Navien combi boiler problems forum. My domestic hot water side is set to around 125 F.
Navien combi boiler problems forum. On startup I received a 003E.
Navien combi boiler problems forum The story - I had a small but growing leak in the flow sensor of a Navien CH-240-ASME boiler. The output for the domestic is much higher than space heating. Since the Navien CH-240-ASME carries the ASME section 4 approvals and plate, your argument that it is not a boiler is false, that's all. In all of the YouTube videos I've watched the manifold systems have service A combi boiler size is chosen by ensuring that the unit can satisfy both demands. Only thing I had to change besides cleaning filters was expansion tank so far. A good many of the problems homeowners have with them is due to incorrect installation by the "professional" who didn't refer to the manual when initially installing the piping, or pumps, or they left out a sensor, or never dialed in the many software options in the boiler control panel because it was Dec 24, 2024 · We have a newly installed Navien combi system. Then Combi boilers also can provide endless hot water in DHW mode, similar to a tankless water heater. BUT. Heating side has a 30 lb relief valve so it's relieving. It appears to be condensate but I am not sure why it would be oily. A proper DT circulator will fix your issue. A great family friend who owns a heating and cooling company was nice enough to really help us out on replacing the our 60+ year old cast iron boiler and water tank with this. Jun 21, 2024 · Hi all, as the title suggests I recently had a NCB 240/110H installed with an external Grundfos Comfort PM circulator pump (circled in image). Dip switch 2 is on, so that confirms it. I bought my house in 2015 and was impressed/excited about the high efficiency radiant floor heat system that was powered by a Navien CH-210 combination boiler. Oct 25, 2023 · Navien CH-240 Combi-Boiler will not shut off DHW after closing hot water faucet. Dec 7, 2014 · Boilers - Home Heating Steam and Hot Water Systems - Navien 240 Combi Whistling Noise - Hi all, just installed a Navian 240 Combination boiler/H2O tank on propane. Condensing combi-boilers deliver high-efficiency endless hot water and space heating in one compact unit. DO NOT BUY A NAVIEN BOILER . If it’s a combi boiler try shutting off the cold water inlet at the boiler. Our old boiler was a Burnham Freedom FCM120 and it provided more than enough heat for our home. My pressure valve from my Navien combi boiler is leaking, but only when I open the pressure valve. 200Replaced Navien 30004680A NG Flame Rod with Gasket30004680A ($8. Then E012 again Which we reset by hand and then it worked again for a month, and then E001 came up. I tried another outlet (on another breaker) and it does the same. I am a new home owner and inherited Navien NCHB 240 E combi pressure with the house. Oct 19, 2018 · Hello, I'm new to the forum and hopefully someone will be able to help me. May 30, 2019 · Anyone has experience with Navien combi-boilers or Navien brand in general? My HVAC guy recommended it, but I can't seem to find much reviews on them online. e. Can anyone advise on what the issue could be. Dec 19, 2013 · Boilers - Home Heating Steam and Hot Water Systems - Navien boiler not heating home. Mar 31, 2019 · Hi, I am homeowner trying to troubleshoot a problem with my heater. Nov 29, 2019 · I have a Navien NCB-240E connected via two wires to a traditional thermostat and all is well. My current Slantfin mid efficiency boiler is about 16 or 17 years. The problem with the system is the fact that it is most likely overpumped and the DT is smaller than 20. www. 95)Repla Dec 18, 2017 · Navien combi boiler- zone issue Jump to Latest 11K views 15 replies 5 participants last post by Joecap Dec 31, 2020 As far as combi boilers go, Navien makes quality products and I use them almost exclusively for tankless water heaters and combi boilers. Fortunately the problem was occurring while on the phone. Heating seems ok. Does it exist? Rinnai List's the their tolerances on page 15 of the Condensing installation manual. I can follow wiring diagrams - no problem. The Navien CH combi heater is also available as non ASME, CSA 4. Jan 16, 2022 · Posted this over at the General Plumbing Discussion before seeing this more specific forum. The house is only 1,300 square feet. Maybe look for that setting and toggle it off, if it is enabled. We have had the unit for a little more than a year (two winters) and it works well until the temperature really dips (right now it's 8f with a wind chill of -10f). It also has Navien NCB 24kw combi and Navien NCB 35kW combination boilers. is smaller that PVC , and check the fittings, they must not be metal fittings because the condensate is acidic. Ultimately, I used a linear taper 25k potentiometer in series with a 27k fixed resistance in lieu of outdoor reset to get the temperature range I wanted. Great boiler by the way. Navien sells only to wholesale. Some of the combi boilers run short cycles to keep the DHW heat exchanger hot all the time. The manual says to take the circulating pump off of freeze protection mode. This 10 year limited warranty on heat exchangers, 5 year limited warranty on parts, and 1 year limited warranty on labor (“Warranty”) covers defects in materials or workmanship when the Navien NCB-H Boiler (“Product”) is installed by a properly licensed plumber or contractor and operated in strict compliance with the Installation & Operations manual procedures, subject to Hello, Our 2007 con mod boiler needs to be replaced and I have two contractors providing estimates for a new Navien combi boiler. David Effective. Oct 8, 2021 · He had an old LPG gas boiler feeding a Santon Premier unvented cylinder feeding 23 radiators and hot water for the kitchen. There are 2 thermostats, each wired to a zone control valve. Feb 7, 2016 · I have a new Navien NCB-240 water heater and I want to install a new Sensi wifi thermostat. They are certainly better than many older tankless water heaters. I belive this is "standard / typical" for any combi-boiler. A month ago after refill my Navien started to make short (1-3sec) Appalling customer service. Oct 6, 2021 · It might be a problem with the zone controller not getting the word to the boiler-- or, if the boiler is already warm from, say, a domestic hot water demand, it could even be quite normal. Hi all, I installed a Navien NCB 240-130H Combi boiler to after the indirect hot water tank went on us back in June. During the cold snaps that fall below 28 degrees F the heat in the house drops from 72 to 68. Explore Navien’s NCB-H Series combi-boilers (residential only) and NFC-H Series combi-boilers I don't think you'll find many people who have regretted purchasing a Lochinvar mod-con. I'm still getting hot water on the DHW side but not getting any hot air from my air handler. With over 20 years experience in the boiler installation industry, James ensures that he knows everything there is about our Gas Safe boiler installations, energy saving and home heating solutions. Here is the situation. Jan 1, 2015 · What you have is a system design problem, not a boiler setting problem. the condensate line went into a mason jar. The biggest mis-match for most Brooklyn houses & apartments is on the heating side. 6 GPM. There aren't even local installs to go see. , 111 Peter Street, Suite 600, Toronto, Ontario, M5V A combi boiler size is chosen by ensuring that the unit can satisfy both demands. I was interested in the system lacking a primary loop as would be created if the installation had included the recommended Navien NCB-E manifold. 5 gpm at 180°F - 160°F gives you at output of 88mbtuh. This created more problems. Now the boiler cracked and the manufacturer no longer makes ODV boilers, but they are offering me a discount on a gas replacement. Nov 15, 2017 · I was sold a Navien NCB 210E combi boiler in August with the golden promises of its efficiency and effectiveness. A combi boiler size is chosen by ensuring that the unit can satisfy both demands. Again the boiler will not shut off, even when thermostat is placed in off mode. But yeah, I don't know much about this stuff. Nov 6, 2024 · I have Navien NCB-240/130H Installed. Dec 27, 2017 · Hello, I'm new to the forum and I'm here because of a similar issue with our new Navien combi boiler (NCB420e). I was told of 2 other brands that make ODV boilers but neither are stocked and both have 6-8 week lead times. Your man was creative but missed some fundamental hydronic design principles, and like many, was over is head with this combi-boiler. The cost of installation is between £700 and £1000. I found the service manual and checked out the flame rod. A Taco zone controller is used to provide 6 zones. Their are much nicer boilers and combis on the market just like every thing else is priced high to low end. Cause for inlet, 3. The cost to install a Navien NCB 40kw combi boiler varies depending on where you live, and the price of installation. I've had to replace one on a Navien that was installed on a black iron piping system operating with a city water feed. The pipes that go to the air handler are cold to touch, I suspect On a new Navien NFB 200H boiler system, that runs three heating zones and an inidrect tank. Nov 22, 2021 · After a few calls to Navien I finally get a pretty solid tech specialist to talk to me. However, the Navien unit has been an absolute nightmare to live with. I am leaning toward Bosch Combi. Combi boilers also can provide endless hot water in DHW mode, similar to a tankless water heater. No, as long as you can stand on front of the boiler without anything in the way, you're fine. If they're not having problems with hot water, it would suggest they can get the 80 for the space heating input. I've had no problems with it as we head into the 4th winter with the unit. Navien Combi boilers offer endless hot water on demand for any size home, and with heat inputs up to 199,000 BTU/H, they are compatible with a variety of whole house heating applications such as finned tube and cast iron baseboards, radiant floor heating systems, fan coils, radiators, and air handlers. The NCB300 combi boiler offers the same powerful heating and flexible installation options as larger models, but in a compact design. d. On spring/fall days with lower heating requirements, the boiler will tend to short cycle and efficiency Lowest price guaranteed on Navien NCB-240/130H 199,900 BTU DHW 130,000 BTU HTG Condensing Combi-Boiler. I have a Navien combi boiler at home and I've really like it. Installing modulating burners and heating systems is way more than just a "hookin'-up Sep 10, 2021 · The icon for faucet spray shows that "recirculation" is set. Techs redid the gas piping to increase from 3/4 inch NCB-H Combi-Boiler Application with Single System Circulator with AHU Shown with Manifold Kit Part #30026576B PDF DWG NCB-H Combi-Boiler with Multiple System Zone Valves Shown with Manifold Kit Part #30026576B Jul 16, 2023 · The exception to this is if you plan to add additional heating zones in the future. However, when I raised the LL setting, I got more heat to the baseboard radiators. Dec 10, 2020 · My Navien Combi Boiler installed Dec 2019 consistently runs at a high pressure - 27-30psi. Heard it "click on" when I May 26, 2021 · These parts are similar across all of their water tube heat exchanger products. They indicate particular issues within the boiler system, such as problems with sensors, circuits, or mechanical components. I turned on the water-supply valve and waited until the sound of water flowing into the boiler had stopped. There is nothing in either manual or The Navien NCB COmbi can produce more than just 40kw. - I had a Navien CH 240 NG installed the other week. 37kW* 41kW* *Again, the latter two are largely distinguished based on their flow rates. The upstairs living accommodation has a separate combi Apr 16, 2024 · Boiler fault codes are specific alphanumeric codes that appear on your boiler's display. I wanted to replace that setup with a Nest. Heat was fine from Feb thru April. , power outputs): 28kW. 05-30-2019, 07:36 PM Feb 4, 2023 · I had a plumber replaced my boiler and water heater for a Navien combi. Yet I am getting an alert on my screen that reads "Supply Limit Control! Sep 30, 2024 · Having moved to a new property in June, the Navien NCB300-28K boiler has only been used for the hot water. Oct 2, 2011 · With a new installation of a Navien ch240 combi boiler/hot water unit, the hot water takes a good 45 seconds to reach a fixture that is only 3 feet from the unit. I have had a big problem with the Navien 240CR that I put in a salon after consulting with my Rep and also Navien. I Hi, I called it a combi-boiler because when I googled my model, that's exactly what it says on their website. (Our Century Boiler TWZ150 boiler supports a 40 gallon Century Boiler Mega-Stor indirect water heater; temperature control on it is set at 135. Navien Technical Support offers real time remote video Feb 24, 2015 · There is reference to "cascaded" boiler and water heaters in the installation manual. I plumbed it primary/secondary with t's spaced within 4 pipe size diameters. I wouldn’t discount other brands though: for example Rinnai products are nice. Making a "postmortem" take apart on the valve was not possible. This wasn’t through an auto feeder or through Navien’s 1/2” tapping for feeding water. May 28, 2019 · Whether combi-boiler or tank type water heater, even if you DIY the installation it's important to have a qualified tech do the final review and commissioning, testing your gas pressure drops at different burn rates, verifying the combustion efficiency etc. Cost: $22,000. I have the temperature set to 120*F, and when I open a faucet, the boiler ramps up, the water gets hot, but then the boiler cuts back and the water gets cooler, and this continues. Looking to replace a weil-mclain boiler GV-5 series 1 input@144000 btu ,122 out with a navien combi model CH-240 to also Phil Retired HVAC/ Electrical & Boiler contractor. Jan 10, 2015 · If you got 3. The test there is does the boiler eventually fire up if the heat is left on for any length of time -- say half an hour? Oct 8, 2021 · Find brochures, manuals, guides, labels, specs, drawings, revits & certificates for Navien NFC-250/200H condensing combi-boilers. It seems that when it is extremely cold (like -20 C) the whistling is reduced. It sounds like a good idea, but takes some discretion and experience to design and apply properly. I have Navien NCB-240E installed 1 1/2 yrs ago (manufactured 2016) on propane. I know we shouldn't talk prices here, but I hope it's OK to say that the estimate for the Lochinvar + indirect is about 50% more than for the Navien combi. The blue circulation pump in the picture is for pumping hot water across our house to the kitchen do it doesn’t take so long to get hot water in kitchen. Appalling customer service. I have it connected to a hydro air handler on the space heating closed loop side but for now I am only going to flush the domestic hot water side. Dec 31, 2022 · It is a two-zone system. cost include the following: * New Navien Combi Boiler 199k btu tankless with stainless steel heat exchanger. Feb 18, 2015 · The other factor which is often overlooked with the new Navien combi is the limited output while space heating. 6 days ago · The Navien NCB300 combi boilers are available in the following sizes (a. This was at the flush valve of the domestic water. May 26, 2021 · Navien tankless water heaters, boilers, and combi-boiler with water tube heat exchangers have a generally good reputation. Two of the estimates recommends Navien Combi and One recommends Bosch Combi. On a hard reset , during power up it would do it normal purge. That is essentially all Navien tankless water heaters, boilers, and combi boilers EXCEPT the "NFB" series that have a cylindrical fire tube heat exchanger instead of that rectangular stainless steel box shape of their water tube heat exchangers. Navien sounds great in theory, but it's so new there is no local track record. twice. For example, if you had a 100,000 BTU requirement, had a system flow of 10 GPM and a 120,000 BTU boiler with 6 GPM: Mixed stream formula 195-degree boiler setting x 6 GPM boiler flow rate + 180-degree system temp requirement x 10 GPM system flow rate / 6 GPM boiler + 10 GPM System = 185 185 degrees would be the maximum temperature at 10 GPM the Explore Tankless Combi-boiler Applications. ) * Removal of old boiler and hot water tank. Any ideas how to take care of this and what steps to take to prevent it from happening in future? Thanks. Jan 3, 2025 · I recently installed a homemade Navien combi boiler with a manifold and baseboards. etc, no errors. I tested & Navien tested my customers well water; both produced about 140mg/l max level. When the switch is set to run in diagnostic mode we set one of the switches to make it run in stage two it works fine. When the boiler is firing up, there is a loud whistling sound that comes from boiler. (except in 5 states it must always be ASME) I had considered having them go the route of clocking, but then realized this was a combi. Mar 12, 2021 · Thinking of doing a hybrid heat pump 40 gallon tank for our potable hot water and installing a Navien boiler (not combi) to replace the combi. May 21, 2017 · You'll find that at high fire even the smallest wall hung combi boilers are usually 2x-5x more burner than is needed for heating the place. At each of these locations there are 2 V8043 zone valves with individual 3 wire thermostats. Not the problem, but definitely a problem: The min-fire output of the Navien CH210 in condensing mode is 18,000 BTU/hr. Moreover, as gas combi boilers only heat the water your household uses, you will also pay lower energy bills in comparison to traditional regular boilers. The strange thing is if Nov 13, 2020 · I have a six year old Navien CH240 combi boiler. Also hot water supply is great. com Pg 111-113 regard the settings for heating. I hope to find someone who has some new ideas or who heard of a similar problem? Jul 3, 2015 · [Update Nov 2019] Are you having Navien problems? I personally had a Navien combi-boiler installed in my family home in 2016 and couldn’t be happier with the decision. Feb 1, 2011 · The Navien CH combi boiler carries ASME certification along with CSA 4. Mar 16, 2012 · Navien combi boilers. Earlier today, they came to take a look, and will provide a quote for a Navien combi boiler. Without an active flame it would be a fairly short while the cool down time with even modest flow through the heat exchanger is measured in seconds, not minutes, but could conceivably be as long as 10 seconds. This results in the boiler modulating itself down. Feb 14, 2021 · When properly installed Naviens aren't really very finicky at all. 3 since ASME is not a requirement in the states till above 200,000 BTU or commercial or multi occupancy applications. The boiler has problems getting starter but after the initial short cycles it runs 10 min. This means our combi-boilers are not only highly energy Explore Navien Combi-boiler Applications. Colder outside, higher boiler target temp. Have to shut off at power switch. Scalding within 10-15 seconds at every tap in the house. Just asking those following the main forum if they have experience with Combi 3 way valve failures. Apr 9, 2024 · I'm building a new brick ranch style home (Northwest IL), (2200 sq ft) and it has an unfinished basement. VerticalScope Inc. New boiler is a Navien combi and the pipework is a work of art! The installers came out again and said boiler works as it should so problems is not of their making. You can contact me through my email. When we first installed it, the hot water seemed instant and HOT. For outlet, newer model should be negative because the inducer suck in the gas and air; for old model, you have to follow their instruction on how to set gas pressure, you cannot just measure the manifold pressure. I cannot get Navien to give the tolerances of their heat exchangers. Most boilers come fitted with 30psi relief valves, but most can be safely re-fitted with 50 psi valves. k. The boiler is not recognizing a call for hot water from our kitchen sink however this only happens when we have the radiant heat turned on and both sides of the boiler active. So the technician came back and spent a few hours looking at it and going through everything. Jan 3, 2024 · I have a 2. Advanced Search Cancel Create thread New Forums More Login / Join. The input flow sensor did register the Jan 28, 2024 · I have an NCB-240E combi whose domestic hot is flaky (at best now, cold showers abound). Dec 15, 2017 · Boilers - Home Heating Steam and Hot Water Systems - navien ch240 hot water is working but not heating the house - The problem started this morning / last night. A few of the above reviews indicated that a Navien boiler will last about 5 to 7 years. in this video I explain how to correct the 3 most frequent problems of a Navien combination boiler. My domestic hot water side is set to around 125 F. Jan 6, 2022 · Hello, I am preparing to do a flush of my Navien NCB-240E combi boiler. the plumber is telling me that due to a high demand of hot water, the boiler can't Jul 15, 2018 · There are no other uses for the chimney except for the old boiler that is being replaced with the combi boiler. The boiler when turned on by house thermostat runs, heat exchanger heats, no hot water circulates to radiators. May 16, 2024 · James Elston is our resident boiler replacement and heating expert here at Boiler Central. From what I saw online, Navien states that plastic does not contain any oil that The first tech came after 012, deacaled it, reset it and it was fine for a few months. I put 20 psi into the system and had a gauge with telltale needle on the baseboard heat loop. The following conditions exist: the over pressure releases frequently at times- occasionally every 90 seconds, especially in the morning, then less frequently during the day/night. 02. Feb 15, 2016 · If the pressure relieve valve is opening up it's not a problem with the sensor- more than 50 psi IS an abnormal pressure! If the expansion tank is not properly charge, or it has failed or if it is undersized the system pressure can go quite high. The heat is not hot enough to heat each apartments. It lasts for about 10 to 20 seconds. Jan 1, 2021 · I had a new combi 240E Navien unit installed a couple weeks ago that has been doing well on two of the three zones in my house but not able to keep up with one of the zones. Previous homeowner replaced the old Navien combi boiler couple months before the closing. I believe this unit is 6-7 years old. This reduces the hot water wait time. Mar 12, 2016 · If the water was still flowing slowly due to convection or momentum after you brought the system down it could continue for awhile. Then, analyze the amount of heat emitter you have on each zone for how much heat it can deliver at and average water temp of 120F, which is what it takes to actually get the mid-90s efficiency out of these Navien is a Price point boiler for sure. The burner would light off however if it is trying to maintain the HX A few of the Lochinvar combis allow you to choose between cold start and always hot. What's New; Forum Listing Feb 22, 2015 · Hi, I have a Navien Combi Boiler (CH-180ASME). Oct 2, 2024 · In summary, a Navien combi boiler can range from $3,500 to $6,000 for the unit itself, with installation bringing the total cost between $12,000 and $26,000. I can run a new wire from the NCB-240E to the Nest. Instead of spending all the money to line the chimney (Switching from oil to natural gas) I was hoping to just run either 2" or 3" PVC pipe depending on the distance. I am a little surprised that I appear to be the first person in the UK to try to use a Honeywell Opentherm gateway with a Navien combi (or at least, the first person to complain about it). 5yr old npe-240a2 and the breaker keeps popping. Sep 30, 2021 · Hi All - new to the forum and would appreciate some expert guidance I would like to install a Nest to control the boiler. Feb 28, 2022 · Last week my Navien unit stopped providing domestic hot water and flooring heat , but also provided no errors at all. During warmer periods, the whistling increases. I closed the backflush valves to the boiler and also the house feed line into the system. 4 days ago · Hi! I have a 1 year old navien gas combi unit. Navien Installers swears by the quality and blames Bosch for not having Stainless steel heat exchange. The problem is that the cable back to the boiler only has 6 wires. Always let your contractor know your immediate and long-term plans for your heating system so they can determine which Navien combi-boiler best fits your needs. . 00(Oct. It provides heat to our first floor radiant heated floors. I'm at the decision point for heat and was pretty set on a W/M GV90+6 unit (91% AFUE) with a Aqua 2 series indirect water heater, model 85, when I was told to explore the Navien NCB-240 combi-boiler, (95% AFUE). The background: It was officially operational Sept 1. I'm unsure of what type of wire to use and where the connections should go. Not sure about Navien, but my top contender is a Navien NHB-80H because it can modulate the lowest providing 8,000 to 80,000 BTU/h (these might be input numbers) and it has a 15-year heat exchanger warranty. Take for instance the embassy onyx, marketed as a boiler as itself and under other US boiler brand labels but, once you look at thier liiterature it says "combination heater". A qualified contractor can perform a heat loss and help recommend a proper combi boiler size. Oct 30, 2023 · Navien combi-boilers are compact, wall-hung units that will free up a lot of space in your home! Navien Combi-Boilers Are Highly Efficient. You do not have 199mbtuh boiler, you have a 199mbuth input water heater that is capable of limited space heating entirely dependent on factory limited flow factors, i. Oct 16, 2021 · Hi All - Having an issue with my NCB 240 combi boiler that I'm hoping someone can help with. The valve got stiff and stuck unable to make domestic hot water. ) I’ve tried higher HL settings with no change in heat going to the house radiators. The new NFC-H has more heating and DHW capacities for today’s larger progressive ho Oct 12, 2021 · In this video I explain how to correct 3 different re-ocurring and most common problems with Navien condensing combonation boilers Nov 14, 2021 · The boiler uses the temperature sensor to set the aquastat target temperature. Without the outdoor sensor, the boiler will default to the max (about 180f usually) anytime there is a call for heat. Since the install the Domestic hot water has worked perfectly, but this is the first week of colder weather and this morning I noticed the house wasn’t warming up and the baseboards were cold. Clogged baseboards would not account for the boiler not reaching temperature. DHW is fine. navieninc. I have nothing but problems. Feb 12, 2022 · The Navien was installed about 10 years ago, and has ran with very little issues over the years, same tanks (2 - 500gal), same feed line to the house, etc. Apr 3, 2021 · The picture made the boiler look like it's 1" from the wall. Nov 18, 2022 · Troubleshooting Navien CH-240 ASME Combination Boiler with Error Codes E12 and E3. Still working out some issues regarding it getting dialed in. On startup I received a 003E. Last night we decided to test the radiators so, following the (basic) manual, I did the 5 second M and + button push which brought up a number (5 Switched Live, I think) The other options are: 1 Navien Thermostat 2 Panel 3 OpenTherm 4 CH Nov 10, 2022 · This is not referenced in the Navien service manual. and then the problem is gone . These are both made of some kind of black plastic. I have been dialing in a Triangle Tube Instinct. Worked fine for the last six winters. The number one piece of diagnostic info was random clicking sounds coming from the unit--both the experienced plumber and navien said this. Then there’s a pump on the indirect hot water inlet. I don't have room to build a chimney on that side of the house so I have to go with a DV. T-stat off, boiler on. Oct 30, 2011 · in this thread in this sub-forum in the entire site. What we know at this time is the Gas pressure is good, fires up to stage one but fails going to stage two. Off for last 5 months, DHW works very well at all times. I want a direct replacement just to make things easier for the plumbers. With heat inputs up to 199,000 BTU/H, our combi boilers are also compatible with a variety of whole house-heating systems including: In Sep 2018, a different installer indicated that a Navien boiler will cost about Cdn $5,900. There is one secondary (system) pump, a Taco-007. ex: Chlorides up to 250mg/l. Two heating zones each with its own circulator pump. I've moved in for 3 weeks, everything was fine until this past week when the temperature dropped. --from Navien Combination Boiler Installation & Operation Manual Version: 1. That thermostat requires a common wire that would supply 24VAC. Navien condensing combi-boilers have a patented stainless steel heat exchanger that recovers heat from exhaust gas which would otherwise be lost. Since then, it has failed to keep up with the heat demand when the temperature hit -10C and the propane consumption has been ridiculous. There is no code, Error, leakage or weird sound. Feb 23, 2014 · The domestic hot water was good. For a zone with 36' of fin tube that's 500 BTU/ft, which takes an AWT (not output temp) of ~160F to balance with the boiler output, even at min-fire. I have added a blue and green wire to provide power to the thermostat but don't know where on the NHB board these wires should go. Nov 3, 2013 · They told me it sounds like the boiler is short cycling and I need to do a heat calculation on my building or they are not going to help me . sorry about the start i started sidewaysHTTPS://WWW. I've installed other high efficiency boilers but never anything like this. 5" is not enough. When I turn on a faucet to call for hot water, the flow rate is 0. That gadget will wok, @Derheatmeister-- but I would use it only if, when it fed, it also shut down the system -- since when it feeds it is indicative of a leak. Oct 15, 2018 · I am sure some of you have expeirenced this. Our gas bill is very cheap and the system does a great job of keeping the house evenly heated. One directly under the Navien boiler, I believe that is for pulling water from circulation to boiler. In other words, when the valve is closed, no problem at all. The Navien does supply heat too. Search titles only By: Search Advanced search… Navien combi question I just installed my 1st Navien ch240 combi. A new Navien combi boiler was put in to replace the old furnace. a. 4. Combi boilers usually a bit too big for the design heat load, and often too big for the available heat emitters, though the -150 still has a reasonably low minimum firing rate Aug 29, 2020 · The installer spoke to Navien who are investigating the matter but the first impression is that there is an interoperability problem. also we have a Goodman forced air furnace that is less than 10 feet away from the Navien, and that has ran all winter with zero issues, (even before the regulator change). After reading the instructions from Navien, which state to open the air valve cap (the one on the internal circulation pump for this 2015 build) before filling the unit with water, the cap came off as I was opening it and a whole bunch (about 10-12) of Take for instance the embassy onyx, marketed as a boiler as itself and under other US boiler brand labels but, once you look at thier liiterature it says "combination heater". Navien combi boilers can provide whole house heating for small to large homes, and endless hot water for up to 3 showers and a dishwasher at the same time. 5" gas pressure on a Navien unit, you are having problem. Looking at reviews, both boilers have good and bad reviews. I recently bought a new house that was converted to gas. They both sais that it would take car of the problems that I was having. I have to agre Scottie please tell me a little more about your problems with the Navien. The 28kW edition comes with a domestic hot water (DHW) flow rate @ 25°C temperature rise is 16 litres per minute. Our award-winning combi boilers are stocked in plumbing merchants and builder’s merchants nationwide and are fitted by our dedicated network of Gas Safe Registered installers in every Jan 16, 2022 · Navien ncb-210 combi boiler air vent issue After reading the instructions from Navien, which state to open the air valve cap (the one on the internal circulation pump for this 2015 build) before filling the unit with water, the cap came off as I was opening it and a whole bunch (about 10-12) of little washers came out of it. Jan 21, 2013 · I have a Navien CH-240 Combi (new install) in my second home, and the domestic hot water temperature is unstable. Currently running at 180 temp, Tstats set at 72, not satisfying, only reaching 68 when its real cold outside (20/25). I have 2 air handlers, one in the basement and one in my attic. As an installer in the industry i called to speak to technical 6 months ago with a query and was told id get a call back and never have then ive called in today and been trying for 5 hours to speak to someone in the technical department. It is good for minor leaks, though -- assuming one remembers to look at the display. New NFC-H highest heating and DHW performance ever built into one compact combi-boiler Navien innovation, durability and proved fire tube technology has done it again. the old thermostat used 2 wire (R & W), which are connected to CN10 on the NHB board. I've had intermittent breaker trips over the last year but not its happening every time I plug it in. I told them I have a problem for 3 days , I unplugged the power for 15 min. 2013) As a precaution, I attached a neoprene tube over the air vent nozzle (where the cap had been) to drain any escaping water into a bucket. Zone 2 is fine, but the other, Zone 1, is set for 69 and can't maintain temps more than 65 when the outside temp is below 50. 9 as a boiler. Combi boilers may also reduce the installation cost by reducing the number of appliances, possibly reducing the number of wall or roof penetrations required for exhaust and intake piping, and may reduce some of the gas piping requirements. This apparently is the valve sticking and beginning to fail. Should be similar in price to putting in a Utica and redoing the piping, but this way the Navien boiler won’t be stressed as much as a combi and we won’t have to do any piping. I fired it up for the 1st time yesterday and cannot get a 20 degree delta. When I opened up the panel there was a brown oily fluid on the bottom of the heat exchanger and on the intake. Dec 28, 2024. It’s been running well overall, heating the second floor effectively using an outdoor reset temperature sensor. Jan 26, 2022 · The bottom line is that the Navien Combi-boiler can either be creating hot water on demand for shower/ sinks /Washing machine/ Dish washer (Domestic Hot Water or DHW) or producing hot water for the three heating zones to heat the house - but it can NOT do both at the same time. Jan 16, 2024 · I've had a Navien NCB-240/130H combi boiler now for two months. There are 3 "manifold" locations with 2 zone connections. Test One, 2 hours. Am I right that on this unit it’s instead of the check valve Nov 16, 2016 · The boiler was manufactured in 2013 and installed in 2014. The boiler dropped to 0. 0 psi withing 30 minutes. Dec 15, 2019 · Navien 240 Combi-boiler, Water Leaking from pump air purge valve Thread starter Ellis Loew; Start date Dec 15, 2019; Boiler Forum; Replies 0 Views 64. Typically with a combi boiler, the BTU input will be higher for the DHW demand than for the heating load. See: Apr 28, 2018 · The plumber I was consulting with recommended Navien and since I was planning to change out my old Weil-McLain boiler soon, he suggested the combi-boiler. It used to run without problems for a while and started to cause problems the last few months, although nothing was changed. Cold snap and expected heat to come back on without issue. I must note that the condensate drain line appears to be 1/2", which is contrary to recommended sizing in PEX because the i. The unit turns on, starts up, I hear some water flow then it trips Dec 19, 2021 · I recently inspected a Navien hot water heater. SHIEL I've been quoted for 3 brands and multiple models (both combi and boiler): Navien, Lochinvar, and IBC. I have 500gl outside propane tank with 2 regulators (on the tank and on the house). Each zone and the system circulator pump has pretty beefy pumps, Grundfos UPS26, all brand new, no issues. While I have no prior HVAC experience, I followed a combination of YouTube videos, books, and advice from online forums to set up the system. I’ve seen on other Navien units that intermittent domestic hot could be fixed easily / cheaply with a replacement check valve. However Bosch seems to be little better reviews than Navien. Sep 9, 2017 · Air pressure in tank should be same as water pressure on a cool- warm boiler and no water in the air when checking pressure or else the the ex tank bladder is bad. We offer fast, free shipping with every purchase. Not even close. Works great. * Installation of New Boiler First is the Lochinvar WHN-085 boiler + indirect water heater and the other is a Navien NCB-210 combi unit (with tankless DHW). On the Navien I found a terminal marked CN25, it has three connectors and in the wiring diagram this terminal is marked as "AC24V, External AC Output". Jump to Latest The Fora platform includes forum software by XenForo. We have had zero issues with the system and it continues to perform flawlessly. I did a test. Oct 17, 2023 · Option 1: Replace the current system with a Navien Combi Boiler, 199k BTU tankless. I’ve had a boiler that was feeding water from the inlet of the domestic side to the boiler side. every time it fires up for water or heat, there is a loud, high-pitched resonation. Jan 6, 2022 · I have a Navien NCB 240E combi-boiler set up for hydro space heating and domestic hot water (installed 2019) I am having an ongoing issue and can't figure it out. Have turn off boiler by power switch. the house is a multi family house, currently 4 apartments. Convenient payment methods and stress-free financing options are available. I removed the old one and replaced it with a new one, fixing that problem. Due to the DHW needs for the small apartment and the remainder of the home being a combination of two full baths, two kitchens with dishwasher and a washing machine, he recommended we go with Hi, I am going through the same problem. Factors like home size, piping, and location will impact your final cost. Oct 5, 2022 · 2/2022 Partner replaced a 1969 American standard gas boiler and dying water heater with a Navien NCB 240 Combi Boiler. This combination of features makes the NCB300 gas boiler an excellent choice for smaller properties where reliability and DHW performance are the priority. Now the bad news There appears to be high failure rates of the exhaust vent gasket at the sheet metal under the vent collar, and failures the combustion chamber seal at the heat exchanger. A metric also used to judge yoga instructors. DHW temp set at 130F. Explore Navien Combi-boiler Applications. I cannot find any procedure on how to do go about changing the mode. A good installation is more important than the brand, and all of them tend to have issues if they’re not installed correctly. Pictures are deceiving sometimes. Mar 5, 2009 · Navien says their units are more expensive than Rinnai, but that the cost gap closes when the circulation pump and simpler venting are factored in. Calls for hot water would result in nothing. (Unit will support domestic hot water and heating loop. qhoeonz jbrdct bgrs ojzghh meth djq iwqyt apepr zqluc oxunj