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-   -   Thermostat wiring diagram or directions (http://www.diychatroom.com/f18/thermostat-wiring-diagram-directions-154476/)

Papa Smoke 08-22-2012 10:15 AM

Thermostat wiring diagram or directions
 
I have four Honeywell TL8230A1003 LineVoltPRO 8000 Programmable Thermostats. It turns out I have one room which will need the dpst completely. The other three rooms have existing spst thermostats (One red wire & one black wire).

What is the best way to wire my new thermostats (Two red & Two Black wires) into the old boxes which have the one red & one black wire?

I KNOW I should have bought SPST in the first place but I am married and SHE said they all had to match.....well, if you are married, you already understand!

gregzoll 08-22-2012 12:08 PM

I am married, and no I do not understand. And no, it really does not matter if they match, since if they worked before, why fix it.

Stubbie 08-22-2012 12:53 PM

Quote:

Originally Posted by Papa Smoke (Post 993946)
I have four Honeywell TL8230A1003 LineVoltPRO 8000 Programmable Thermostats. It turns out I have one room which will need the dpst completely. The other three rooms have existing spst thermostats (One red wire & one black wire).

What is the best way to wire my new thermostats (Two red & Two Black wires) into the old boxes which have the one red & one black wire?

I KNOW I should have bought SPST in the first place but I am married and SHE said they all had to match.....well, if you are married, you already understand!

Well ..... its a 240 volt douple pole line voltage thermostat so your going to have to bring another black and red (2 wires ) from the power source to that thermostat. As it is and assuming your baseboards are 240 volt and not 120 it is only breaking one leg of the 240 circuit. Are you sure what voltage your baseboards are ?

Why would you blame your wife for something that is obviously not HER fault ?

Papa Smoke 08-22-2012 08:42 PM

My wife insisted I buy MATCHING thermostats. (Besides, I try to blame her as often as I can....) (This is called sarcasm, friends...humor):laughing:

I am pretty sure I do NOT need to run two more wires. An electrician told me there IS a way to do it to code. Unfortunately, he died a short while back so I can't ask him again.

stickboy1375 08-22-2012 08:50 PM

Quote:

Originally Posted by Papa Smoke (Post 994343)
My wife insisted I buy MATCHING thermostats. (Besides, I try to blame her as often as I can....) (This is called sarcasm, friends...humor):laughing:

I am pretty sure I do NOT need to run two more wires. An electrician told me there IS a way to do it to code. Unfortunately, he died a short while back so I can't ask him again.

Im not sure what the issue is?

Papa Smoke 08-22-2012 09:08 PM

stickboy - I have TWO wires coming into the box(Red & Black). FOUR wires on thermostats (TWO reds & TWO blacks). I want to wire the 4 wire thermostats into the boxes which have two wires. I know that each SET of two wires is one leg. I am looking for the most proper way to do this.

Thanks for asking.:thumbup:

stickboy1375 08-22-2012 10:10 PM

Quote:

Originally Posted by Papa Smoke (Post 994371)
stickboy - I have TWO wires coming into the box(Red & Black). FOUR wires on thermostats (TWO reds & TWO blacks). I want to wire the 4 wire thermostats into the boxes which have two wires. I know that each SET of two wires is one leg. I am looking for the most proper way to do this.

Thanks for asking.:thumbup:

So just break one leg, whats the issue?

Papa Smoke 08-23-2012 07:44 AM

The issue is I am not an electrician but I do want to do it right. My plan is to wire the LINE to the incoming LINE and the LOAD to the LOAD. I am just trying to find out if I should pigtail both blacks and both reds (of the thermostat) together.

I do not think so but I want to be sure.

zappa 08-23-2012 08:15 AM

You have 2 sets of switched contacts inside of your thermos. You can wire them together to share the load for longer life or keep them seperate and have a fresh set if one fails in the future. I don't know, kind of a toss up??

Papa Smoke 08-23-2012 10:17 AM

That is what I thought, too. I am wiring them together for longer life. Why? If I wire them separately, I will have long forgotten that there is still a good side if/when the other goes bad.:eek:

zappa 08-23-2012 08:59 PM

Hey Smoke....disregard what I said in my post. I was thinking that you had a manual 240 volt thermo. Your model needs a constant 240 volts to operate the electronics and I don't think it will work with your 2-wire setups.

Papa Smoke 08-24-2012 07:55 AM

2 Attachment(s)
I decided to clarify this a bit....so....

Here is what is in the wall:

Attachment 56216

Note that there are 4 wires coming in and going out (red, black, white, and copper) and that the whites are pigtailed but never hit the thermostat (SPST)

and here is what the Honeywell (DPDT) wiring diagram says:

Attachment 56217

IF you know how I can properly wire these new DPDT thermostats into the existing boxes, please let me know - explicitly - since I am a bonehead!


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