Any tips on where to verify if I have a dedicated return line? Great article!! Quick summary on costs: Recirculating a pump is certainly useful if you want hot water quickly. For example, an open or shorted sensor causes this issue. Then remove the cold water filter off located next to the cold water isolation valve. Without the need for extra piping, this type of hot water circulation pump system also comes at a much lower cost. Check this too: Electric RV Water Heater How to & Troubleshooting Guide. Depending on the age of your Navien NPE-A model, he did you a favor. On top of that, the recirculating pumps also return the cold water in the pipes back to the heater. Find products from Grundfos related to this subject. Weve tried to include every concern you might have regarding turning off the water recirculating pump. I installed this system a few days ago and I've been trying to trouble shoot the noise that's coming from the re-circulation pump. Can you turn it off in a tankless that has it built in? I got a Navien NPE 240A2 installed in my home with dedicated recirculating line (hopefully I got the lingo right!) Is the cable harness compatible? Press either the Up and the Down button to switch between any of these recirculation settings: sounds like you need a different plumber to assess your situation. How Does A Hot Water Recirculation Pump Work? There are special tankless water heater recirculation pumps for Navien, Rinnai, and Rheem units; we will cover them all. Hopefully its clear which is which when Im down there. T = the water cooling, normally 5 C determined at the farthest consumption point [C]. A water recirculating pump is also similar to this. Grundfos water recirculation pump may troubleshoot, Grundfos circulating pump is making sounds, Easy DIY Media Cabinet Build with Basic Tools, From Cast-Iron to Stainless-Steel: How to Replace Your Kitchen Sink, While theres no water in the pump, do not turn on the recirculating pump. Fortunately, Navien water heaters recycle hot water and always provide hot water. These are the kinds of issues that can occur if you aren't aware of the automatic appliances that are connected to your system (and don't shut them off along with the water). You will not get hot water instantly. Get in touch with Navien technical support or a professional heater repairman. The exhaust is overheating. Some brands/models dont include it. Start by turning off the service valves and removing the hoses. The best answers are voted up and rise to the top, Not the answer you're looking for? If required, replace the thermistor. Navien's patented ComfortFlow system is the first to include a buffer tank, recirculation pump and fine-tuned controls into a tankless water heater, resolving the cold-water sandwich effect* and issues of minimal flow rates commonly found in other tankless water heaters. Where does the circulation return line tie in, and where is this in relation to the Naviien unit, other fixtures, and appliances in the home? It tells you about the abnormality of the external tank thermistor. 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. Thats why most homeowners prefer installing the recirculation pump without the extra pipe. Legal Disclosure:Lildutchuncle.com provides and shares information on plumbing, heating & air quality, home improvement, and other DIY projects. You have to inspect the sensors connectors to confirm they are not wet and fixed correctly. When its time to work with a recirculating pump, you should follow some instructions to avoid further hassles. For example, you may damp it into a bathtub, pushing the water through the isolation side on hot. Some pumps, in order to avoid needing a dedicated return path, will recirculate the water via the cold water supply, so getting some hot water from the cold supply would be normal in this case. The cold water pipe coming from the wall goes into the domestic water inlet on the tankless heater, as it should. The major difference with hot water pumps in new homes is that you can install a full recirculation pump system (Type #1). Here are some of the leading causes of cold water production; Which means there isnt enough time for the water to heat up. Locate the power button and press it to turn on the heater. Its really an easy task to do. Water recirculating pumps just circulate the water; the water pressure should stay the same. I'm fairly handy with DIY plumbing, but not and expert and I know when I am out of my league. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. By accepting all cookies, you agree to our use of cookies to deliver and maintain our services and site, improve the quality of Reddit, personalize Reddit content and advertising, and measure the effectiveness of advertising. Set the pump in the bucket and plug it in. It looks like you're using an ad blocker. When attempting a flush of the system, I shut off the hot and cold valves that lead into the heater. Connect a regular garden hose to the hot side service valve. Solar panels, wiring, old TVs and sometimes DIY powerwalls. What video game is Charlie playing in Poker Face S01E07? Page 12 Turn off and discontinue use of the water heater if any of the vent . The air will need to be bled out of the system. These on-demand units need an even longer time for the hot water to reach a faucet because the heater has to first heat the water and then send it along to the faucet. Yes, you can turn it off by yourself. Open the service port on the host side and the isolation valve on the cold side, pushing water through the system. The water heater is set to 120 F (49 C) by default. It is brand new in the original Navien factory packaging and is guaranteed to fit and function properly. Manage Settings Turning off your water recirculating pump reduces damage. Locate the reset button on the heaters front control panel. Consider yourself lucky if this installation hasn't damaged your circulating pump inside the unit. To calculate the size of the heater, you will need to add up the amount of water required at a particular time. 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]. Costs associated with hot water circulation pumps (parts + installation + DIY savings). You also have to flush the heat exchanger. Like with most things, a lot of noise coming from your hot water recirculation pump isn't a good sign. The error code E445 tells about the defect of the bypass mixing valve. We were advised of this upon installation. When the heat exchanger starts to crack, it creates a gap that can escape toxic exhaust gasses. Well, If you overuse your pump, it will start malfunctioning. Then re-insert the filter and screw it back in place. It has a timer that turns on the pump at regular intervals, mostly during peak usage times. Hope this illustrates well why this might be occurring; its a pretty standard thing. Then, turn it on again. So, ensure you purge the air out of the recirculation pump to operate the unit quietly. Ensure that all hot water faucets are closed, and ensure that the internal circulator and any external circulating pumps are off. That may present a problem in the summer when you need cold water; turning the pump off during the summer months solves the problem. Is this a common drawback with the under-sink crossover valves, for the heater to turn on when a cold water faucet is turn on? It's unfortunate he's not around to explain all this to you. It clips on the side of the PCB board without screws and then you connect a ribbon cable to the PCB. Ensure you mount the pump securely. So, saving water is the main reason for calling a recirculation pump eco-friendly. It depends on how the recirculation pump is installed, and some other factors, plumbers usually know this stuff pretty well. Did any DOS compatibility layers exist for any UNIX-like systems before DOS started to become outmoded? Open the hot and cold service ports and turn the pump on. Navien tankless water heater recirculation March 31, 2016 At the push of a button, Navien 's HotButton accessory activates the internal recirculation pump and gas-fired burner to heat up the water in the supply lines. The operations manuals above cover all Navien NPE-A and NPE-S series condensing tankless water heaters. Check if there is any gas leakage before turning it on after a couple of days. Separate Recirculation Pumps. Remove the front cover of the water heater. Check the thermistors condition along with pump wiring connectors. Can I swap out the mainboard in the NR240A to an NPE240A board to get all that features? We turn it off because it will waste gas. Purchase and install a rocker switch or "doorbell" style buttons to activate the NRCR "on-demand" mode to prime the pump for use only when you want it. link to Why Does My RV Carbon Monoxide Detector Keep Going Off? The consent submitted will only be used for data processing originating from this website. A hot water recirculation pump can be sized for a given system using the following formulas: Water flow qc = /T x 4200 Navien Flow Sensor. It means there is some issue with the flow sensor or switch. Of course, the most important part is the pump itself, so well start with that: These are the standard building blocks of every recirculation pump for getting hot water quickly. We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites. Make sure the major electrical cord is grounded correctly. Check to see if the water valves are open. 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. Remove the screw that secures the air intake filter and then remove the filter. Unplug the power to your Navien water heater. It is propelled only by water pressure. If we take that the average price of water is $0.18/gallon (according to Statistas 2019 study), heres how much you can save on water with a recirculation pump: Water Savings = 2,920 gallons/year * $0.18/gallon = $525.60/year. Turn off the device for 30 minutes and then restart it. 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. You can isolate the pump from the vibration in two ways. The heater turns off automatically when the flue pipe surpasses 149 degrees Fahrenheit. It provides information about the problem with the fan motor. You can isolate the pump from the vibration in two ways. Now, that comes to the question, can I turn off my hot water recirculating pump? Do the plumbers explanations make any sense at all or does it sound like BS? if your water heater has 5 connections ( CW in; HW out; Recirc in; condensate ; gas) then the recirculation is coming backing to the water heater. Examine the thermistors condition and pump wiring connectors. I am contemplating getting the NPE-180A and controlling the pump with a remote control in each bathroom. You dont have to install an additional pipe. The hot water recirculation pump works by: The very phrase recirculating comes from this pump returning the unused hot water back into the tank. Grundfos small circulators are perfect as hot water recirculation pumps for commercial and domestic hot water applications. Solution: Ensure all return and supply lines are open and check the 2-way valve's direction. This gives users hot water when they need it, saving water and money. An open or short thermistor can be the root cause of this problem. = 4.5 x CFM x h (std. IF it does, could it be controlled remotely? 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. I added an additional remote for a total of 3. The buffer tank eliminates the "cold water sandwich" effect and issues of minimum flow rates commonly found in other tankless water heaters. Therefore, the total peak demand of hot water needed is the ideal size of the heater you should get. To install a full recirculating pump system, you need to consult with a plumber because you will need an extra pipe. For a better experience, please enable JavaScript in your browser before proceeding. The upfront cost is a major deterrent when deciding if it makes sense to install a circulation pump or not. Side question: are you able to explain to me what always on means? This is where the timer and temperature sensor come in. Turn the unit off. I obviously dont know much about this but the plumber is giving reasons that feel like he is making up dont make sense to me: 1. If we dont use it, we waste a lot of water. We hope we were able to help you out with our guide. This chapter will reveal all the possible culprits that cause the recirculation pump of your Navien to make a humming noise. Navien Recirculation Pump Noise [4 Easy Solutions], 02. 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. However, the plumber branched this off into the circulation water inlet. Therefore, the only task you can attempt on this list is the gasket replacement for the leaking water connection. Next, clean the dirt-trap. Start by removing it from the heater so you can clean it properly. That is a premium service however. This type of hot water recirculation system is most appropriate for new homes; homes that are in the 3rd or 4th part of the building process. Make sure the exhaust pipe is not obstructed. It shows that the water adjustment valve is not operating properly. What Is the Difference Between 'Man' And 'Son of Man' in Num 23:19? However, I have envious of those who have the NPE with the hot button and wifi link. If you add a powerful hot water circulation pump at the heater (not under the sink), the hot water will reach the faucet much faster. Make sure the electrical cord is grounded. but you stopped short for me. I noticed my apartment building installed one and at that time the whole water pressure was low. . Troubleshooting Navien NPE-240A Internal Recirculation Pump - YouTube 0:00 / 4:21 Troubleshooting Navien NPE-240A Internal Recirculation Pump RCGooner2002 240 subscribers Subscribe. A hot water recirculating pump will save you money, especially if you have a larger family. The E615 tells you about the irregularity in input and memory. Just locate the air bleeder valve on top of the recirculation system. $197.08 $ 197. They are not without upfront costs or disadvantages, but they do offer the luxury of having hot water almost instantaneously and they save you a lot of water. The setup is correct and the only two settings you need are P.12 for recirculation time and P.16 for length of recirculation line from farthest point in the house. Minimising the environmental effects of my dyson brain. We don't tend to provide any plumbing advice or any advice that should come from a certified professional. It tells you about the improper operation of the flow sensor. One option is to put a relay/contactor between the Navien and the internal pump, so that that pump can only get power when the house is occupied. You can set it to run in the morning before work, and in the evening. A recirculation system is a hot water line that runs throughout the house and returns back to the water heater. You can change the cold water inlet thermistor if necessary. The filter is located at the top left of the water heater. That install is exactly as specified in the newer manuals. How do hot water recirculation pumps work to get hot water fast? I have an NR240A for about 10 years now. Next, hook hoses to the valves, then open them to drain the water. Turns out, make sure you isolate the recirculation pump from the vibration. they have an accessory called the HotButton (PZZZ-00046). To remedy the issue, consider increasing the gas supply to the heater. It may not display this or other websites correctly. House was built in late 1990s and is 2 story, built on a slab foundation. To create an energy-efficient full recirculation system, your pump has to come with these two efficiency optimizing parts. However, if it generates annoying or buzzing noise, there is something wrong with the system. Brand: Navien. Press the reset button to reset your device. Not sure I am understanding. We do all the time-consuming research and testing for you. The error code E736 informs about the issue in cascade communication, and error code E740 indicates that the outdoor temperature sensor is not working correctly. However, the hot water had to travel from your water heater to the faucet for you to use.

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