3. To remedy this issue, turn off the heater for some time and restart it. Please see below for important warranty information and a list of models that this part fits. Examine the wiring and thermistors condition. I have alos checked my HeatBox settings to ensure the temp is set high enough for my domestic supply (set to around 120 degrees). Quite surprisingly for most homeowners, the biggest problem with this type of recirculation pump is getting cold water. Years of experience in the HVAC field have taught him many lessons, not the least of which is that the value of quality and knowledge far exceeds any promised initial savings. Why are physically impossible and logically impossible concepts considered separate in terms of probability? The circulation return needs to come from a loop at an end of the hot supply line. We have one faucet in the kitchen that has instant scalding hot water the second you turn it on . Controling Navien NPE internal recirculation pump Call Navien and explain if yours is older. Understanding Navien Recirculating Water Heater - Heating Help: The Wall Therefore, the only task you can attempt on this list is the gasket replacement for the leaking water connection. Recirculation pump | Grundfos I recommend you disassemble the recirculation pump from the unit and inspect it carefully for foreign materials. The function of a recirculating pump is to ensure that hot water is always available as close to the consumption point as possible, in order to reduce water waste and to increase comfort. The electric recirculation pump uses this other pipe to pump the hot water back into the boiler or water heater. Power Waste An open or short thermistor can be the root cause of this problem. So, ensure you purge the air out of the recirculation pump to operate the unit quietly. I have a new Noritz tankless water heater that includes an AquaMotion recirculating pump at the heater and a crossover valve under the kitchen sink. Navien has an aftermarket add on hot point or something that lets you control when the recirc is on. That is a premium service however. 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. It shows that the water adjustment valve is not operating properly. However, I have envious of those who have the NPE with the hot button and wifi link. In compliance with California's . The number of bathrooms, tubs, dishwashers, and washers. Worst case is your plumber might have to call since they require them to maintain it. 2. Prevention of Modern Slavery Progress Reports. The consent submitted will only be used for data processing originating from this website. The upfront cost is a major deterrent when deciding if it makes sense to install a circulation pump or not. Do you want to know the details? I used a razor and carefully pried each side of the RM11 open to reach the programming switch. they have an accessory called the HotButton (PZZZ-00046). If the problem does not get resolved, replace the motherboard or control board or hire a professional t do it. Manage Settings We do all the time-consuming research and testing for you. Hathaspace Smart True HEPA Air Purifier Reviews, 4+6 Best Whole-House Dehumidifiers (Ducted, Portable), 4 Quietest Dehumidifiers (Best Bedroom Dehumidifiers): 52.1 dB Or Lower, energy-efficient way of getting hot water. 2 Types Of Hot Water Recirculation Pumps Used In Homes, Type 2: Recirculating Home Pump Comfort System, Advantages And Disadvantages Of Hot Water Recirculation Pumps, How Much Do Hot Water Circulation Pumps Cost + Installation Cost + Running Cost? If pointed in the right direction, though, I might be able to solve this. If necessary, replace them all. You can turn it off during work hours, over the night, when you go on vacations, and so on. This error informs you there is something wrong while you reset the unit. As a result, the stuff will rub against the wall of the pump and produce a hum like a refrigerator when you turn the unit on. When the heat exchanger starts to crack, it creates a gap that can escape toxic exhaust gasses. 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? Navien Tankless Water Heater How to & Troubleshooting Guide Here is the list of all the parts you need to install a recirculation pump. Hi Patrick, thats a good insight. Fortunately, Navien water heaters recycle hot water and always provide hot water. It worked perfectly. Low gas supply which prevents proper heating of water, Damaged flow sensor preventing proper supply of gas to the heater. The recirculation pump is fixed on the water heater. 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. (42-167 Amps), How Much Propane Does A Tankless Water Heater Use? The recirculation pump saves on water bills by reducing the time to get hot water. 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). Dont hesitate to switch the tees around if you get them backward. Do Tankless Water Heaters Needs Recirculation Pumps? Reconnect the power supply to the water heater. Learn more about Stack Overflow the company, and our products. 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. He obtained his Bachelor of Science degree from the University Of Texas at El Paso. Air in the line: If there has been a power outage or air has gotten into the line for another reason, the pump can make a lot of noise. Get it as soon as Wednesday, Mar 1. Solar panels, wiring, old TVs and sometimes DIY powerwalls. To understand this problem what I am talking about, you can watch this video: First off, I recommend you check the primary loop. Most importantly, the installer fails to mount the pump on the vibration isolators. Ensure the recirculation pump was installed correctly. Typically recirc lines connect at the furthest fixture and allows hot water to flow through the main trunk lines. The recirculation pump will make a squeaking noise if the installer fails to install the primary loop correctly. link to How to Connect a Generator to Your Tiny House Without a Transfer Switch, Electric RV Water Heater How to & Troubleshooting Guide, Richmond Water Heater How to & Troubleshooting Guide, Insinkerator Hot Water Dispenser How-to & Troubleshooting Guide. Navien tankless water heater recirculation | 2016-04-01 | Plumbing and Can a Hot Water Recirculating Pump cause low water pressure? The main sign of motherboard or control board failure is intermittent switching off and on. The heater turns off automatically when the flue pipe surpasses 149 degrees Fahrenheit. Navien NPE-240A2 Pump Noise. : r/Plumbing - reddit If yes, clean them. This happens when you have a huge heater and lower gas output. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. First, place a thick rubber between the pump and anything it will be mounted on. All done in software. The process to take apart the fitting which holds the flow sensor to "blow" it out clean is arduous, requiring drainage of the system etc., and has not solved the problem. It sounds awful and not like any other recirculating pump I've ever heard. Return this item for free. The timer has control over when the pump is working continuously. Why Does My RV Carbon Monoxide Detector Keep Going Off? 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. Then replace the heater cover and turn the gas or power back on. And thats a wrap! For a better experience, please enable JavaScript in your browser before proceeding. This time of year, we dont need to have instant hot water circulating so we turned off the pump. Contents show This is done every time you close the faucet. What Parts Are In The Hot Water Circulation Pump Kits? My navien furance is producing hot water but not circulating (1000-3000+ Sq Ft Homes), Thermostat Says Heat On But No Heat? Legal Disclosure:Lildutchuncle.com provides and shares information on plumbing, heating & air quality, home improvement, and other DIY projects. If required, replace the thermistor. DC Wire Gauge Calculator: What Gauge Wire (12V, 24V, 48V)? To create an energy-efficient full recirculation system, your pump has to come with these two efficiency optimizing parts. 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. A hot water recirculation pump can be sized for a given system using the following formulas: Water flow qc = /T x 4200 Save my name, email, and website in this browser for the next time I comment. We want to reduce waste in using water given our well situation. Here are some of the leading causes of cold water production; Which means there isnt enough time for the water to heat up. Here we will cover all the important parts of hot water recirculations pumps, including: You will get an overall look at how you can use increased water pressure by a circulation pump for almost instantaneous hot water access. As an Amazon Associate we earn from qualifying purchases. A hot water recirculation pump can be sized for a given system using the following formulas: Water flow qc = /T x 4200 Second, you can use a flex connector to isolate the pump. NaviCirc Recirculation Valve | Navien I am guessing that he only returned the HOT line, hence the delayed time in "INSTANT HOT", as the Naviens are sold as well as there 96% efficiency!! Also, check if the electrical cord is grounded correctly or not. Make sure to follow our instructions properly for the right application. I got a Navien NPE 240A2 installed in my home with dedicated recirculating line (hopefully I got the lingo right!) Lets look at the individual parts that make up the recirculation pump for hot water: If you want to install a recirculation pump, you start by getting the whole recirculating pump kit. NPE-A2 Series | Navien A loose part causing unnecessary vibrations, Vacuum in the water lines causing vibrations, A dirty flow sensor leading to gas flow interference and producing weird noises. While you may have a general understanding of the listed electrical issue above, you should not attempt to handle any electrical work unless you are a licensed electrician. Navien Flow Sensor. 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. 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 Both of those spots are problematic though. You can crack open the manual for your tankless heater and check if it comes with that option. 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. Turn off the unit and check the valve's wiring and condition. It means that there is an issue with the air pressure sensor. Then re-insert the filter and screw it back in place. My pipes arent big enough 2. Press the reset button to reset your device. Unscrew the plug cover with a suitable screwdriver to remove it. Heres the thing: Both cold and hot water need to be supplied using the same pipe. Lets outline them here: To determine if installing a hot water recirculation pump makes sense for your situation, we have to check the pros and cons. Its not exactly normal. 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. Ensure you mount the pump securely. Therefore most homeowners try to cut down costs wherever possible, bypassing the recommended installation procedure. Is there a way to tell if the cold pipe is circulatory/return line or cold water from the mains? Similarly, if the return from the loops is mixing with the boiler loop system and cooling off the water before it gets sent to the recirculation pump, you will face this problem. This comprehensive guide helps to make the operation and repair of your heater easier. It is affordable and can easily fix your problem. This extra pipe is installed parallel to conventional piping. You can tell because the cold supply line is connected to the circulating return. Why Its Important To Turn Off The Water Recirculating Pump? Only 13 left in stock - order soon. 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. Is there the same solution for NR240A? Check to see if the warranty is still valid and contact the manufacturer. Parts that will actually be used depend on what kind of hot water recirculation pump you have. In his spare time, Oscar loves tinkering with electronics. Weve tried to include every concern you might have regarding turning off the water recirculating pump. So, get 2 braided ss flex connectors and install them on the inlet and the outlet of the pump. Any thoughts on that? If enabled you would find that your hot water is ready to go almost anytime you need it, without a long wait. What is more, you can, by these estimates, reduce the future water bill considerably and actually profit nicely just by not needlessly waiting for water when youre waiting for the hot water to kick in. Question: How much does it cost to buy a water recirculating pump? Then, read the manual on Navien tankless water heater how to reset. The Navien is smart enough to stop recirculation when it recognises hot water has made the entire loop. If your system is re-circed as close as possible to the fixtures (ask yourself do I have two hot waterlines for each fixture?) Im interested in information on a tankless water heater with a built in recirculating pump. Navien ComfortFlow is the first and only system that incorporates a built-in insulated buffer tank and recirculation pump. rev2023.3.3.43278. 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.