tag:blogger.com,1999:blog-4922503085503427986.post1901269387728406525..comments2024-03-28T15:43:04.548-07:00Comments on Desert Home: Wrapping Up The Water Heater Monitor (and control)davehttp://www.blogger.com/profile/11608589214882334649noreply@blogger.comBlogger8125tag:blogger.com,1999:blog-4922503085503427986.post-4751984383738371962018-08-08T14:06:46.491-07:002018-08-08T14:06:46.491-07:00I don't monitor mine as much, but I thought ab...I don't monitor mine as much, but I thought about it. My tank is heated to 160F most every day and the electric element is on a timer to run 1 hour a night, if needed. As it's set at 130F or so, it doesn't see much use. As for monitoring the tank temp, I have a ZWave sensor that has a DS18B20 attached to it connected to the top of the tank. I can see the tank temp top and bottom on the controller, but I track it only at the top. Mike Yeagerhttps://www.blogger.com/profile/10624780968288639678noreply@blogger.comtag:blogger.com,1999:blog-4922503085503427986.post-79476645497529754102018-06-12T08:43:32.058-07:002018-06-12T08:43:32.058-07:00For that I have a mixturer (?) (the hot water is m...For that I have a mixturer (?) (the hot water is mixed with cold water at a preset temp - 55ºC in my case)<br /><br />About Legionella in US: https://www.epa.gov/ground-water-and-drinking-water/legionella<br /><br />About Legionella in UK: about 8% of studied homes have'em - probably not enought to kill, but it's so easy to prevent...<br />https://www.sciencedirect.com/science/article/pii/S1438463916305028thkhttps://www.blogger.com/profile/07567269937478357795noreply@blogger.comtag:blogger.com,1999:blog-4922503085503427986.post-13858745461123812302018-06-12T08:33:36.955-07:002018-06-12T08:33:36.955-07:00I thought about actually using the built in sensor...I thought about actually using the built in sensors, but there's not enough current in them to supply two things, the existing differential controller and my stuff. So, to do that I'd have to take over the control of the temperature of the water heater in code. I may do that some day, but not now.<br /><br />I kinda like having the regular stuff do the work and just keep checking on it.davehttps://www.blogger.com/profile/11608589214882334649noreply@blogger.comtag:blogger.com,1999:blog-4922503085503427986.post-88225749685064468352018-06-12T07:40:25.527-07:002018-06-12T07:40:25.527-07:00Another great project and article. I've known ...Another great project and article. I've known the basics of water heaters, but now I'm going to have to look into how they sense temperature. I can understand not wanting to drill through the tank shell, but tapping into the existing sensors seems, on the surface, more satisfying. The exterior sensors will never be accurate as I'm sure their readings depend on the surrounding environment temperature and humidity. <br /><br />An alternative to using the existing (factory) sensors would to be to T-off the hot water outlet right at the water heater with 1/4 or 1/8 tubing and a solenoid to "sample" the hot water at intervals. Same for input water. Not sure how much water that would "waste" over a month or what one would do with the sampled water.<br /><br />On second thought, perhaps your method IS the best compromise.BobWhttps://www.blogger.com/profile/15802848891518070851noreply@blogger.comtag:blogger.com,1999:blog-4922503085503427986.post-31431397918079164592018-06-11T19:42:07.564-07:002018-06-11T19:42:07.564-07:00I keep it down there because of scalding. I worry ...I keep it down there because of scalding. I worry about the grandkids and outdoor showers.davehttps://www.blogger.com/profile/11608589214882334649noreply@blogger.comtag:blogger.com,1999:blog-4922503085503427986.post-46178392007167853552018-06-11T19:40:59.583-07:002018-06-11T19:40:59.583-07:00Summer here. And, yes the cold water is already wa...Summer here. And, yes the cold water is already warm when it reaches the house. That's why I'm looking at the water heater; get there before I need it badly.<br /><br />I did not know about the temp for that bacteria, but it's well water so it should be safe. Also, I don't drink it unprocessed, it goes through filters and stuff first.<br /><br />I hope I'm safe...davehttps://www.blogger.com/profile/11608589214882334649noreply@blogger.comtag:blogger.com,1999:blog-4922503085503427986.post-40770902290501554432018-06-11T14:53:01.972-07:002018-06-11T14:53:01.972-07:00All water heaters in France and uk are set to 60c....All water heaters in France and uk are set to 60c. IIRC, there has never been a single reported case of Legionella in domestic uk hot water. For the last 8 years I have kept my tank around 40c. On a good day it might hit 55 if I have a lot of surplus PV. Rain all day today, so around 38c. As mainstream european dishwashers and washing machines are all cold fill, the only thing I do with hot water is shower, and 40c is plenty.<br />Be wary of increasing your stored water above 60c as domestic appliances may not like it. Pumps in particular. <br />CJAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-4922503085503427986.post-65414153934617686162018-06-11T02:24:57.365-07:002018-06-11T02:24:57.365-07:00Nice!
32ºC cold intake is hot!! :)
Just one note,...Nice!<br />32ºC cold intake is hot!! :)<br /><br />Just one note, though: if your water temp is at 60ºC / 140ºF at the top (max), then it's not hot enough to kill the Legionella bacteria. The bacteria are dormant below 20°C and do not survive above 60°C, so going up to at leat 80ºc would be desirable.<br />What season are you at your place? spring to summer?<br />Regards!thkhttps://www.blogger.com/profile/07567269937478357795noreply@blogger.com