Like with most things, a lot of noise coming from your hot water recirculation pump isn't a good sign. Ask an Expert Home Improvement Questions HVAC Questions Navien NPE-240s with external recirculating pump. Thats kind of why the water heater still has to do some work (it turns on); its not a lot of heating but some heating is usually required. You can turn it off during work hours, over the night, when you go on vacations, and so on. Consider yourself lucky if this installation hasn't damaged your circulating pump inside the unit. You need to run white vinegar through the system, to descale the water heater. Turn the unit off. 2. Using a corrosion-free flow sensor made of stainless steel is a better option. I think it's 100F. Costs associated with hot water circulation pumps (parts + installation + DIY savings). However, that shouldnt happen if you have turned the pump off. Because a water recirculating pump provides us instant hot water. The default setting is usually around 120 degrees Fahrenheit. W2 Wire Thermostat Wiring (2nd Stage), Thermostat Wire Color Codes For 3-8 Wire Thermostats (Color-By-Color), How Many Therms Of Gas Per Month Is Normal? This may require chasing the supply lines. Close the isolation valves to the cold-supply and recirculation lines. Hi Patrick, thats a good insight. In compliance with California's . Both of those spots are problematic though. ($0.05 $0.22/h), How Much Does 1000 Watts Cost Per Hour? I can figure out occupied or not from a home automation or alarm system. A place for plumbing advice and help. Browse other questions tagged, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site. Bosch Tankless Water Heater Troubleshooting [A Complete Guide], Bosch Tankless Water Heater Error Codes [Ultimate Guide], Bosch Tankless Water Heater Wont Ignite [7 Easy Solutions]. We have 6 Navien NR-210A manuals available for free PDF download: Service Manual, Operation & Installation Manual, Installation Manual, Owner's Operation Manual, Quick Installation Manual Navien NR-210A Service Manual (179 pages) NR/NP Series Tankless Gas Water Heater Brand: Navien | Category: Water Heater | Size: 21.79 MB Table of Contents However, if it generates annoying or buzzing noise, there is something wrong with the system. Turn off the power before removing the filter. Close the cold and hot water inlet valves and then drain the water heater. This setup is very similar to the one I have with my 40 gallon tank setup with recirc/return line by using an X10 home automation module to program the remote to turn the pump on for 4 minutes and automatically turn off whenever someone presses it before taking a shower. Only 13 left in stock - order soon. https://www.ebay.com/itm/12V-DC-MOMONTROL-RM11-/350575987090?hash=item519ff50992, Navien NPE-240A2 External circulation question, Navien NPE-240A and HotButton - DIP switches and parameters, Flushing Navien 240A set up for external bypass, Navien NPE External Recirculation Confusion. The recirculation pump is fixed on the water heater. Also, did you wire the PB from the Hot Button kit or only use the remote? Note on tankless hot water heater recirculation pumps (double trouble solved). It also may be as simple as a dip switch in the tankless unit itself. Place a bucket underneath it to catch any water that drains when you remove the filter. A recirculation system is a hot water line that runs throughout the house and returns back to the water heater. Is there a way to tell if the cold pipe is circulatory/return line or cold water from the mains? It should come out of the hot water port. If that fails, then the pump impeller might have disintegrated or the system water pressure may be below 0 at the pump suction causing the pump to cavitate. However, many first-time and beginner road travelers and RV How to Connect a Generator to Your Tiny House Without a Transfer Switch. However, this is only a temporary fix. He said he tied in both in the master bath and the kitchen but it seems if that were the case at a minimum they would have hot water quickly. So, saving water is the main reason for calling a recirculation pump eco-friendly. However, the hot water had to travel from your water heater to the faucet for you to use. Well, If you overuse your pump, it will start malfunctioning. Patrick. If you have come back from a vacation, first turn on the main water valve. I would appreciate any help and insight you can offer. The issue is most likely, the flow sensor inside the unit is not spinning correctly. Prevention of Modern Slavery Progress Reports. Hello David, well, the additional costs are a con here. Navien ComfortFlow is the first and only system that incorporates a built-in insulated buffer tank and recirculation pump. On the other hand, if you find no foreign stuff, ensure you purge the air out of the system. Our articles, products and services are for informational purposes. some homes require multiple recirc lines in order for all fixture group to benefit. To learn more, see our tips on writing great answers. It looks like you're using an ad blocker. It shows that the water adjustment valve is not operating properly. Most importantly, the installer fails to mount the pump on the vibration isolators. I was under impression that with the recirculation pump this wouldnt be an issue (the wait time) and the fact that the water is just warm otherwise feels wrong. It means the circulation pump is not working correctly. Second, you can use a flex connector to isolate the pump. Tankless Water Heater Breaker Size Calculator: What Size Breaker? Locate the power button and press it to turn on the heater. It is important to note that recirculation pumps dont work continuously; they are used only when we open and close the faucet. With the NRCR you can set your own schedule with a remote accessory and tailor the integrated pump to your lifestyle or scheduled needs. Buzzing noise out of the recirculation pump will be general if you or your plumber dont mount the pump securely. Thats all for today. my understanding of the Navien with internal recirc pump is that they work with either an external dedicated return pipe or an internal bypass loop located within the water heater cabinet. There are more options, for example- you can buy a wifi socket. The E615 tells you about the irregularity in input and memory. 2. Both types of systems have similar pros and cons. 30000466A Navien Circulation Pump NAPU9GLPCT33 . Another sign is the error code display. Can you turn it off in a tankless that has it built in? Some brands/models dont include it. Apart from that, you can easily turn it on/off on your mobile whenever you wish. Going off the grid sounds noble, satisfying and eco-friendly. The estimated annual operating cost of the Navien tankless water heater, based on the yearly estimated residential use per US Energy Department test criteria, is $191. Then, use the arrows to set the desired temperature. However, whenever I turn on the cold water at the kitchen sink the tankless unit starts to run (heat water) even though I dont want heated water. Ensure that all hot water faucets are closed, and ensure that the internal circulator and any external circulating pumps are off. We don't tend to provide any plumbing advice or any advice that should come from a certified professional. I don't hear the heater "fire up" right away when the tap is opened and can't tell if the recirculation pump is running. Are these pumps just a luxury that enables you to get hot water lightning fast, or do they actually save you money? Where did you find that info? Correcting Navien Tankless Hot Water Heater Installation, We've added a "Necessary cookies only" option to the cookie consent popup, Tankless water heater - not consistent hot water output, Plumbing Manifold Use With a Tankless Hot Water Heater, No hot water if hot water recirculator pump is shut off, warm water only when we replaced the hot water heater with a tankless heater. Follow the steps below to clean your Navien water heater; Note: If you are unsure of your ability to handle this task, hire a professional to clean the heater. We can go from there with up to 3 hours of dedicated live coaching on the telephone if needed. Can this be moved to another sink in the house that is not used as often ? Some of our partners may process your data as a part of their legitimate business interest without asking for consent. Here are the leading causes of strange noises coming from your heater; Hire a professional or installer to repair your heater to avoid damaging the heater and voiding your warranty. The remote control module sits beside this area (I have it floating but I'll put double stick tape and mount it to the interior soon) and the antenna lead drops through a grommet (conveniently already available at the bottom of the unit near the pcb) to the outside. (42-167 Amps), How Much Propane Does A Tankless Water Heater Use? . It is located on the lowest corner opposite the on and off button. If you fail to stop the noise after trying all the steps I mentioned, I bet there is a complex problem with the unit. Watt recirculating pump installed on the water heater (pump plugged into standard 110/120V outlet, 3/4-inch pipe thread connectors, valve). Not really. Is there the same solution for NR240A? Works great and saves the copper pipes. These are the 3 most often recommended brands for tankless water heaters with recirculation pumps. However, if you want hot water fast, these on-demand heaters are not ideal. Below are different Navien water heater error codes and their solutions; Navien error code 003 how to fix indicates that there is an ignition failure in your unit. That install is exactly as specified in the newer manuals. Working well so far. It is propelled only by water pressure. Open the pressure relief valve. So you'll find the same info whether you're looking for the Navien 240A manual, the Navien NPE-240S manual, Navien NPE-180A manual or similar. Side question: are you able to explain to me what always on means? The upfront cost is a major deterrent when deciding if it makes sense to install a circulation pump or not. You can adjust the temperature by the below 10-degree increments, depending on the temperature range: 98 F-120 F/ 36 C-50 C 1 F or 0.5 C increments, 120 F-140 F /50 C-60 C Press for 2 seconds to adjust in 5 F or 2C increments. In existing homes, adding an additional pipe for a full recirculating pump system is often too expensive; its just dont worth it, according to HVAC specialists. Is it possible to create a concave light? Is there a check valve? Free returns are available for the shipping address you chose. If it does, you could trigger the operation to save money whenever your system detected 'away' or however you've got it programmed. All you have is a crossover valve underneath a sink somewhere also when plumbed correctly, all of that will only function with proper dip switch settings, perimeter settings, which is Pacific per heater model. I agree the user manuals are very helpful. Troubleshooting Navien NPE-240A Internal Recirculation Pump - YouTube 0:00 / 4:21 Troubleshooting Navien NPE-240A Internal Recirculation Pump RCGooner2002 240 subscribers Subscribe. Navien Flow Sensor. The only place that quickly gets hot (and really hot) is the guest bath which happens to be right next to the water heater. Navien NPE-240 A Recirculation Linewww.amazon.com/shop/miheatingguyMilwaukee 2131-20 M18 ROCKET Dual Power Tower Lighthttps://amzn.to/3pe2hYHMilwaukee M12 Surge Hydraulic Driver Kit #2551-22https://amzn.to/3n5offbMakita E-01563 Impact XPS 3 Pc. Tankless Water Heater Wire Size Calculator: What Gauge Wire (AWG)? Just like everything with these three characteristics, it is time-consuming and challenging. With two pipes, you can create a loop between the water heater and faucets. Should I keep my 5-year-old electric tank heater as a storage unit if I am about to install a new gas tankless heater? Did you mount the contact switch next to the Navien? It shows that the heating return thermistor is not working correctly. Get in touch with Navien technical support at 800-519-8794. here are some problems that you may have to deal with in the future or have experienced already primarily found in older Navien heater models; Though not a common occurrence, it is still essential to know how to identify these issues. I am wondering if you have a Navilink and if you by any chance went in like I did and clicked the "disable/enable button" and turned off the schedules, I did change that - thinking it was a glitch that on first launch "enable" was showing. Then, read the manual on Navien tankless water heater how to reset. This can be determined based on the following factors: The average water usage for different hot water uses are as follows; Check this too: Insinkerator Hot Water Dispenser How-to & Troubleshooting Guide. If you've got a tankless water heater installed that doesn't come with a built-in recirculation pump, then in such a scenario, a separate recirculation pump can do the trick for you. This serves two functions: You save water. 1. You can isolate the pump from the vibration in two ways. Fits These Models Generally, your Navien recirculation pump will produce a humming noise because of the wrong size primary loop, not purging the recirculation pump, or foreign materials getting into the pump. We trusted him and thought everything was just fine as we were getting hot water throughout the house. House generators are quite expensive. Advantages and disadvantages of hot water circulation pumps. Make sure there are no loose connections. Then remove the cold water filter off located next to the cold water isolation valve. We will presume that youre buying a hot water circulation pump for a household of 4 and that each person wastes about 2 gallons of water per day (mean value of Oak Ridge National Laboratorys study). It means that there is an issue with the air pressure sensor. Does It Save Money? Error Code E438 It means the circulation pump is not working correctly. To remedy this issue, turn off the heater for some time and restart it. For example, if you have a person showering and another individual shaving. For example, if you get the tees backward, the recirculation pump will not function properly. First, open and close the pressure relief valve, which is located near the units outlet. Is this correct for the function of the system? A water recirculating pump is also similar to this. You can return the item for any reason in new and unused condition: no shipping charges ; To remedy this, you can take the two clamps off the sensor, pull it out and clean it. I broke down all the possible reasons that cause your Navien Recirculation Pump to produce a humming noise. It can also damage your main water heater and can create recirculation problems. Is the cable harness compatible? Foreign materials like small pebbles may get into the recirculation pump. You can turn off the recirculating pump in various ways. Now, when installed, the recirculating pump makes it seem that the hot water starts flowing right away like magic. Turn off the electrical supply to the pump Locate the small bleed screw on the pump Remember the pump is full of water, so place the cloth underneath the screw Turn the screw very slowly (less than a quarter turn is usually enough) to allow any air to escape Tighten the screw Mop up any excess water Turn the electrical supply back on The user manual for these devices (of which I own two) provides a pretty good plumbing diagram for proper install. It tells you about the abnormality of the external tank thermistor. Flush the vinegar out of your water heaters. Check the thermistors condition along with pump wiring connectors. I recommend you disassemble the recirculation pump from the unit and inspect it carefully for foreign materials. You can also identify and fix them yourself. Always on checks in every 30 minutes and turns on the heat recirculation if the water is 9 degrees under the water goal temp. It only takes a minute to sign up. If water comes out from the pressure relief pipe, this indicates that the issue is not with the unit but with the house's plumbing. It depends on how the recirculation pump is installed, and some other factors, plumbers usually know this stuff pretty well. Find applications from Grundfos related to this subject. I'm fairly handy with DIY plumbing, but not and expert and I know when I am out of my league. I kind of feel like he is trying to get away with something that wasnt installed properly but hopefully I am wrong. Unfortunately, the heat exchanger cannot be fixed and has to be replaced. Way too many variables to even begin to diagnose online IMO. It can take anywhere from 10 seconds to 1 minute for the hot water to reach the faucet. Depending on the age of your Navien NPE-A model, he did you a favor. It could be open or shorted. Can I swap out the mainboard in the NR240A to an NPE240A board to get all that features? NEC 310.16 Table: Copper And Aluminum Wire Ampacity Chart, NEC 310.12 Table: Wire Sizes For 100-400 Amp Services (83% Rule), kWh To Therms Calculator + Conversion Chart (1 kWh = 0.03412 Therms), MMBTU To Therms Calculator + Chart (1 MMBTU = 10 Therms), Therms To MMBTU Calculator + Chart (1 Therm = 1/10 MMBTU), AWG To Circular Mils Chart (For 4/0 AWG To 20 AWG). If any of them are loose or disconnected, your circulator pump won't work. Not Mounted The Pump Securely or Isolate It, Navien Tankless Water Cycles On And Off [5 Easy Solutions]. Turn off the recirculation when the house is not occupied, in order to save even more energy. Why do small African island nations perform better than African continental nations, considering democracy and human development? Low gas supply which prevents proper heating of water, Damaged flow sensor preventing proper supply of gas to the heater. You can set it to run in the morning before work, and in the evening. You can crack open the manual for your tankless heater and check if it comes with that option. This on-demand water heater has a lower carbon footprint, is energy efficient, and has a longer lifespan. Do new devs get fired if they can't solve a certain bug? It usually occurs due to an open or shorted sensor. Navien Recirculation Pump Noise [4 Easy Solutions], 02. You can contact a plumber if necessary. Though we share resources, information, and educational guide on plumbing & DIY projects, the content here is not a substitute for professional guidance. Categories Home Improvement, Patio, Lawn & Garden, Plumbing, Tools, Water Valve Handle Broke Off? Next, hook hoses to the valves, then open them to drain the water. If your pump does this, then it is to be expected, otherwise it sounds like the hot and cold are mixing at some point and you'd need to find out where . Remove the inlet filter and wash it under the running water with the help of a brush. As well as any future additions, Usage of household gadgets that require hot water, Automatic dishwasher 14 gallons or 1.5 GPM, Washing machine 32 gallons to wash the clothes or 2 GPM. I recently had a 240A2 installed. Ensure all return and supply lines are open and check the 2-way valves direction. It sounds awful and not like any other recirculating pump I've ever heard. All you have to do is browse through our guides, answers and personal experience documentations to find out what you should (or shouldn't) do when going off the grid. = heat loss from the circulation system [kW] Open the hot and cold service ports and turn the pump on. To install a full recirculating pump system, you need to consult with a plumber because you will need an extra pipe. Fortunately, Navien water heaters recycle hot water and always provide hot water. Thanks for contributing an answer to Home Improvement Stack Exchange! FREE Returns . Examine the wiring and thermistors condition.