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My heat is running cold! Be sure to check out our previous article on ", If you want to learn about refrigerants and how they work in a system, check out our. 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. These three are connected to the "Cool", "Heat", and "Fan" terminals on the control board. Black: High; Yellow: Medium-high ; Blue or brown: Medium-low; Red: Low; 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. What actually happened was that it caused the furnace to short cycle, running for about 4.5 minutes then shutting off and immediately turning on again over and over until it reached the set point. Step 2: Remove the panel cover of the furnace. I have a Trane Variable Speed Air Handler (TWE049E13FB2). Typical setups include these wire colors with associated blower speeds. 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. 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. Dave. Home House & Components Systems Heating & Cooling System Air Conditioners. DoItYourself.com, founded in 1995, is the leading independent All information is provided "AS IS." These two losses comprise the magnitude of heat losses. 01 - Trane Furnace Control Board. (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 "System Type" is the CFM per ton to be adjusted between low, normal and high. Remove two screws from each bracket leg holding the motor. But the 'real' one will be the one connected with a twist on cap to the fan motor. The only alternative is to raise the discharge temperature. 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. Stage 2 Aux Heating. View our Privacy Policy here. We are no longer supporting IE (Internet Explorer). What sort of strategies would a medieval military use against a fantasy giant? Variable Speed units continuously communicate with each other and your Trane thermostat to provide optimal efficiency. Step 3. Presently the settings for the cooling mode is speed 7 (C1.7), heating mode at speed 5 (H1.5), and continuous fan mode is set at the lowest speed (CF.1). Of course all that heat was lost because of the ridiculous number of vents in our foundation. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. Related: a two stage furnace works by actually shooting less gas out, which might improve its efficiency. The MERV rating is typically printed on the filter packaging, but not necessarily on the filter itself. You need to follow the wiring diagram inside the HVAC unit. Roughly 400 CFM is needed for every 1 ton (12,000 BTU/HR) of Heat Removal Capacity in Air Conditioning Systems. I.e., maybe more heat is now escaping through the exhaust. A properly fitted filter can also trap unwanted, and oftentimes unseen, pollutants from the air in your home, including: Start with the return vent. When you purchase through links on our site, we may earn commissions at no cost to you. In order to measure air flow you could use a flow capture hood, a rotating vane anemometer, or a hot wire anemometer. 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. (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. Remove the motor and mounting bracket. Cockroaches and waterbugs coming in through the vents was my big clue there. In terms of heat pumps, running the external blower faster may reduce i2r copper losses and hysteresis iron eddy current losses. The best answers are voted up and rise to the top, Not the answer you're looking for? The Trane XR80's heavy steel insulated cabinet has two benefits: Holds in more of the heat that you pay for Decreases operating noise Because of its heavy steel insulated cabinet, the XR80 can experience as little as 1% of air leakage. - Answered by a verified HVAC Technician . I think the best bet would be to actually test it for a few months and see. The noise is there in heat or AC. He is committed to outdoor cooking in a Bar-B-Q pit he welded together several years ago. Remember that CFM stands for Cubic Feet Per Minute. Move the high-speed wire to low. Make sure power is off when doing any adjustment. This will increase the number of air changes per hour (ACH) in the house and also help compensate for a more restrictive whole home air filter like a MERV 16 being installed. To begin, turn off the power to your furnace. 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. Proper duct sizing can resolve the issue you are having. Heres What It Means, Why You Should Monitor the Humidity Levels In Your Home. The furnace operates for two minutes or so before it shuts down. The video will also explain other safety measures, as well as some for a demonstration which I will show. If the furnace manufacturer supplies different burners for that unit you may be risking premature failure. with a wiring harness for the fan. The blower fan on this blower has four speeds. Since I first posted this thread, my installer called Trane to get an answer to my original question. 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. The BTU/HR capacity or tonnage of the air conditioning system should be included within the model number of the outdoor unit. These connected to (park) terminals, which are not used and simply hold those two additional wire speeds. Solution: Install a new sequencer AND a new fan relay, just to be safe. We are no longer supporting IE (Internet Explorer) as we strive to provide site experiences for browsers that support new web standards and security practices. I installed a Thermo Control 2000 boiler and first fired it up this Friday. Follow us on Facebook for Quick Tips and Updates here! Its time to clear the air. When he's not enjoying family time with his wife and three boys, he loves tinkering with projects and geeking out on electronics. On this motor module, the speed wires are red, orange, blue, yellow, and black. You may freely link This is NOT a user servicable item. It is important to know that you cant go by a normal color code to determine the speeds. Running your furnace fan all the time isn't exactly a bad thing. 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. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. On most control boards there will be a jumper that is marked to show that it controls the speed. 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. Top Ten Interview Tips to Land that HVAC/R Job! 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. It helps to have over 50 years of farming and ranching experience. Options are, for example, 4 minutes at 80%, or 30 seconds at 50%. If the ohm meter comes back with an open line reading, the switch is bad and needs replaced. Locate the speed wires. There are often five wire colors coming from your blower to your IFC. Remove the air handler. How to Lower the Ouptut of Oversized Furnace. The system also accounts for blocked vents and dirty furnace filters, and adjusts fan speed as needed to compensate. 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. Step 4: Take out the inducer motor. This will help prevent injury and. We welcome your comments and suggestions. Usually there will be three speeds ranging from 40 to 100% of airflow. 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. This is a follow-up to our other article on "Adjusting the Furnace/AC Airflow Speed on a 120v PSC Blower Motor". The fan speed is very low when not heating/cooling. Most furnaces have a relay switch on the door cover. That is incorrect. There are often five wire colors coming from your blower to your IFC. The control board has relays that regulate the voltage to each component in the furnace. you will get the better dehumidification with the lower setting. This helps the XR80 conserve more of the heat it produces. Design Engineer/Project Manager for injection molded plastic company The factory may only set two or three of these colors as actual speeds. The low pitched whine stops when fan is in high speed. But you will have a tough time measuring either on your basement Trane. Asking for help, clarification, or responding to other answers. Sign up for our email newsletter to learn helpful HVAC tips and tricks before your purchase your system. How does a furnace work? The airflow adjustments on this board are pictured below. It was working a week ago but just recently when it runs it blows out cold air. 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. It only takes a minute to sign up. The installation guide clearly describes how to set airflow for heating mode and cooling mode. Your new AC unit is not collecting water (yet) because the anticondensation coating hasn't been compromised (yet); and that's a good thing. 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. All Logos & Trademark Belongs To Their Respective Owners, Maintaining temperature over a longer period of time is more efficient than getting a room to temperature quickly, A lower fan speed ensures your heat pump will run for longer periods of time which is required for the system to go into whats called a defrost mode (. In the pictured example above, if the #5 speed tap is programmed for 1600 CFM and #4 is programmed for 1200 CFM and #5 is presently connected to the "Cool" terminal on the control board via the black wire, we know that the unit is running at around 1600 CFM as long as the TESP across the unit is not too high. Website operating It is a Trane S8X1 single stage furnace and air handler, paired with an XR16 3 ton AC unit. thanks in advance. Also, if you are looking for a video to better help understand this topic, check out our "Adjusting HVAC Blower Speed CFM on Furnace & AC Units!" My first thought was that the unit was oversized, but I figured out how to check the DIP switch settings. Can I retrofit a 2-speed or variable speed blower on a Payne PG8UAA forced air furnace? In other units, it may be 2, 3, and 4 that are programmed. When you open the panel, it kills the power to the furnace. (Heat transfer wasn't one of my favorite classes in college - I focused more on dynamic systems, sorry.). 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. The hot air will rise and heat the floor from beneath, a DIY form of radiant floor heating. and our 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. You may freely link to this site, and use it for non-commercial use subject to our terms of use. one room doesnt get as warm or as cool as the others. Step 3: Find the furnace draft inducer. How can I check before my flight that the cloud separation requirements in VFR flight rules are met? If the blower motor hums, check the blower fan to ensure that it spins freely. Additionally, they can be identified by the presence of a removable module/bell on the end of the motor. Turn off power at the main electric panel. However, a higher MERV rating may not be best for your system. 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). I know that it has been done. Before you begin this process it is a good idea to make sure that no power is going to the fan. 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. There is no mechanism to change this. 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. enjoys making jams and jellies during fruit season along with cooking meals. Making statements based on opinion; back them up with references or personal experience. 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. I was reading the Trane XL824 thermostat installation and setup manual. Most of these are on the bottom left of the control board. I just had a Trane system installed last week and I've been very happy with it! Because the slower air velocity over the heat element is transferring fewer BTU units into the circulated air and they simply go up the exhaust pipe. If you are having problems, find your fans users manual and use it as a guide. If the control board is at fault, replace it. 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. Cross country truck driver -- over dimensional freight The same is true when changing the air duct filter. My question was whether the efficiency of heat transfer thru the exchanger would be somewhat compromised due to the reduced airflow. Each is associated with a different blower speed. Trane XR80 Troubleshooting After examining the flashing system you should check the green light speed. (Without enclosing my house in a climate-controlled bubble). All rights reserved. There are several tutorials on Youtube about how to do this step for specific inducer motor brands. Recently I did a blower speed adjustment on the 2nd floor air handler and thought to show how it can be done. It would have no affect on the Heat settings. Which thermostat wires control the furnace fan? I suppose I probably won't do so it, but out of curiosity what kind of downside might one run into? Sometimes less cmf will give the air more time in the heat exchanger thus letting it get hotter. I have a Carrier furnace/heat pump with an expensive control thermostat that talks directly to the heat pump. Soak the filter in warm water in a bathtub or sink. To learn more, see our tips on writing great answers. Choose the Trane owner guide thats specific to your unit for detailed instructions on locating and changing yourairfilter. The ignitor glows. A continuous green light means the IFC circuit board needs replacing. Recently I did a blower speed adjustment on the 2nd floor air. Access the control board. You can verify the actual CFM by measuring the TESP of the system and comparing it to the manufacturer's airflow data sheet. I am currently heavily invested in studying and learning the subject as I commit myself to reducing my winter energy costs this year. For example, on a package unit, only taps 3, 4 and 5 may be programmed. We also have quick reference cards for use out in the field! Switch the Jumper On most control boards there will be a jumper that is marked to show that it controls the speed. Here are some of them: Better circulation of heated and cooled air. Upon initial installation, these dip switches need to be adjusted for the particular unit, size, and application. . It provides quieter and more even and comfortable heat than a conventional furnace and doesnt consume electricity unnecessarily. 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. Your R value shouldn't change, and daily average wind speed and precipitation should have a minimal effect on the convection coefficient. I have posted an inquiry under the Air Conditioning forum. Then, carefully switch it to the setting of your choice and push it back into the control board. The A/C will run according to the thermostat settings. When changing the AC or furnace filter, the arrow should face the furnace and point away from the return duct. Slowing the blower speed reduced the noise but I take it you would still like it to be more silent. A description of how to change motor speeds with a multiple speed fan motor on an IFC controlled furnace.This video is part of the heating and cooling series of training videos made to accompany my websites: www.graycoolingman.com and www.grayfurnaceman.com to pass on what I have learned in many years of service and repair. (FYI Filter was clean and furnace was recently serviced all prior to my initial investigation of the short cycling). These blower motor versions can be found in furnaces, air handlers, and packaged units. Bus Driver/Substitute Teacher Trane s9v2 should thermostat control blower speed? The blower energy draw at a lower speed will be offset by the loss in fan wheel inertia. It shouldn't take more than a few minutes a day to record the data anyway. 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. (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! STEP-BY-STEP REPLACEMENT GUIDE Turn off air conditioning / heat from the thermostat. - The "Continuous Fan" refers to when the G terminal is powered for the fan only to run. Slowly flashing shows your furnace is on and does not need heat. Using a hammer, lightly tap out the blower motor shaft (fig.6.7) to loosen the blower motor from the fan shroud (fig.6.8). This will help prevent injury and damage to the furnace fan. Carefully disconnect the wires from the coolant terminal, which is located on the back of the unit. 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. 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). How exactly could I test this? It had been set on the higher speed, but that was too harsh, so I lowered it to the slower speed. These are not switched off but are live all the time. I Tried a Hands-Free Dog Leash, and I No Longer Dread Walking My Dog, This Simple Trick Can Refresh Your Entire Home, 30 Spring Cleaning Tasks to Add to Your Checklist, Do not Sell or Share My Personal Information. I just moved into a house with a Trane XR80 furnace (several years old). Certified Welder One fan is inside the house, and one is outside the home. Copyright She has experience researching and creating a wide range of home improvement and garden projects, and especially enjoys learning about fireplaces and exterior design. The continuous fan is marked SW3. The manometer tells you the CFM number. The most important factor is temperature differential - the difference between the inside temperature and outside temperature. Then switch the jumper to your desired speed. home improvement and repair website. Wires from the 16 pin plug are connected to this board. After understanding what speed each tap is programmed for, we can make proper airflow adjustments. ASE Certified Master Auto Technician -The BTU/HR size is selectable between 48,000 42,000 36,000 or 30,000 BTU/HR. Switched it to heat (in which case the furnace board is in control of the fan, not the stat) - got fire, no fan. 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. After a bit of research, (translated: "mad google skills") I found an article claiming that lowering the blower speed may increase efficiency. He also builds custom tools for metal working. See our Privacy Policy for more information. Id check that out first. 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. These blower motor versions can be found in furnaces, air handlers, and packaged units. Check out www.acservicetech.com/store. Your AC or furnace is designed for a specific type of filter. If power is getting to the blower motor, but the motor does not run, the motor may be burned out. Press Apply to save and exit. It accounts for the amount of air in circulation for precision airflow. We recommend our users to update the browser. The heat exchanger can be overheated and burned out if the blower does not remove enough heat. There are two types of fan motors found in furnaces: 1.) I want to increase volume flow if possible. Mutually exclusive execution using std::atomic? Connect the black wire to the manometer. Stage 3 Aux Heating. A second filter location for most HVAC systems and furnaces is the air handler portion of the system. Euler: A baby on his lap, a cat on his back thats how he wrote his immortal works (origin?). Top 10 Spots! I know I need to replace a dying blower motor in a 1992 Trane XL80 gas furnace. 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. -The "Blower-on and Blower-off delay" time period can be selected. This furnace features the common White-Rodgers Intell-Ignition circuit board. Air Conditioner + Furnace Matched Systems, Air Conditioner + Air Handler Matched Systems, Does Your Air Conditioner Smell? Privacy Policy. Does that have any impact on the efficiency of the unit? Blower on delay settings, which evidently have an impact on the duration and speed of the blower fan. The MERV scale rates filters from 1 to 16. Now that its gotten cold, we've noticed that several of the heat register barely have any air coming out of them. He built every permanent building on his current homestead and did all the plumbing and electrical work. Where To Find R-22 & R410A Leaks on AC Units! Third-stage auxiliary heating for heat pumps and multi-stage furnaces. Connect and share knowledge within a single location that is structured and easy to search. 3.5 x 400 = 1400 CFM. Questions of a Do It Yourself nature should be I hope this helps you understand how to adjust the airflow speed on ECM Blower Motors! Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. I have a Trane XV90 propane furnace with a variable speed blower. Check back regularly as we are always updating and improving thiswebsite! At night with an . 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. Home Improvement Stack Exchange is a question and answer site for contractors and serious DIYers. The higher the MERV rating, the better the filter is at capturing specific pollutants from the air. BarnArtist, locate the wiring schematic on your furnace. AC Service Tech HVAC Training is made possible by continued support from our visitors, customers, and support from these Sponsors! No: you will not save on gas/oil costs by running your blower on low. The arrow should face the direction the air is flowing. This value is then multiplied by 150 cfm to obtain the required airflow for the furnace in heating operation. Iappreciate all the comments, questions, and responses that Ireceive from each of you. The blower motor also begins running, but at low rpm. On the furnace / air handler board you should have two wires on the "Y2" connection, assuming a two-stage cooling system. He farmed commercial garden produce for several years. 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. If the blower motor is burned out, replace it. As a side note, lowering furnace (heating) blower speed should apparently only be done if it doesn't reduce the "heat rise" (difference in temperature between the intake and supply air, if I understand it, also known as the "delta T") past the manufacturer recommended value for that furnace. There is another way to wire this, but I can not find it back.. The installation instructions for this furnace are needed in order to be able to know how to set these dip switches. A MERV rating speaks to the filters ability to capture large particles. 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. You will need to find the main cover panel on your fan. But, in looking up the manual for this furnace (TUD1B100A9361), it looks like there are 4 blower speeds. This will cause the "Cool" terminal on the control board to be connected to to the #4 terminal on the motor module via the black wire. Luci is a contributing writer for DoItYourself.com. To understand how this works, lets look at the wiring on your furnaces blower. 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. Thoroughly rinse the filter. Divide the rated Btu input by 10,000. Typically the colors are: White = neutral speed Red = low speed Yellow = medium speed Black = high speed Does a summoned creature play immediately after being summoned by a ready action? This lower blower speed enhances Learn more about Stack Overflow the company, and our products. Variable Speed Blower Motor (Genteq ECM 3.0, 4 pin connector). 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. Run a jumper from "R" to "Y2" and the blower will run continuously at the second-stage cooling speed. charts are usually found on the air handler inside door to controls. Here's hoping for some good answers. New XV80 Trane furnace makes noise when blower runs at low speed. Shay Tilander is a senior editor at Family Handyman. bean. These adjustments can be made by pulling the single wire connector and moving it to another single tab positioned horizontally in each row. Connect the common wire to the neutral terminal of the furnace's control board. Most homes have a standard split-system air conditioning unit with two main fans. Oil Furnaces may have a temp rise of 50-60F. The induction motor begins running.