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Chris

Chris

Joined on December 29, 2008

Last Post on July 29, 2014

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You Need

@ December 21, 2009 9:53 AM in New room radiant heat

a  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.

I''ll have to think

@ 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.

I'll Give It a try

@ 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

Hail Mary

@ December 20, 2009 7:36 PM in snow melt

I 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.

What Does High Efficiency Hydronics Mean?

@ 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
http://www.plumbingengineer.com/jan_08/hydronics.php
Was curious to hear what the regular posters thoughts are? Hot Road makes some great points in the article.

My thoughts.

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.

One of the Rules

@ December 20, 2009 5:49 PM in Misguided person

Is 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.

Was 9/11 News

@ December 20, 2009 4:22 PM in Misguided person

To 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.

Terry, KBH

@ December 20, 2009 3:21 PM in Taco VDT Pump

Try this to get a hold of John johbar@taco-hvac.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

Welcome to the Site

@ 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.

Terry

@ December 20, 2009 1:46 PM in Taco VDT Pump

Did 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.

Here's Taco Wiring Guide

@ December 20, 2009 11:12 AM in Modine and Taco

The attached wiring guide has what you are looking for.

Noticed a Note on that schematic

@ December 20, 2009 10:47 AM in Control ZV - What Tells the Boiler to Come On

States 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.

You may want to consider

@ December 20, 2009 10:35 AM in adding baseboard

Using 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. 

Leaving Out that Insulation

@ December 20, 2009 10:24 AM in snow melt

Hurt 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.

Rule of Thumb

@ December 20, 2009 7:58 AM in adding baseboard

The 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.

Dave and Bill

@ December 20, 2009 7:29 AM in Taco VDT Pump

The 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.

Baseboard Ouput

@ December 20, 2009 7:01 AM in adding baseboard

Is 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.

Cast Iron and Fin-Tube

@ December 19, 2009 6:44 PM in Using a Mod-Con with Cast Iron Radiators and Finned Tube Radiation

I recently designed a system as this for one of my contractors. We used a Viessmann Vitodens 200. The boiler control can run 2 heating curves plus domestic hot water. We used the boilers reset for the fin tube curve and a motorized modulating 3-way mixing valve that plugs into the control  for a second heating curve for the cast iron zones. We zoned pumps. I would rather use a low loss header/hydro seperator for mod-cons vs primary/secondary. This eliminates the temperature drop between zones when multiple zones call and it promotes condensing. Primary/Secondary is great when you have a cast iron boiler and need some boiler protection. 

Make sure you do a heat loss. If you decided to primary/secondary its a good idea to figure out each zones loss and make sure that the amount of radiation can cover the loss when multiple zones are open. You will with primary/seconday have a supply water temp difference in each zone when multiple zones are calling.

I hope not

@ December 19, 2009 6:26 PM in Do water baseboard heat systems ever share hot water with the tap hot water?

If you turn on the hot water tap without cold water you would get instantly burnt. What type of boiler do you have? Does the boiler have a hot water coil in it? Take a few pics and post.

Comment on the Article Woman Pays Sout Jersey Gas Bills

@ December 19, 2009 4:30 PM in Comment on the Article Woman Pays Sout Jersey Gas Bills

I would be curious to know what brand of heating system this was. Back in the day and in times of no heat we walk out to the warehouse and strip a piece of equipment for the part and put it back in when it came in. Matter of fact did this exact same thing a week ago for someone that has his electrician fry his boiler controls and sensors. No heat means you do what is necessary to get the customer heat. Who cares if its a warranty issue. There is also a thing called UPS Next Day Air Saturday,

Curious also know if a manufacture sells direct to this utility company or if they have to buy from the same supply house as the rest of the trade do.

The Zone Control

@ December 19, 2009 3:24 PM in Control ZV - What Tells the Boiler to Come On

If your plan is to zone all zone valves then buy a Taco ZVC-406 or equiv. Wire the zone valves and therm per the wiring diagram and take the end switch from the zone control to RT on the boiler.

Thank You

@ December 19, 2009 10:12 AM in Mark Eatherton

for taking the time to respond. Look forward to reading the link you provided. We have the same issue here. No liciensing by the state yet certain municipalites require their own. Electrical contractors were just being required to obtain their license this past July in Orange County NY looks like they are attempting to hit our trade next. Thanks again and happy holidays to you and your family.