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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? (State-By-State Chart), How To Convert Therms To kWh? There are no error codes showing. 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. When the heat exchanger starts to crack, it creates a gap that can escape toxic exhaust gasses. If necessary, replace them all. I have alos checked my HeatBox settings to ensure the temp is set high enough for my domestic supply (set to around 120 degrees). Not sure I am understanding. If any of them are loose or disconnected, your circulator pump won't work. Navien ComfortFlow is the first and only system that incorporates a built-in insulated buffer tank and recirculation pump. An example of data being processed may be a unique identifier stored in a cookie. Carbon monoxide (CO) is a tasteless, colorless, odorless, and highly poisonous gas which can be deadly to humans in high concentrations. Well tackle the installation and running costs of a circulating pump in full near the end. It provides information about the problem with the fan motor. Stack Exchange network consists of 181 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. In fact, with a tankless water heater, you face double trouble (thats why youre not getting hot water fast): Because we need to wait longer for hot water in the case of tankless water heaters vs. traditional water heaters, it makes sense to minimize that time in tankless heaters even more. There are several ways to do it. Average 1-6 Person Home kWh Usage, Gas Vs Electric Water Heater Monthly Cost Comparison (State-By-State), Water Heating Costs For 1,2,3,4,5,6 Family Homes (State-By-State Analysis), Electric Water Heating Cost, kWh Usage Per Month (State-By-State RECS Analysis), What Is W2 Wire On Thermostat? Let the vinegar cycle through the cold side for 45 minutes. Turns out, make sure you isolate the recirculation pump from the vibration. The water heater will not provide hot water instantly. Do you want to know the details? This propels the water to your faucet or shower much quicker. First, place a " thick rubber between the pump and anything it will be mounted on. Pump the white vinegar into the cold side, up through your water heater, and out the hot side. However, the plumber branched this off into the circulation water inlet. Then, you can change the tank thermistor if needed. Here is the final install. You dont have to install an additional pipe. What I imagined would happen is 3-4 seconds of cold and then super hot water that was just waiting for me from the recirculation. Turn off the unit and check the valve's wiring and condition. If required, replace the thermistor. Worst case is your plumber might have to call since they require them to maintain it. (42-167 Amps), How Much Propane Does A Tankless Water Heater Use? Thanks for contributing an answer to Home Improvement Stack Exchange! House generators are quite expensive. These are the 3 most often recommended brands for tankless water heaters with recirculation pumps. If the issue persists, contact your original installer or an NSS to service the sensor. If you are unsure of whether the recirculation pump was correctly installed, contact Navien technical center or the NSS agent who installed the heater. Your Navien Recirculation Pump will make a humming noise like a refrigerator if you dont bleed the air out of the recirculation system. The E615 tells you about the irregularity in input and memory. 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. Therefore, the total peak demand of hot water needed is the ideal size of the heater you should get. Without the need for extra piping, this type of hot water circulation pump system also comes at a much lower cost. I have a tankless water heater with an external recirculating pump at the heater and a crossover valve under the kitchen sink. Wash it under the water with a brush, let it dry, and then place it back. Make sure there are no loose connections. Does anyone know the logic behind how Navien controls their internal recirculation pump when it is circulating with an external loop? It tells you about the improper operation of the flow sensor. The average electric tankless water heater needs at least 120 amps to work. 2. I have the newest version pcb since I just bought the tankless. First, open and close the pressure relief valve, which is located near the units outlet. (+ Calculator), 5 Best Air Purifiers For Allergies In 2023 (+ H13 Medical-Grade HEPA Filters), Is A Tankless Water Heater Worth It? If enabled you would find that your hot water is ready to go almost anytime you need it, without a long wait. Water heaters think about water in temperature: If the inlet water temperature is 40F and the guy at the kitchen sink doesnt want his hands to freeze, I need to warm that water up to 55F. I broke down all the possible reasons that cause your Navien Recirculation Pump to produce a humming noise. After using this amount of time, hardware gets old and starts to malfunction. Place a bucket underneath it to catch any water that drains when you remove the filter. 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. To remedy the issue, consider increasing the gas supply to the heater. The major difference with hot water pumps in new homes is that you can install a full recirculation pump system (Type #1). The exhaust is overheating. Hello Sam, you can shut off the recirculating pump to the kitchen faucet. I kind of feel like he is trying to get away with something that wasnt installed properly but hopefully I am wrong. It tells you about the abnormality of the external tank thermistor. The main sign of motherboard or control board failure is intermittent switching off and on. Costs associated with hot water circulation pumps (parts + installation + DIY savings). 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. You May Forget to Purge The Recirculation Pump, 03. Why Does My Stiebel Eltron Tempra High-limit Switch Keep Tripping. 5.0 out of 5 stars 3 ratings. Navien NaviCirc Recirculation Valve Description How it works Specifications Dimensions Now, we have to check if these costs are balanced out by the water savings. Dont hesitate to switch the tees around if you get them backward. Check to see if the warranty is still valid and contact the manufacturer. 1. Thats why most homeowners prefer installing the recirculation pump without the extra pipe. So, hire a professional to deal with the issue. = heat loss from the circulation system [kW] Also, make sure you get the 1- pipe for the horizontal manifold, which will help even out the flow of the recirculators. I added an additional remote for a total of 3. Save my name, email, and website in this browser for the next time I comment. To understand this problem what I am talking about, you can watch this video: First off, I recommend you check the primary loop. if your water heater has 4 connections (CW in; HW out; condensate; gas) then the recirculation occurs within the water heater - IMO don't see the benefit in this setup as the water in the HW distribution system doesn't see flow . You can change the cold water inlet thermistor if necessary. How do hot water recirculation pumps work to get hot water fast? Plug n play (after removing front panel to access the plug). qc = the circulating water flow [m3/s] How To Turn Off A Water Recirculating Pump? This error informs you there is something wrong while you reset the unit. 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? For most existing homeowners, integrating a recirculating home pump comfort system on top of the existing piping makes much more sense: Heres why this is the most popular type of hot water recirculating pump in homes: You use the existing water pipe alone. The cold water inlet one thermistor is defective. We do all the time-consuming research and testing for you. I think it's 100F. Press question mark to learn the rest of the keyboard shortcuts. The circulation return needs to come from a loop at an end of the hot supply line. Actually the only real issue is the lack of isolation valve on the recirculation connection, resulting in the constant water supply to the water heater. You need a check valve on the cold inlet 3/4 pipe also from the looks of the picture, you do not have a true designated recirculation line from your furnace fixture. We were advised of this upon installation. Do we keep the flames on after cooking? Unscrew the plug cover with a suitable screwdriver to remove it. The pump saves this cold water and recirculates it in the hot water. These processes are so easy that you can even install a water recirculating pump by yourself! Older Navien heater models are prone to flow sensor issues. Make sure to follow the instructions before and after you turn off the pump. Brand: Navien. Make sure the exhaust pipe is not obstructed. Is there the same solution for NR240A? 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. This issue is more common in older heater models. Below, I will break down everything to stop the buzzing noise. Working well so far. Take care! Examine and wash the intake air filter underneath running water using a toothbrush. A hot water recirculating pump will save you money, especially if you have a larger family. It will make your water recirculating pump much smarter. First, find the control panel on the front of the unit. A place for plumbing advice and help. An open or short thermistor can be the root cause of this problem. Yes, you can turn off your hot water recirculating pump. This may require chasing the supply lines. But, yes, I understand why it seems feasible for the sediment to eventually enter the water flow and cause the change in taste of water. You can isolate the pump from the vibration in two ways. This depends on how long you leave it on and how often you use it. So, keep reading till the end. Disconnect the power supply to the water heater. Use your pump when you want to use it. Here are some simple instructions on how to turn on your Navien tankless water heater. Now, that comes to the question, can I turn off my hot water recirculating pump? It is caused by an open or shorted air pressure sensor. . 10.6 Maintenance 10.7.3 NPE-180A/240A Pump P-Q Curve The Navien NPE-180A and NPE-240A water heaters that are used . The 3/4-inch pipe thread connectors are used to connect the pump to your existing pipes. Its clearly not always running as I can see it says standby on the display most of the time. Is there a check valve? 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. How? Remove the intake filter and properly wash it using a brush beneath running water. Confirm the thermistor and wiring is in good condition. What disadvantages, beside cost???? However, whenever I turn on the cold water at the kitchen sink for a few seconds the tankless unit starts to run (heat water) even though I dont want heated water.