Ebmpapst fan, model W3G250-HK19-11


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Old 06-18-20, 09:25 PM
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Ebmpapst fan, model W3G250-HK19-11

I've purchased an ebmpapst fan, model W3G250-HK19-11, (click here for data sheet).

The problem: it will not turn on when I wire it up and give it power. An acquaintance of mine, also a retired electrician of 30+ years, came over and is also stumped. He suggested I post here in case we're missing something.

To test the fan, we've used 12 gauge wire, connected directly to 8 gauge wire (black/white/grd) coming from the panel, based on the diagram in the spec sheet. It should be turning on, but we're getting nothing.

I tested another smaller 240v fan in the same manner, and that one works fine...... thus I'm worried this fan is simply broken. Normally that wouldn't be a big deal, but I purchased it a long time ago and is no longer under warranty.

Are we missing something?

<img src="https://cimg9.ibsrv.net/gimg/www.doityourselft.com-vbulletin/2000x1504/20200618_190252_2e0478cd83994691371e7dd8a69308a1fbc05543.jpg" width="2000" height="1500"/>
<img src="https://cimg3.ibsrv.net/gimg/www.doityourselft.com-vbulletin/2000x1504/20200618_190219_e534806759f9d43a3efddec3ff3a837153072bdd.jpg" width="2000" height="1500"/>
12 gauge wire on the left, connected to the fan terminals
 
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Old 06-18-20, 11:33 PM
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Welcome to the forums.

To test the fan, we've used 12 gauge wire, connected directly to 8 gauge wire (black/white/grd) coming from the panel
Not quite sure what kind of setup this is but make sure that fan is on a circuit protected by a 20A breaker or less.

That is an electronically controlled fan. It can be controlled with just a control pot or any type of 0-10vdc variable source. In your case..... if you just want the fan to run at max speed.... connect a jumper from yellow to red.

If you want the fan speed to be variable..... you'd need to purchase a 1/2w 10Kohm linear potentiometer.

10k ohm pot
 
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Old 06-19-20, 12:33 PM
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Pjmax, thank you so much for your reply. Jumping the yellow/red connections works. Not sure why my electrician wasn't able to figure that out..... but he didn't charge me so I guess it worked out. Thank you so very much.

In case you were wondering, the application is for an air cooler for my air compressor, using an oil cooler and this fan butted up right against it.
 
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Old 06-19-20, 12:36 PM
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You're welcome. I'm guessing in that application the fan will be best running at full speed.

That's a Papst motor from Germany. They are known for their quality motors. I've seen many in electronic devices like reel to reel tape recorders.
 
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Old 06-19-20, 12:47 PM
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Yes that was my intention. I purposely paid up for the 1120cfm fan for that reason. Not being an electrician, that diagram was pretty tough to read, even after multiple attempts at self-teaching myself how to read electrical diagrams online (and obviously not very successfully). Thank you so much again for your help.

I suppose a follow-up question(s), if I may....:
I'm guessing a fuse is a good idea...... placed before the fan but after the connection? Label on fan says 1.1A.... so should I simply get an in-line 3a fuse? Or 5a?

I intend to wire the fan directly to the motor on the compressor, so it runs/stops when the compressor is running/stopped. Are there any other sort of "protection" devices you'd recommend?

Pic of motor label for reference.
<img src="https://cimg2.ibsrv.net/gimg/www.doityourselft.com-vbulletin/2000x1504/15925959176381669084584679951274_31b8716c2aa1fa6d9da358548ba891e1c62d7850.jpg" width="2000" height="1500"/>
 
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Old 06-19-20, 12:49 PM
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Good idea. You can use a three or five amp fuse.
 
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Old 06-19-20, 06:26 PM
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Ok great, thank you again.
 
 

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