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Power control box ?
Posted: Wed Feb 26, 2014 1:15 pm
by Bill-a-newbie
Should the power control box have holes drilled in it for ventilation? I am putting a new one together with a heat sink on the controller, inside the box. Not sure how much heat will be generated, but its a 220V 40 amp controller with 4500 watt element. It I need to give it ventilation I would rather do it before its all together!
TIA,
Bill
Re: Power control box ?
Posted: Wed Feb 26, 2014 1:26 pm
by aaa186
Do it.................................
Re: Power control box ?
Posted: Wed Feb 26, 2014 1:48 pm
by bearriver
Vent holes and a old computer fan is a common solution. Remember to pull, not push the air.
Re: Power control box ?
Posted: Wed Feb 26, 2014 1:57 pm
by Bill-a-newbie
How would you power a computer fan?
Re: Power control box ?
Posted: Wed Feb 26, 2014 2:36 pm
by jholmz
vent holes are enough for mine i just went around 3 sides with a 1/2" drillbit spaced 2" apart havnt had any problems with it running my 15.5 gal keg boiler on 220v 5500w element
Re: Power control box ?
Posted: Wed Feb 26, 2014 3:07 pm
by Bob Loblaw
Bill-a-newbie wrote:How would you power a computer fan?
With a Wall wart, or get a 220v fan off of eBay
Re: Power control box ?
Posted: Wed Feb 26, 2014 3:10 pm
by goinbroke2
You must have an old cell charger etc laying around? Use 110v off the 220v and power it with that. Most are 12v output.
Re: Power control box ?
Posted: Wed Feb 26, 2014 3:14 pm
by The KYChemist
Plenty of videos and instructables online...
Re: Power control box ?
Posted: Wed Feb 26, 2014 4:12 pm
by OBX Phantom
I agree with jholmes... Just some vent holes are enough. I have 4, 1' holes in the bottom directly under my heat sink, then several 1' holes spaced around the sides, and I have no problems with over heating. I think the computer fan is overkill. Only creates more heat to get rid of and also uses more electricity.... just my .02 cent worth!!!
Re: Power control box ?
Posted: Wed Feb 26, 2014 4:24 pm
by Bill-a-newbie
I guess I will start with some holes, Give it a try and see how warm it gets! What is an acceptable temp. for the controller?
Re: Power control box ?
Posted: Wed Feb 26, 2014 4:55 pm
by rager
bearriver wrote:Vent holes and a old computer fan is a common solution. Remember to pull, not push the air.
so aim the fan to pull air into the box?
Re: Power control box ?
Posted: Wed Feb 26, 2014 5:28 pm
by Expat
Use a flatsided heatsink and mount your SSR (use thermal paste) to it; cut a hole in the side of your box. Mount the heatsink/SSR module through the box from the outside such that the heatsink is on the outside. Reduces the need for fans and drilling lots of holes in your project box.