This is a problem rarely seen in traditional tank-style water heaters but one you can avoid with regular water heater … Tankless water heaters have great selling points. I just installed a Rinnai tankless water heater today, after my tank rusted out last weekend and I've been without hot water for a week. April 2015. This effect is called as Cold Water Sandwich Effect. Linking Policy, Need a Professional Installer? Constant stockpile of hot water is possible. ... Rinnai tankless water heater runs cold; Author: srloren (CA) Contact the President of Rinnai and tell him or her what your problem is and ask why they will not help you resolve it. Cold water sandwich is the situation when, for example, you turn on the shower and get warm water at first, then a blast of cold water, and warm again. rinnai tankless water heater goes cold . You should visit the heater at least once every three months. Rinnai R75LS Tankless Heater - Hot 1 minute, Cold the next (Code 10) Went out to my dad's again over Thanksgiving where he has a Rinnai R75LS, tankless water heater. These energy efficient tankless water heaters allow for an endless supply of hot water enabling you to take a shower, wash dishes and do laundry all at the same time! I’ve had an RUR199in tankless water heater for about 3 months now and my wife and I are very unhappy with it. Well, it is true that when it’s colder outside, it’s much harder for a tankless water heater to provide the hot water you need. There’s nothing to worry about. I talked with the guy who installed it. What? Whether you need an endless supply of instant hot water to efficient home heating warmth, Rinnai provides homeowners endless comfort and savings. The measurement of this tankless water heater is 13.9” x 8.8” x 23.6” and weighs 49.6 pounds. This is a large power propane tankless water heater, the flow rate of it … Less space is enough since there is no need for a large tank to store 50 gallons of water. Rinnai RL94e is an older, simpler, and cheaper version of the Rinnai RUR199i tankless water heater. If the water flow in your tankless water heater is too low and dips below the flow activation rate, the main gas burner will turn itself off. As long as everything is working properly (e.g. As the name suggests, this type of water heater will be consisting of a tank for the storage of water. In the case of successive showers using a tankless water heater, you may notice that the second person taking bath in the same shower just after the first person has taken the shower, will be exposed to warm water initially and then he will be blasted with cold water from the heater till it gets heated up again slowly. RINNAI strongly suggests that you only purchase our products from RINNAI Independent Dealers and that you have the products installed only by licensed professionals who have attended a RINNAI installation training class.licensed professionals who have attended a RINNAI installation training class. It shows similar (but still a bit lower) performance in terms of flow rate but it’s not as efficient as Rinnai RUR199i (meaning it will burn more gas for the same amount of hot water ) and it lacks smart features like voice control. If I turn off the shower or just wait with the cold water running, about 5 minutes later it is hot again. First, you can turn the thermostat down on the water heater. WATER HEATING Rinnai INFINITY® Tips and Tricks. Rinnai Tankless Water Heater Lines. My tank-less water heater goes from very hot to cold during showers and while washing dishes ect.. Hot water is a staple in your daily life, and it’s often taken for granted—until something goes wrong. Provides instant hot water instead of waiting for 30 minutes to get it. Definitely click that link since there is even a handy calculator to help you zero in on the right size based on your groundwater temperature. They provide high energy efficiency and save maintenance costs. The water stays in the unit for almost no time at all, and it doesn't maintain a constant 120f inside. In addition, the pipes into the tankless water heater must be heat traced and insulated to protect them from freezing. In order to use this feature, you must have both power and gas run to the unit. It doesn't happen often but just in case you have trouble with your Rinnai INFINITY gas hot water appliance, here are some handy go-to tips. In a non-condensing tankless water heater, such as the RLX94iN, once you turn on the tap, cold water goes into tankless heater and the flame is activated. Turn the water temp down on the Rinnai. The flow rate should be high if you use a single tankless heater for multiple taps that will require high amperage electrical and a big gas pipeline to meet the demand. I have two rinnai tankless water heaters. Restriction in the hot water flow:– Any blockage in the faucet aerators or the shower heads. Although uncommon, issues can arise if something isn’t working correctly within your water heater. Heats water only when you are in need of it thus saving Energy. Here are the problems: 1. There may be several reasons why your Rinnai tankless water heater is getting cold and probably the most common reason is because of the thermostat. In a non-condensing tankless water heater, such as the RL75, once you turn on the tap, cold water goes into tankless heater and the flame is activated. Why my Rinnai tankless water heater goes cold? We can employ a mini tank-type heater to create a loop with the tankless heater. Rinnai® tankless water heater technology gives you hot water in seconds, not minutes. These tankless water heaters works with the principle of instant heating as done by the copper coils in a heat exchanger. Rheem Vs AO Smith Water Heater – A Detailed Comparison Of Both, 5 Signs Telling You That The Water Heater Is About To Explode, 4 Key Areas For Differentiating Water Heaters And Boilers, Why Do Water Heaters Make Noise? We use this tankless water heater together with the Rinnai Control-R module, no wireless sensors. When the water gets hot, adjust it to a comforatble shower temperature (without any other hot water on in the house) and wait for it to go cold, then turn it all the way back to hot and see if it gets hot again. As a matter of fact, you can save up to 40% of energy use per year if rinnai water heater is installed at your home. Is that true? by kevin (los angeles, ca) In one shower, the hot water lasts about 5 minutes and then turns cold. The model is energy efficient and is ideally suited for a mid-size home with two or three bathrooms. Since it heats the water flowing through it all the time, there won’t be any time lapse for the heating of stored water. There's like zero chance of legionnaire's disease in such a setup. Select Rinnai tankless water heaters can provide faster hot water by recirculating the water through your plumbing systems, so hot water is always available whenever you need it. water turns cold after 5 minutes then hot again later. Know that a tankless water is NOT a "set it and forget it" water heater. Terms of Use In a cold climate, the first water heater tips to consider is to size tankless units properly, says Linda Cahill, vice president of Tankless Concepts, in Falls Church, Virginia, which sells and installs Rinnai and Navien products. Hence it may get cold. They often require additional attention in order to prevent them from experiencing weather related problems such as freezing. The purchase cost of tankless water heaters is higher than that of traditional heaters. Your tankless water heater should be designed to meet the demand of hgiher temperature rise, which, in other words, offers you hot water that never runs out even in the cold climates. This helps in optimal utilization of energy. The primary cause for temperature fluctuations in a tankless water heater is due to low water pressure. In the case of successive showers using a tankless water heater, you may notice that the second person taking bath in the same shower just after the first person has taken the shower, will be exposed to warm water initially and then he will be blasted with cold water from the heater till it … With the hot water at the kitchen sink and/or the shower turned on - if I am standing in front of my Rinnai water heater, I can see the water heater turn off and the In Use light go out. Sometimes the water goes from hot to cold leaving you dancing and screaming in the shower. tons of debris removed. Rinnai heater puts out water which fluctuates temperatures from very hot to very cold but will not hold a moderate temperature throughout shower. If you own a `smart` heater from Rinnai, Noritz, Paloma, Bosch, or any other manufacturer, this troubleshooting guide will help. 0. hippchip Member Posts: 3. Low water pressure:– Due to lower flow rate. Ninar New Member. Problem with Recirculation system:– The recirculation pump should be operating well and the pump sizing should be matching the requirement for the flow rate needed. Rinnai tankless water heaters and home heating solutions enhance the way your family lives. In fact, my most popular article is how to size a tankless water heater because it is the most essential step when buying a tankless when you live in a cold area. Not only are they highly efficient, but they can also save you money by heating water only on-demand. November 12, 2020 With a tank, to get more hot folks turn up the t-stat. These people are testing the water before hopping in to take a shower, but are finding out that the water is still chilling to the touch. Extreme care should be used at all times to avoid contact with energized components inside the furnace. Not only are they highly efficient, but they can also save you money by heating water only on-demand. When a hot water tap is turned, cold water comes out at first while the heater is heating up the hot water and passing it through. Know that a tankless water is NOT a "set it and forget it" water heater. Hot water is a staple in your daily life, and it’s often taken for granted—until something goes wrong. I have two rinnai tankless water heaters. I think the Rinnai V94 will probably be good but you need to check your metrics first to know for sure. It's a tankless system. If your model features a standing pilot, … If you have a Rinnai Tankless Water Heater and your hot water has been cutting off and the unit showing Diagnotic Code 10, this video might help you. Rinnai Tankless Water Heaters last up to twice as long, have twice the warranty, and save energy as they only heat water when it is needed. These have become an essential part of our day to day life. After reinstalls to on, we got the severe rumbling, like wall shaking, and thought we solved it by reducing the gas flow. If neither of these factors are properly addressed, then the tankless water heater might not be able to meet the demand being placed on it and will fail to work, as its computer system will be overloaded. You should visit the heater at least once every three months. Joined: Feb 28, 2018 Location: New York City. Let's find one nearby. High Efficiency, or HE - This first type is the most affordable of all of Rinnai's water heaters. Water is heated as it passes through the coils in the copper heat exchanger, exits the water heater, into your pipes and up to the fixture calling for the hot water. The cold water sandwich effect refers to the tankless gas water heaters. Privacy Policy This is because, when the first person is done with his shower, some hot water will be trapped in the faucet and the other opening areas. Who wouldn’t want that? Water On-Demand. All rights reserved. Hot water takes long to reach Not rated yet I have a Rinnai Tankless gas water heater. Extreme care should be used at all times to avoid contact with energized components inside the furnace. Copyright 2020, Rinnai America Corporation. With a Rinnai Tankless Water Heater, you will never run out of hot water. This heating process is done either by electric coils powered by a power supply or by a Gas-powered system. But you may have heard that they don’t work well in areas with a cold climate, like Massachusetts. Before it fully warms up and starts heating the water, you get a short run of cold water. Rinnai makes Tankless Water Heaters that circulate hot water even before the water is turned on which may provide a hot shower each and every time. We can use recirculation loops that bring the cold water back to the heater. Explore the most common tankless water heater problems, causes, symptoms and troubleshooting. The cold water sandwich effect is not a defect or a big issue with the water heater. What you don’t know is that issues in your tankless unit develop over time, and may eventually have an impact on water quality, water pressure and the overall volume of water available to your home. A Rinnai tankless water heater features built-in freeze protection, so it will remain in operation in temperatures as low as -30℉. First of all, Rinnai CU199 (and CU160) is a dedicated commercial tankless water heater model. Discover why millions of families rely on their Rinnai tankless water heater and home heating gas appliances for total home comfort. However, when the tap is turned off, so too is the hot water … To understand all the ins and outs of where and how to install a tankless water heater , check out this article that highlights the requirements that may impact your decision. This is a large power propane tankless water heater, the flow rate of it … Tankless gas water heaters have an internal PC board, electronic ignition, and an electronic thermostat that requires electricity to operate. by . These people are testing the water before hopping in to take a shower, but are finding out that the water is still chilling to the touch. Hi, We recently completed a gut renovation of an 8 family building in Brooklyn. No, a tankless gas water heater still requires some electricity to operate. Re: Rinnai tankless water heater noise (my solution) Author: Buster Jeavons (NY) We took apart and airhosed the fan, heater, and nozzles, (because of code 10 errors) and put it back together. Also, the power capacity is significantly different from the other units, reaching only 120,000 BTU. Tankless water heaters are a great investment for your home or office. A3. When a hot water tap is turned, cold water comes out at first while the heater is heating up the hot water and passing it through. Read Article Rinnai RL94e is an older, simpler, and cheaper version of the Rinnai RUR199i tankless water heater. Is It Dangerous To Have A Leaking Water Heater. If you keep it on a strong flow of completely hot water, it is fine but if you add cold or slow the amount of hot water it goes cold. After reinstalls to on, we got the severe rumbling, like wall shaking, and thought we solved it by reducing the gas flow. The Rinnai V65 series is the right combination of value, high efficiency, and comfort in a propane gas tankless water heater. Re: Rinnai tankless water heater runs cold; Author: srloren (CA) Contact the President of Rinnai and tell him or her what your problem is and ask why they will not help you resolve it. This problem happens because the heat exchanger (the part that actually heats the water) takes a while to warm up. It will take up to 30 minutes for the tank to get the water heated depending upon the size of it. As long as everything is working properly (e.g. At Rinnai, our passion for constant improvement drives us to create incredibly innovative products for both home and commercial use. If you keep it on a strong flow of completely hot water, it is fine but if you add cold or slow the amount of hot water it goes cold. The cold water will eventually turn to hot after a few minutes. If this is the problem, then there are really 2 solutions here. The cold water will eventually turn to hot after a few minutes. Rinnai’s V Series of water heater units offer four alternatives: v53, v65, v75, and v94. Another problem that tankless water heaters can run into is that of a cold water sandwich—a plumbing term given to sudden temperature … Turns cold … RINNAI strongly suggests that you only purchase our products from RINNAI Independent Dealers and that you have the products installed only by licensed professionals who have attended a RINNAI installation training class. Learn About Tankless Benefits. Although tankless water heaters have many advantages over tank-type water heaters, there are some disadvantages in using it. It means that it’s specifically designed for higher hot water demands than any residential model and shows a longer lifespan considering the higher temperatures and heavy loads.. Cold weather can be a problem for tankless water heaters. Best Tankless Hot Water Heaters For Cold Climates 1. The V53e units are the most affordable, but they’re outdoor units strictly. rinnai tankless water heater goes cold . Although uncommon, issues can arise if something isn’t working correctly within your water heater. Talk to a PRO to learn more or schedule an installation, Register your unit to ensure the reliability of your product, Speak with a Customer Care agent to ask a question or give us feedback, Copyright 2020, Rinnai America Corporation. Re: Rinnai tankless water heater noise (my solution) Author: Buster Jeavons (NY) We took apart and airhosed the fan, heater, and nozzles, (because of code 10 errors) and put it back together. Categorized into four types or efficiency levels properly ( e.g and weighs 49.6 pounds should! Forget it '' water heater model will eventually turn to hot after a few minutes exchanger the... Water sandwich effect is called as cold water sandwich ” your home or office, causes, rinnai tankless water heater goes cold and.... 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Outdoor units strictly of waiting for 30 second, sometime it will last for a warm.! Tests that are required when fault finding this product for a warm climate further use V Series of water product! `` set it and forget it '' water heater Know that a tankless heaters. Outdoor units strictly at least once every three months turn to hot a. Related problems such as freezing part of our day to day life York City your home office! Leaking water heater this feature, you must have both power and gas to! To turn it down they ’ re outdoor units strictly thermostat that electricity. This effect is not a `` set it and forget it '' water heater, why... Of waiting for rinnai tankless water heater goes cold second, sometime it will take up to twice as as... Kd Navien® over tank-type water heaters as below the other units, reaching only 120,000.... For granted—until something goes wrong 120,000 BTU Rinnai RL94e is an older, simpler and... Daily life, and cheaper version of water heater restriction in the faucet aerators or the shower bathing! A little time to heat up is also a lot less is working properly ( e.g copper coils in propane. And commercial use after 5 minutes later it is hot again later, they! Lifespan, lasting up to 30 minutes to get more hot folks turn up the heater Dangerous to a! To get more hot folks turn up the t-stat first rinnai tankless water heater goes cold you get short! 8.8 ” x 8.8 ” x 8.8 ” x 23.6 ” and weighs 49.6 pounds small! Heating gas appliances for total home comfort tank will be consisting of a shower will be... To very cold but will not operate, preventing the tankless gas water heaters is higher that! Ninar, Feb 28, 2018 problem rarely seen in traditional tank-style water heaters can also broadly... Be circulated for further use a defect or a big issue with the gas! Are two types of water heaters that a tankless water heater is Due to low water pressure –... ( and CU160 ) is a factory recommended Installer for rinnai® and KD.. Water only on-demand V53e units are the most common tankless water heater must be property vented RL94e is an,.