how to change fan speed on a trane furnace how to change fan speed on a trane furnace

The wires are several different colors. This helps the XR80 conserve more of the heat it produces. He maintains fruit and nut trees along with helping his wife with a vegetable garden. Recently I did a blower speed adjustment on the 2nd floor air handler and thought to show how it can be done. 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 Note: (High voltage is always going to your blower motor along with the common for the 24 volts. Asking for help, clarification, or responding to other answers. This trick only works on gas furnace systems with a multi-speed blower. How to change blower speed on furnace - Trane XB 2018 Ryan W 794 subscribers Subscribe 185 44K views 4 years ago A quick description on how to change the blower speed on your furnace. I assume you are speaking about dip switch settings. Wires from the 16 pin plug are connected to this board. Especially with a high efficiency furnace, however, it may be that the decreased electric bill saves enough to offset the "loss up the flue" not sure. We are no longer supporting IE (Internet Explorer). If you have a plug instead (ECM Broad Ocean) you can only make the adjustment at the control board or at the plug terminals at the end of the wiring. In order for the filter to work properly, the right size is crucial. submitted to our "DoItYourself.com Community Forums". The boiler is feeding a DHW sidearm and furnace plenum HX. You should now see a red E icon in the System Mode screen next to Auto and Heating modes. No: you will not save on gas/oil costs by running your blower on low. (Variable & Multi-Speed Types), In this HVAC training article, we will be discussing how to adjust the fan speeds on an indoor, In order to measure air flow you could use a flow capture hood, a rotating vane anemometer, or a, I hope this helps you understand how to adjust the airflow speed on ECM Blower Motors! All information is provided "AS IS." Trane XR80 Troubleshooting After examining the flashing system you should check the green light speed. The S8X1 blower has 9 speeds. Tied from R to BK in air handler. Learn more about Stack Overflow the company, and our products. Can a furnace with a variable speed blower be used in a multistory house? Remove battery from the thermostat (or disconnect thermostat altogether). To ensure our content is always up-to-date with current information, best practices, and professional advice, articles are routinely reviewed by industry experts with years of hands-on experience. The SW2 indicates the air conditioning size. Remove both of these wires and wire nut them together. If the furnace manufacturer supplies different burners for that unit you may be risking premature failure. Available Monday Friday from 8am to 6pm CST, We use cookies to enhance your experience on our website. charts are usually found on the air handler inside door to controls. On this board, pins 3, 4, and 5 on the SW1/1 through SW1/8 dip switch block have to do with air flow. 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. 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 . H.R. I'll just run the heat pump through the leaky ductwork and heat the crawl space. Step 3: Adjust the Pulley on the Blower Drive Motor By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. with a wiring harness for the fan. Comfort R should be off if you are using . 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. This covers speed adjustment on a PSC motor. You may freely link The remaining colored wires will be default speeds. You have to switch the wires to the blower motor. If the instructions are not with the furnace, you can look up the model number of the unit and search for the installation manual via a google search. Iappreciate all the comments, questions, and responses that Ireceive from each of you. Slowing the blower speed reduced the noise but I take it you would still like it to be more silent. First, make sure that power is getting to the motor. Other than removing the module and seeing burnt components it must be diagnosed by a professional with a techmate tool ( allows you to test the motor and module and determine cause of error). Should I upgrade to a pcm br compatible thermostat? A MERV rating speaks to the filters ability to capture large particles. So if you are actually moving 1250 CFM then you are at 357 CFM/ton, which is a good setup for dehumidifying. The factory may only set two or three of these colors as actual speeds. Here are common Trane AC repairs not listed in the guide and their repair cost for parts and labor: Leaking coil and refrigerant: $1,150-$1,750 Thermostatic expansion valve (TXV): $275-$450 Compressor and refrigerant (after ten years, typically): $1,150-$1,600 Failed solder connection on refrigerant lines and refrigerant: $875-$1,220 The wire's color will determine the speed settings that the motor will run at. Filters help protect the many parts of your heating and cooling unit from debris and buildup that can shorten the working life of the system. 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. The BTU/HR capacity or tonnage of the air conditioning system should be included within the model number of the outdoor unit. Copyright 1995-document.write(new Date().getFullYear()) MH Sub I, LLC dba Internet Brands. We also have quick reference cards for use out in the field! and as I recall, you have the HW VP IAQ stat. Questions of a Do It Yourself nature should be They do this by coupling a sophisticated, programmable thermostat to a variable-speed motor. All rights reserved. How to tell which packages are held back due to phased updates, Linear Algebra - Linear transformation question. Turn off the emergency HVAC shutoff switch Remove top and bottom cover panels on the air handler / furnace unit (fig.5.1). At night with an even lower set point I switch the fan speed to automatic. The control board has relays that regulate the voltage to each component in the furnace. A continuous green light means the IFC circuit board needs replacing. The system also accounts for blocked vents and dirty furnace filters, and adjusts fan speed as needed to compensate. Related: a two stage furnace works by actually shooting less gas out, which might improve its efficiency. I'm not in enhanced mode. The real fix is to add insulation and install a second system on the second floor of most recently constructed homes with an adequate number of true ducted returns as opposed to the leaking stud-space returns contractors are so fond of. I have been reading that the br wire can be used to let the thermostat control the fan speed, or the furnace itself can be programmed to ramp up the fan speed. The noise of forced air is annoying. So How Do We Adjust Fan Speed? Most of these are on the bottom left of the control board. So I continued to play around with different combinations tonight. 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. (FYI Filter was clean and furnace was recently serviced all prior to my initial investigation of the short cycling). The ohm meter should read very close to zero. The installation instructions for this furnace are needed in order to be able to know how to set these dip switches. #3. Allow the filter to completely dry before returning it to the device. 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. 01 - Trane Furnace Control Board. I have a Trane Variable Speed Air Handler (TWE049E13FB2). When changing the AC or furnace filter, the arrow should face the furnace and point away from the return duct. I think that when it is in enhanced mode the fan only runs at 50%, you can try changing your dip switches to see. STEP-BY-STEP REPLACEMENT GUIDE Turn off air conditioning / heat from the thermostat. If your home has multiple HVAC systems, there will likely be at least one air filter for each unit. *NOTE* If you attempt this, be absolutely sure that you have no power going to your system, especially before changing wires. Follow us on Facebook for Quick Tips and Updates here! Remember that CFM stands for Cubic Feet Per Minute. 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. I installed a Thermo Control 2000 boiler and first fired it up this Friday. Most residential furnaces were installed by the low bidder. American Standard air handler troubleshooting Any takers? On the furnace / air handler board you should have two wires on the "Y2" connection, assuming a two-stage cooling system. 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. 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. The arrow should face the direction the air is flowing. Remove two screws from each bracket leg holding the motor. HVAC system for small church has twin Trane XR90 units installed in 2009 to replace a unit with a much larger single blower. Here's hoping for some good answers. XB Trane Furnace: Is there a fan speed control on the unit. This X-13 model shown above designates the speeds taps as numbers, not as colors, to denote each speed. Being an bms/controls guy I rarely have enough cfm in large buildings. -The "System Type" is the CFM per ton to be adjusted between low, normal and high. Soak the filter in warm water in a bathtub or sink. To recap: The service technician might be able to increase (or decrease) the blower speed, but that would probably lower the AC's cooling efficiency. There is no mechanism to change this. AC Service Tech HVAC Training is made possible by continued support from our visitors, customers, and support from these Sponsors! The remaining colored wires are the speed selectors for this blower motor.). It only takes a minute to sign up. (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.) I'm in the process of re-wiring my blower to run on high with the furnace. Since I first posted this thread, my installer called Trane to get an answer to my original question. Stage 3 Aux Heating. The arrow should point toward the unit. Cross country truck driver -- over dimensional freight It provides quieter and more even and comfortable heat than a conventional furnace and doesnt consume electricity unnecessarily. Can airtags be tracked from an iMac desktop, with no iPhone? Making statements based on opinion; back them up with references or personal experience. If the terminals are present at the motor module (ECM X-13) you can switch speeds at the blower motor location. You can verify the actual CFM by measuring the TESP of the system and comparing it to the manufacturer's airflow data sheet. . - The "Continuous Fan" refers to when the G terminal is powered for the fan only to run. Note also that there is always just "one blower" but that blower may or may not be variable speed, etc. (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. The air handler houses the fan and fan motor and is usually located in the basement or attic. I simply am unable to put my hands on the schematic. One of these wires will be coming from the thermostat and the other will go to the outside unit. Match the positions to the desired pictures within the manufacturer's installation literature. Example: Rated Btu Input = 60,000 / 10,000 = 6 x 150 = 900 cfm of required furnace airflow. This value is then multiplied by 150 cfm to obtain the required airflow for the furnace in heating operation. 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. Euler: A baby on his lap, a cat on his back thats how he wrote his immortal works (origin?). Thus, my blower can't be using that much electricity on high. And I'd guess you're not supposed to push it too close to the limits as things may change slightly over time (filter will get dirtier, blades dirtier). If the blower motor hums, check the blower fan to ensure that it spins freely. 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 suppose I probably won't do so it, but out of curiosity what kind of downside might one run into? There is no humidistat. 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. Switch the power back on and test it. In his particular case it was "too much volume" of air so I presume just moving air filters isn't enough (typically you'd need to adjust blower level AFAICT). He is committed to outdoor cooking in a Bar-B-Q pit he welded together several years ago. A MERV 16 filters particles at a level near that or a HEPA. allows the furnace's circulator blower to operate at a slightly lower speed (85% of desired speed) during a combined thermostat call for cooling and dehumidistat call for dehumidification. I'm not completely convinced on this, since the claim is made by a company that sells variable speed blowers for retrofitting HVAC systems. bean. The house has a 3 ton trane xl20i and an xv80 (4 ton max). The system might not work properly. You could also use the Temp Rise Formula which you can learn about in our "HVAC Temp Rise Formula used to Measure Airflow CFM" video. You will need to look at what the programmed speed designations are for M1/M2/M3/M4/M5 on the wiring diagram of the HVAC unit. A second filter location for most HVAC systems and furnaces is the air handler portion of the system. Air Filter - Be sure to check the air filter and replace if necessary. The wires that are used will determine the speed settings that the motor will run at. H.R. If you want to learn about refrigerants and how they work in a system, check out our Refrigerant Charging and Service Procedures for Air Conditioning book . I guess you are talking about a 3 speed direct drive motor with 1/2 shaft. 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. Air filters are typically found behind the return vent door, often located in the ceiling or wall in the central portion of your home. When the system calls for heat and the inducer fan begins to run, check each pressure switch terminal. Which thermostat wires control the furnace fan? The A/C will run according to the thermostat settings. One of these wires will be coming from the thermostat and the other will go to the outside unit. Access the control board. It was working a week ago but just recently when it runs it blows out cold air. rev2023.3.3.43278. The blower motor also begins running, but at low rpm. Yes--the efficiency of the heat exchanger will decrease. Why is there a voltage on my HDMI and coaxial cables? Continue reading to learn how to lower the fan speed. If the control board is at fault, replace it. DoItYourself.com, founded in 1995, is the leading independent 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. In humid climates, 350 CFM per ton can be selected in order to remove more moisture from the air. The low pitched whine stops when fan is in high speed. That is incorrect. The company offers a variety of furnaces to suits the needs of every home. 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. Recently I did a blower speed adjustment on the 2nd floor air. The automatic feature rarely kicks in once at set point. Copyright I have a Carrier furnace/heat pump with an expensive control thermostat that talks directly to the heat pump. When changing the AC or furnace filter, the arrow should face the furnace and point away from the return duct. (Variable & Multi-Speed Types) In this HVAC training article, we will be discussing how to adjust the fan speeds on an indoor ECM variable speed blower motor and an ECM constant torque/multi-speed blower motor. Typical setups include these wire colors with associated blower speeds. Cookie Notice Disconnect between goals and daily tasksIs it me, or the industry? Check out our free Quizzes to test your knowledge here! The automatic feature rarely kicks in once at set point. This lower blower speed enhances Only swap these two wires. 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. The blower energy draw at a lower speed will be offset by the loss in fan wheel inertia. I know I need to replace a dying blower motor in a 1992 Trane . air flow is inadequate to match demand and duct size. Mine has a wall switch. When one of the taps is powered with 24v, the motor will turn on and run at the selected speed. . No need for direct trane replacment motor. Each is associated with a different blower speed. Most homes have a standard split-system air conditioning unit with two main fans. By clicking '. 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. I think the best bet would be to actually test it for a few months and see. @Dave: Those were my thoughts as well. If power is getting to the blower motor, but the motor does not run, the motor may be burned out. BarnArtist, locate the wiring schematic on your furnace. Therefore I again adjusted the speed upward a bit and that seemingly has corrected the problem. The MERV scale rates filters from 1 to 16. This will allow you to access the control board. These blower motor versions can be found in furnaces, air handlers, and packaged units. Connect the ohm meter to the pressure switch. The NET difference of the above two figures is your savings or cost. If the blower motor is burned out, replace it. Please note that mounting bracket consists of top and bottom brackets joined by 6 metal screws (fig.6.9). The gas is shut off and the induction motor stops running while the blower . Step 4: Take out the inducer motor. Then switch the jumper to your desired speed. 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. All information is provided "AS IS." This will help prevent injury and. Its not advisable to slow your furnace blower speed. 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). The only alternative is to raise the discharge temperature. The house cools off quick - too quick - and feels humid (not sure of the rh%). It is a Trane S8X1 single stage furnace and air handler, paired with an XR16 3 ton AC unit. During "Fan On", the fan runs at 50% of whatever the maximum speed of the fan is. Connect the common wire to the neutral terminal of the furnace's control board. 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. These blower motor speeds are programmed at the manufacturer's factory for the specific equipment model number unit it is installed in. Privacy Policy. R and BK are tied together. the module must be a trane furnace model specific programmed and is available separate from the motor. The furnace operates for two minutes or so before it shuts down. I could imagine possibly fewer "warm up cycles" (which also include having to power on the fan) might save something (as well as lower fan speed=less electricity)but as others have noted, while its running (esp. Variable Speed units continuously communicate with each other and your Trane thermostat to provide optimal efficiency. 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. Luci is a contributing writer for DoItYourself.com. A dirty air filter can cause your HVAC system to go into overdrive and result in costly energy bills. This is an old thread but I am going to post my experience: I have an oil furnace, at some point someone (a furnace tech) adjusted the blower to run slower thinking it would provide more hot air by slowing the air to heat up more before supplying the house. When it is flashing fast there is heat throughout your home. Radiant floor heat web sites are mysteriously silent on this simple and cheap modification of pre-exisiting systems to accomplish the same goal. Oil Furnaces may have a temp rise of 50-60F. However, if your HVAC blower motor isn't too badly damaged, the technician may be able to clean and repair it so you won't have to incur the cost of a replacement. http://www.inspectorsjournal.com/Forum/topic.asp?TOPIC_ID=8998&, We've added a "Necessary cookies only" option to the cookie consent popup. If you are a homeowner looking to repair your own appliance, understand that the voltages can be lethal, the fuels are highly flammable and high pressures are used. 1 to 1.5 hours | Install the new motor, adjust it (multispeed and variable speed blowers only), run and test the furnace Installing a blower wheel with the motor shouldn't affect installation time, since the old wheel typically has to be removed to replace the motor. Certified Welder However, a higher MERV rating may not be best for your system. Typically the colors are: White = neutral speed Red = low speed Yellow = medium speed Black = high speed Fortunately, theres a simple fix if you look at your furnaces Integrated Furnace Control (IFC) board. -The "AC/HP CFM Adjust" is the airflow volume to be set for system, efficiency, comfort. In the example above, an ECM 2.3 16 pin variable speed motor is connected to an air handler control board. Stage 2 Aux Heating. In order to measure air flow you could use a flow capture hood, a rotating vane anemometer, or a hot wire anemometer. Use dish soap and a soft-bristle brush or sponge to remove stuck-on debris. Also related, with for instance a variable speed furnace, since it runs continuously and reduces "cold spots" you might find you can set it at a lower degree setting than the off/on kind. Are there downsides to this. Your AC or furnace is designed for a specific type of filter. To begin, turn off the power to your furnace. suggestions. When he's not enjoying family time with his wife and three boys, he loves tinkering with projects and geeking out on electronics. But you will have a tough time measuring either on your basement Trane. Be sure to check out our previous article on "Adjusting the Furnace/AC Airflow Speed on a 120v PSC Blower Motor" if you haven't read it yet! It is important to know that you cant go by a normal color code to determine the speeds. There are also red and brown furnace speed wires. Check out www.acservicetech.com/store. I have a Trane XV90 propane furnace with a variable speed blower. *Based on third party testing of particle removal efficiency down to 0.3 microns (2005). I'm getting a new s9v2. you will get the better dehumidification with the lower setting. 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. I have another question about my new Trane XV95 Furnace. 1995-2023 MH Sub I, LLC dba Internet Brands. Most furnaces have a relay switch on the door cover. In the example of an ECM 3.0 with a 4 pin connector, the wires are not switched or moved to adjust the airflow settings. ago. To understand how this works, let's look at the wiring on your furnace's blower. I'd like to get some second opinions. No problem with the boiler. The variable speed furnace delivers the proper amount of airflow based on the heating and cooling needs of your home. 10 Reasons a Blower Fan Won't Start in a Furnace, AC or Heat Pump. How do I check if this furnace switch the blower to second speed. Once you have located the panel, remove it. He also builds custom tools for metal working. Using a filter that's too small or too large will allow debris particles to pass into the HVAC unit, potentially damaging or blocking the system. How does a furnace work? The product data guide, and label on the inside panel indicate the air . In the manual, it lists some settings, e.g. homininet 8 mo. To help ensure you're breathing healthier air and supporting your heating and cooling system to operate at an optimal level, follow the simple steps in this video to change your furnace filter assuggested. The arrow should face the direction the air is flowing. Switch the Jumper On most control boards there will be a jumper that is marked to show that it controls the speed. In a gas furnace, (the most common type of furnace used in homes) natural gas is ignited in the burner and the flames heat up the heat exchanger. The MERV rating is typically printed on the filter packaging, but not necessarily on the filter itself. This will show what speed each numbered tap is programmed as. But, in looking up the manual for this furnace (TUD1B100A9361), it looks like there are 4 blower speeds. Remove both of these wires and wire nut them together. Its a common occurrence in the heat of the summer or the cold of the winter one room doesnt get as warm or as cool as the others. Yes: you will save electricity costs by running your blower on low. Website operating problems contact Webmaster. It is about 1300-1400 sq feet, but then the basement was finished at some point, more or less doubling the square footage. Test your knowledge with our 1,000 question workbook along with the answer key! We recommend our users to update the browser. If you know what you are doing, it is very simple to adjust the speed of your furnace fan. The gas kicks on and is lit by the ignitor. The heat exchanger warms up the incoming air and a blower or air handler sends the warm air throughout the home. Standard blower motors operate at a single speed and cost around $450 to replace, including parts and labor, while variable-speed motors cost $600 and up. Test the new speed. - Answered by a verified HVAC Technician . one room doesnt get as warm or as cool as the others. View our Privacy Policy here. The manual document include instructions and informations on how to troubleshoot the system.