Joined on December 29, 2008
Last Post on December 11, 2013
@ November 30, 2009 7:23 PM in Now I see why the Grundfos person posted the video on You Tube.........A pump is sized to deliver GPM at a given head. A pump doesn't care what temp it is outside. You stated that the pump would be ok if it had to be constant. If it can overcome constant it can overcome any zone in the system.
I belive from your early post you stated that the boiler is 175,000 btus. That's fine, but what is the heat loss of the structure that you are trying to overcome? What is the total length in feet of your longest zone? For example, you want to deliver 150,000 btus at a 20 degree delta-t. That's 15GPM, let's say your longest zone length is 125 feet. That gives you a head of approx 7.5 ft head. The 0012VDT would be a better choice. Its exactly what you state. A flatter head pump.
I attached the PDF file on the pump.
@ November 30, 2009 6:35 AM in Now I see why the Grundfos person posted the video on You Tube.........the pumps to big. Why the 13 and not the 8?
@ November 28, 2009 7:01 AM in W-M indirectWeil doesn't make the indirect. It is made for them by Triangle Tube. An indirect is pretty much an indirect. Some may give you a little bit better recovery than others but all the warranties are pretty much the same. My advice on this would be to make sure you are adding a priority zone control in addition to the indirect.
@ November 24, 2009 11:27 AM in Sizing Pipe for Primary Loop?GPM Flow Rate = 8.33 x 60 x Delta-T divided by BTU output. In your example the flow rate would be 5.1GPM utilizing the standard 20 degree delta-t. You would need 1" pipe not 3/4". Max GPM for 3/4" is 4GPM or 40,000 btus on a 20 degree delta-t or if I was running a 30 degree delta-t then I could pull out 60,000 btus at 4gpm.
@ November 23, 2009 9:06 AM in 1 Taco 007 Pulling & 1 Taco 0010 Pushing...& I'm in the middle...What size is your supply/header piping? How many gallon indirect do you have? An amtrol WH-7 on 100,000 btu's should give you somewhere in the area of 170GPH. Can you post a pic of the boiler piping?
@ November 22, 2009 7:12 PM in Last Minute Staple-Up - Radiantec QuestionNice to see that you as a homeowner are doing your homework. My best advice is to stay away internet based radiant companies. Find a few plumbing and heating supply houses in your community and take a look at the radiant lines they carry. Do your homework on those lines. Ask for recommendations from those supply houses for contractors that install the lines they represent
Joist Heating with plates works great. Most water temps needed at design in this application depending on finished floor surfaces are generally below 120 degree water when using extruded alum plates not the plates that you spoke about in your previous post. The plates in your previous post were widely used back in the late 80's and early 90's. You need a higher water temp and must have that 2" air gap. The air gap is very important as you are creating a convection oven in the bay then transferring the heat generated in the over through the floor. Yes these types of plates are less expensive but weigh the disadvantages. Slower floor response time, unevenly heat floors and noise. These types of plates tend to tick, tick, tick.
I think you are on the right track. Radiant in the areas without carpet and panel rads in the areas with. The Panel rads will work real well and I think a great choice.
@ November 22, 2009 6:51 PM in Staple up radiantUse 3/8 plates. Hell of alot easier to pull 3/8" over 1/2". The only benefit 1/2" gives you is the ability to run a 50' longer loop length. Max for 3/8 is 250' vs 300' for 1/2". Best advice I can give you. Insulation is your friend and prepare a good control strategy. Keep it simple but do it right. Taco RMB is a good choice. Simpifies pipng and I would also recommend floor sensors. The Wirsbo 511s is a great little set point control. It's programable like a thermostat but also gives you the abuility to look at floor temp, air temp or a combination of both depending on what you a looking for.
@ November 22, 2009 7:42 AM in Vitodens 200 piping ???Through the boiler is 6.2GPM. Your pipe size needs to be able to carry 6.2GPM to the low loss header. 1" pipe will do the job.
@ November 16, 2009 6:49 PM in are all v7 doomed?If you call Burnhams customer service dept they will only tell you whether the boiler is in the warranty period and in what period it is in. You must contact a heating contractor to get any warranty or rebate. Here is how it works.
Burnham will replace a V7 block as per the warranty. You will get a block and a jacket. The contractor will have to strip the current boiler of it's burner and aquastat and put them on the replacement block. He will then have to set the burner up. With labor the next option is a much better one.
The customer purchases a new packaged VH8 or MPO Series boilers and Burnahm will rebate the customer back the amount in dollars that the old V7 is worth.
You must be the original homeowner of the V7 to get any of these options so if your not the original homeowner your on your own.
@ November 16, 2009 6:14 AM in are all v7 doomed?If the boiler is over ten yrs old and it develops a crack the warranty will be pro-rated. Burnham with either replace the block/jacket at a discounted rate based on the age or they will offer a rebate equal to the pro-rated value for you to install a new V8H or MPO series boiler. The rebate is given after installation of a new boiler. Remember you are also responsible for the labor and the replacement must be installed by a contractor. The rebate is the better deal.
@ November 15, 2009 9:20 PM in Condensing Boilers & PVC ExhaustVenting systems do not see the same flue gas temps as condensing boilers. Those companies you stated are all air guys. I believe the talk of using PVC as a vent system is based on the higher flue gas temps we see in hydronic applications.
@ November 15, 2009 5:55 PM in are all v7 doomed?Second Section Mid.....Bad casting. While yes it was a major problem back in the day Burnham stood behind it and made it right.
@ November 15, 2009 5:25 PM in Horizontal buffer tanktomorrow. I'll call you....Chris
@ November 15, 2009 5:20 PM in Condensing Boilers & PVC ExhaustAnd yes PVC and ABS are made to move s***. Ask the manufactures of that pipe. Each and every one of them have sent out statements that say PVC/ABS is not a vent material and that they do not endorese it's product as venting material. Since they make I would think that if they thought it was ok they would endorse it. Plain and simple. I would have to say atleast Viessmann has a vent statement. Can you say the same for any of the mfg that are using PVC as a vent pipe. I have never seen one.
@ November 15, 2009 12:05 PM in Condensing Boilers & PVC ExhaustSome type of reaction going on. The question now becomes, What is the cause? What is this reaction and does it lead to pre-mature failure of a vent system? Can this reaction that the pipe is haviing be solved with venting with CPVC instead? If so, then why wouldn't we vent with CPVC vs PVC. The anwser to proper venting material should not be associated with the cost of the venting material but with saftey for the consumer.
@ November 15, 2009 11:55 AM in Boiler pressure issuesWhat supplies your domestic hot water needs?
@ November 15, 2009 10:26 AM in Boiler pressure issueshave a tankless coil in it? Does this only happen when a particular zone is calling? Is there a check vlv somewhere that is stuck closed? I
@ November 15, 2009 9:51 AM in Condensing Boilers & PVC ExhaustHave you cut is out and replaced? That would be a nice example to send out for some testing.
@ November 15, 2009 9:40 AM in Condensing Boilers & PVC ExhaustThat pipe is CPVC and I-Pex is the only maker to this point that is actually marked as vent pipe that is UL rated and Canadian rated for venting a gas boiler. I have it in stock. The question I pose to potential customers that always say it's cheapier to vent PVC I say, why would you vent a high efficiency appliance with a pipe that is made to move s****? Your installing a high end piece of equip so shouldn't the vent material be of the same quality? It's funny how people say it's expensive, it's expensive compared to what? With Viessmann we are selling a heating system not just a boiler.
In the last month I have guys that went up against other competitors wall hungs with the Vitodens 100 and that is generally the number one question from homeowners. My guys hand that vent statement to the customer and explain why. The consumer in every case wanted the Viessmann. Consumers take the safety of their famlies very seriously. I didn't know there was a price on that. In the big picture, isn't it the choice the consumers concerning what type of vent product they would choose based on the recommendations of the contractor? Shouldn't that choice be on saftey and not price?
@ November 15, 2009 7:53 AM in Condensing Boilers & PVC ExhaustWhile the attachement was put out by Viessmann and there stance on venting PVC it gives you a picture of why they don't recommend it.. I believe in the near future venting with PVC/ABS may be a thing of the past. There is some discussion going about making this a reality.
@ November 14, 2009 11:13 AM in burnham revolution questionL8148E1299 Burnham Part #61306001
This is OEM only. Checked Honeywell cross ref...
@ November 13, 2009 6:41 PM in radiant thermostatNon electric utilizing indoor reset controlling a simple diverting vlv.