You know, just one of your normal bi-metalic ones you might have in your home. Its got 2 leads on it. I want to wire it into a fan to come on at a certain temp. I assume I cant run 5A through it so I would have to use a relay to run it?
i haven't tried to do that... but i would think one of those car relays for security systems, etc would work just fine. they can be bought on eBay cheap for 10 at a time..
Thanks for the idea...will try that also, as i have lots of the relays, and some thermostats...
You are right, don't try to run 5A. I purchased a relay at a locale auto parts store to run mine and it works fine.
you can also buy a thermostat intended for use with electric baseboard.Can handle plenty of amps.mike
Quote from: mikke60 on March 28, 2012, 01:47:54 PM
you can also buy a thermostat intended for use with electric baseboard.Can handle plenty of amps.mike
This is what I did. I run 12v for the fan through them seems to work great for me.
John
Can someone point me to a particular item or make, model, etc?
Sorry, should have looked first. This should suffice?
http://www.ebay.com/itm/Honeywell-T410A1013-Electric-Baseboard-Heat-Thermostat-/360437283184?pt=LH_DefaultDomain_0&hash=item53ebbc7970#ht_2787wt_819 (http://www.ebay.com/itm/Honeywell-T410A1013-Electric-Baseboard-Heat-Thermostat-/360437283184?pt=LH_DefaultDomain_0&hash=item53ebbc7970#ht_2787wt_819)
Better yet?
http://www.ebay.com/itm/Suburban-RV-Furnace-Thermostat-12V-part-161154-/140656834374#ht_500wt_819 (http://www.ebay.com/itm/Suburban-RV-Furnace-Thermostat-12V-part-161154-/140656834374#ht_500wt_819)
I would go with the first model. The second may not support the amp draw that you may need.
John
I would think that a heating thermostat would work opposite of what you desire. They are designed to turn something on when the temperature drops below a set point. For a fan you would want an AC or attic fan thermostat that will turn the fan on when the temperature is above a set point. I would think that this would work:
http://www.ebay.com/itm/Attic-Fan-Thermostat-120-240VAC-Model-1A22-7-New-/120743373884?pt=LH_DefaultDomain_0&hash=item1c1cddac3c#ht_793wt_1112 (http://www.ebay.com/itm/Attic-Fan-Thermostat-120-240VAC-Model-1A22-7-New-/120743373884?pt=LH_DefaultDomain_0&hash=item1c1cddac3c#ht_793wt_1112)
Mike
Quote from: mikelcan on March 29, 2012, 08:15:15 AM
I would think that a heating thermostat would work opposite of what you desire. They are designed to turn something on when the temperature drops below a set point. For a fan you would want an AC or attic fan thermostat that will turn the fan on when the temperature is above a set point. I would think that this would work:
http://www.ebay.com/itm/Attic-Fan-Thermostat-120-240VAC-Model-1A22-7-New-/120743373884?pt=LH_DefaultDomain_0&hash=item1c1cddac3c#ht_793wt_1112 (http://www.ebay.com/itm/Attic-Fan-Thermostat-120-240VAC-Model-1A22-7-New-/120743373884?pt=LH_DefaultDomain_0&hash=item1c1cddac3c#ht_793wt_1112)
Mike
True
Depending on the use of thermostat I assumed he wanted to turn on a fan in a heat exchange.
Good Point
John
Sorry, I want the fans on the heat exchanger to turn on at 67 or whatever. No AC involved. I should have clarified.
Will the Honeywell work with just 12V? I see it is rated for 120/240. I dont suppose the voltage would really matter, would it?
Quote from: opus on March 29, 2012, 02:51:47 PM
Will the Honeywell work with just 12V? I see it is rated for 120/240. I don't suppose the voltage would really matter, would it?
Yep pretty much what I have.
John
A simple bi-metal thermostat really shouldn't care about voltage. Some fancier thermostats might need power from the furnace, but many of them work on batteries these days.
I had bought some dead simple bi-metal thermostats, but they turned out to be junk. The quality was terrible and the setting wouldn't stay were it was was set. I bought some $15 digital thermostats instead that have batteries. I have yet to try them.
Ok, I will grab a couple of those Honeywell stats. This way I can run the power right to it and not have to deal with relays.