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1

Electronics / Re: RSI (and others) - T-stat help again!!!

« on: December 10, 2014, 05:43:12 AM »

Couldn't wait to the weekend, so went to buddies house and we pulled a new wire then hocked up the two new t-stats.  It worked like a charm.  Thanks to all!!

2

Electronics / Re: RSI (and others) - T-stat help again!!!

« on: December 09, 2014, 01:01:17 PM »

Yes, I agree.  I think we might as well just pull something like a 5-wire and then will have extra for use down the road if needed.

Those t-stats are along the line of what he wants.  Might go with those rather than the old dial style.

Thanks again!

3

Electronics / Re: RSI (and others) - T-stat help again!!!

« on: December 09, 2014, 08:39:31 AM »

RSI, if you don't want to respond to that last post I think I got it figured out after putting it on paper.  So much easier to understand in picture form verses words!!

Thanks again.  I will let you know how it works out after the weekend, if you want.

4

Electronics / Re: RSI (and others) - T-stat help again!!!

« on: December 09, 2014, 08:10:28 AM »

Thanks for speedy reply!!!  I think it will be much easier in this case to run a whole new 5-wire(?) verses pulling an additional 3-wire.

So what about this set up if you have time to ponder right now:

1)  pull an new 5-wire and while removing the old two wire.

2)  wire the furnace to this basic Heat/Cool t-stat to run the furnace gas heat (in case he adds AC sometime down the road):
  http://www.lowes.com/ProductDisplay?partNumber=230858-74493-CT87N1001&langId=-1&storeId=10151&productId=3142157&catalogId=10051&cmRelshp=req&rel=nofollow&cId=PDIO1] [url]http://www.lowes.com/ProductDisplay?partNumber=230858-74493-CT87N1001&langId=-1&storeId=10151&productId=3142157&catalogId=10051&cmRelshp=req&rel=nofollow&cId=PDIO1[/url]

3)  jump this heat only t-stat to the first t-stat to control the blower for the boiler heat:  http://www.lowes.com/pd_230878-74493-CT87K1004_4294821952%2B4294962546__?productId=3142159&Ns=p_product_qty_sales_dollar] [url]http://www.lowes.com/pd_230878-74493-CT87K1004_4294821952%2B4294962546__?productId=3142159&Ns=p_product_qty_sales_dollar|1&pl=1&currentURL=%3FNs%3Dp_product_qty_sales_dollar%7C1&facetInfo=Honeywell[/url]

If that will work could you run through all the connections from the furnace to the first t-stat, then from the first t-stat to the second t-stat so we don't screw it up.  Sorry for the hassle, but "we ain't smart".  Then let me know how much money to send you for your advice!

Mark

5

Electronics / Re: RSI (and others) - T-stat help again!!!

« on: December 09, 2014, 07:41:32 AM »

Thanks so much for getting back to me.  We can pull a new wire.... shouldn't be a problem.  The furnace does have a G post.  If you look back at the original message, it shows what the furnace has for connecting posts.

I would personally prefer the 2 t-stat option (like mine at home).  It is a no-brainer to adjust.... wife even has it figured out!!  I don't he would like the idea of him or his wife having to program a single 2 stage t-stat.

So.... could you explain to a dummies such as us what type of wire to pull and how to hook up a 2 t-stat system. Thanks. 

The install is complete other than this, and would like to get the t-stats wired in so he can start burning wood.  He will be moving in this weekend as well, so the time couldn't be better.

A big THANKS to you and all who have chimed in with help so far.

Mark

6

Electronics / Re: RSI (and others) - T-stat help again!!!

« on: December 08, 2014, 07:01:06 PM »

Thanks for the reply. I don't know if the T-stat is for a heat pump or not, but right now it is wired to a conventional natural gas furnace. He would like the boiler to heat his house via the heat exchanger we put in the plenum of the furnace, but have the gas automatically kick on when the boiler goes out. Pretty standard set up, just don't know how to make that happen through the T-stat. 

Any other advice out there?  Scott, Yoder, SlimJim, and others?  Probably easy for those of you that deal with this regularly, but we don't know how to do it. 

Looking for the simplest way. Wish I had the book "T-stat Wiring for Dummies !"

7

Electronics / RSI (and others) - T-stat help again!!!

« on: December 08, 2014, 08:15:12 AM »

Hi all.  Been lurking for about 5 years now, since I did my install.  Now I am helping a friend, and his T-stat is different than mine and we need some help figuring it out.  Here is what his set up looks like:  There is only 2 wires between existing T-stat and gas furnace (NO CENTRAL AC), a red wire and a white wire.  The existing T-stat (digital w/ batteries) has the following terminals:  W  RH  B  O  RC  Y  G  C.  The furnace has these terminals:  R  C  W  Y  G.  The red wire goes from RH on T-stat to R on furnace.  The white wire goes from W on T-stat to W on furnace.  Also on the T-stat, there is a jumper wire going from RH to RC.  Clear as mud, right?

He wants to be able to use his gas furnace like others do, as a back up if the boiler goes out or cools down too much, in which case the gas furnace would come on at a lower set temp to keep thinks from freezing and such.

So, now the questions.  Can this be done with one T-stat (even if have to buy new one), or will it take the addition of a second one jumped into the first?  I have a second on mine, but with central air and such, I have more wires.  Hoping it not more complicated than that (no relays, aquastats on pipes and such).

Although RSI seems to be the local "go to" guy on T-stats, thanks to any that help in this matter, as neither of us knows much about T-stat wiring.
 
I have learned so much from all of you over the years, and wanted to take this time to thank you all as well.

Mark
His furnace says it was installed in 2005.