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Fan Controler for Under $30

SmokeyMacPot

New Member
A little bit of info on what can control shaded pole and other general types of AC motors:

Potentiometer NO
Dimmer NO
Rheostat NO
Solid-State Speed/Power Controler YES
Variable Hertz/Frequency Drive YES

Potentiometers, Dimmers and Rheostats can not be used to control the speed of an AC motor. They all use forms of voltage resistance.
From first hand experience I know that even low draw Hz drives can cost well over $100 (I have seen them as high as $500 at a 1 Hp rating). Hz drives are a waste unless you need to precisely control the speed/pulse of something beyond/below the input frequency (or a capacitor run/start motor). The next best thing is a solid-state adjustment device.

$10-$15 Solid-State Controler (I.e. “fan controller”)
$1.50 #16 (or bigger) extension type cord, with ground (2 feet)
¢80 3/8” cable connectors (x2)[/b]
$5 1 male & 1 female standard rubber 3-prong electrical plug
$3 Deep set 2”x3” electrical box

All of this can be bought at an home improvement store for around the same price (such as Home Depot or Lowes).

Note: you need to have some basic wiring skills to do this.

The first thing you need to do is confirm your not buying a Rheostat or Dimmer. Look at the price and what\'s printed on it (fan controls are more expensive). You need to make sure it says it can control “attic” and/or “whole house” fans. I chose the 100% controllable one, they also make them with a Low/Med/High setting. The next part isn’t much harder, basically all you do is strip your cable & wires and put on your plugs. In this case I already (knowingly) left some on the M/F ends from a previous project. Strip your cable and wires at the other end, then using the supplied wire nuts connect all commons (white wire) together. Connect one hot (black wire) to ether hot lead (black wire coming out of device). Now for the ground/s (green wire) use an extra wire nut. Or you can strip about 2” off all of them and twist them together nice and tight (if you don\'t have a wire nut). Next push the fan controller into the box, before doing so tuck the cluster of grounds under the other wires. There should also be 2 supplied machine screws that you will use to attach the mounting plate to the box.

That’s all there is too it, it can be used just like a regular fan (only now you can adjust the CFM’sspeed).

Notes: Don’t load it to max capacity. In this case using the 5 amp model don’t use it to control a fan/motor the uses more than 4 - 4.5 amps. These CAN NOT control capacitor start or run motors (you would need a Hz drive for that.). When used, the motor will get warm/warm-hot as if it where running regularly, this is normal. Another thing I would do is let the motor run for at least 3 hours (check on it from time to time) on the lowest setting just to make sure it won’t over heat.

AUthor: Moshmont
 
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snailseeker

New Member
Ich bin Elektriker. Dimmers are resistors that reduce the amount of light by reducing the available voltage. Motors (and transformers) are voltage dependent. Speed change is effected by changing the frequency of the electrical signal being applied to the motor circuit. The simplest of these devices accomplish this with capacitors...
 

EgaPega

New Member
how is called that thing which turns on fans depending on temp, what you have set up? i know that once i found it on ebay but i cant find it anymore!
 

jim56g

New Member
I'm not high and this site is.

How does one go about a search?

The threads are stoned.

There is no simple way of contact.

This dropped thread is as good as it gets.

As much as I have enjoyed the journey through the site, I haven't found any real structure to the program.
 

negativeions

New Member
I'm not high and this site is.

How does one go about a search?

The threads are stoned.

There is no simple way of contact.

This dropped thread is as good as it gets.

As much as I have enjoyed the journey through the site, I haven't found any real structure to the program.

Awesome post, reminds me of "Fear and Loathing in Las Vegas" lol
 
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