I did a warranty replacement, and the replacement had the same problem. I'm not sure if that will prevent it from turning on, which is the goal. In 60 deg basement air, with the cold output air vented to the outside, my first month usage of just about every other day of water heating, I used 37Kwh of energy which is slightly more that one day of solar generation for a month. I implemented a schedule to heat to 140 after midnight and we've been able to coast during the day. Check with your municipality for any codes regarding the temperature setting of the water heater. Is It Possible to Translate a Microsoft Word Doc Into Another Language? I discovered bidets after traveling to Japan and Southeast Asia, and never looked back. Insert a small flat-head screwdriver into the slot on the thermostat dial. So I don't do that anymore! So if you want to only heat water at 4-5am on TH, you can do that for any temp you select. Reason for asking: I got the Ruud version, and there seems to have been a manufacturing quality issue with the 5th gen units. In the month of May for our 7KW tops solar I would earn $5 more if all usage is while producing versus no usage while producing. Just noticed the prewarm mode with my Rheem HPWH after starting from being off and drained due to plumbing work. I have an Emporia Vue 2 to monitor my household energy usage. unit set to Heat Pump Only at 110F. Or is there a way to automatically once a week or once a month to heat to 140 just to kill the bad germs? How Do You Remove or Delete Apps from a Chromebook? 9pm = 110 F This feature has been temporarily disabled during the beta site preview. I have no idea but maybe one of the experts will offer an opinion. Hi. That said, it might be interesting to try to synchronize the furnace (which is scheduled to turn on an hour before we get out of bed) with a water heater heating cycle. Also the patent makes it clear regardless of the mode selected the resistance element will come on after some unknown time period if the heat pump fails to reach the set temp before the timer runs out. Then as the water cools more in the tank the cylinder can change to the color blue or red at lowering fill levels depending on that heated water availability. Is it worth it financially, and/or environmentally (total energy use) (2 sep.?s), to bump up to 140F and have more standby losses, vs. just leaving at 120 and letting it run if it needs to (given only 40gal)? Answers to questions that I never knew I had. My plumber's distributor says I'll probably have to wait until June if I want a 2022 unit, which I do. I've done a warranty replacement twice (paid for fully by Rheem) and both replacement units had the same problem. You'd think Big Box Store would have both available (though ordinarily I wouldn't go through them for install), but they just said they didn't do installs on hybrids at all. Thanks for all your replies. Yes, thank you. Then download and set up the Rheem app, entering both values when prompted, and you should be good to go, with your water heater showing up in the app itself.if(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[580,400],'askdavetaylor_com-medrectangle-3','ezslot_1',107,'0','0'])};if(typeof __ez_fad_position != 'undefined'){__ez_fad_position('div-gpt-ad-askdavetaylor_com-medrectangle-3-0')}; If thats all good, then launching the app should show you something like this: If you arent seeing your device, go through the setup steps again until you do see it show up (notice mines Gas Water Heater in Basement on the lower left). Your email address will not be published. I recall the Sandens recommend 80gal if used for hydronic heat to maintain stratification, I believe for efficiency reasons There are many harmful bacteria that can survive and multiply at 110 F. As in not regulating the temp at all? Fan is very low noise, and while I can hear the compressor, I wouldn't consider it bothersome. All good. - damping in wall (be careful about how dense/contact w/both sides), The noise is across a range of frequencies so may need a range of solutionsboth light and heavy materials, Final tip: I have mine set to run up to 140degF by 3pm when I (in normal times) am not home, then coast until the next day (mix down to 120 w/valve). But I am hoping that it will not be needed, since the intake utility room has an effective cubic footage of "the whole house" blowing air into the 1125 cubic foot garage. Of course the price is a slightly longer time before hot water reaches the faucet. Yes, the app is underwhelming. OSHA says 140 degree water kills legionella after 32 minutes. The fact that you are getting a pre warm message means your tank has cooled below the unknown pre warm temp. Follow me on LinkedIn I have the XE80T10HS45U0 purchased online from the 'Orange' big box store on 3/28/2022 and received a unit with a production date of "08MAR2022". The bottom line is I am happy with my heat pump water heater and can validate that it saves me significant money compared to natural gas. I randomly stumbled back on this question from 2019. On the other hand, we would then save the base charge on gas, which is around $140 a year, so that would make the increase in electricity usage more palatable. A Rheem water heater leaves the factory with the temperature preset at 120 degrees Fahrenheit, but you can adjust the temperature on the thermostat anywhere from 90 degrees Fahrenheit up to 150 degrees Fahrenheit. Thus, I would lean toward this Rheem unit, but I want to be sure that I would be able to run entirely with the heat pump and I could figure out a way for the "pre-warm" resistive heat elements to never kick in other than for rare maintenance cycles. Thanks. You need a big enough space and may or may not want to include inlet and outlet ducts. Could @S_K or someone maybe try out my idea of how to trick the system to never enter pre-warm with a simple stair step scheduling approach? 3 Electric Only this turns off the heat pump. I am actually surprised that you obtained as much info as you did from the Rheem techs. I have no idea what the unit does. Is there a date code or other indication to know which ones to avoid? What climate zone on you in? Neither situation being practical/realistic, but I can still nudge usage towards production ours with pool pump timers and the Hot Water heater], "however it looks to be $2K more expensive " - strap to walls with BR isolators (or dep. If the HPWH is in heat pump mode, the electric resistance element should be off. The utility room is 840 cubic feet (just measured). Energy Save mode, what criteria push it into electric element mode instead of heat pump? Maybe you could find another way to pre-warm water before it gets to the HPWH (like a passive buffer tank or drain water heat recovery). Is a 2022 unit with a noise fix? So this is how my installer purchased my unit. I think a significant section of the USA population, even on this website (which I thought meant people would approach issues with a broader understanding of the nuances involved in the regional green building) often forgets how much regional electricity prices vary they sometimes think their "9c/kWh" electricty prices are country wide. Vacation period is setup, but what happens? Small, point-of-use Rheem water heaters have one access cover, but larger whole home water heaters have two access covers. How'd it work out? Thank you very much. Please read on! 2. A question: did you get your Performance Platinum? I don't believe I have the 'noise problem'. At 240V, that's about 1.5A. The spec sheet gives max amps, but I assume that is for when the coils are running at max. When you're paying up to, virtually 50c/kWh, it's amazing how much you can save with off-peak usages and heat-pump only modes. Side goal would be even more relative capacity. 8am = 135 F Another idea I'm trying: heat to 135 in the early morning before we wake up, and then drop the temperature to 120 all day. I look at consumption chart in the app and did not notice any outliners when using Energy Saver mode with recirculatory pump though. Planning to buy a 50 gal one soon. I am NOT happy with the Econet application for its lack of displaying the live temperature sensor data and it's lack of browser support - why the heck does everything need to be an app?! then why show a '0' data point?!? Rheem phone support told me they are not Rheem employees and are a contracted out phone support center business. Replace the Rheem water heater access covers and secure the covers with the screws you previously removed. We've had a cheap Luxe one for two years (https://www.amazon.com/gp/product/B00A0RHSJO), and about a year ago upgraded to a fancier model (https://www.amazon.com/gp/product/B07JHKZ3L4). note: During the summer I disconnect one of the hvac air outlets in the top the picture and hooked it up to the cold air outlet on the heater. It stinks that the current water temp, the most obvious metric to provide, is not given. Thus, it seems like the best way to schedule it is to push the buttons on the unit's touchpad and I'd rather be pushing buttons for two schedule set points as William describes. I stop using the scheduling app after the second time this happened, and just leave it at set temp with heat pump only. Does it mean OFF? You might find reading the whole 77 pages as tedious as I did, but ultimately there are explanations for basic energy management approaches used by various manufacturers. So those storing energy at higher temps are probably loosing efficiency and not gaining as much as they are think doing that. Follow me on Twitter This web site is for the purpose of disseminating information for educational purposes, free of charge, for the benefit of all visitors. For example, if you tell to heat water from 4-7am, you see the daily energy usage graph shoot up at 5am, then show no energy used at 6am, then at 7am again the graph shoots up again. Are Expensive Building Components Necessary? Has anyone in the SF Bay Area or a similar climate zone been able to achieve 145 F with the Rheem in heat pump only mode? I believe the heat pump uses 360 watts at steady state, though typically startup has a higher load. Just got a Rheem water heater installed and added the EcoNet wi-fi home module. Also, it is a 1924 vintage house with single pane windows, and a fair amount of opportunities for drafts it is *not* a modern airtight living space. This was installed last year during construction of a new house where, unfortunately, it was installed against an interior wall. Remove the two screws holding the access cover to the side of your Rheem water heater. We have an 80 gal. I am also in Seattle, and when I was looking into getting a hybrid a few years ago, plumbers wouldn't handle replacing a gas water heater with an electric one because it involved electrical work, and electricians wouldn't take out a gas heater, and I couldn't find a place with both on staff who could give me a quote for the whole job. You can see that I have no vacations set up. From the Rheem site: Vacation Mode lowers the set temperature to conserve water and energy while youre away on vacation. . At the same time, every 6 hrs, the info shows I burn 140wh of energy and this includes days where the Rheem is OFF for days on end. I think you are over-thinking this. I spoke to one installer and was told the supply houses receive batches of HW heaters all having the same manufacturer date. This jumps frightingly when the Element come on. Thanks for the pointers. I have this same question. If anyone has had luck, and the 5th Gen Rheem/Ruud is performing according to the noise spec of 49 dB, I'd love to hear about it. Note that my Rheem (Ruud) is actually a heat-pump hybrid. My home is fairly new, so adding the subpanel and circuit was a fairly simple process. Anyone doing upstream preheat, from a geothermal desuperheater as an example? Yes I am sure the lower temp does save some energy but it is not enough to risk peoples lives for. Located in Seattle, WA. If your unit has a fault the app maybe trying to get you to enable the element to hide the fault until the warranty expires. Is there some advantage to using Vacation Mode, as opposed to turning off the water supply and cutting the power at the breaker? Is High Demand mode = all electric element use, no heat pump? Hein, thanks for your detailed system description. To be clear, it does this only sporadically, not in any obvious pattern. Every other time slot is always empty. The charts seems to have same pattern as Heat Pump mode and my setting is 135-138F usually because it is a vacation rental on weekends. Ductless exhaust of cold air to the garage where my beer fridge lives. So now I have no hot water expense now and no gasoline expense as drive an EV for transportation. You will have two 30-amp double-pole breakers inside your panel if you have an electric dryer. Id like to understand what is going on and to not have it do this, as I am OK with longer recovery times in order to save energy. There are several aspects to this. 2 Normal is the same as energy saver but gives the heat pumps less time to its job. Make sure to adjust both thermostats if your Rheem water heater has two access covers. Even if the furnace has its own air source, I'd be concerned that cloths dryer will cause the HPWH intake filter (which is pretty basic) to clog more quickly or even allow fine particles to build up on the heat pump. @ C Z - by 'status screen' do you mean the screen on the water heater itself? The biggest annoyance is that the energy used bar chart graphic that shows one bar for every 1 hour timeslot is in disarray. Away mode is good and fine, but tells me nothing about what away mode does. I am getting the 80 gallon "Performance Platinum Rheem" within the next month or two from the Orange Big Box here in Seattle. If the water temperature drops below a certain temperature, the elements will turn on in any mode to attempt to help the heat pump recover. It dips as low as 275W and peaks about 403W. Thoughts on +/- of stratification vs. mixing (transfer efficiency from HP coil w/larger deltaT, but more cycling? I ask because it could be that you incoming water is cold enough to trigger an "add-heat function" in the HPWH programming. Just write down your water heaters serial number (its on the sticker) and your home modules MAC address (again, on a sticker thats on the back of the home module itself). The space is fine -- we have a good-sized unfinished basement. My Econet app is constanly urging me to swithc to Energy Saving mode. But no more than 6-12" long, through a single layer piece of sheet-rock. If this bacteria is a concern in your area, you can mitigate your risk by maintaining the tank at that temperature. (see the charts on pg 51 and pg 56). My guess is in the mode you have selected should the tank temp fall to far below the set point the heating element will be energized. Wow. 9am = 140 F Being able to scavage heat from the dryer might work out, but both appliances have to be running at the same time. I can confirm there's a quality issue with the 5th Gen hybrid water heaters. But this time, when came back home I cannot turn off the vacation mode, the controller appears to be frozen as it does nothing when pressing any of the buttons. I was only overthinking it because of SK's original post for this thread that the resistive rods kick on unexpectedly and the diagnosis was due to low temperature. That's what I would buy if I had to do it over. I was afraid it might still be the case that it took multiple different folks. This patent application may explain what's going on (https://patents.google.com/patent/US8385729B2/en). I have the Rheem 80-gallen hybrid heat pump water heater. At least that is how I understand the "modes." Still unsure whether Hight Demand is auto-all-electric or heat pump might kicks in though? The cloths dryer's hot-moist output is to the outside. We are just 2, but frequently get 3 daughters and husbands visiting and showering at which point we need the 80 gallons. The Stiebel Eltron (unit D) behaved more like what you are desiring with very little (if any) resistive operation, which helps system efficiency in certain contexts. Installing Rigid Foam Above Roof Sheathing, Climate Activists React to Dont Look Up. Might be that concealing it possibly shields Rheem/Rudd from issues reported by the consumer. 49 cents vs. 17 cents. The closest they come is a tiny icon of a cylinder that is colored green when there is water available at the temp you set it to heat to. If you really want to operate off the HP 100% of the time, you may have to lower the temperature setting or change user behavior. cold ambients reduce heat pump capacity and COP) and also the current temperature of the water in the tank. Due to distribution cost going both ways - is it better to use when producing with solar but it is minimal. Then you need to make sure everythings talking and that youve got your Rheem water heater set up on the EcoNet network too. The turnover at that store is higher than the supply houses and the manu date can be validated before purchase. In general I am very happy with the low energy. with a mixing valve perhaps installed right at the tank set to 110-120? Done by NREL - Laboratory Performance Evaluation of Integrated Residential Heat Pump Water Heaters (another poster provided a link I have lost) This will give me a bigger, better, buffer. You dont want air exchange between the garage and the living space. How many users in your household, and do they tend to all put demand on the HPWH at the same time? Do we not care about the 30 feet of hot water pipe to the shower head? Main goal would be to l allow the heater temperature to drop a long way say down to 125 and kick in the compressor already before the drop it becomes noticeable at the shower. Anyone have a clue as to the difference between "heat pump only" mode and "energy saving" mode? - ducting wish there was user-accessible data on top-middle-bottom tank temps!). Now, of course, putting in an electric water heater would mean decommissioning the gas line as well, as that's our last gas appliance. Rheem phone support has no answers. Solar is good and my system will be paid for completely in 2 more years. Can you double-check your settings? On the Status screen, it says pre-warm status. 140?) Replace the insulation inside the cavities. But I want to schedule vacation mode and cant figure out how to do so.if(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[468,60],'askdavetaylor_com-box-3','ezslot_7',125,'0','0'])};if(typeof __ez_fad_position != 'undefined'){__ez_fad_position('div-gpt-ad-askdavetaylor_com-box-3-0')}; The first and most important step is to make sure you have everything set up, including the Rheem app on your smartphone. Are you on municipal or well water? I recently had a 50-gal Rheem Hybrid water heater installed. tank. Also going to add some dampening material to the wall. 9:10pm = 115 F I also have a PV system with an eGauge, so I can see real time energy use. Hope thats at least a little usefulgood luck and let us know how it turns out! We're looking at how to tie it down without strapping it to the wall (Calif) since that really increases the sound levels in the house. Rheem (unit C) chose to ensure hot water delivery over ultimate efficiency. Therefor I like to heat from 10am onwards admittedly only saving pennies, but it feels right. ph_aficionado I just want to make sure you understand the risk you are taking with such a low temperature setting on a water heater. It generates a pretty loud tone that you can easily hear in the house. It may be that the two lock out modes are designed to safeguard the heat pump. Does it keep the water at 55 degrees? My use case is 4 adults full time (3 shower heads) with an occasional extra 2 adults. (Note that some sources say the tank should be at 140 degrees to avoid Legionnaire's, but then you have to worry about scald risk.) When I replaced my gas water heater with a HPWH, it was a three-step process. If the heat pump cannot raise the temperature to the preset temperature within either of the lockout periods, the controller turns on the heater element. Preheated incoming water may be confusing the sensors and algorithms. In the 2019 model that I installed in my guest house, even in Heat Pump mode it would use the heating element if needed. Also, I read something about a hydrogen build-up (??). Tap on the start or end time to change it:if(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[250,250],'askdavetaylor_com-medrectangle-4','ezslot_8',108,'0','0'])};if(typeof __ez_fad_position != 'undefined'){__ez_fad_position('div-gpt-ad-askdavetaylor_com-medrectangle-4-0')}; Got it all just so, with your exact start and end times ready? I run the water heater in heat pump mode for maximum efficiency. Knowing what I know now (nobody told me!) Any idea whether Rheem auto-push firmware updates into the heater? Theres a bunch of information online about how to do that, but from my own experience, its pretty straightforward. NO major noise issues. I was somewhat flabbergasted the person told me this. It's important to determine whether or not your electrical service can support the HPWH.