Your email address will not be published. Another note on the Energy Saver Mode from Rheem: Energy saver mode is not recommended for water systems utilizing recirculating.. To accomplish that handy trick, go back to Settings: Tap on Works with Nest, and, well, sign in to your Nest account: Went out on vacation for the holidays, before leaving I set the heater on vacation mode as I always do. You might also want to add a mixing valve set to 120 so nobody gets scalded. Further, please note that by submitting a question or comment you're agreeing to our terms of service, which are: you relinquish any subsequent rights of ownership to your material by submitting it on this site. They are way louder than spec. It stinks that the current water temp, the most obvious metric to provide, is not given. Hein, thanks for your detailed system description. Also, the incoming water temperature plays a big part in determining if the elements have to come on to assist the heat pump with heating the water.". They greatly reduce the need for frequent showering (not to mention reducing toilet paper use to a minimum). Note that my Rheem (Ruud) is actually a heat-pump hybrid. I only run in heat pump mode. This feature has been temporarily disabled during the beta site preview. 
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. The architect, builder and I didn't have experience with them so we didn't catch it before construction.
I stop using the scheduling app after the second time this happened, and just leave it at set temp with heat pump only. Happy to see all the additional information posted. This is not documented anywhere and phone support is there but they dont know either. I should have installed a temperature controlled mixing valve, and I may still retrofit that. I look at consumption chart in the app and did not notice any outliners when using Energy Saver mode with recirculatory pump though. Is High Demand mode = all electric element use, no heat pump? Water heater installed in garage. 10am = 145 F (or max) (I may have mangled the details, but it was something like that.) Become a GBA Prime member and get full access to GBA articles, enyclopedia, videos, CAD library, and more. I may try putting insulated flex duct on the exhaust and intake and see if that reduces the noise. Has anyone figured out exactly what conditions trigger this pre-warm mode? That may be what the tech was suggesting. I've not done anything about my loud unit, the local expert came out to install the new "sound reduction kit" Ruud sent us but he said it wouldn't make any difference so we passed (a ball bearing fan and a cheesy piece of foam). When not in use for hours the rest of the piping stays nicely cool, not losing heat. How Do You Remove or Delete Apps from a Chromebook?
I usually have 10-16 guests on weekends and they have complaint of cold water when in Heat Pump mode, so I set it to High Demand.
Since I haven't bought the unit yet, I don't have you guys' experience with the heat pump having no issue in raising from 110 to 140 with no resistive rod activation. If there is a sensor issue (A101, A102, A105, A106, for example), the HPWH with switch to the electric element. Can you just unplug and replug-in the device to let it reset? I'm deciding between this Rheem unit and a Sanden Eco2 (formerly SanCO2) because I want to be able to schedule them to go to max temperature just before peak electricity rates kick in (in Oakland, CA on PG&E this is at either 3pm or 4pm depending on standard or EV rate schedule). 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.
(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.) tank. Can you double-check your settings? Something that bit me when installing a Professional Prestige ProTerra 80 gal is the noise it generates. It also can be set via timer, not sure how many timers/day, but you basically only need 2, 110, and 140. Fan is very low noise, and while I can hear the compressor, I wouldn't consider it bothersome. What climate zone on you in? I would still like a better resolution so anybody with this issue please speak up if you have a breakthrough! 120 is generally considered the minimum safe temp. 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.
Just installed the Rheem 80gal. Until I hear confirmation that Rheem has fixed the quality issues, I can't recommend the 5th Gen Rheem/Ruud hybrids. Any update on the 5th Gen Rheem noise issue. I brought home a sound pressure meter from work to get sound levels and used a spectrum analyzer app to get the sound spectrum. Like our peak hot water usage, the furnace is part of our morning routine, our house dropping to < 60 while we sleep in the winter. 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. 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? 5. You need a big enough space and may or may not want to include inlet and outlet ducts. It's so bad we might put it in electric mode during the daytime, if it doesn't need to run very often. 
Not sure what the cutoff temp would be that causes heating elements to kick in though. Slightly less noise than the GE GeoSpring 50 that I replaced. There are many harmful bacteria that can survive and multiply at 110 F. Of course, you may never use the heating element if the unit stay in heat pump mode. Is a 2022 unit with a noise fix? 3 Electric Only this turns off the heat pump. I was just saying that day-to-day we keep it at 110F. ~4 showers per week. Might be that concealing it possibly shields Rheem/Rudd from issues reported by the consumer. In the 2021 model that I have in my main house, it went into serious alarm mode (loud beeping) when the tank temperature dropped too low during a prolonged period of high demand, and I didn't see any sign that the heating element kicked in. But no more than 6-12" long, through a single layer piece of sheet-rock. Also going to add some dampening material to the wall. I just note that the utility room tends to get pretty warm when either the furnace or dryer is on, but this is mostly ambient heat exchange we aren't deliberately trying to warm the room by directing dryer exhaust air internally. I agree that running the tank at 140F+ a few times a year is a good practice to kill any possible legionnaires bacteria. (will also ask PEC tool library in SF) See attachment for the current rate plan.
Then I want to schedule their temperature setting to be so low that the heater won't turn on unless we have a full house of guests visiting for a rare holiday or similar, and then turn back on after 9pm when the electricity rate schedule gets cheap again. We have an 80 gal. My use case is 4 adults full time (3 shower heads) with an occasional extra 2 adults. I plan on purchasing the 80 gallon professional unit for my new construction in Guatemala and I will be on off grid solar. This isn't part of your post, but I want to mention that it is important to consider location when installing a HPWH. At 240V, that's about 1.5A. A fairly current Rheem manual is pretty silent on the specifics, but it will talk to your phone. 49 cents vs. 17 cents. Every other time slot is always empty.
2:55pm = 110 F
But here in Oakland, California with my electric car I am on an EV rate structure that is drastically higher during peak hours. I have no idea what the unit does. How Can I Change Security PIN on my Android Phone? Done by NREL - Laboratory Performance Evaluation of Integrated Residential Heat Pump Water Heaters (another poster provided a link I have lost) 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.
The AO Smith blended resistive with different set points for activation with the HP and resolved draw down demand with an 80 gal. 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. Does anyone have a sense of when the heat pump would struggle and trigger the resistive rods to kick on? I suspect the control works this way to minimize complaints about slow recovery times. 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. Do Space Heaters Use a Lot of Electricity? Generic reply about the Rheem because Rheem/HomeDepot sensors comments and questions. Now, what I described is the worst of things. Vacation period is setup, but what happens? 
Scheduled setback to 120F during peak rates (3pm-12pm) and continuing into late morning (until 10am), then 140F off-peak 10am-3pm. Sometimes it does it after a shower, but I have also seen it happen in the middle of a steady state operation with no hot water being used. 4. If set to High Demand, usage spike from normal daily of 2kwh to 20-30 kwh daily. If this bacteria is a concern in your area, you can mitigate your risk by maintaining the tank at that temperature. I would of course much rather not have to schedule the stair step, especially based on seeing the Apple iOS app store reviews of their very buggy app not communicating with the unit itself. 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. It dips as low as 275W and peaks about 403W. So this is how my installer purchased my unit. So if you want to only heat water at 4-5am on TH, you can do that for any temp you select. However, we do not guarantee, and accept no legal liability whatsoever arising from or connected to, the accuracy, reliability, currency or completeness of any material contained on this site or on any linked site.
- strap to walls with BR isolators (or dep. 
Is there an affordable/recommended 240V equivalent to the Kill-A-Watt meter (plug-based) or would I need an Ammeter (clamp) or even hard-wired-in data logger? Lowering the temperature can save you money on your energy bill, but anything lower than 120 degrees could reduce your dishwashers performance. You can see that I have no vacations set up. FWIW, my hybrid was (and still is) set to 140 degrees, which may increase the need for "prewarm?" It generates a pretty loud tone that you can easily hear in the house. The utility room is 840 cubic feet (just measured). Once I install a regulator I'll set that to 122 or so, and set the heater to 130. Can I ask who installed the water heater?
that app times seem to be off, and overall not trustworthy: showing no usage every other hour (only 2 hour granularity?!? Here in NH we have flat rate electricity, but I do have Solar. I have no idea but maybe one of the experts will offer an opinion.
The AO Smith is rated at 51 dB. In order to kill legionnaires bacteria it is recommended to get the tank to 140f for 32 minutes several times each year. https://patents.google.com/patent/US8385729B2/en, https://v3.myrheem.com/360/Rheem/WH/docs/hybrid-heat-pump-rheem-hybrid-heat-pump-spec-sheet.pdf, https://www.amazon.com/gp/product/B00A0RHSJO, https://www.amazon.com/gp/product/B07JHKZ3L4. Rotate the thermostat to your desired temperature. I agree with William. My Econet app is constanly urging me to swithc to Energy Saving mode. Also, I ran across a comment where somebody said the new models seem louder than the older ones. cold ambients reduce heat pump capacity and COP) and also the current temperature of the water in the tank.
According to this patent you have 3 options. The spec sheet gives max amps, but I assume that is for when the coils are running at max. 
Cecilia Harsch has been writing professionally since 2009. I was surprised and disapointed to see this and would much prefer it stay purely on heart pump mode. All good.
wish there was user-accessible data on top-middle-bottom tank temps!). Highly recommended. Are Expensive Building Components Necessary? Here in California, with solar, I thought it would be beneficial to set the schedule to shift usage to 3 a.m. to prevent usage during TOU peaks and A/C during evenings. Of course the price is a slightly longer time before hot water reaches the faucet. 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. 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. I have this same question. Thanks for the suggestion ! Do you have your tank set to 120 degrees or something higher? The Rheem unit uses R134a refrigerant like the modern USA automotive industry, so it cannot get as high as the Sanden CO2 solution but they claim to be able to reach 145 F on their datasheet. Insert a small flat-head screwdriver into the slot on the thermostat dial.
Located in Seattle, WA. Thank you very much. From the Rheem site: Vacation Mode lowers the set temperature to conserve water and energy while youre away on vacation. . When I replaced my gas water heater with a HPWH, it was a three-step process. Side goal would be even more relative capacity. Home Depot's Halt on Rheem Hybrid Water Heaters. I read these heaters loose 1 degree per hour and I doubt this loss is linear. I forgot to add in my initial post the response I got from Rheem Tech Support: "In pre-warm mode, the unit does use the electrical elements. We take great care to provide quality information. So now I have no hot water expense now and no gasoline expense as drive an EV for transportation. You could have a refrigeration leak it dirty filter or coils. I have the Rheem 80-gallen hybrid heat pump water heater. Installing Rigid Foam Above Roof Sheathing, Climate Activists React to Dont Look Up. It does time schedule the modes fine. Not so good, since I am poised to spend the night out of town. After following 3 different forums, people are reporting that Rheem has solved the noise issue on the units manufactured after Jan 2022. The attached picture shows mine during installation, before further support, insulation and condensate line. Jonathan you may want to consider filing a complaint form with federal Trade Commission FTC. I guess you could check it religiously or install an inline filter. Energy saving mode runs the heat pump but will also turn on the electric element if recovery is taking too long. Does anyone know why it does this? Rheem phone support told me they are not Rheem employees and are a contracted out phone support center business. As for the install, please be sure to indeed add a heat-trap as recommended in the manuals. Hi.
If you have a noisy unit that came from a supply house, replacing it from the same place will likely not solve your problem until the supply house has depleted their supply stock and they get more recent units. I think Seattle is Climate Zone 4.
It's important to determine whether or not your electrical service can support the HPWH. 
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? document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Follow Me on Pinterest Knowing what I know now (nobody told me!) resistance elements (for price/availability reasons; hope to not ever use them), in vented crawlspace, w/mixing valve, Berkeley CA. I did check our electrical capacity at the time and there was plenty for a HPWH, but since then we've put in a heat pump furnace, so I don't know offhand how much is left.
Thanks for any info you can provide. 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. I am NOT happy with the temperature control hysteresis, it allows too wide a drop before restarting the heatpump. I didn't have any issues w/recovery in heat pump mode vs. energy saving. Theres a bunch of information online about how to do that, but from my own experience, its pretty straightforward.
I get municipal water from Seattle Public Utilities. In general I am very happy with the low energy. Hope thats at least a little usefulgood luck and let us know how it turns out! Any idea whether Rheem auto-push firmware updates into the heater? 8am = 135 F I think you are over-thinking this. Due to distribution cost going both ways - is it better to use when producing with solar but it is minimal. I run the water heater in heat pump mode for maximum efficiency. 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). 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. Never miss a single article, review or tutorial here on AskDaveTaylor, sign up for my fun weekly newsletter! 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. Both are 240 VAC, but the 15 amp unit has a smaller heating element for homes with less capacity in the panel. I routinely change the Rheem from 110 to 140, after being at 110 for hours or days. 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 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?! Oh, and if you also have a Nest thermostat, you can hook them together so that when the Nest goes into away mode that the Rheem water heater also automatically switches to vacation mode too. It averages around 330W.
As it is, with temp set to 124, it frequently drops to 120 or below and my wife likes her showers hotter than that (30 ft pipe run?). Follow me on Twitter Nor a resource to find 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. So those storing energy at higher temps are probably loosing efficiency and not gaining as much as they are think doing that. My Rheem central heat pump default control settings seem to be selected to maximize comfort at any cost. Your email address will not be published. You dont want air exchange between the garage and the living space. There is no way to recover this saving a dollar here and there. If anybody has experience quieting this things I'm all ears @Eric Earnst - not an expert but FWIW: 
Worth installing heat-recovery on shower to keep HP off until morning on 2 shower evenings? 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". 2:30pm = 145 F (or max) 
In my case that's no issue as the hybrid system allowed me to install in the 'core' of the house near main consumption points instead of the 50+ ft run of 3/4 copper piping we had to get to the vented gas heater. 
This is possibly done to avoid shortcycling the compressor, but as it is it runs too late too long. NO major noise issues. Or the app? vs. more storage if better mixing)? Then when you use some of that water, the green fill level of the cylinder might show half way instead of full. The app and its remote connectivity is nice but it does not provide as much information as you would imagine. 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.
9pm = 110 F @ C Z - by 'status screen' do you mean the screen on the water heater itself? How'd it work out? Turn off the breaker to your Rheem water heater inside the breaker panel. I then hired a plumber to install the HPWH.
Finally, I think the algorithm in the heater should keep upper and lower temp closer, maybe to the point of running an artificial circulator occasionally? 9am = 140 F If the HPWH is in heat pump mode, the electric resistance element should be off. Rheem (unit C) chose to ensure hot water delivery over ultimate efficiency. Thanks for any insights! There is much to be learned about how things were in this report, only problem is finding out how each company is programming now. When I was trying to find out the CFM and W.C. of the fan in their units, they had no clue. [I did the math. Eventually, not wanting to go the whole general contractor route with coordinating two sets of folks at once, I bailed and got another gas water heater. Looking at the flow chart from the patent it is clear this water heater only operate if the resistance element is working. Once you remove the covers, confirm that power to the unit is off using a noncontact circuit tester. Does the app tell you the temp of water in the tank, not just the set temp? Ductless exhaust of cold air to the garage where my beer fridge lives. 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. Make sure to adjust both thermostats if your Rheem water heater has two access covers. For the 2 of us we run 40Kwh/month in heatpump only mode which is less than a good day from our 7Kwh solar system. I recently had a 50-gal Rheem Hybrid water heater installed. I then set it to High Demand 138F on weekends when guests arrive, so they can mix with cold water to make hot water tank last longer if they do multiple water jet tubs simultaneouly.
It really 'traps' the heat in the short 12" upward strech. And it would allow for safer (bacteria) core temps yet avoiding scalding. Nobody wants to burn a 140 watt lightbulb for an hour, every 6 hours no matter what. Unplugging and resetting was the only way that worked for me to get our Rheem hot water heater out of away mode. I'm not sure if that will prevent it from turning on, which is the goal. 11pm = 125 F. So, basically, using the Rheem's max temperature of 145 F as thermal energy storage and coupling the output to an anti-scald tempering valve that regulates the output temperature to, say, 125 F. The Sanden unit would be even better at this because it has a 120 gallon tank option and claims to go as high as 175 F due to the CO2 refrigerant supercritical thermodynamic cycle, however it looks to be $2K more expensive with fewer systems installed which makes me worry about service when something inevitably goes wrong.
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