Joined on October 13, 2004
Last Post on March 8, 2014
@ March 8, 2014 12:26 PM in Pumping away ? I must have something messed up! HelpI think Ice may be on to it. Quite possible the circ differential is making the fill valve dump into the system.......unless the make up water is off.
One other thing is x tank pressure properly set?
@ March 8, 2014 11:24 AM in Pumping away ? I must have something messed up! HelpAre you sure all circulators are pumping in the right direction?
@ March 7, 2014 8:45 PM in Recently Completed Radiant JobThat is beautiful. Tubing is cheap keep the spacing tighter. I like that concept, keeps water temps low, and temps even.
@ March 7, 2014 7:50 PM in Heat loss through rim joistThe installation guide clearly states that you can put an 1 1/2" hole anywhere in the WEB and not in the hatched area over a bearing wall. As soon as you go to a 2" hole you must be no closer than 1' from the FACE of a bearing wall. Clearly what the OP wants to do is not except able per TJI install instructions. PERIOD
TJI or BCI are very vulnerable when you start carving out the web over bearing points. The holes the op wants to elongate are in the bearing area of the joist.
@ March 7, 2014 6:17 AM in Heat loss through rim joisthttp://www.woodbywy.com/document/tj-9001
Read documentation for TJI before you do anything here is the link.
You can drill an 1 1/2" hole about anywhere just below the bottom of the top flange, but not 2" , nor elongation of hole. You should be 1' 6" from bearing point face of wall.
If anything consult factory rep with your question before doing anything.
@ March 5, 2014 7:10 PM in Fuel use question?http://www.homeenergy.org/show/article/nav/consumerinformation/page/2/id/825
The census was in 1997 but it gives you an idea. I would suspect those percentages have changed for the better 16 years since then.
@ March 5, 2014 6:16 AM in Unequal circulators in serieshttp://www.engineeringtoolbox.com/pumps-parallel-serial-d_636.html
@ March 4, 2014 5:12 PM in Help!! staple-up insulation foil mythPlummer is right. Next they will want window replacements. Triple glazed krypton filled please.
@ March 4, 2014 12:04 AM in Help!! staple-up insulation foil mythNot over my head. Depends on how your system is set up. Staple up is what you have. What temps are you supplying? Is it zoned? Usually it happens when a certain zone is turned down to bare bones and the boiler is up to temp maybe coming off a call from another zone. Boiler is hot cold zone calls, and bingo bypass piping only helps a little.
So the boiler can be a cold start boiler, and still get thermal shock in certain scenarios
If your boiler is suffering from excessive condensing then there will be metal flakes in the pan below the burners, and on the burner tubes. Don't know your service regime annually or otherwise. Has it been serviced periodically?
If your boiler is plumbed according to WM I/O manual then point that out to the buyer, and inspector. If not they may have a point.
@ March 3, 2014 6:49 PM in Help!! staple-up insulation foil mythThat this home inspector is being thorough good for the buyer.
Last year a friend of mine bought a log home with all kinds of trouble......and had a home inspection for 400 bucks. When i asked what the home inspector said about the issues in all facets plumbing, structural, electrical .... My friend said all the inspector said is this house will be a lot of work.
About the low boiler return temp boiler shock would be what the inspector may suspect. If in deed there has been thermal stress over the last 10 years it would be leaking by now.
Simple boiler bypass does not always guarantee protection through out a heat call.
I have a WM Cgm 7 that's been drinking 95* return water from my radiant for 21 years simple boiler bypass installed.. Reasons of survival rate can be attributed to a generously oversized boiler. But as far as condensing its a non issue as boiler is always above 135 after heat call.
Incidentally I have been hoping this thing would die so I can mod/con it. I hate pulling a perfectly good unit out to install a new one. That's why I have not worried about the return temp for the last 13 years I have had possession of the castle. Alias it lives on.
@ March 3, 2014 6:08 AM in Got my Sorbox today.Be sure, and let us know how much debris gets pulled out of the system upon your first inspection after installation.
Is this an old existing system, or brand new?
Happy to help Roger.
@ March 2, 2014 10:40 PM in Unequal circulators in seriesWhen pumps are plumbed in parallel their flow rates will be additive with both pumps at the same head.
When pumps are plumbed in series their head will be additive when both pumps have same flow rate.
What do you need to do? Increase flow rate, or overcome more head.
Or just make it simple and get the right size pump.
@ March 2, 2014 10:18 PM in Mixing Radiant Floor and RadsOne is out door reset for the boiler. You probably don't need 180* water to the radiators everyday of the heating season. IF your rads are oversized you may not even need 180 on the coldest days.
Your radiant will need a mixing valve it's done that way all the time. Taco I series comes to mind.
It would not hurt to do a room by room heat loss calculation. See if your rads can match the calculated loads with lower water temps.
@ March 2, 2014 12:46 PM in Got my Sorbox today.1 cubic meter per hour = 4.4 gpm
.1 kpa = .03 feet of head
Or .1 kpa = .01 psi
6 bar is 87 psi
3 m cubed per hour is 13.21 gpm
@ March 2, 2014 10:25 AM in Got my Sorbox today..9 kpa converts to .30 feet of head.
1 cubic meter per hour converts to 4.4 gpm
So at 20.25 gpm it's only .30 feet of head.
I thought it would be its design is like an air removal chamber.
Someone check my math though.
@ February 28, 2014 4:36 PM in Has anyone ever heard of this?Would be due to the lateral bracing that transfers the load from top to bottom chord shrinking from temperatures in the attic being cold.
In other words the width of the top chord shrinks along with the length of the lateral bracing. As you get to the middle of the bottom chord span the lateral bracing is longer so more shrinkage, the higher the roof pitch and longer the span the worse it gets. Couple all that with dry winter air sucking moisture out of the lumber.
There is a different physics with what is POSSIBLY going on in the I joist situation.
Mark is doing exactly what I think the APA is looking for, and that is guidlines to protect their products. Except Mark will do it in a more direct type of verbiage not an umbrella statement of bits, and pieces of information put together into what THEY think it should be.
Hopefully his words do not get garbled in translation to a I JOIST guideline documentation.
@ February 28, 2014 4:27 PM in Has anyone ever heard of this?Are two different types of framing members. The method of transferring the load top to bottom chord along its length is the same principle though.
@ February 27, 2014 10:32 AM in Has anyone ever heard of this?Ice they know what to look for as far as framing details not being followed. I would think that would be the first area to look for a problem. If those details meet their requirements then they will look at other possible sources of cause, and effect.
@ February 27, 2014 6:32 AM in radiant in ceiling?http://www.heatinghelp.com/files/articles/1113/99.pdf
@ February 27, 2014 6:03 AM in Has anyone ever heard of this?I don't believe it is that extreme of a case. That would call for removal of the joist.
@ February 26, 2014 6:05 PM in Has anyone ever heard of this?When considering the letter to the RPA they are looking for help, and guidance. That's better than condemning radiant heat around their products.
The how's, and whys this happend or is happening is leading to a high temp plate less radiant system that is attached to the upper flange of the joist possibly not insulated.
In other words poor installation practices. If at the very least this is indeed a problem then maybe they could insert a section on radiant heating protocol in their instructions.
Now IF this is indeed an effect of high temp poorly installed radiant heating then this should be a temporary effect. If drying of the upper say 1/4-1/3 of the I Joist is causing shrinkage due to moisture being driven out of the wood then after the heating season the total I Joist detail should acclimate itself through out its cross section. Woods a sponge always seeking equilibrium. So deflection should dissipate during the non heating season..
I would personally like to see moisture meter reading through out the cross sectional area of the joist. Was this done? Or we're visual assumptions made we see radiant there is the source of the problem.
I would also like to observe loading of the span, and attachments to, and with in the joist. I'm sure the APA observed these first before looking else where for a culprit.
At the very least out of this I see an opportunity for the RPA getting a foot hold on proactive information rather than reactive information inserted into documentation for various wood product manufacturers. It always seems here that people come with problems after it's a done deal, and money is the only solution in righting a hacks wrongs. It gives radiant heating an undeserved black eye.
We can not only depend on people with problems finding heating help.com.