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Discussions > Espresso > Machines > Hot pipes versus...  
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AaronHolmes
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Joined: 3 May 2013
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Location: Seattle, WA
Expertise: I love coffee

Espresso: ECM Sorrento; Vibiemme...
Posted Thu Dec 5, 2013, 8:52am
Subject: Hot pipes versus wire insulation
 

Howdy.

I've been fiddling with my Vibiemme Domobar Double for a week now and have had several occasions to open the machine and fiddle.  One thing that I'll admit to not being impressed with is the wiring in this machine:  Some wires are in contact with hot pipes, and others have nothing to stop them from eventually coming into contact with hot things.  This doesn't bode well for the longevity of the wiring.  I see short circuits and other badness in my future.

Has anybody confronted this issue (with this machine or others)?  In some cases, a simple zip tie will do the trick -- securing loose wires to other wires or nearby non-hot objects.  In other cases, however, the wires are very short and seem to have no alternative but to rub against extremely hot metal.  Does anybody have a recommendation for a readily available pipe insulating solution?  Something I could wrap around the pipes in the immediate vicinity of the wiring in order to make contact between the two a non-issue?

Thanks for any advice!
Aaron
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calblacksmith
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calblacksmith
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Posted Thu Dec 5, 2013, 10:07am
Subject: Re: Hot pipes versus wire insulation
 

HI,
A lot of machines use high temp silicone insulation on the wires so contact with hot things is not an issue. I can not say what you have, I have not been inside that machine. If you are worried, as you said a simple fix is to just make everything nice and neat with zip ties. YMMV!

 
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frcn
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frcn
Joined: 23 Dec 2001
Posts: 3,284
Location: Northern California
Expertise: Professional

Espresso: Vibiemme Domobar Double
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Vac Pot: Hario, 2 Cory pots, 1 Cory...
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Posted Thu Dec 5, 2013, 11:27am
Subject: Re: Hot pipes versus wire insulation
 

I had been thinking about doing an inspection in my DD for a while and your post inspired me- that and the 27 degree temperature and 25 MPH winds outside this AM. My machine is from 7/2011 (about 2 years of use). None of the wires show any heat damage including a couple which were against some hot water pipes.

The only problem worth noting at this time was that some of the aluminum tape holding the white wool (fiberglass-ish) insulation on the steam boiler has lost its adhesion to the boiler. The insulation is still in place but I would like to replace it with the newer silicone(?) orange padding (which I believe you have in your machine).

I have been using the CC softener system and this is what the water level probe looked like when I removed it this morning after that long of use (and I have never descaled in that amount of time).  I used a little Bar Keeper's Friend to remove the thin scale on it and it shined like new.

frcn: sensor_scale.jpg
(Click for larger image)

 
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AaronHolmes
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Joined: 3 May 2013
Posts: 6
Location: Seattle, WA
Expertise: I love coffee

Espresso: ECM Sorrento; Vibiemme...
Posted Thu Dec 5, 2013, 2:47pm
Subject: Re: Hot pipes versus wire insulation
 

calblacksmith Said:

HI,
A lot of machines use high temp silicone insulation on the wires so contact with hot things is not an issue. I can not say what you have, I have not been inside that machine. If you are worried, as you said a simple fix is to just make everything nice and neat with zip ties. YMMV!

Posted December 5, 2013 link

Yep, I'll do my best.  Not all of them can be easily zip-tied, unfortunately.

frcn Said:

I had been thinking about doing an inspection in my DD for a while and your post inspired me- that and the 27 degree temperature and 25 MPH winds outside this AM. My machine is from 7/2011 (about 2 years of use). None of the wires show any heat damage including a couple which were against some hot water pipes.

Posted December 5, 2013 link

Well, that's reassuring.  Maybe I'm worrying about nothing.  Still, I'll zip-tie what I can and check a few months from now to see if any of my fears had merit.

frcn Said:

The only problem worth noting at this time was that some of the aluminum tape holding the white wool (fiberglass-ish) insulation on the steam boiler has lost its adhesion to the boiler. The insulation is still in place but I would like to replace it with the newer silicone(?) orange padding (which I believe you have in your machine).

Posted December 5, 2013 link

My machine has gray foam insulation with a woven black plastic fabric over it that's held in place with Velcro straps, as picture on 1st-Line's site.
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frcn
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frcn
Joined: 23 Dec 2001
Posts: 3,284
Location: Northern California
Expertise: Professional

Espresso: Vibiemme Domobar Double
Grinder: Mazzer Kony, Baratza...
Vac Pot: Hario, 2 Cory pots, 1 Cory...
Drip: Behmor Brazen, Bunn A10 mod...
Roaster: computer controlled Hottop,...
Posted Thu Dec 5, 2013, 4:05pm
Subject: Re: Hot pipes versus wire insulation
 

AaronHolmes Said:

My machine has gray foam insulation with a woven black plastic fabric over it that's held in place with Velcro straps...

Posted December 5, 2013 link

Appears that they changed it once again since the last picture I saw. That's OK, though, as that looks fine to me. I just updated my review of the DD and thee is a photo showing eh old style insulation. Just about anything is an improvement over that stuff. It does work, but great care must be taken when working inside the case. My XL hands don't make that job any easier.

 
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jonr
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Joined: 25 Jun 2013
Posts: 254
Location: Americas
Expertise: I like coffee
Posted Thu Dec 5, 2013, 5:01pm
Subject: Re: Hot pipes versus wire insulation
 

There are quite a few wire insulations that are rated for temps  higher than you are going to see.   I would think that your machine uses one of them.
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