power controller fan

[stillvodka]

I am fitting a fan in my pinto controller, I bought a computer fan but only just realized it is 12volt, so I will use transformer and incorporate it in the enclosure/box , I know this is a simple question for most, but the fan has three wires Black-Red-Yellow , power from transformer leads to the black and red turns the fan on, would the yellow be the earth ?

Thanks

[rad14701]

I am fitting a fan in my pinto controller, I bought a computer fan but only just realized it is 12volt, so I will use transformer and incorporate it in the enclosure/box , I know this is a simple question for most, but the fan has three wires Black-Red-Yellow , power from transformer leads to the black and red turns the fan on, would the yellow be the earth ?

Thanks

That might be a variable speed fan... Most single speed fans only have red and black... The yellow usually feeds through a temp sensor either on the system board or elsewhere... Should either run full speed or not at all without the yellow connected... It appears as though the yellow line gets +V from 0-12V to trigger fan speed, but design specifications vary...

[stillvodka]

Thanks Rad,

Yes your right, connected red black full speed red yellow runs lot slower

I will admit I am not up on electronics, but pretty good following instructions, I about to Finnish wiring up controller to live but have hit a snag, with pintoshines kit you get two power leads, Black and white, I am guessing Black live/white neutral, is this correct ?

[snuffy]

That is correct. Black is hot.

the third wire on the fan is often a speed signal so the temp controller on the computer knows how fast it is spinning. Either way, black (-), red (+).

I wish I had left room for a fan when I built mine. It doesn't get hot enough to do any damage, but it does cause the pot to change values as it warms up, so I have to watch the dials to make sure it hasn't turned itself up....

[stillvodka]

Snuffy
Why don't you cut the side out the enclosure and attach a fan, built in a separate box, piggyback', I have my fan in there for reason of removing hot air from inside the control box, it's not fitted like for a CPU attached to the heat sink, when I had my Sultronics controller it did get really hot with nothing but a heat sink to cool it.

[PartingGlass]

Sorry to bring this one back from the dead, but I felt it was better than starting a new/similar thread.

Before I had ever tried my controller (large DIY kit from Still Dragon (http://stilldragon.com/index.php/diy-la ... oller.html" onclick="window.open(this.href);return false;" rel="nofollow), I assumed the heatsink would get hot so I ordered a 220V / 150mm fan from eBay. After using it a few times, I'm not convinced that it runs hot enough for a fan, but since I've already got it, I've decided to mount it up. My only question is how to wire it up? It's got 2 wires, and I'm confused on where the wires should go; maybe the electrical gurus could point out the numbers my (crude) drawing?

Just guessing here, but I'm thinking I can hook the + wire from the fan to either the "in leg" of the ammeter (orange box on top left) or #3. Then the - fan wire could connect to either of the greens on the SSR, right?

Fan specs:
150mm x 150mm x 50mm
220/240V
rated current - 0.1A +/- 10%
speed - 2600 RPM +/- 10%
airflow - 240 CFM +/- 10%

Will I need anything else (such as a speed controller) to wire this up? If I find that 2600 RPM is too fast/loud/etc, how would I go about slowing it down a bit? If I wire the fan + to the #3 terminal mentioned above, will the speed be somehow controlled by the pot like the amperage for the element?

Thanks in advance.

controller box.png (9.57 KiB) Viewed 1533 times

[Deerhunter]

I would wire the fan to your on/off switch if you have one. The switch should be a DPST (double pole single throw). You need a hot on each side of the fan.

[PartingGlass]

I've got an on/off switch, but I haven't installed it (didn't think I needed it after I got it), but it's a DPST 2-position, 4 terminal switch rated at 15A/250V.

At the moment, in lieu of a switch, I just turn the pot all the way down before plugging in / unplugging the controller.

[Deerhunter]

You are correct with that switch DPST. I was wrong. But I would get that in 30amps.