Joined on December 29, 2008
Last Post on April 23, 2014
@ December 22, 2009 6:29 PM in radiant helpIf your using a zone valve relay the circulator needs to be wired as a system pump. The end switch from the control is wired to TT at the boiler. I believe on an Argo Zone relay there are 2 sets of ends switchs. You should be able to use end switch 2 to power a pump. End switch 1 goes to TT on the boiler. Go to Argo Industries web site. I'm sure there is a manual there.
@ December 22, 2009 6:14 PM in When is Delta T for heating not a true Delta T??Mark I enjot reading your posts. What makes this site great to me is the education you find in each post. I have been in the industry since 1989. So of consider this back in the day. Back then most supply houses were owned by mon and pop. There was always something educational going on. With corporations buying up these type of supply houses the of education you can get just from reading the posts here is priceless. Keep up the great work.
@ December 22, 2009 4:00 PM in Munchkin Contender Heat ExchangerAn thrown on my counter this morning by a contractor. Looks like it was dry fired a few times by the twisting. I'm thinking that the condensate had no where to run. It leaked onto the control and fried that also. Sending it back to Munchkin..I'll let you know what they think.
@ December 22, 2009 7:29 AM in Munchkin Contender Heat ExchangerThe attached pics are from a MC-80 installed 2 yrs ago. That heat exchager took a beating. Took the pics this morning.
@ December 22, 2009 6:09 AM in When is Delta T for heating not a true Delta T??I enjoy your posts. Keeps the mind fresh. I was stumped on this one. Keep up the great work.
@ December 21, 2009 9:53 AM in New room radiant heata system pump after the mixing vlave for the radiant. What size. Generally a Taco 007 or Grundfos 15-58 but pump sizing is dependent on heat loss, flow rates and head of the system. Without knowing these parameters, your rolling the dice.
@ December 21, 2009 7:46 AM in When is Delta T for heating not a true Delta T??this out throughout the day. I'll get you an anwser tonight. Buys day today..Alot of no heats.
@ December 20, 2009 7:59 PM in When is Delta T for heating not a true Delta T??I have a questions first. What time value are you stamping on that room side temp?
Ti-To divided by R-Value = Heat Loss of an outside panel
Ti = Temp Indoor
T0= Temp Outdoor
I would have to have a R-value that exceeds Ti in order to have no loss at all. But I'll bite and say. For under 15 minutes a 2.77 for 3 minutes a .55
@ December 20, 2009 7:36 PM in snow meltI would take Mark up on his willing to help you out of a big jam. Your sitting on the 50 with 1 second left. If I'm thinking correctly Mark is going to tell you how to stretch that delta-t to get some btu's out of that melt.
@ December 20, 2009 6:42 PM in What Does High Efficiency Hydronics Mean?I came across this nice article Hot Rod published back in 08
Was curious to hear what the regular posters thoughts are? Hot Road makes some great points in the article.
High efficiency hydronics starts with a heat loss, piping, control and design strategy that in the case of replacement system lowers fuel consumption by 20 percent or more. In the case of new construction the heating equipment if oil must be a minimum of 87% AFUE and gas 90%. My feeling is that no piece of heating equipment that is any less is not even in the equation.
@ December 20, 2009 5:49 PM in Misguided personIs not to discuss politics. I respect those rules so I have to forgive my full rebuttal. I will say, what happend on 9/11 was a tragedy for American but across the world was no different then the bombing of embassys or the bombing of market places in other parts of the world. What Madoff did had an impact on individuals, charity's, businesses and governments across the world.
@ December 20, 2009 4:22 PM in Misguided personTo me that wasn't news. We all lived every second of it. It was a historic time in our lives. An event that will never be forgotten. To me news is something that we all are not aware of. The biggest news of the decade to me was Madoff. The impact of what he did had an impact on more lives ten fold. It had such an impact on our economy that it's effect is still being felt today. Yes, the 9/11 victims families will never forget and neither will I but my vote goes to the Madoff scam.
@ December 20, 2009 3:21 PM in Taco VDT PumpTry this to get a hold of John email@example.com I recevied an e-mail from his this morning concerning this issue. They are aware of a problem and believe they have it fixed. I'm sure he would like to know the application and would want the pump back
@ December 20, 2009 3:13 PM in New to boilers - what do I do?Normal operation would not have the water set to 140 degrees. This would mean that you return water temp would be 120 degrees which is not good for a cast iron boiler. Minimum return temp should be 140 not the supply temp. As far as your feed goes. We do not have to feed hot water boilers any longer. The feed valves today make sure that the system maintains the 12PSI it is suppose to be operating at automatically. Check the brand and model number of that feed valve and make sure it is a Watts S1156 or B&G FB38. These are the most common.
@ December 20, 2009 1:46 PM in Taco VDT PumpDid you send the pump back. I recevied an e-mail from John Barba and I'm sure he would like to hear the application. You should give him a call at Taco or send him an e-mail via Taco's site. He is interested in what the problem is.
@ December 20, 2009 11:12 AM in Modine and TacoThe attached wiring guide has what you are looking for.
@ December 20, 2009 10:47 AM in Control ZV - What Tells the Boiler to Come OnStates that you must maintain 100 gallons per hr flow rate? Equates to minimum flow rate of 1.7 GPM. If any of those zones are less than 17,000 btus (based on a a 20 degree delta-t) I would make sure I use a low loss header/hydro seperator. I'm not a fan of primary/secondary with a mod con.
@ December 20, 2009 10:35 AM in adding baseboardUsing a modulating mixing valve that gives you outdoor reset. Viessmann makes a nice control for this and you could also add indoor feedback. You could do the same with Tekmar controls. You could really finetune. Of course it all depends on budget.
@ December 20, 2009 10:24 AM in snow meltHurt you alot. Could have done it had you insulated. Like the others state be real careful. Your oil or gas company is going to be you new best friend once you start firing that driveway up. Your wife will love you though. You just gave here some turf conditioning along the sides of that driveway. She can grow some pretty flowers all year round now.
@ December 20, 2009 7:58 AM in adding baseboardThe basic rule of thumb for savings. For every 3 degrees I can run my system under 180 degree water I can save 1 percent of fuel. If I design properly and my boiler supply water temp max is 140 degrees that is a 12% fuel savings if that was constant. Now think about how many heating days your at design. Maybe 5 if your lucky in my area. In the system in my previous post I'm betting on an average water temp of 125 or so. That equates to almost a 20% savings. Plus I'm condensing the whole season so my efficiency rating stays alot closer to that 95% rating versus a boiler designed for 180 or so. At 180 your really only running at around 87 to 90 percent. It boils down to system efficiency. Everyone gets caught up in AFUE. I feel that system efficiency is more important. It's what you do with the energy produced by your fuel dollars that counts.
@ December 20, 2009 7:29 AM in Taco VDT PumpThe first pump already went back to Taco. The second will get back to them this week. They are very interested to in trying to find the cause. I will let you guys know what I find out.
@ December 20, 2009 7:01 AM in adding baseboardIs based on a combination of flowrate and water temp. Providing you do a heat loss of the home and break out the loss of each zone you can run what ever temp you want as long as the board is sized correctly. I posted about a job the other day, Fin tube board with mod-con. Temp outside was 27 degrees, the boiler temp 108 and a system supply water temp of 98 through the board and the house was 70 in all 5 zones. Thursday night here is was 7 degrees. Boiler temp was 135 and system supply temp 128. It all comes down to design. There is a de-rating chart that Meztek, the makers of SunTemp, Embassy and other boards gave me. It' will give you the factors to calculate the output of board all the way down to 100 degree water at a 1gpm flow rate. You then use the flow rate correction factors to get your output.
If you are deciding to try this. I would also use a high output board. It will give you much more flexability in water temps.