Digest for sci.electronics.repair@googlegroups.com - 16 updates in 4 topics

etpm@whidbey.com: Sep 30 08:48AM -0700

My brother's wife wants a small water heater under the kitchen
sink. Not an instant hot water type but one that holds a couple
gallons.
There is a receptacle under the sink but it also powers the
diswasher. I am concerned that if both the dishwasher and the water
heater are on at the same time it will pop the breaker.
I am looking for a device that will allow the water heater to be on
until the diswasher starts drawing a certain amount of current, at
which point the power to the heater would be turned off.
The power to the dishwasher needs to be on all the time, only the
heater should be switched. A switch for the water heater cannot be
added. The solution needs to be plug and play and require no input
from anyone using the diswasher.
It seems to me that something like this must be available but I
can't think of what it would be called and my brain is apparently too
fuzzy this morning to get google to come up with something for me.
I am willing to build the device myself if need be but a purchased
product would be better.
Thanks,
Eric
tabbypurr@gmail.com: Sep 30 09:00AM -0700

> product would be better.
> Thanks,
> Eric
 
A relay is all you need. Remove the coil & rewind with a small number of turns of thick wire. Now when enough current goes to the dishwasher, the water heater is turned off. I'd use 2 relays the same, one to experiment, the 2nd for the final unit.
 
 
NT
"pfjw@aol.com" <peterwieck33@gmail.com>: Sep 30 09:26AM -0700

https://www.bosch-thermotechnology.us/ocsmedia/optimized/full/o416419v272_Bosch_Indirect_Tanks_(1).pdf
 
It is called a "Point-of-Use" water heater.
 
Now, some Basic Electricity 100:
 
The POU *STORAGE* water heater draws twelve (12) amps at rated nameplate.
The typical dishwasher with an exposed internal heating element is rated at eleven (12) amps.
 
We keep a Bosch that does not have an exposed element but does have an on-board flash heater, and so also uses 12 A.
 
There are two solutions that come immediately to mind. Use a at true instant-hot for your sink water - these devices, typically, run under seven (7) amps. Then, even if you feed the dishwasher from the same line, you would be in no danger of popping a 20 A breaker - the minimum that should be in a kitchen in any case.
 
Or, run a second line directly to the dishwasher. Which is the way it should be done in any case.
 
Note that instant-hot water heaters will give you all the hand-use water you want, and nicely support a dishwasher such as it will require minimal use of its on-board heater.
 
Peter Wieck
Melrose Park, PA
Wond <lost@the.ether.net>: Sep 30 04:27PM

On Mon, 30 Sep 2019 08:48:15 -0700, etpm wrote:
 
> product would be better.
> Thanks,
> Eric
 
If you are in North America, and that is a "duplex" receptacle, its
likeley to be an "appliance" outlet, that is, each side wired to a
separate breaker. Check the labelling in the box to find out, or measure
the voltage between the two "hot" connectors. 230V means you're good to
go.
"pfjw@aol.com" <peterwieck33@gmail.com>: Sep 30 09:30AM -0700


> A relay is all you need. Remove the coil & rewind with a small number of turns of thick wire. Now when enough current goes to the dishwasher, the water heater is turned off. I'd use 2 relays the same, one to experiment, the 2nd for the final unit.
 
The good folk in Quincy, MA are recoiling in horror!
 
DO NOT EVEN CONSIDER this option, most especially if you have any other living things in your household.
 
Peter Wieck
Melrose Park, PA
tabbypurr@gmail.com: Sep 29 11:02AM -0700

On Sunday, 29 September 2019 12:19:10 UTC+1, Cursitor Doom wrote:
> > eventually became Motorola. They started making consumer radios, and
> > then invented a record player that could be installed in an automobile.
 
> By God that must have taken some doing.
 
Cars had soft suspension & poor handling in the 50s, the ideal combination. Add a high tracking force xtal pickup and it ain't that hard. But they still skipped here & there.
 
 
NT
Bo-Lennart <bo-lennart.karlsson@telia.com>: Sep 30 01:16AM -0700

Den fredag 27 september 2019 kl. 19:48:15 UTC+2 skrev Bo-Lennart:
Bo-Lennart <bo-lennart.karlsson@telia.com>: Sep 30 01:33AM -0700

Den fredag 27 september 2019 kl. 19:48:15 UTC+2 skrev Bo-Lennart:
 
> Many thanks in advance
 
> Bo-Lennart Karlsson
> Falun, SWEDEN
 
Thank You all for the reply.
I understand that there would be easier if I could present a picture of the transfprmer. I have pics, but I don't know how to present them here in this group.
I did some measuring with my L-meter, so I now know where the coils are.
I'm pretty new to this group. Please tell me if I can present a picture right here in these group. Or can I present a link to eg. One Drive or DropBox or similar....
 
Bo-Lennart Karlsson
Falun, Sweden
tabbypurr@gmail.com: Sep 30 03:19AM -0700

On Monday, 30 September 2019 09:33:35 UTC+1, Bo-Lennart wrote:
> I'm pretty new to this group. Please tell me if I can present a picture right here in these group. Or can I present a link to eg. One Drive or DropBox or similar....
 
> Bo-Lennart Karlsson
> Falun, Sweden
 
The newsgroup is text only. You can put pics in imgbb.com, flickr, any free pic hosting site.
 
 
NT
Cursitor Doom <curd@notformail.com>: Sep 30 03:50PM

On Mon, 30 Sep 2019 01:33:31 -0700, Bo-Lennart wrote:
 
> I'm pretty new to this group.
 
Welcome aboard, friend! Unfortunately we have a few nutters here but take
my advice and just ignore them. ;-)
 
 
 
 
 
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tabbypurr@gmail.com: Sep 30 09:00AM -0700

On Monday, 30 September 2019 16:51:00 UTC+1, Cursitor Doom wrote:
 
> > I'm pretty new to this group.
 
> Welcome aboard, friend! Unfortunately we have a few nutters here but take
> my advice and just ignore them. ;-)
 
Everyone needs an ignore list or killfile.
Cursitor Doom <curd@notformail.com>: Sep 29 04:43PM

On Sun, 29 Sep 2019 16:01:21 +0200, Johann Klammer wrote:
 
> supposedly also HF(acid). arirang TV has been reporting on it..
 
Vile stuff.
 
 
 
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danny burstein <dannyb@panix.com>: Sep 29 05:39PM


>On Sun, 29 Sep 2019 16:01:21 +0200, Johann Klammer wrote:
 
>> supposedly also HF(acid). arirang TV has been reporting on it..
 
>Vile stuff.
 
They should have traveled to Philly:
 
[news story]
 
Toxic chemical at PES refinery mostly cleared, aiding probe of June blaze
....
About 340,000 pounds of hydrofluoric acid (HF) stored at Philadelphia
Energy Solutions' refinery was chemically neutralized
======
https://www.reuters.com/article/us-pes-bankruptcy-chemicals-idUSKCN1VK24U
 
 
 
--
_____________________________________________________
Knowledge may be power, but communications is the key
dannyb@panix.com
[to foil spammers, my address has been double rot-13 encoded]
Cursitor Doom <curd@notformail.com>: Sep 29 07:43PM

On Sun, 29 Sep 2019 17:39:53 +0000, danny burstein wrote:
 
> Energy Solutions' refinery was chemically neutralized
> ======
> https://www.reuters.com/article/us-pes-bankruptcy-chemicals-
idUSKCN1VK24U
 
"HF can burn the skin"
 
ROTFLMFAO! :-D
 
 
 
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etpm@whidbey.com: Sep 29 03:30PM -0700

On Sun, 29 Sep 2019 19:43:26 -0000 (UTC), Cursitor Doom
>idUSKCN1VK24U
 
>"HF can burn the skin"
 
>ROTFLMFAO! :-D
Yeah, I love how some stuff is understated. Like when all those
lithium batteries in laptops were catching on fire. I read a report
where the burning batteries were described as "venting with flame".
Trevor Wilson <trevor@rageaudio.com.au>: Sep 30 06:12AM +1000

On 29/09/2019 9:15 pm, Cursitor Doom wrote:
> make up a patch lead that will enable me to probe the board under power
> out in the open where I can get at it. It's a PITA, but there's no
> alternative I can see.
 
**It's highly likely that HP made available extension adapters to suit
their test equipment back in the day. You might be able to source one.
Somewhere.
 
--
Trevor Wilson
www.rageaudio.com.au
 
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