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pcg
Joined: 31 Aug 2018 Posts: 411 City/Region: Sherwood
State or Province: OR
C-Dory Year: 1999
C-Dory Model: 22 Cruiser
Vessel Name: C-Quest
Photos: pcg
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Posted: Thu Nov 24, 2022 10:35 am Post subject: thermostat controlled equipment cooling fan |
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There has been discussion in the past about a very small cooling fan that activates when it gets hot, specifically for use in keeping electrical equipment cool. I've searched and can't find the discussion. I believe Dr. Bob (Thataway) is familiar with this device and was part of the discussion. I was going to PM him, but then I thought why not go public with this inquiry in case it helps someone else beside me. So... some info please. Thank you! _________________ Paul |
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thataway
Joined: 02 Nov 2003 Posts: 20858 City/Region: Pensacola
State or Province: FL
C-Dory Year: 2007
C-Dory Model: 25 Cruiser
Vessel Name: thataway
Photos: Thataway
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Posted: Thu Nov 24, 2022 4:49 pm Post subject: |
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I have used "snap discs" for the thermostatic control. They are set at a specific temperature. Otherwise one can use any 12 V. Thermostat, and if the fan is more than a few milliamps (like computer fans), then a 12 volt relay.
This one closes at 90 degrees opens at 80 degrees Easy to insert in a circuit. You can get ranges which suit your application:
When I had a hydronic diesel heater in the Cal 46, I used computer fans, and a wall type of thermostat with control directly. Robert Shaw makes a number these, often with a thermometer. The digital ones are nice, but the mechanical ones work just as well.
_________________ Bob Austin
Thataway
Thataway (Ex Seaweed) 2007 25 C Dory May 2018 to Oct. 2021
Thisaway 2006 22' CDory November 2011 to May 2018
Caracal 18 140 Suzuki 2007 to present
Thataway TomCat 255 150 Suzukis June 2006 thru August 2011
C Pelican; 1992, 22 Cruiser, 2002 thru 2006
Frequent Sea; 2003 C D 25, 2007 thru 2009
KA6PKB
Home port: Pensacola FL |
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pcg
Joined: 31 Aug 2018 Posts: 411 City/Region: Sherwood
State or Province: OR
C-Dory Year: 1999
C-Dory Model: 22 Cruiser
Vessel Name: C-Quest
Photos: pcg
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Posted: Thu Nov 24, 2022 5:04 pm Post subject: |
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thataway wrote: | I have used "snap discs" for the thermostatic control. |
Yes! That's what I was trying to remember. Thank you! |
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ssobol
Joined: 27 Oct 2012 Posts: 3386 City/Region: SW Michigan
State or Province: MI
C-Dory Year: 2008
C-Dory Model: 22 Cruiser
Vessel Name: SoBELLE
Photos: SoBelle
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Posted: Fri Nov 25, 2022 12:42 pm Post subject: |
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I use one of these to control a cooling fan on my boat. It has adjustable set points.
ebay link |
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pcg
Joined: 31 Aug 2018 Posts: 411 City/Region: Sherwood
State or Province: OR
C-Dory Year: 1999
C-Dory Model: 22 Cruiser
Vessel Name: C-Quest
Photos: pcg
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Posted: Fri Nov 25, 2022 2:33 pm Post subject: |
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ssobol wrote: | I use one of these to control a cooling fan on my boat. It has adjustable set points. |
Wow - $5.89 incl. shipping. Just bought one. Thanks! |
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Marco Flamingo
Joined: 09 Jul 2015 Posts: 1155 City/Region: Seattle
State or Province: WA
C-Dory Year: 2004
C-Dory Model: 16 Cruiser
Vessel Name: Limpet
Photos: Limpet
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Posted: Sat Nov 26, 2022 2:29 pm Post subject: |
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I found these to be incredibly fast, accurate, and simple. Search around if you need different temps or NC (normally closed). The little silicone sleeve is required to keep it from shorting to ground if attached directly to a metal surface.
https://www.amazon.com/gp/product/B07PLC3M8V/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
In my application, it's just controls a buzzer/LED light. I don't know about running higher amps through it. Same with the one ssobol shows. My little one can handle >12V sensor input, which it looks like the other thermostat doesn't. Still, the Ebay one is an amazing thermostat for $5.89. |
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