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Author Topic: Wiring a two speed blower  (Read 2614 times)
420oclock
~Bud Meister~
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« on: April 18, 2008, 07:20:21 AM »

Hi all.
I have a Dayton Blower that is two speed. I have wired single speed blowers, but this one has an extra wire shocked and I cannot find a switch that seems applicable at HomeDePot.

Any electricians out there?
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Dr3yec
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« Reply #1 on: April 18, 2008, 10:07:57 AM »

I found this doing a search on google. Might help you out. I would wire for high speed and buy a dimmer plug in switch. Hope this helps.

White Wire: Common
Black Wire: High Speed
Red Wire: Low Speed
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420oclock
~Bud Meister~
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« Reply #2 on: April 18, 2008, 10:20:20 AM »

Hey, Dr3yec. I thought about doing it like you described, but I have heard that using a dimmer on an electric motor is not a good idea. (I forget why...amperage or something).   

In the meantime, I've mounted the Dayton to exhaust my grow outdoors, to help cool things in the summer. I've also attached ducting and a filter http://www.htgsupply.com/viewproduct.asp?productID=52570
so that my property doesn't smell good. weed
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bi polar bud
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« Reply #3 on: April 18, 2008, 04:00:13 PM »

You could mount an double pole/ double throw switch in a convenient place so you can have hi/low speeds at your fingertips.
Make sure the wireing is heavy enough to not be a hazard. Good luck.

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RevFunk
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« Reply #4 on: April 18, 2008, 04:45:40 PM »

hmmm.....i like Dr3yec's idea........no matter how ya wire it......use a rheo-stat to control the speed at will................rheo-stat's are very effective.

rev
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GaGrown
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« Reply #5 on: April 19, 2008, 12:31:40 AM »

Rheostats, like potentiometers are glorified variable resistors. While they can be used to adjust the speed of a DC motor, its a big no-no on AC motors. AC motors need to run at preset voltage, motor speed, and current draw. It is a balanced system...

Be careful with that rheostat.It could possibly burn down your house..

Ga......
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Ga Grown!
GaGrown
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« Reply #6 on: April 19, 2008, 01:13:57 AM »

rowroom design and set-up 
Fan controler for under $30
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.
 
Ga........
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Give a Man a Fish,You feed him for a day... Teach a Man to Fish,You feed him for life.

Ga Grown!
RevFunk
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« Reply #7 on: April 19, 2008, 02:21:34 AM »

AMEN Ga........danks for the heads up............i use rheostats for other purposes around the house (reptile tanks)...........didn't know that about the AC vs. DC...................i'm taking notes!

rev
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GaGrown
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« Reply #8 on: April 19, 2008, 03:05:42 AM »

You could mount an double pole/ double throw switch in a convenient place so you can have hi/low speeds at your fingertips.
Make sure the wireing is heavy enough to not be a hazard. Good luck.



Polar,
 Ya got 2 kinds of double pole switches.. One being a double pole single throw and the one you mentioned.You find that type in alot of mobile homes with older panels.. If you wired the fan to a double pole double throw switch you can only control the fan at 1 speed and either on or off.Reason being that the fan has to be wired so that it runs at low or high speed.One or the other not both at the same time..

Ga..... peace
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Give a Man a Fish,You feed him for a day... Teach a Man to Fish,You feed him for life.

Ga Grown!
Dr3yec
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« Reply #9 on: April 19, 2008, 07:33:23 AM »

Good stuff Gagrow! You just taught this old dog some new tricks. K+ to you bro.
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420oclock
~Bud Meister~
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« Reply #10 on: May 06, 2008, 09:42:47 AM »

Thanks everyone for the suggestions!

Here is the switch I got:
http://www.grainger.com/Grainger/items/1DGZ9
Works great! thumbsup
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GaGrown
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« Reply #11 on: May 06, 2008, 12:54:47 PM »

Thanks everyone for the suggestions!

Here is the switch I got:
http://www.grainger.com/Grainger/items/1DGZ9
Works great! thumbsup
Good choice! That is a whole house switch! One being for an attic fan.. peace

Ga......
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Give a Man a Fish,You feed him for a day... Teach a Man to Fish,You feed him for life.

Ga Grown!
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