please help me wire this racing fan

[brahmon]

 aloha all!

just bought this fan to blow massive air when ac is not needed.    directions are of no use since it just plugs into a performance car. 

can i just cut/slice red and black wiresand connect?   also, whatkind of switch do i buy to control in/outand variable speeds?

mahalos!

 

[B and C]

Use a DPDT toggle switch and wire it like this: https://www.quora.com/How-do-you-wire-a-6-pin-toggle-switch

For variable speed you will need a 12V motor speed controller also. Get one rated for at least the 10+ amps that fan will draw in a footprint you can use. If you get a PWM speed controller, get one that works above 21k Hz.

Just cut the plug off and wire like above. Hope it works well for you.

 

[highdesertranger]

how many amps does it draw? most of the big fans need a relay because regular switches just aren't heavy duty enough. also heavy wire with short runs to the battery. but first off amp draw and we can go from there. highdesertranger

 

[XERTYX]

That looks like a helluva air mover bro. 120w even. Where on earth did you find it?

And just to piggyback on B an Cs post you dont need 2 sets of wires running to the motor like in the illustration on the quora site. Wire it exactly like the diagram except omit the wires on A and B and wire A to F and B to E. That way only 1 pair of wires is needed to go to the motor and not 2 pair. I had to figure this out on my own on an old trolling motor I bought as is online and the fwd/reverse switch was broken.

Of course make sure all the wires are of the appropriate gauge to carry 10A of current

 

[highdesertranger]

well if that fan is only drawing 10 amps it really isn't all that heavy duty or moving a lot of air. I thought we were talking a heavy duty high flow radiator fan. those pull 20-70 amps depending on the CFM rating and the size. highdesertranger

 

[MrNoodly]

...also heavy wire..

Would it need to be any heavier than the fan's wires?

 

[XERTYX]

He didnt see in the pic that it was 120w I imagine.

It looks like a heavy duty fan HDR. I think it's the kind like they use in racing dune buggies to run air to the drivers helmet. That sort of think. It's not a squirrel cage blower fan but it looks pretty small for 120w so I'd imagine it'll hum.

 

[highdesertranger]

for some reason Imgur quit working for me a couple of weeks ago. the page will open but there will be no picture just a black screen. but like I said 10 amps is a wimpy radiator fan. highdesertranger

 

[XERTYX]

I didnt think it was gonna work for me either bro. But it finally loaded. Idk. If it is made for racing it might push a fair amount of air. It would surely help.

If it's like the helmet air fans like I think they even have a prefilter to remove dust and still keep the driver cool.

I don't have fantastic fan money so I'm very interested in this project. I'm running 3 fans to keep cool in this hundred degree weather and I doubt I could sustain that usage without shore power.

 

[XERTYX]

This is the OPs pic

 

[brahmon]

sorry guys heres the link:

16" inch Universal Slim Fan Push... https://www.amazon.com/dp/B014KK7LDY?ref=ppx_pop_mob_ap_share

i'll wait for further opinions since i neglected to post link, sorry!

 

[B and C]

You only need 3 things to make that work for your application. Fuse, switch and speed control. DPDT switch on-off-on for positive off if the speed controller doesn't have it (off) built in. Both leads have to be switched to get the polarity of the wires to reverse, hence DPDT switch. The motor is wired to the center pins and the outer pins are wired opposite color to each other. The speed controller is usually just voltage in and voltage out.

 

[B and C]

Here is the option Xertyx describes and like I wrote about above: http://www.1728.org/dpdt.gif

Either way, the two sets of outer terminals are reversing the wire whether its the battery leads or the motor leads. Electrically, they are the same.

 

[highdesertranger]

yeah don't wire it like they show in that Amazon ad, LOL. obviously whoever drew that schematic had no experience what so ever.

basically you can label anything racing. who's going to argue with you? a 120w 12v fan is pretty wimpy as far as radiator fans go. maybe they mean RC car racing.

highdesertranger

 

[B and C]

The one linked to at Amazon is only 80 watts for a 16 inch fan so less than 7 amps.

 

[jonyjoe303]

heres a picture of the fans I use. its 80 watts but only pulls that on start, once running its only 4.5 amps. Your 120 watt fan is about the same uses max only on startup.

I always use toggle switches that can handle at least 10 amps, and the pwm controller(cost about 4 dollars) also must handle 10 amps. I use xt60 connectors.

 

[brahmon]

thx again everyone! hate to trouble you but could someone sketch a basic schematic? im pretty clueless but i learn fast.

 

[XERTYX]

Here ya go. The image after the controller is the modified dpdt switch that B and C posted.

 

[brahmon]

thank you all!! what would i do without you crv maestros?

it is still confusing for a numb nuts like me, but thus is a huge help.

love you guys!!

 

[XERTYX]

No worries bro. Just make sure the wires are sized for 10 amps and you'd probably want to run a fuse from the battery just to be safe. The controller has a fuse already but still.