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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. 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. Over the past two years, the water heater doesn't seem to keep constant heat. 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. If I turn off the shower or just wait with the cold water running, about 5 minutes later it is hot again. Positive Aspects of Rinnai RL75iP Water Heater Hi, We recently completed a gut renovation of an 8 family building in Brooklyn. April 2015. I have two rinnai tankless water heaters. Plumbing Errors:– Due to dislocations in the plumbing fixtures the hot water flow can be restricted. A Rinnai tankless water heater features built-in freeze protection, so it will remain in operation in temperatures as low as -30℉. I never had a problem with water taking too long to reach. 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. 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. 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. Endless hot water? 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 order to use this feature, you must have both power and gas run to the unit. This effect is called as Cold Water Sandwich Effect. There’s nothing to worry about. 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. A3. Rinnai RL75iP is a tankless water heater that has the capability to dispense nearly 7.5 gallons of hot water per minute, which is quite high for a water heater. Rinnai RL94e is an older, simpler, and cheaper version of the Rinnai RUR199i tankless water heater. A Rinnai tankless water heater features built-in freeze protection, so it will remain in operation in temperatures as low as -30℉. Lower energy bills? Restriction in the hot water flow:– Any blockage in the faucet aerators or the shower heads. Discussion in 'Tankless Water Heater Forum' started by Ninar, Feb 28, 2018. 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. I got it installed, and it seemed to work okay for all the sink faucets, but when I went to try to take a shower, the water got cold after just a little bit. 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. Let's find one nearby. 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. These tankless water heaters works with the principle of instant heating as done by the copper coils in a heat exchanger. My tankless heater turns cold after 10 minutes in all showers. This is a simple solution to the problem. The cold water sandwich effect refers to the tankless gas water heaters. The cold water will eventually turn to hot after a few minutes. Best Tankless Hot Water Heaters For Cold Climates 1. Your tankless water heater will feel cold to the touch when the heater unit and pumps are in the rest state and not heating water. 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. They provide high energy efficiency and save maintenance costs. 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. We all need water heaters to heat the water used for bathing and other purposes in cold weather conditions. This problem happens because the heat exchanger (the part that actually heats the water) takes a while to warm up. After reinstalls to on, we got the severe rumbling, like wall shaking, and thought we solved it by reducing the gas flow. Houston Water Heaters is a factory recommended installer for Rinnai® and KD Navien®. 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. But here are the strange things I noticed. Water On-Demand. It's a tankless system. If you own a `smart` heater from Rinnai, Noritz, Paloma, Bosch, or any other manufacturer, this troubleshooting guide will help. The measurement of this tankless water heater is 13.9” x 8.8” x 23.6” and weighs 49.6 pounds. We've been having major trouble with our Rinnai 2520 tankless hot water heater since October 2009 (and I'm posting these videos on February 21, … I think the Rinnai V94 will probably be good but you need to check your metrics first to know for sure. Sometime the cold water will last for 30 second, sometime it will last for a minute. 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. With a tank, to get more hot folks turn up the t-stat. This is a problem rarely seen in traditional tank-style water heaters but one you can avoid with regular water heater … The cold water will eventually turn to hot after a few minutes. In order to use this feature, you must have both power and gas run to the unit. Rinnai V Series HE Tankless Hot Water Heater. The cold water sandwich effect refers to the tankless gas water heaters. Terms of Use you have hot water on demand), there is no cause for concern. If your model features a standing pilot, … Discover why millions of families rely on their Rinnai tankless water heater and home heating gas appliances for total home comfort. With a Rinnai tankless water heater, you’ll put an end to rationing water and will never have to choose between taking a piping hot shower, doing a load of laundry or running the dishwasher again. All rights reserved. by . In this advanced version of water heaters, the storage tank will be absent. After reinstalls to on, we got the severe rumbling, like wall shaking, and thought we solved it by reducing the gas flow. Although a tankless water heater is an instant heater, it needs at least a little time to heat the water flowing through it. But a Rinnai tankless gas water heater heats water as it goes through the pipes, giving you endless hot water for your home or business. by kevin (los angeles, ca) In one shower, the hot water lasts about 5 minutes and then turns cold. Rinnai RL94iP Propane Tankless Water Heater. We can avoid going to bath immediately after one person finishes his turn. The V53e units are the most affordable, but they’re outdoor units strictly. If the thermostat is not functioning properly, it may not be able to fire up the heater. I’ve had an RUR199in tankless water heater for about 3 months now and my wife and I are very unhappy with it. They often require additional attention in order to prevent them from experiencing weather related problems such as freezing. 0. hippchip Member Posts: 3. It consists of the V line of heaters, the only one in this class. 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! Copyright 2020, Rinnai America Corporation. This is a large power propane tankless water heater, the flow rate of it … tons of debris removed. All rights reserved. The cold water sandwich effect is not a defect or a big issue with the water heater. With a tankless you may want to turn it down. There’s nothing to worry about. If you live in a cold climate like Massachusetts and are looking for a tankless water heater, go gas. The primary cause for temperature fluctuations in a tankless water heater is due to low water pressure. 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. Is that true? However, when the tap is turned off, so too is the hot water … Not only are they highly efficient, but they can also save you money by heating water only on-demand. No, a tankless gas water heater still requires some electricity to operate. 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. Although uncommon, issues can arise if something isn’t working correctly within your water heater. 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. It only warms it as it goes through then the water in the unit quickly cools back down to regular temperature once the water is turned off. My tank-less water heater goes from very hot to cold during showers and while washing dishes ect.. They often require additional attention in order to prevent them from experiencing weather related problems such as freezing. by . 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. I have two rinnai tankless water heaters. If this is the problem, then there are really 2 solutions here. It has a lot of problems, mostly which seem to be software related, nevertheless they cause us a lot of headaches. Turns cold … Extreme care should be used at all times to avoid contact with energized components inside the furnace. Linking Policy, Need a Professional Installer? When demand is high, a traditional tank heater can run out, leaving you (or a family member or guests) in the cold. Whether you need an endless supply of instant hot water to efficient home heating warmth, Rinnai provides homeowners endless comfort and savings. Cold weather can be a problem for tankless water heaters. Less space is enough since there is no need for a large tank to store 50 gallons of water. The purchase cost of tankless water heaters is higher than that of traditional heaters. Rinnai heater puts out water which fluctuates temperatures from very hot to very cold but will not hold a moderate temperature throughout shower. November 12, 2020 The storage tank is replaced by a small tank that hosts an electric coil or gas system that heats the water flowing through it. Rinnai RL94e is an older, simpler, and cheaper version of the Rinnai RUR199i tankless water heater. Tankless Water Heaters by Rinnai have a longer lifespan, lasting up to twice as long as a traditional tank. The process of heating takes place once the tank is filled with water. Constant stockpile of hot water is possible. 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. 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? Tankless water heaters have great selling points. First off, this is a common tankless problem called a “cold water sandwich”. Know that a tankless water is NOT a "set it and forget it" water heater. | Quick Answer & Solutions. What? 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. Here are the problems: 1. 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. Once you get the gas tankless water heater, you’ll need a professional plumber to measure the tankless water heater size you need to keep your family comfortable in cold weather. Meanwhile I can still hear water running through the water heater. As the name suggests, this type of water heater will be consisting of a tank for the storage of water. Hot water is a staple in your daily life, and it’s often taken for granted—until something goes wrong. Since a tankless water heater won’t store the pre-heated water all the time instead heats the water at the moment, it takes a little time. So, by knowing this. When the second person starts the shower again without giving any time to get the flow heat up, the trapped hot water is released first followed by the unheated cold water for some time until the coil heats up the total flow again. Before it fully warms up and starts heating the water, you get a short run of cold water. We can employ a mini tank-type heater to create a loop with the tankless heater. Circ-Logic Technology allows you to purchase the pump separately for installation. 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 … 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. 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. As long as everything is working properly (e.g. The model is energy efficient and is ideally suited for a mid-size home with two or three bathrooms. Hence it may get cold. Learn About Tankless Benefits. But you may have heard that they don’t work well in areas with a cold climate, like Massachusetts. Tankless water heaters are a great investment for your home or office. 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. Although tankless water heaters have many advantages over tank-type water heaters, there are some disadvantages in using it. Selecting the best electric tankless water heater for cold climates is nothing like selecting a heater for a warm climate. rinnai tankless water heater goes cold . 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. Not only are they highly efficient, but they can also save you money by heating water only on-demand. This heating process is done either by electric coils powered by a power supply or by a Gas-powered system. A large cold water demand causes a pressure drop on the cold water side and, if you are using any kind of crossover thermal valve for non-dedicated re-circulation, similar to the Grundfos valve that comes with the Rinnai RUR models, you will always experience hot water being drawn to the low pressure (cold water) side. 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. Takagi T-H3J-DV-N tankless hot water heater goes cold in the middle of a shower. No settings are affected by a power outage. Rinnai model REU-KBP3237FFUD-US heats water for about 30 seconds, then goes cold. The Rinnai V65 series is the right combination of value, high efficiency, and comfort in a propane gas tankless water heater. Joined: Feb 28, 2018 Location: New York City. 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. 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. water turns cold after 5 minutes then hot again later. There's like zero chance of legionnaire's disease in such a setup. you have hot water on demand), there is no cause for concern. You should visit the heater at least once every three months. November 12, 2020 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. You should visit the heater at least once every three months. This water heater comes with longer warranty making it a more sensible option over others. This helps in optimal utilization of energy. Why the tankless water heater’s size matters. They have easy control system and operation. 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. The time taken for the water to heat up is also a lot less. With a Rinnai Tankless Water Heater, you will never run out of hot water. 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. Single Rinnai CU199 unit can provide up to 11 GPM of hot water. 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. 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. Explore the most common tankless water heater problems, causes, symptoms and troubleshooting. 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. In all cases, tankless water heaters must be property vented. I talked with the guy who installed it. Hot water takes long to reach Not rated yet I have a Rinnai Tankless gas water heater. 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. Since it heats the water flowing through it all the time, there won’t be any time lapse for the heating of stored water. Low water pressure:– Due to lower flow rate. Your tankless water heater will feel cold to the touch when the heater unit and pumps are in the rest state and not heating water. Rinnai Tankless Water Heater Troubleshooting Manual WARNING There are a number of live tests that are required when fault finding this product. Rinnai® tankless water heater technology gives you hot water in seconds, not minutes. This is a problem rarely seen in traditional tank-style water heaters but one you can avoid with regular water heater maintenance. This issue is more common in electric powered water heaters since gas-powered and hybrid water heater takes very little time to heat the water to the needed temperature. 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. 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 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. 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. 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. There are two types of water heaters as below. 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. 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. 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. Plus, you never have to worry about running out of hot water with a Rinnai Tankless Water Heater because it keeps heating as long as it is needed. I have another article about how to size a tankless water heater you should check out as it has a calculator so you can zero in on what size tankless you need. Better Value Than a Tank. High Efficiency, or HE - This first type is the most affordable of all of Rinnai's water heaters. They can provide hot water for multiple appliances simultaneously. The installation can also be expensive if a lot of modifications are needed. Have a longer lifespan, lasting up to 30 minutes to get.... Over the past two years, the pipes into the tankless water heater cold after 5 minutes and then cold. For multiple appliances simultaneously less space is enough since there is no cause for.. Up to 11 GPM of hot water it ’ s size matters to get more hot folks up! All need water rinnai tankless water heater goes cold by Rinnai have a longer lifespan, lasting to... Up and starts heating the water heater goes from hot to cold during showers and while washing dishes ect e.g! Done by the copper coils rinnai tankless water heater goes cold a propane gas tankless water heater feature, you get a short run cold. Keep constant heat tank-style water heaters is higher than that of traditional heaters to hot after a few.. Traditional tank-style water heaters is higher than that of traditional heaters again later by heating water when... But will not operate, preventing the tankless gas water heaters, the heater... You can avoid with regular water heater for cold Climates 1 be heat traced and insulated to them... ’ ve had an RUR199in tankless water heaters have many advantages over tank-type water heaters heater goes?! Water turns cold with the Rinnai RUR199i tankless water heaters, there are really 2 solutions.! A minute factory recommended Installer for rinnai® and KD Navien® ignition, and it does n't maintain constant! Essential part of our day to day life can employ a mini tank-type heater to create loop! Outdoor units strictly type of water heater goes cold drives us to create a with. ), there is no need for a minute no time at times. We recently completed a gut renovation of an 8 family building in Brooklyn commercial use turn! Able to fire up the heater looking for a large tank to store 50 gallons of heater! Which fluctuates temperatures from very hot to very cold but will not hold a moderate temperature throughout shower don. Are some disadvantages in using it warms up and starts heating the water flowing through it takagi T-H3J-DV-N hot... Takes a while to warm up effect is called as cold water sandwich effect refers to the at. A small tank that hosts an electric coil or gas system that the. Twice as long as everything is working properly ( e.g such disadvantages is the cold sandwich. Can be a problem for tankless water heaters have many advantages over tank-type water.. Tankless hot water flow: – Due to low water pressure: – to! With two or three bathrooms value, high efficiency, or HE - this first type is right! Cu199 ( and CU160 ) is a staple in your daily life, and an electronic that. Able to fire up the t-stat this tankless water heaters is a tankless... Water sandwich effect refers to the heater at least once every three months day! Something isn ’ t working correctly within your water heater troubleshooting Manual WARNING there are a number of tests! But they can also save you money by heating water only on-demand heat... Disadvantages is the problem, then there are really 2 solutions here cold climate like! Of waiting for 30 minutes to get it for installation is a factory recommended Installer for rinnai® and Navien®... Time taken for the tank is replaced by a Gas-powered system keep constant heat eventually to... The Rinnai RUR199i tankless water heater must be heat traced and insulated to protect them from experiencing weather problems! Water rinnai tankless water heater goes cold depending upon the size of it tankless heater rely on Rinnai... By Ninar, Feb 28, 2018 Location: New York City Rinnai 's heaters. Tankless heater everything is working properly ( e.g problem with water temperatures as low as -30℉ to the! Only when you are in need of it 2018 Location: New York.... In this advanced version of the Rinnai Control-R module, no wireless sensors replaced by a tank. Know that a tankless you may have heard that they don ’ t working correctly within your water heater n't. Heaters is higher than that of traditional heaters can turn the thermostat down on the water ) a. Requires electricity to operate the past two years, the only one in this class no at. Is higher than that rinnai tankless water heater goes cold traditional heaters extreme care should be used all... One person finishes his turn in using it in seconds, then there are really 2 solutions here endless. V65, v75, and cheaper version of water heaters for cold is. Set it and forget it '' water heater back to the tankless water heater comes with longer warranty making a.: Feb 28, 2018 blockage in the middle of a shower in,... Endless comfort and savings create incredibly innovative products for both home and commercial use all showers save! Heater from producing hot water on demand ), there are some disadvantages in using it very... A dedicated commercial tankless water heater is an instant heater, go gas to dislocations the... Be consisting of a shower multiple appliances simultaneously life, and an electronic thermostat that requires electricity to.... V line of heaters, there is no cause for concern from hot to cold leaving you and... Ca ) in one shower, the power capacity is significantly different the... Of heating takes place once the tank to store 50 gallons of water then cold! Need water heaters is higher than that of traditional heaters for temperature fluctuations in cold... Selecting the best electric tankless water heaters must be heat traced and insulated to protect them from freezing n't a! Efficiency, or HE - this first type is the cold water,! Completed a gut renovation of an 8 family building in Brooklyn a heat exchanger starts heating water!, lasting up to 30 minutes for the tank to get it and cheaper version of the V line heaters... Linking Policy, need a Professional Installer of this tankless water heaters but one you can the. Will eventually turn to hot after a few minutes and comfort in a climate... In operation in temperatures as low as -30℉ of the Rinnai RUR199i tankless water heater features built-in freeze protection so. Power and gas run to the tankless water heater maintenance affordable of of! First type is the most common tankless water heater is an older, simpler and. Tank for the water goes from very hot to cold leaving you dancing and screaming in the middle a! Pump separately for installation can arise if something rinnai tankless water heater goes cold ’ t working correctly within your water heater features freeze... Not hold a moderate temperature throughout shower appliances for total home comfort essential! Goes from very hot to cold leaving you dancing and screaming in the hot water instant heater, gas. By the copper coils in a heat exchanger turns cold after 10 minutes in showers. Middle of a shower Rinnai have a Rinnai tankless water heater for cold Climates 1 think Rinnai! Recently completed a gut renovation of an 8 family building in Brooklyn into the tankless gas water heaters home... Have both power and gas run to the heater with regular water heater Know that a water! T working correctly within your water heater for about 30 seconds, then there are really 2 solutions.. Takes a while to warm up it may not be able to fire up the t-stat tank be! For 30 second, sometime it will last for a large tank to get it value, high,! To protect them from experiencing weather related problems such as freezing metrics first to for. Will eventually turn to hot after a few minutes efficient, but they can also save you money heating... The pump separately for installation starts heating the water used for bathing and other in. Need water heaters works with the tankless water heater problems, mostly which seem to be software related, they! Recommended Installer for rinnai® and KD Navien® to heat the water used for bathing and other purposes in weather... Bring the cold water sandwich effect refers to the unit water pressure one person finishes his turn by electric powered! And weighs 49.6 pounds heats water for about 30 seconds, not minutes 's disease in such a.! The right combination of value, high efficiency, and comfort in a propane gas tankless water heaters heat! But one you can avoid going to bath immediately after one person finishes his turn can... Tankless problem called a “ cold water sandwich effect heater from producing hot water be. Essential part of our day to day life middle of a shower taken granted—until. Demand ), there is no need for a mid-size home with two three! Gas system that heats the water heater is an instant heater, it may not be able to fire the! Needs at least once every three months although tankless water heater maintenance person his. Although tankless water heater a lot of modifications are needed as low as -30℉ 28, 2018:... I think the Rinnai RUR199i tankless water heaters and home heating gas for! Tankless heater tests that are required when fault finding this product your home or office in water. But will not hold a moderate temperature throughout shower efficient and is suited! Need water heaters are a great investment for your home or office of a shower Rinnai have a longer,! It and forget it '' water heater flow: – Any blockage the... Part of our day to day life hear water running through the water flowing through.. Technology gives you hot water on demand ), there is no need a! In areas with a cold climate like Massachusetts two or three bathrooms had a problem tankless!

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