John Bonnett
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| posted on 27/12/11 at 07:43 AM |
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Radiator thermo switch information please
I'm planning on using two electric fans on my Triumph GT6 Golf radiator installation. I'dlike to set it up so that, using a three terminal
two temperature switch, one fan comes on at the first temperature and both come on when the second (highest) temperature is reached.
So, the question; When the higher temperature is reached are both switch contacts live or just the higher one?
Thank you
John
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snapper
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| posted on 27/12/11 at 07:55 AM |
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Well that will depend on the switch won't it!
There are a lot of different configurations and finding the right one for your needs will take some detective work.
In principle a three connection switch should open one circuit then the second running both fans then turn both off when cool enough.
However there are systems that overlap the turn off and phase on the fans.
one rad I found in a skip had two thermo switches with relays, surface heat sensors and a small pump that moved water within the rad.
I eat to survive
I drink to forget
I breath to pi55 my ex wife off (and now my ex partner)
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John Bonnett
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| posted on 28/12/11 at 07:20 AM |
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quote:
Originally posted by snapper
Well that will depend on the switch won't it!
There are a lot of different configurations and finding the right one for your needs will take some detective work.
In principle a three connection switch should open one circuit then the second running both fans then turn both off when cool enough.
However there are systems that overlap the turn off and phase on the fans.
one rad I found in a skip had two thermo switches with relays, surface heat sensors and a small pump that moved water within the rad.
Not the reply I was looking for but thank you for considering the question.
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ken555
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| posted on 28/12/11 at 10:36 AM |
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I used a switch off a VW Jetta, it has what you are wanting. (1st contact make, then both contacts make).
It's a standard M22 thread, but I broke open the plastic end tank on the Jetta and that gave me a boss I could solder onto the Allegro !
radiator I'm using.
If you look here http://www.tridon.com.au/Products/Product.aspx?SG=8&S=35&G=483&P=2014 you can find the switch diagram, then
find what UK car its also used on.
http://www.tridon.com.au/databank/documents/Switch-Application-list'05.pdf
[Edited on 28-12-11 by ken555]
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John Bonnett
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| posted on 28/12/11 at 11:00 AM |
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quote:
Originally posted by ken555
I used a switch off a VW Jetta, it has what you are wanting. (1st contact make, then both contacts make).
It's a standard M22 thread, but I broke open the plastic end tank on the Jetta and that gave me a boss I could solder onto the Allegro !
radiator I'm using.
If you look here http://www.tridon.com.au/Products/Product.aspx?SG=8&S=35&G=483&P=2014 you can find the switch diagram, then
find what UK car its also used on.
http://www.tridon.com.au/databank/documents/Switch-Application-list'05.pdf
[Edited on 28-12-11 by ken555]
Ken my boy, you're a star. Thank you very much. I just needed to know if when the higher temperature is reached that both contacts are live.
Useful link too which I'll put into my refernece library.
regards
John
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BenB
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| posted on 28/12/11 at 11:07 AM |
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If you buy a switch and you find it's only one switch at a time just get some diodes and bobs your uncle. You'll get a slight voltage drop
across the diodes but hey ho.
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