmission lines above ground. In those same areas gas transmission lines are below ground in these so called "right of ways". Most states have strict requirements as to how close you can build to these and even for farmers how close they can plant crops.
Many years ago we had a farmer in Mass shear of the top of a blow off on one of these lines fortunately it did not cause any explosion or fire just scared the farmer half to death.
@ September 13, 2010 11:16 AM in Better stack vent dampers (than Effikal)extensive testing on dampers from Honeywell (D-80, D-892 & D-896), Effikal (Field),Flair and Johnson. In all cases when the damper is located directly after the draft hood or barometric versus further up he flue as close to the chimney or common vent as possible the fail rate is about 75%.
The issue is heat affecting both the metal expansion and contraction on the damper. This in addition to the effect of heat on printed circuit boards and end switches.
Dave I can't argue with your findings as to old being more dependable than new. Is this since Field bought out Effikal dampers? Have you contacted Field Controls?
@ September 11, 2010 5:35 PM in Gas Explosion is the worst I have ever seenin my 50 + years:
- Huge gas-line explosion rips through San Francisco suburb
YouTube/The Associated PressA huge fireball erupted in a San Francisco suburb Thursday night, destroying nearly 40 homes by one count and killing at least four people. The explosion, which triggered a fireball that filled an entire street, was apparently caused by a ruptured high-pressure natural gas line operated by Pacific Gas and Electric, although company officials cautioned that the cause of the blaze hadn't been determined. [u][color=#0000ff]The New York Times (free registration)/The Bay Citizen (San Francisco)[/color][/u] (9/10) , [u][color=#0000ff]Google/The Associated Press[/color][/u] (9/10) , [u][color=#0000ff]YouTube/The Associated Press[/color][/u] (9/10)
Today they stated that a weld may have come apart. very unusual as all welds on a 1,000 lb pressure transmission lines are x-ray tested at time of welding.