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Home built Air Conditioner relay question

 
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fbeal
Newbie


Joined: 12 Apr 2008
Posts: 2

PostPosted: Sat Apr 12, 2008 6:30 am    Post subject: Home built Air Conditioner relay question Reply with quote

I am building a simple AC system for my home. I have 50 degree groundwater at a depth of 5 feet. I plan to circulate the cold water through a heat exchanger (radiater) mounted in a ventilation duct. There will also be a fan to circulate the air.

I want to control the fan and pump using a standard wall mounted thermostat (low voltage).

I am not very knowledgeable about components but I know I will need some sort of relay to turn the fan and pump on and off when activated by the thermostat.

I planned on using standard 110 volt supply for the fan and the pump motors.

What kind of relay would be good for this and where would I get one?
________
extreme vaporizer


Last edited by fbeal on Thu Feb 03, 2011 1:17 pm; edited 1 time in total
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Turd
HG Ruler


Joined: 18 Aug 2007
Posts: 274
Location: Saskatchewan, Canada

PostPosted: Sun Apr 13, 2008 6:25 am    Post subject: Reply with quote

I don't know much about high current relays but maybe you could pull one out of an old appliance like a furnace, washing machine, dryer, etc. Very Happy


eric
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Project_Nightmare
HG Master


Joined: 12 Oct 2007
Posts: 119
Location: Gig Harbor, WA

PostPosted: Mon Apr 28, 2008 9:05 pm    Post subject: Reply with quote

What the voltage and ampage does the system take? This is important for selecting the relay for the project because you can destroy the relay if the system goes over the relays ratings. The themometer switch shouldn't be that much of a problem since there are alot of schematics on how to make them Very Happy

I, unlike my friend Turd, know alot about relays. And using one from an existing machine might not be the best idea Cool
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fbeal
Newbie


Joined: 12 Apr 2008
Posts: 2

PostPosted: Tue Apr 29, 2008 5:41 am    Post subject: Reply with quote

Thanks. A friend of mine told me what I needed to get.

I ordered a relay online that will handle the 7.5 millivolt signal and operate the 110 volt line. It has 12 amp capacity. (model #750-2c-120A from automation direct). I also bought a socket that fits it to enable me to attach the wiring. Total cost with shipping was $40.

Thanks
________
ER-5


Last edited by fbeal on Thu Feb 03, 2011 1:17 pm; edited 1 time in total
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Project_Nightmare
HG Master


Joined: 12 Oct 2007
Posts: 119
Location: Gig Harbor, WA

PostPosted: Tue Apr 29, 2008 8:57 am    Post subject: Reply with quote

Hope you luck on your project Very Happy

Also, you might want to take a look at swamp coolers while your at it.

http://en.wikipedia.org/wiki/Swamp_cooler
http://overclockers.com/articles389/
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