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Old 07-16-2010, 01:17 PM   #1
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Wiring Solid State Fan Controller


I am planning the wiring of a solid state fan controller I got for my greenhouse exhaust fans.

The wiring diagram included for my model is attached.

My model is this one, albeit I didnt get it from this place:

http://www.amazon.com/Electronics-Va.../dp/B000F9HHTI

Can anyone give me a synopsis of how I should wire this up to my break box? I have a 15 AMP breaker, 12/2 wire (might have some 12/3 available too, maybe), the controller and the conduit to run it.

My quandry is that I have two fans, 4.5 AMPS each, SS controller is 15 AMP, so I wanted to have two recepticales that would be powered via the SS controller so that I could plug the exhaust fans into the outlets and have them both controlled from the single controller. The fans are corded and not long enough to reach each other for a single recepticle unless I use extension cord.

Thoughts?

HELP!!! My plants need air
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Old 07-16-2010, 03:32 PM   #2
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Wiring Solid State Fan Controller


"
Not to be used with Capacitor Start or Capacitor Run Motors

Applications: Fans, Blowers, Fireplace Blowers, Attic Fans, Humidifiers, Ventilators

for shaded pole and PSC motors.

Motor must be run with sufficient torque to prevent stalling
"

I would fuse each motor separately at 6 A or so to protect the speed control. You may have to experiment with fuse size and whether its reaction time is normal blow, fast blow or 'slo-blo'.

Can you post links to your fans?


Last edited by Yoyizit; 07-16-2010 at 03:36 PM.
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Old 07-16-2010, 03:48 PM   #3
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Wiring Solid State Fan Controller


These are the fans I have, I purchased them from this site.

I have the 24" 1-speed (REQUIRES SPEED CONTROLLER) one.

http://www.teksupply.com/farm/suppli...62_104665.html

(this is direct link to the one I have)

Here is information PDF on these fans. I have the last one listed in the chart at the bottom of the file:

http://www.teksupply.com/wcsstore/En...2_63_64_65.pdf
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Old 07-16-2010, 03:52 PM   #4
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Wiring Solid State Fan Controller


Both motors have capacitors. If they are Permanent Split Capacitor [?] I guess they OK for this control. Try their toll-free numbers to get answers.

Last edited by Yoyizit; 07-16-2010 at 03:55 PM.
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Old 07-16-2010, 03:54 PM   #5
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Wiring Solid State Fan Controller


This is the controller they told me would work for these TWO fans together, because of the 15 AMP vs. the smaller controllers that are much lesser amerage.

So as far as wiring goes... can I just run 12/2 from the 15AMP breaker to a junction box and then split from there off to the controller and the outlet(s)?
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Old 07-16-2010, 04:07 PM   #6
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Wiring Solid State Fan Controller


Quote:
Originally Posted by mntnvew View Post
This is the controller they told me would work for these TWO fans together, because of the 15 AMP vs. the smaller controllers that are much lesser amerage.
1
So as far as wiring goes... can I just run 12/2 from the 15AMP breaker to a junction box and then split from there off to the controller and the outlet(s)?
2
1 then you're set, but at one speed control setting the airflow from each fan may not be the same.
2 I hope an electrician will chime in on this question. I'd just use an extension cord at these low currents.
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Old 07-16-2010, 04:12 PM   #7
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Wiring Solid State Fan Controller


OIC, your saying that the power coming out of the controller may not be split equally between the outlets so I should just use a single outlet and run an extension cord from that, just one that has a multiple connector end, to the fan cords.

Right?
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Old 07-16-2010, 04:31 PM   #8
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Wiring Solid State Fan Controller


Both fans will see the same RMS voltage from the chopped up sine wave you get from Triac speed controls
but since they are not identical they will probably not have the same CFM because they will have different current draws.
Even if the current draw is the same for each fan, the Fan Curve for each is probably different so again you'd get different CFM.

Before you do any permanent wiring try each fan at different speed control settings. You may want two separate speed controls.

You can also put a resistor or inductor or incand. lamp in series with the motor to slow it provided that the motor can tolerate this method, but UL and the NEC will have a conniption over this idea. You didn't hear it from me!


Last edited by Yoyizit; 07-16-2010 at 04:36 PM.
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