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Adding LEDs to my Isomac - Electrical help?
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dana_leighton
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dana_leighton
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Posted Sat Sep 5, 2009, 10:30pm
Subject: Re: Adding LEDs to my Isomac - Electrical help?
 

One minor glitch - the screw I used to mount the transformer sits at the level of the top cover for the enclosure, so the cover does not seat exactly how it should. It still screws down, and does not affect the cup warming tray that sits atop that cover. If I were to do it again, I might not use that screw, but mount the transformer with some self-adhesive foam or velcro. Of course, on a machine other than the Relax, there will likely be other mounting issues... :)

 
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SwingT
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Posted Sun Sep 6, 2009, 8:41am
Subject: Re: Adding LEDs to my Isomac - Electrical help?
 

Looks like a great install to me. Hard to see how you would have any issues. They may crop up, but I think you've covered the big ones.


dana_leighton Said:

If I were to do it again, I might not use that screw, but mount the transformer with some self-adhesive foam or velcro.

Posted September 5, 2009 link

Or maybe use a tie wrap? or the screw in a different spot?

Could be a problem there from the heat in terms of adhesives.  I've done several things with adhesive back velcro - where they have less heat than would likely be in your machine - the adhesive stays too liquid and doesn't hold. Might hold with something else, though.

Thanks a bunch for posting this thread - I'm already planning how to do the deed on my Vivaldi II.
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CoffeeRon
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Posted Sun Sep 6, 2009, 12:05pm
Subject: Re: Adding LEDs to my Isomac - Electrical help?
 

Looks good Dana. I'm thinking my Lyra would look good with some LEDs now. I'm investigating a grouphead thermometer so maybe when I pull her apart I'll do it all at once.
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SwingT
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Posted Sun Sep 6, 2009, 3:19pm
Subject: Re: Adding LEDs to my Isomac - Electrical help?
 

I looked around on the net some last nite.

Came up with this site.

http://www.superbrightleds.com/light_bars-rigid.html

These look pretty good on the specs -

http://www.superbrightleds.com/specs/LBM-x3SMD.htm

I like the size, thickness, angle, etc. - beam angle of 140 degrees

1.378 inch square unit - .1378 thick

I'm not sure of the actual specs of the IKEA, but I'm thinking I can use 6 of the above, particularly if they are thin enough to use on the inside = it'll be close, but I think doable

This transformer -

http://www.superbrightleds.com/specs/wps.htm

Note: using these units will involve some soldering and heat shrink tape, but I have that on hand. They don't specify the size wire that they are using but I'm thinking I can use some CAT5e strands for hookup.

ETA - this transformer will likely need to be installed outside the machine due to temperature service rating - same with Cat5 strands - the insulation is PVC that is not certified above 60C
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davethebrewguy
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Posted Mon Sep 7, 2009, 8:08pm
Subject: Re: Adding LEDs to my Isomac - Electrical help?
 

Please keep in mind that the insulation on wiring in and out of the transformer, and possibly the transformer itself, is rated for only 60C (about 140F). My first instinct upon reading this thread is that worries about moisture are probably overly cautious, but the possibility of the insulation melting and having bare wire touch the chassis could be a concern.
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dana_leighton
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dana_leighton
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Posted Mon Sep 7, 2009, 8:19pm
Subject: Re: Adding LEDs to my Isomac - Electrical help?
 

davethebrewguy Said:

Please keep in mind that the insulation on wiring in and out of the transformer, and possibly the transformer itself, is rated for only 60C (about 140F). My first instinct upon reading this thread is that worries about moisture are probably overly cautious, but the possibility of the insulation melting and having bare wire touch the chassis could be a concern.

Posted September 7, 2009 link

Good point, Dave. The air temperature measured with a probe at the top of the cabinet where the transformer is mounted is 152F. I'll have to reconsider the fiberglass sheath. I'll disconnect the power until then.

PS: How did you know about the temperature rating of the wires? Is it a standardized rating?

OK thanks for the heads up.

Dana.

 
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davethebrewguy
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davethebrewguy
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Posted Mon Sep 7, 2009, 8:47pm
Subject: Re: Adding LEDs to my Isomac - Electrical help?
 

ex-electrician
See if you can read any markings on the cable, 60C is pretty standard but there are cables with higher ratings, I would expect that this lighting system was designed for use in a "room temperature" environment and it is unlikely that the manufacturer would spend anything extra for high-temp wire, OTOH I've been wrong before so see if you can find the rating.
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dana_leighton
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dana_leighton
Joined: 11 Jan 2002
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Posted Mon Sep 7, 2009, 8:54pm
Subject: Re: Adding LEDs to my Isomac - Electrical help?
 

davethebrewguy Said:

See if you can read any markings on the cable, 60C is pretty standard but there are cables with higher ratings

Posted September 7, 2009 link

OK Thanks Dave. Here's what the wire says for the Ikea unit:

(UL) SPT-2 105C 300V VW-1 E235205 18AWG X 2C ZHEN HUA

I am guessing it's rated for 105C (221F) then?

 
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SwingT
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Posted Tue Sep 8, 2009, 4:23am
Subject: Re: Adding LEDs to my Isomac - Electrical help?
 

what about the transformer? I wonder what it will hold up to?
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davethebrewguy
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davethebrewguy
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Posted Tue Sep 8, 2009, 7:11pm
Subject: Re: Adding LEDs to my Isomac - Electrical help?
 

dana_leighton Said:

OK Thanks Dave. Here's what the wire says for the Ikea unit:

(UL) SPT-2 105C 300V VW-1 E235205 18AWG X 2C ZHEN HUA

I am guessing it's rated for 105C (221F) then?

Posted September 7, 2009 link

Correct, apparently Ikea went for the good stuff. That 105C wire shouldn't cause you any trouble.
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