This control board is out of a variable speed furnace with a modulating gas valve that has a variable speed inducer motor. The blower is set for 400 cfm for a 4 ton outdoor unit, and comfort-R is not enabled (all factory). Usually, gas furnaces have a temp rise of 50F. 80% would be great for me. The variable speed furnace delivers the proper amount of airflow based on the heating and cooling needs of your home. Air Filters remove dust, lint, pet dander, and other pollutants so you can breathe easier knowing your indoor air quality is better with Trane. We have been heating the crawl space in our house for several winters because the ductwork was all torn up from rats. Switch the power back on and test it. Identify the blower fan and the speed wires. Remember that a heat pump in heating mode will need to run with roughly the same airflow speed as during AC mode even though it may not be comfortable for the building occupant. 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. Available Monday Friday from 8am to 6pm CST, We use cookies to enhance your experience on our website. Ilook forward to responding to many more! The wire's color will determine the speed settings that the motor will run at. I've gone through the process of adjusting the manual zone louvres on the main ducts (and on registers) and checked them with my camera for blockages. I'm getting a new s9v2. BarnArtist, locate the wiring schematic on your furnace. It wasn't the noise that was bothering me, it was the desert-like sensation of swirling dry air. How does a furnace work? To adjust the dip switches, turn the power off and take a flat head screw driver to lightly push the dip switches to the on/off desired position for each numbered switch. Yes: you will save electricity costs by running your blower on low. This trick only works on gas furnace systems with a multi-speed blower. I needed to go the opposite direction and increase fan speed. To switch the jumper, you will need to hold onto it gently as you pull it out of its current setting. He currently has a home shop where he sharpens and rebuilds saws, repairs lawn mowers, mobility scooters, hydraulic jacks, and anything else that comes along. Select your preferred wire with the warm temperature and connect it to the 'heat' port. AC Service Tech HVAC Training is made possible by continued support from our visitors, customers, and support from these Sponsors! If the terminals are present at the motor module (ECM X-13) you can switch speeds at the blower motor location. bean. A 90 percent-plus furnace needs 150 cfm per 10,000 Btu of input. The automatic feature rarely kicks in once at set point. If you have an HVACR relatedquestion, drop it in the comment section of one of theYouTube videos at theAC Service Tech YouTube Channel and I will do my best to respond. Thoroughly rinse the filter. Usually there will be three "speeds" ranging from 40 to 100% of airflow. During the awake hours I Hold the fan speed at either low or medium. By pressing "submit", I understand that I am providing express consent for Trane Residential to contact me about this request or similar topics. We have a Trane XL80 furnace manual in pdf version that you can download for free. In Dungeon World, is the Bard's Arcane Art subject to the same failure outcomes as other spells? Website operating One of these wires will be coming from the thermostat and the other will go to the outside unit. If you have any questions or need assistance, please contact Trane Home Customer Support via email at help@tranehome.com or call 1-877-288-7707, Monday-Friday 9 . Most require that you open a box (2 screws?) Iappreciate all the comments, questions, and responses that Ireceive from each of you. Where To Find R-22 & R410A Leaks on AC Units! The remaining colored wires will be default speeds. How to use Slater Type Orbitals as a basis functions in matrix method correctly? Select Climate from the blue menu on the left side of the page. A lower fan speed ensures your heat pump will run for longer periods of time which is required for the system to go into what's called a defrost mode ( watch this video on defrost) Running the fan too high can mean your heat pump will not run long enough in order to kick into a defrost cycle. 10 Reasons a Blower Fan Won't Start in a Furnace, AC or Heat Pump. Reddit and its partners use cookies and similar technologies to provide you with a better experience. I would think adjusting the heating element would save more energy than reducing the blower's electric consumption, but I didn't do a study on it myself. We welcome your comments and suggestions. Changing the fan wire connection between the fan-on relay and the fan motor, selecting a high, medium, or low speed right on the fan motor itself Changing jumper positions on the control board (printed circuit board shown below) in the air handler Changing a dip switch or small slider switch position provided on some air handler control boards The fan speed is very low when not heating/cooling. Can airtags be tracked from an iMac desktop, with no iPhone? The house has a 3 ton trane xl20i and an xv80 (4 ton max). Fortunately, theres a simple fix if you look at your furnaces Integrated Furnace Control (IFC) board. It only takes a minute to sign up. Mine. Test your knowledge with our 1,000 question workbook along with the answer key! If a clear distinction between the blower speeds isn't obvious in the data, then you're probably not going to save much money either way, so go with what's most comfortable for you. That will give you the most reliable results for your particular system. He has been DIY since childhood and is now a septuagenarian. - The "Continuous Fan" refers to when the G terminal is powered for the fan only to run. When changing the AC or furnace filter, the arrow should face the furnace and point away from the return duct. If you want to solve the air noise problem, move the return air filters out of their hallway locations back to the upstream side of the return air duct at the furnace. There are only a few steps required for most units and having the control will allow you to get your unit to give you the service you need. Example: 1200 CFM is needed for a 3 ton 36,000 BTU/HR system. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Mutually exclusive execution using std::atomic? Meanwhile, the Circulate setting is a hybrid and auto that keeps the fan running throughout heating cycles and then again for a few minutes every hour even when the furnace is off. Not every AC or furnace filter will have an arrow printed on the frame, but when it does the arrow indicates the direction the filter must face. My first thought was that the unit was oversized, but I figured out how to check the DIP switch settings. This can be done through an independent dehumidistat or through a thermostat's DEHUM terminal (if available). This will increase the number. Yes, there is a way to bring up the speed on the air handler.. Cross country truck driver -- over dimensional freight We also have quick reference cards for use out in the field! Narrowing that hysteresis loop will: Leading to a smaller Hysteresis loop, increasing motor efficiency by reducing iron eddy current losses. She has experience researching and creating a wide range of home improvement and garden projects, and especially enjoys learning about fireplaces and exterior design. This video is to show how you can figure out the blower speed setup in your HVAC system, and what you can do do adjust said speeds. There are also red and brown furnace speed wires. The constant torque/multispeed motor will have the smallest module. This video is to show how you can figure out the blower speed setup in your HVAC system, and what you can do do adjust said speeds. Published: 05/19/2021 Author: Craig Migliaccio, About the Author: Craig is the owner of AC Service Tech LLC and the Author of the book Refrigerant Charging and Service Procedures for Air Conditioning. to this site, and use it for non-commercial use subject to our terms of use. Trane s9v2 should thermostat control blower speed? This will show what speed each numbered tap is programmed as. No: you will not save on gas/oil costs by running your blower on low. You may freely link to this site, and use it for non-commercial use subject to our terms of use. I'm also a little concerned that this furnace might be a little undersized for our house (if I understand correctly, its a 100 BTU unit). I want to increase volume flow if possible. I have a Trane XV90 propane furnace with a variable speed blower. You have to switch the wires to the blower motor. These blower motor versions can be found in furnaces, air handlers, and packaged units. . If the pressure switch is functioning properly . For this reason, pair your Variable Speed AC unit with one of the following components: Hyperion TAM9 Air Handler, XC 80 Gas Furnace, XC 95M Furnace, or S9V2. Thanks for the reply. The problem is, the furnace control module doesn't use a separate speed when the unit is running in continuous FAN mode. ECM blower motors do not require an external capacitor to operate. The product data guide, and label on the inside panel indicate the air . The NET difference of the above two figures is your savings or cost. Questions of a Do It Yourself nature should be submitted to our "DoItYourself.com Community Forums". -The "AUX Heat" makes sure that there is enough airflow when elect strip heat is called. The main difference is that the fan ON setting means that the fan is set to run as long as the furnace is switched ON. At night with an even lower set point I switch the fan speed to automatic. Changing your HVAC and furnace air filter is a vital part of home maintenance. First, make sure that power is getting to the motor. I understand the reason for slowing the air to remove humidity. When the system calls for heat and the inducer fan begins to run, check each pressure switch terminal. After understanding what speed each tap is programmed for, we can make proper airflow adjustments. Roughly 400 CFM is needed for every 1 ton (12,000 BTU/HR) of Heat Removal Capacity in Air Conditioning Systems. See our Privacy Policy for more information. Craig creates educational HVACR articles and videos which are posted at https://www.acservicetech.com & https://www.youtube.com/acservicetechchannel & https://www.facebook.com/acservicetech/. In order for the filter to work properly, the right size is crucial. Variable speed furnaces only operate at . However, during the time period while the compressor is not engaged I need to circulate more air on the second floor or it becomes stale. lower efficiency furnace) it is drafting exhaust up the flue which can't be good. Here are how my dip switches are set: Did the installer tie in a humidistat there on that V/S blower . Additionally, they can be identified by the presence of a removable module/bell on the end of the motor. Therefore for anybody thinking to adjust their blower speed to a low setting be mindful and use caution and listen carefully as to how the system is running. It is a Trane S8X1 single stage furnace and air handler, paired with an XR16 3 ton AC unit. You can verify the actual CFM by measuring the TESP of the system and comparing it to the manufacturer's airflow data sheet. (Although it wouldn't hurt to record those too.) When one of the taps is powered with 24v, the motor will turn on and run at the selected speed. Your new AC unit is not collecting water (yet) because the anticondensation coating hasn't been compromised (yet); and that's a good thing. According to the manufacturer's documentation, your furnace should have a 3 or 4 speed blower motor. You need to follow the wiring diagram inside the HVAC unit. The blower fan on this blower has four speeds. During "Fan On", the fan runs at 50% of whatever the maximum speed of the fan is. If it goes out of spec then on "very cold days" (when the furnace runs a lot) it could trigger an automatic shut off when the exchanger doesn't end up getting cooled enough, FWIW. Typical setups include these wire colors with associated blower speeds. Certified Welder After a bit of research, (translated: "mad google skills") I found an article claiming that lowering the blower speed may increase efficiency. The furnace operates for two minutes or so before it shuts down. Unlike a conventional systemwhere the furnace goes on, blows hot air into the house at full force for a few minutes, and then shuts offa variable-speed or variable-capacity system runs the blower for longer periods at lower speeds. I just moved into a house with a Trane XR80 furnace (several years old). These are not switched off but are live all the time. Dave. View our Privacy Policy here. Many gas-fired, high-efficiency furnaces also save on the electricity required to power the blower motor, though this savings is not factored into the AFUE rating. I am just clueless, could it be the thermostat (really old) or something that is going to cost a billion dollars to fix? Solution: Install a new sequencer AND a new fan relay, just to be safe. If the relay that controls the blower motor fails while it is closed, it will send continuous voltage to the blower motor, causing the motor to run continuously. One fan is inside the house, and one is outside the home. 81K views 2 years ago In this video, we are changing the blower speed on a Trane XR 95 furnace so that the forced air furnace circulates more air on heat mode. He also builds custom tools for metal working. Heres What It Means, Why You Should Monitor the Humidity Levels In Your Home. This will allow you to access the control board. -The "AC/HP CFM Adjust" is the airflow volume to be set for system, efficiency, comfort. In order to measure air flow you could use a flow capture hood, a rotating vane anemometer, or a hot wire anemometer. If the control board is at fault, replace it. Remove two screws from each bracket leg holding the motor. If you need assistance determining the best filter for your unit, a Trane employee would be happy to assist you. maryland_irisman 14 years ago As suggested by the others, you should balance the air flow and the fan cfm should be matched to the system and duct system. New XV80 Trane furnace makes noise when blower runs at low speed. It can happen for lots of reasons, from improper furnace sizing and dirty filters to air duct insulation failures to the room being farthest from the furnace. Id check that out first. The arrow should point toward the unit. Running your furnace fan all the time isn't exactly a bad thing. On this board, pins 3, 4, and 5 on the SW1/1 through SW1/8 dip switch block have to do with air flow. H.R. Now that its gotten cold, we've noticed that several of the heat register barely have any air coming out of them. If the blower motor hums, check the blower fan to ensure that it spins freely. How exactly could I test this? Follow us on Facebook for Quick Tips and Updates here! My gas furnace has two options for the blower speed: MED, and MED-HI. How to Convert a Furnace Blower Fan Into a Stand Alone Fan, What to Do When a Furnace Blower Fan Won't Start, How to Replace the Resistor on Air Conditioner Blower Fans. The low pitched whine stops when fan is in high speed. He is also an HVACR Contracting Business owner of 16 years and holds an NJ HVACR Master License. Each is associated with a different blower speed. In fact, there's no need to worry about the fan wearing out or breaking down because it's designed to run continuously, and there's an array of benefits connected to this. The ohm meter should read very close to zero. Only 3 of the 5 colored wires may be used at a time. This helps the XR80 conserve more of the heat it produces. Here's the sequence: Furnace gets call for heat. #3. I'll edit my answer and include the exact parameters I'd record every day for a thorough study. Here's what to record, in order of importance: The last two (5 and 6) aren't as important, but more data is always better. By regularly changing your filter, you can improve your indoor air quality and extend the life of your heating and cooling system. Then switch the jumper to your desired speed. I'd go with logging temperature differential (inside temp - outside temp) vs. energy consumption every day for a month with the blower on high and then for a month with the blower on low. video below! 1995-2023 MH Sub I, LLC dba Internet Brands. Slowly flashing shows your furnace is on and does not need heat. Blower on delay settings, which evidently have an impact on the duration and speed of the blower fan. Most of these are on the bottom left of the control board. 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. I found one glued to the back of my furnace door, one in the manual, and maybe one on-line too. Yes--the efficiency of the heat exchanger will decrease. These two losses comprise the magnitude of heat losses. Motor is an ECM and it makes a low pitched whine sound when in CIRC or when the blower is ramping up or slowing down to stop. The constant air turn over at a lower set point keeps the house comfortable. Each is associated with a different blower speed. Making statements based on opinion; back them up with references or personal experience. The heat exchanger warms up the incoming air and a blower or air handler sends the warm air throughout the home. By Pressing submit, I consent that my information be shared with Trane approved affiliates and third party partners, including connecting me with a local Trane dealer to be contacted about products and services. Locate the wire for the new speed setting ("medium" or "low"), remove the wire nut from its end and use wire strippers to strip 1/2-inch of insulation from the end of the wire. I have a Trane Variable Speed Air Handler (TWE049E13FB2). Example: Rated Btu Input = 60,000 / 10,000 = 6 x 150 = 900 cfm of required furnace airflow. Check back regularly as we are always updating and improving thiswebsite! There are often five wire colors coming from your blower to your IFC. The line voltage and 24v common are connected at the top and are labeled as C, L, G, N. The 24v common is C and the ground wire is G. For a 120v unit, the L is the 120v hot and the N is the 120v neutral. Remove both of these wires and wire nut them together. Why are Suriname, Belize, and Guinea-Bissau classified as "Small Island Developing States"? Craig is a licensed Teacher of HVACR, Sheet Metal, and Building Maintenance in the State of New Jersey of the USA. You should now see a red E icon in the System Mode screen next to Auto and Heating modes. The constant air turn over at a lower set point keeps the house comfortable. I know I need to replace a dying blower motor in a 1992 Trane . HVAC system for small church has twin Trane XR90 units installed in 2009 to replace a unit with a much larger single blower. For more information, please see our Remove battery from the thermostat (or disconnect thermostat altogether). (Trust me, the worst thing that happens to me on the job is having inconclusive results due to insufficient data collection during an expensive and time-intensive study.) R and BK are tied together. I connected a second thermostat to the circuit board to run the blower (R to G). DoItYourself.com, founded in 1995, is the leading independent Know your limits. Upon initial installation, these dip switches need to be adjusted for the particular unit, size, and application. (new Image()).src = 'https://capi.connatix.com/tr/si?token=2ba02a33-c319-4410-bba7-f8321a13bed3&cid=877050e7-52c9-4c33-a20b-d8301a08f96d'; cnxps.cmd.push(function () { cnxps({ playerId: "2ba02a33-c319-4410-bba7-f8321a13bed3" }).render("00499ba9282e4d1b985fa8af14d29c2b"); }); On my furnace IFC, the black (high speed) wire is connected to the air conditioning (cool) terminal, and yellow (medium-high speed) is connected to the (heat) terminal. He owned and operated a manufacturing business building Compact Utility Vehicles for homeowner use. A MERV 16 filters particles at a level near that or a HEPA. H.R. He maintains fruit and nut trees along with helping his wife with a vegetable garden. The system also accounts for blocked vents and dirty furnace filters, and adjusts fan speed as needed to compensate. One thing I found consistently was that making changes on the RS-485 hydro heat control board and W1-W3 jumpering had notable effects (more CFM's at my test register) while messing with the mainboard DIP switches had little to no effect. Connect with our Customer Care team about your products, warranties, and dealer concerns. I am currently heavily invested in studying and learning the subject as I commit myself to reducing my winter energy costs this year. I installed a Thermo Control 2000 boiler and first fired it up this Friday. The BTU/HR capacity or tonnage of the air conditioning system should be included within the model number of the outdoor unit. Use tab to navigate through the menu items. Air Filter - Be sure to check the air filter and replace if necessary. So the blower motor is dead. Here are some of them: Better circulation of heated and cooled air. DoItYourself.com, founded in 1995, is the leading independent home improvement and repair website. PSC - The Permanent Split Capacitor Motor is still the most commonly used. The arrow should face the direction the air is flowing. Of course all that heat was lost because of the ridiculous number of vents in our foundation. Electric Furnace Sequencer Replacement Instructions for Home Repair Blower fan will not run: A failing sequencer may have a burnt contact and is unable to switch the fan and heating coils ON. Heating, Cooling, Air Conditioning, Ventilation and T-Stat Controls, 3-Speed, 4-Wire Ceiling Fan Switch Wiring. The continuous fan is marked SW3. The MERV scale rates filters from 1 to 16. Proper returns are rarely a thought. The higher the MERV rating, the better the filter is at capturing specific pollutants from the air. This value is then multiplied by 150 cfm to obtain the required airflow for the furnace in heating operation. Helm is an accomplished DIY craftsman. In my searching I have found out that there is a stupid little thermistor that burns out on the motor circuit board (it's a variable speed blower), and replacing it is a permanent fix.. Why is there a voltage on my HDMI and coaxial cables? Pollen, dust, clothing and carpet fibers, hair spray, mold spores, Pollen, dust, clothing and carpet fibers, hair, mold spores, legionella, pet dander, Pollen, dust, clothing and carpet fibers, hair spray, mold spores, bacteria, pet dander, cooking oil, most tobacco smoke, smog, Air filters are the first defense against the pollutants in your air, but building a complete air filtration system can help support an even higher quality of indoor air. Home Improvement Stack Exchange is a question and answer site for contractors and serious DIYers. I think I had it on my hard drive, and the hard drive crashed on us last winter. Air filters are typically found behind the return vent door, often located in the ceiling or wall in the central portion of your home. To clean a reusable filter, remove the filter from the air cleaning device. They have a built in or attached capacitor that will allow the motor to turn on, turn off and run at a constant speed when running. I want it for the same reason as cliff--the top floor of my house is colder than the main floor and I'd like to even things out by moving more air around. The installation guide clearly describes how to set airflow for heating mode and cooling mode. - Answered by a verified HVAC Technician . The remaining colored wires are the speed selectors for this blower motor.). On most control boards there will be a jumper that is marked to show that it controls the speed. American Standard air handler troubleshooting Can this be adjusted Again, this can usually be found in the upper-left corner. (Heat transfer wasn't one of my favorite classes in college - I focused more on dynamic systems, sorry.). This is done so that the maximum amount of heat is gained in the building from the refrigerant. The boiler is feeding a DHW sidearm and furnace plenum HX. You may freely link Sometimes you have to add more ducts to achieve the proper pressure and velocity. For instance, here's the procedure to change a furnace's fan speed with a PSC blower motor: Use a multimeter to measure the resistances of each speed wire. It allows three constant fan speeds as well as an automatic fan speed and a variable burn rate and compressor and fan speed. If 1600 CFM is too high of an airflow volume and only 1200 CFM is needed because the system is a 36,000 BTU/HR air conditioner, we can swap the yellow with the black wire on the motor module. Sometimes less cmf will give the air more time in the heat exchanger thus letting it get hotter. Based on some randomly googled comments here: http://www.inspectorsjournal.com/Forum/topic.asp?TOPIC_ID=8998& seems to agree it decreases efficiency but may increase comfort [ex: cold spots or noise level] :). It had been set on the higher speed, but that was too harsh, so I lowered it to the slower speed. You can change the settings for cfm fan speed, but you have to do it manually at the board. Does Nest utilize all the benefits of a communicating furnace, Low speed furnace fan blower motor will not shut off, How to calculate efficiency of old Westinghouse furnace VS new variable speed Furnace. But, in looking up the manual for this furnace (TUD1B100A9361), it looks like there are 4 blower speeds. Test the new speed. Variable Speed Blower Motor (Genteq ECM 3.0, 4 pin connector). -The BTU/HR size is selectable between 48,000 42,000 36,000 or 30,000 BTU/HR. In order to determine or change the speed, check the wiring diagram of the furnace/air handler/package unit that the motor is installed in. When the humidity is high for what its set at. Then switch the jumper to your desired speed. Learn more about Stack Overflow the company, and our products. When the R-G circuit is made, the blower motor operates on heating speed. Thus, my blower can't be using that much electricity on high. Press Apply to save and exit. Divide the rated Btu input by 10,000. The SW2 indicates the air conditioning size. If the Delta T continues to rise, this is due to low indoor airflow. Check out our free Quizzes to test your knowledge here! Mine has a wall switch. I understand that the higher speed is probably for cooling (for which we have a separate duct system and handler), but is it the case that the speed can be switched to a higher fan speed? air flow is inadequate to match demand and duct size. you will get the better dehumidification with the lower setting. homininet 8 mo. This will help prevent injury and. 4TEE3C10A1 That is excessivly loud. Design Engineer/Project Manager for injection molded plastic company So clearly, running your furnace blower on low is only more efficient IF-and-ONLY-IF the cost of the heating fuel is much much less then the cost of the electricity to run the blower that little bit faster. The blower speed for a gas heater is selected so that it is comfortable for the building occupant but also so that the Delta T (Temp Rise) does not continue to rise. Realizing this after a very long period of investigation, I eventually turned up the fan speed dial; this seemed to correct the problem initially, until one night a week later lying in bed I heard it do the same thing but but after a much longer run time. He is experienced in wood and metal construction, having designed and built several houses and metal buildings. A properly fitted filter can also trap unwanted, and oftentimes unseen, pollutants from the air in your home, including: Start with the return vent. I've already had a few HVAC vendors give me some specious arguments about moisture buildup, another even told me he'd "lose his license" if he touched the job. Most of these are on the bottom left of the control board. Related: a two stage furnace works by actually shooting less gas out, which might improve its efficiency. I'm not sure exactly the formula I'd use to normalize the results, but I'm pretty confident I could come up with some correlation if I had the data to play with. For business related inquires email us at. Secure the old speed wire by twisting a wire nut over the end. Trane. Now, I haven't done the measurement to learn how much electricity my blower uses on low vs high. http://www.inspectorsjournal.com/Forum/topic.asp?TOPIC_ID=8998&, We've added a "Necessary cookies only" option to the cookie consent popup. Cockroaches and waterbugs coming in through the vents was my big clue there. Copyright -The "Blower-on and Blower-off delay" time period can be selected. To learn more, see our tips on writing great answers. I simply am unable to put my hands on the schematic. Tools that we use: www.amazon.com/shop/acservicetech. On the motor, only one of the 5 numbered taps has 24v power at a time based on the speed desired at the control board. I'll just run the heat pump through the leaky ductwork and heat the crawl space. We welcome your comments and with a wiring harness for the fan. To start, ECM stands for Electronically Commutated Motor which means that the motor is capable of electronically controlling it's own speed, and therefore CFM, according to the desired output. The question is would the trade-off be in favor of less blower energy consumption and more loss through exhaust, or more blower energy consumption and less loss through exhaust. However, a higher MERV rating may not be best for your system. I'd like to get some second opinions.

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