I just ordered a Delta Elentronics fan EFB 1548VHG

http://www.delta.com.tw/product/cp/dcfans/download/pdf/EFB/EFB172x150x50mm.pdf


It has 4 wires on it.

I know what the red+ and black- are....

What are the yellow and blue for....?

its a 300 cfm fan
I ordered from Supplycenter's website..

 

What did you intend to use it for? You probably don't need the other connections, they will be for speed control via sensors.

 

Well i put it on a 110v to 24v transformer .40amps
but its not turning on fan when i connect the +/-

I noticed the fan uses 24-60v
and has a .48amps rating. But I figured that was using its max volts of say 60.

Hmmm

I was thinking it might be some speed control also....
but what with a rheostat?

 

What did you intend to use it for?

Solar furnace. Blow hot air from it into garage.

 

Well i put it on a 110v to 24v transformer .40amps
but its not turning on fan when i connect the +/-

Is that a 24V AC or DC output transformer? The fan runs off DC.

 

Well i put it on a 110v to 24v transformer .40amps
but its not turning on fan when i connect the +/-

Doesn't your fan spec sheet say DC?

 

Hello,

Did you have a look at the general info pages?
http://www.delta.com.tw/product/cp/dcfans/download/pdf/general_info.pdf

The last few pages mention the options for the extra wires.

Greetings,
Bertus

 

Yes AC to DC

I don't understand why its not turning on.

I connected the +/- to the transformer and even touched the blue and yellow to one another ( if it is a sort of switch it should have worked).

 

The input power = 23.52 W @ 48 V (the rated input).

By P = V.I, I = P/V = 23.52/48 = 0.49 A

However, at 24 V, I = 23.52/24 = 0.9 A

And at 60 V, I = 23.52/60 = 0.39 A

The quoted values are at rated input voltage, as is quoted on the fourth note right on the bottom of the page.

 

Joulian,

As others have mentioned, I believe you have a 48V fan. I think you will need to apply 48 volts to get the fan operating. Once it is operating, I think you will find that the yellow and blue wires are the collector and the emitter of a sensor transistor. This transistor is there to permit the monitoring of the motor's speed.

hgmjr

 

Ahhhh man, I was afraid this was going to be the reason. I asked the guy at the store if it would work. He said yes, i bought it from surpluscenter.com.

Ok I just looked for a 48v transformer on that site above.
Any suggestions? on what to do. I am going over my budget on this entire project.

 

Would this one work?
https://www.surpluscenter.com/item.asp?UID=2009121815370158&item=16-1256&catname=electric

 

Would this one work?
https://www.surpluscenter.com/item.asp?UID=2009121815370158&item=16-1256&catname=electric

This fan should work for you. Are you going to need to control the speed?

hgmjr

 

hgmjr, the fan that you have suggested requires 1.1 A @ 24 V dc; some 0.6 A over joulian's power supply.

 

Eng1ne,

Good point. It seems that in order to use the 24 volt fan mentioned in the earlier post, a transformer with a higher power rating will need to be acquired.

hgmjr

 

hmmmm man.
Any site suggestions like the one i used that would have a good deal on one?