Unfortunately, the heat exchanger cannot be fixed and has to be replaced. Tankless Water Heater Wire Size Calculator: What Gauge Wire (AWG)? Way too many variables to even begin to diagnose online IMO. (Cost Calculations), BTU/h To Horsepower Calculator + BTU/h To HP Chart (To 72,000 BTU/h), Horsepower To BTU/Min: Convert HP To BTU Per Minute (Calc + Chart), HP To BTU/hr: Horsepower To BTU For A/C (Calculator + Chart). Check to see if the water valves are open. Set the pump in the bucket and plug it in. Examine and clean the filter in a cold water inlet. It means there is some issue with the OT-remote controllers operation. 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. = 4.5 x CFM x h (std. 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. It does save you water but it also costs you a bit of electricity. In compliance with California's . Here are four problems with these pump systems that you should be aware of. Navien NaviCirc Recirculation Valve Description How it works Specifications Dimensions Do the plumbers explanations make any sense at all or does it sound like BS? Page 12 Turn off and discontinue use of the water heater if any of the vent . 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? I would appreciate any help and insight you can offer. and our Normally uncontrolled pumps are used as the flow variation is relatively small. 2. So, saving water is the main reason for calling a recirculation pump eco-friendly. Turn the unit off. Will a Water-Saving Recirculation Pump Save Me Money? - Treehugger Recirculation pump | Grundfos That installation is incorrect. Thats all for today. Can you turn it off in a tankless that has it built in? If you have come back from a vacation, first turn on the main water valve. I recommend you disassemble the recirculation pump from the unit and inspect it carefully for foreign materials. Rather than using the hard wired door bell style push button that comes with the kit, I bought this remote control unit (. Remove the filter from the plastic assembly and clean it with a toothbrush, and clean running water. For example, you may damp it into a bathtub, pushing the water through the isolation side on hot. Thanks for contributing an answer to Home Improvement Stack Exchange! Note: Remember to turn off power to the heater before replacing the gasket. Get in touch with Navien technical support or a professional heater repairman. To change the water temperature; Check this too: Richmond Water Heater How to & Troubleshooting Guide. Correcting Navien Tankless Hot Water Heater Installation JavaScript is disabled. Close the isolation valves to the cold-supply and recirculation lines. Unscrew the plug cover with a suitable screwdriver to remove it. I have a tankless water heater with an external recirculating pump at the heater and a crossover valve under the kitchen sink. We and our partners use cookies to Store and/or access information on a device. Change the thermistor if needed. Check the thermistors condition along with pump wiring connectors. (+ Installation Costs), How Many Amps Does A Tankless Water Heater Use? You can crack open the manual for your tankless heater and check if it comes with that option. Navien NPE-240s with external recirculating pump. - JustAnswer Ensure that all hot water faucets are closed, and ensure that the internal circulator and any external circulating pumps are off. Additionally, you can install a 5-micron filter in the water inlet right before the heater to remove impurities from the water. Make sure to follow the required instructions before and after you've turned it off for your safety. 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. The water heater is set to 120 F (49 C) by default. 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? 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. Or invest in a larger water heater. Low gas supply which prevents proper heating of water, Damaged flow sensor preventing proper supply of gas to the heater. When attempting a flush of the system, I shut off the hot and cold valves that lead into the heater. This error informs you there is something wrong while you reset the unit. 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? It provides information about the problem with the fan motor. Where is the 2 internal drain valve in Navien 240a tankless water heater (damaged needs replacement), Shower gradually cools, gets hotter when sink is on. For example, if you get the tees backward, the recirculation pump will not function properly. Troubleshooting Navien NPE-240A Internal Recirculation Pump - YouTube 0:00 / 4:21 Troubleshooting Navien NPE-240A Internal Recirculation Pump RCGooner2002 240 subscribers Subscribe. From the valve, try to loosen up the cap to remove air from the system. To calculate the size of the heater, you will need to add up the amount of water required at a particular time. Theoretically Correct vs Practical Notation. (1000-3000+ Sq Ft Homes), Thermostat Says Heat On But No Heat? The cold water pipe coming from the wall goes into the domestic water inlet on the tankless heater, as it should. If the problem does not get resolved, replace the motherboard or control board or hire a professional t do it. Once the display stops flashing, the temperature setting is stored. Obviously, everybody loves immediate hot water from their faucets but this luxury can be quite expensive. Purchasing a timer will also fix the problem. 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. Categories Home Improvement, Patio, Lawn & Garden, Plumbing, Tools, Water Valve Handle Broke Off? Turn off the unit and check the valves wiring and condition. Foreign materials like small pebbles may get into the recirculation pump. For a better experience, please enable JavaScript in your browser before proceeding. Because a water recirculating pump provides us instant hot water. If a hot water faucet is open, you can adjust the temperature only from 98-110 F (37-43 C). A recirculation system is a hot water line that runs throughout the house and returns back to the water heater. Here is the list of all the parts you need to install a recirculation pump. The only problem you have is there is no check valves in place check valves or like stop signs that direct traffic check valves, direct to flow of water. This item: Navien 30010780B Circulation Pump. And the heater has been set to recirculation mode. It is an indication that your warm water outlet thermistor has some problems. 14 Culprits To Check For Now, MMBTU To MMSCFD Calculator For Natural Gas + Chart, 8 Best Infrared Heaters For Indoors, Patios, Garages (With ECO Thermostats), AGM Battery Voltage Charts: 12V, 24V Deep Cycle Battery Voltage, Lead-Acid Battery Voltage Chart For 6V, 12V, 24V, 48V Batteries, Natural Gas MMSCFD To MMBTU/Day Calculator + Chart. However, many first-time and beginner road travelers and RV How to Connect a Generator to Your Tiny House Without a Transfer Switch. This depends on how long you leave it on and how often you use it. 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 House was built in late 1990s and is 2 story, built on a slab foundation. Dont hesitate to switch the tees around if you get them backward. Quick summary on costs: Recirculating a pump is certainly useful if you want hot water quickly. Another suggestion I can give you is to maintain and service your Navien water heater according to the manual. In his spare time, Oscar loves tinkering with electronics. Well tackle the installation and running costs of a circulating pump in full near the end. Navien ComfortFlow is the first and only system that incorporates a built-in insulated buffer tank and recirculation pump. Remove and clean the cold air intake filter. I used a razor and carefully pried each side of the RM11 open to reach the programming switch. There are special tankless water heater recirculation pumps for Navien, Rinnai, and Rheem units; we will cover them all. However, if it generates annoying or buzzing noise, there is something wrong with the system. If enabled you would find that your hot water is ready to go almost anytime you need it, without a long wait. Navien 240A2 tankless help : r/Plumbing - reddit Asking for help, clarification, or responding to other answers. Call Navien and explain if yours is older. There are filters that prevent the sediment from entering the water flow. Ensure you mount the pump securely. link to Why Does My RV Carbon Monoxide Detector Keep Going Off? Find products from Grundfos related to this subject. 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. Recirculation Settings by pressing down the OK button. It has a timer that turns on the pump at regular intervals, mostly during peak usage times. If it does, you could trigger the operation to save money whenever your system detected 'away' or however you've got it programmed. We might be able to do something about it. Reconnect the power supply to the water heater. Works great and saves the copper pipes. 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. This extra pipe is installed parallel to conventional piping. Hot Water Recirculating Pump: What You Should Know - Best San Diego 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. It is located on the lowest corner opposite the on and off button. How can this new ban on drag possibly be considered constitutional? It looks like you're using an ad blocker. FREE Returns . Allow the vinegar to circulate through the heater for a minimum of one hour (longer if the pump runs at less than four gallons per minute). Fits These Models 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. Recirculate temp in is 67, temp out when just recirculating is 67. 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. There is something wrong with limit control. You need to run white vinegar through the system, to descale the water heater. Why Does My Stiebel Eltron Tempra High-limit Switch Keep Tripping. What effect does this have on gas usage for instant hot water? How to Troubleshoot a Circulator Pump Not Working | Hunker Do you want to know the details? Open the pressure relief valve. The cold water pipe coming from the wall goes into the domestic water inlet on the tankless heater, as it should. It usually occurs due to an open or shorted sensor. Is there a way to tell if the cold pipe is circulatory/return line or cold water from the mains? Also the unit needs to be set to utilize the recirculation feature. You will not get hot water instantly. Obviously, you might be wondering: If the recirculation pump loop is running continuously, youre probably expanding too much electricity just to get hot water faster. When you operated the hot water tap the last time you needed it, the water shuts off as soon as you turn off the tap. Just one Navien water heater manual for all NPE-A and NPE-S units. (With Water Savings Analysis), Note On Tankless Water Heater Hot Water Recirculation Pumps (Double Trouble), How Much Electricity Does A Tankless Water Heater Use? I added an additional remote for a total of 3. It sounds awful and not like any other recirculating pump I've ever heard. On the other hand, if you find no foreign stuff, ensure you purge the air out of the system. Press the Power button on the front panel to turn on the water heater. So, ensure you purge the air out of the recirculation pump to operate the unit quietly. Advantages and disadvantages of hot water circulation pumps. 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. Plug n play (after removing front panel to access the plug). Thats why most homeowners prefer installing the recirculation pump without the extra pipe. 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. Press the M (menu) button on the front panel and choose the 1. After draining a few hot water tanks over the years, removing sediment, will the cold water now possibly have some sediment and/or taste issues. How Much Does 500 Watts Cost Per Hour? The electric recirculation pump uses this other pipe to pump the hot water back into the boiler or water heater. However, the unit comes equipped with a standard 120V appliance cord and operates between 200 and 300 watts. Learn more about Stack Overflow the company, and our products. Locate the reset button on the heaters front control panel. Reassemble the heater and turn on the hot and cold water valves. Some sort of noise out of your Navien recirculation pump is normal. He has a good standing reputation for superior skills in heating, air conditioning, hot water tanks, and indoor air quality systems. You have to inspect the sensors connectors to confirm they are not wet and fixed correctly. they have an accessory called the HotButton (PZZZ-00046). Make sure the major electrical cord is grounded correctly. What disadvantages, beside cost???? The pump will cost you $200 to install, $5.50-$32 to operate, will waste $160-$400 per year and will save you $4-$50 on your water bill. 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!! 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. 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. Navien Flow Sensor. If you fail to stop the noise after trying all the steps I mentioned, I bet there is a complex problem with the unit. Examine and confirm the pressure sensor and wiring are in good condition. The upfront cost is a major deterrent when deciding if it makes sense to install a circulation pump or not. Is the plumbers reasoning valid here? 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). That is a premium service however. By installing a hot water circulation pump, you will have a hot shower right away. A hot water recirculation pump can be sized for a given system using the following formulas: Water flow qc = /T x 4200 Continue reading below Our Video of the Day 1. It could be open or shorted. Therefore most homeowners try to cut down costs wherever possible, bypassing the recommended installation procedure. Also, as I'm taking a closer look at it, I'm concerned that some key things may be amiss. Navien 30010780B Circulation Pump - amazon.com Having a tankless water heater is an energy-efficient way of getting hot water. Turning off your water recirculating pump reduces damage. First, you need to consider Things to consider when sizing the busiest usage period or peak time.