weather response boiler control

Reply

  #1  
Old 11-15-08, 01:52 PM
Member
Thread Starter
Join Date: Dec 2002
Location: Michigan
Posts: 115
Upvotes: 0
Received 0 Votes on 0 Posts
weather response boiler control

I am considering a Tekmar boiler control to adjust water temps with outside weather. Anybody have suggestions.
 
Sponsored Links
  #2  
Old 11-15-08, 03:06 PM
Member
Join Date: Oct 2008
Location: USA
Posts: 2,867
Upvotes: 0
Received 5 Votes on 5 Posts
That will work. Taco makes a similar boiler reset control.
Doug
 
  #3  
Old 11-15-08, 03:51 PM
Member
Thread Starter
Join Date: Dec 2002
Location: Michigan
Posts: 115
Upvotes: 0
Received 0 Votes on 0 Posts
Thanks,
I have Taco zone and pump and they have been realiable, do you have a model #?

Originally Posted by gilmorrie View Post
That will work. Taco makes a similar boiler reset control.
Doug
 
  #4  
Old 11-15-08, 04:25 PM
NJT's Avatar
NJT
NJT is offline
Member
Join Date: Oct 2006
Location: USA
Posts: 23,539
Upvotes: 0
Received 1 Vote on 1 Post
Before you decide on a control, it's probably a good idea to know what you want to accomplish...

What you do with outdoor reset depends a whole lot on the boiler system and how it's piped ... you need to understand the difference between PARTIAL reset, and FULL reset ... you don't wanna run your boiler cold enough to condense ...

What do you have ? boiler ? radiation ? how piped ? etc ...
 
  #5  
Old 11-15-08, 04:40 PM
Member
Thread Starter
Join Date: Dec 2002
Location: Michigan
Posts: 115
Upvotes: 0
Received 0 Votes on 0 Posts
I have a 30+ year old boiler with 6 zones that works great. I have 3/4 copper piping with convecter in every room including garage. I have been keeping the temp at 180F but now am looking at a reset system. What is the advantage & difference of the two systems? I want to lower costs but keep my comfort the same.

Originally Posted by NJ Trooper View Post
Before you decide on a control, it's probably a good idea to know what you want to accomplish...

What you do with outdoor reset depends a whole lot on the boiler system and how it's piped ... you need to understand the difference between PARTIAL reset, and FULL reset ... you don't wanna run your boiler cold enough to condense ...

What do you have ? boiler ? radiation ? how piped ? etc ...
 
  #6  
Old 11-15-08, 06:39 PM
NJT's Avatar
NJT
NJT is offline
Member
Join Date: Oct 2006
Location: USA
Posts: 23,539
Upvotes: 0
Received 1 Vote on 1 Post
What is the advantage & difference of the two systems?
I'm not real sure which "two systems" you mean?

some definitions:

A RESET system will modify a temperature setting based on some external variable.

BOILER reset vs. SYSTEM reset ...

Boiler reset modifies the boiler temperature in response to external variable.
System reset modifies the temperature of the water going to the heat emitters (the system).

OUTDOOR reset specifies the external variable, but doesn't specify boiler or system, could be either, or both.

I believe what you are talking about is OutDoor Reset (ODR).

PARTIAL reset vs. FULL reset

Both refer to the range of temperature that will be allowed.

Partial reset LIMITS the range of the temperature setback such that the boiler doesn't get cool enough to condense the flue gases.

Full reset, there is no limit. If the control decides it can heat the home with 80 water it will do so ... BUT, you need some fancy 'creative' piping to allow it to do so, otherwise your boiler will be a pile of rust in a few short years.

With your system, you will only be able to use PARTIAL OUTDOOR BOILER RESET. If you decided to spend thousands, you could have all the 'near boiler' piping re-done with primary/secondary, variable speed injection pumps, and lots of other fancy sounding stuff, and be able to run FULL reset.

You will only be able to drop the temperature on the boiler to perhaps 160 ... not that the 20 won't save you anything, it definitely will ... I wouldn't go lower than that with a gas fired system... if you are burning oil, you might get away with 150, or maybe even 145 ... but you would have to pay attention to the return water temperature to make sure it isn't running too cool ...

With a 30+ year old boiler, I would go bare bones, and when time came to replace, consider an upgrade to the piping ... and a condensing boiler ...
 
  #7  
Old 11-15-08, 06:50 PM
Member
Thread Starter
Join Date: Dec 2002
Location: Michigan
Posts: 115
Upvotes: 0
Received 0 Votes on 0 Posts
What kind of piping are you referring to? The circulating system or the vent & exhaust ?


Originally Posted by NJ Trooper View Post
With a 30+ year old boiler, I would go bare bones, and when time came to replace, consider an upgrade to the piping ... and a condensing boiler ...
 
  #8  
Old 11-15-08, 07:06 PM
NJT's Avatar
NJT
NJT is offline
Member
Join Date: Oct 2006
Location: USA
Posts: 23,539
Upvotes: 0
Received 1 Vote on 1 Post
The hot water piping ... not much you can do with the exhaust...

There are lots of different piping 'schemes' out there. Some just pump water ... some 'mix' the water to a set temp ... some create hydraulically separate 'circuits' ... from simple to very complex.

Some will save more fuel than others ... but at what cost ? and how long to payback ?

Keep your piping all the same, install an OutDoor Reset, but limit the BOIL MIN to 160 or so ... save what you can, don't cause problems by trying to run too cool.
 
  #9  
Old 11-15-08, 07:20 PM
NJT's Avatar
NJT
NJT is offline
Member
Join Date: Oct 2006
Location: USA
Posts: 23,539
Upvotes: 0
Received 1 Vote on 1 Post
Tekmar 260 will do what you want ...
 
  #10  
Old 07-11-09, 04:00 PM
Member
Join Date: Jul 2009
Location: New York
Posts: 21
Upvotes: 0
Received 0 Votes on 0 Posts
You can always go with indoor reset and have even comfort too.
 
  #11  
Old 07-11-09, 04:10 PM
Member
Join Date: Jul 2009
Location: New York
Posts: 21
Upvotes: 0
Received 0 Votes on 0 Posts
There are basically two approaches. First you have to know if you are maintaining a tankless domestic Hot Water system or an indirect hot water system. Second you have to know what the minimum return temps will be to avoid the condensation of exhaust gases on the fireside of the boiler. If the boiler is not supplying Domestic Hot water you can cold fire the boiler. The only thing you need to do here is to assure that the high limit when the boiler goes off is above 140 degrees. What do you have??


Originally Posted by redvett View Post
I have a 30+ year old boiler with 6 zones that works great. I have 3/4 copper piping with convecter in every room including garage. I have been keeping the temp at 180F but now am looking at a reset system. What is the advantage & difference of the two systems? I want to lower costs but keep my comfort the same.
 
Reply

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread
Display Modes
 
Ask a Question
Question Title:
Description:
Your question will be posted in: