Four wires on a cooling fan?

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boulderguy

Silver - Posts: 510

Joined: April 17, 2005

Location: United States

Posted: July 08, 2005 at 1:50 PM / IP Logged

I have a couple fans from PartsExpress, squirrel-cage type. They have four wires each coming off them. HELP!

Red & black, that's easy. Then there's brown, which when given B+, doubles fan output.

Last there's a yellow wire, trial & error hasn't shown me what it does (no effect when given B+ or ground). Any ideas?

Model "gamma30" by Nidec, Japan.

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xaudiopipex

Copper - Posts: 66

Joined: June 23, 2004

Location: United States

Posted: July 08, 2005 at 10:40 PM / IP Logged

does the fan still work without that wire hooked up?

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Mad Scientists

Silver - Posts: 380

Joined: February 07, 2004

Location: United States

Posted: July 09, 2005 at 7:12 AM / IP Logged

Possibly a tach lead or fan speed alarm.. I don't know that hooking up the brown wire to B+ is a good thing..<grin>

http://www.nidec.com/designoptions/options.htm#

Jim

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boulderguy

Silver - Posts: 510

Joined: April 17, 2005

Location: United States

Posted: July 09, 2005 at 12:50 PM / IP Logged

Looks like the brown wire is a variable input, maybe. Haven't tested that yet. This is one of those great "what does THAT wire do" questions. I'll probably just run it on low speed, I think it's plenty. Thanks for the input.

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swamprat323

Gold - Posts: 1,335

Joined: September 22, 2002

Location: Florida, United States

Posted: July 10, 2005 at 6:03 PM / IP Logged

call up partexpress see if they know.

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compaq

Member - Posts: 6

Joined: July 20, 2005

Posted: July 20, 2005 at 5:59 AM / IP Logged

One of the other wires could be for an automatic temp sensor to turn the fan one like in most newer cars. Or for a variable resitance switch sort of like a dimmer switch. i dont know but thats the best i can come up

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Four wires on a cooling fan?

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