The noise of forced air is annoying. The product data guide, and label on the inside panel indicate the air . Second-stage auxiliary heating for heat pumps and multi-stage furnaces. 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. A continuous green light means the IFC circuit board needs replacing. Luci is a contributing writer for DoItYourself.com. I guess you are talking about a 3 speed direct drive motor with 1/2 shaft. 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 have a Trane Variable Speed Air Handler (TWE049E13FB2). Check back regularly as we are always updating and improving thiswebsite! home improvement and repair website. The factory may only set two or three of these colors as actual speeds. 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. Please note that mounting bracket consists of top and bottom brackets joined by 6 metal screws (fig.6.9). The blower motor also begins running, but at low rpm. 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. 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. Example: 1200 CFM is needed for a 3 ton 36,000 BTU/HR system. 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. -The "Blower-on and Blower-off delay" time period can be selected. What sort of strategies would a medieval military use against a fantasy giant? The problem is, the furnace control module doesn't use a separate speed when the unit is running in continuous FAN mode. Select Climate from the blue menu on the left side of the page. During the awake hours I Hold the fan speed at either low or medium. It would have no affect on the Heat settings. Remove two screws from each bracket leg holding the motor. Switched it to heat (in which case the furnace board is in control of the fan, not the stat) - got fire, no fan. -The "AUX Heat" makes sure that there is enough airflow when elect strip heat is called. Select your preferred wire with the warm temperature and connect it to the 'heat' port. DoItYourself.com, founded in 1995, is the leading independent home improvement and repair website. These adjustments can be made by pulling the single wire connector and moving it to another single tab positioned horizontally in each row. Heat exchange takes time. Air Filters remove dust, lint, pet dander, and other pollutants so you can breathe easier knowing your indoor air quality is better with Trane. Where To Find R-22 & R410A Leaks on AC Units! Roughly 400 CFM is needed for every 1 ton (12,000 BTU/HR) of Heat Removal Capacity in Air Conditioning Systems. Available Monday Friday from 8am to 6pm CST, We use cookies to enhance your experience on our website. Tied from R to BK in air handler. When you purchase through links on our site, we may earn commissions at no cost to you. -The "AC/HP CFM Adjust" is the airflow volume to be set for system, efficiency, comfort. When your AC unit is working properly, the blower inside your furnace or AC will blow cold air.The cold air is sent through ducts to the living areas and then returns air to be cooled by the evaporator coil. Identify those arcade games from a 1983 Brazilian music video. Well, it does make sense that lowering the blower speed would reduce its electrical consumption. homininet 8 mo. Use tab to navigate through the menu items. I am currently heavily invested in studying and learning the subject as I commit myself to reducing my winter energy costs this year. Is it Covered Under Homeowners Insurance or a Home Warranty? 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. 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. 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. 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. I think the best bet would be to actually test it for a few months and see. You need to follow the wiring diagram inside the HVAC unit. Its not advisable to slow your furnace blower speed. 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. Recently I did a blower speed adjustment on the 2nd floor air. If the blower motor hums, check the blower fan to ensure that it spins freely. If you do, you may not have enough air flow over the heat exchanger, resulting in overheating and eventually a shorter exchanger life span. You may freely link Can a furnace with a variable speed blower be used in a multistory house? Which thermostat wires control the furnace fan? A 90 percent-plus furnace needs 150 cfm per 10,000 Btu of input. Third-stage auxiliary heating for heat pumps and multi-stage furnaces. Trane. This X-13 model shown above designates the speeds taps as numbers, not as colors, to denote each 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. HVAC filters help remove dust, dander, and harmful particles from the air inside your home. In support of this: I found the mfr owner's manual for my furnace and in it, it states, "if you have an air-conditioning coil installed, you should switch the furnace blower speed to high to accommodate the decreased air-flow caused by the cooling coil in the plenum.". On the furnace / air handler board you should have two wires on the "Y2" connection, assuming a two-stage cooling system. At night with an even lower set point I switch the fan speed to automatic. It had been set on the higher speed, but that was too harsh, so I lowered it to the slower speed. Black: High; Yellow: Medium-high ; Blue or brown: Medium-low; Red: Low; *Based on third party testing of particle removal efficiency down to 0.3 microns (2005). enjoys making jams and jellies during fruit season along with cooking meals. Shay Tilander is a senior editor at Family Handyman. HVAC system for small church has twin Trane XR90 units installed in 2009 to replace a unit with a much larger single blower. I think I had it on my hard drive, and the hard drive crashed on us last winter. When you open the panel, it kills the power to the furnace. We recommend our users to update the browser. No: you will not save on gas/oil costs by running your blower on low. To understand how this works, let's look at the wiring on your furnace's blower. If the Delta T continues to rise, this is due to low indoor airflow. 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 Then switch the jumper to your desired speed. how to change fan speed on furnace to get more heat from your unit HVAC STARTUP TECHNICIAN 4.6K views 1 year ago Trane XV80 or XC80 Variable Speed Motor Blower Fan Not Working - $9. But I'm reasonably sure it uses less to run on high vs low then it uses to run on low vs OFF. 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. I'm not completely convinced on this, since the claim is made by a company that sells variable speed blowers for retrofitting HVAC systems. On my furnace the schematic showed there were three speed settings. Follow us on Facebook for Quick Tips and Updates here! Note: (High voltage is always going to your blower motor along with the common for the 24 volts. The heat exchanger warms up the incoming air and a blower or air handler sends the warm air throughout the home. 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. Press Apply to save and exit. There are often five wire colors coming from your blower to your IFC. Cockroaches and waterbugs coming in through the vents was my big clue there. You should now see a red E icon in the System Mode screen next to Auto and Heating modes. This value is then multiplied by 150 cfm to obtain the required airflow for the furnace in heating operation. (Heat transfer wasn't one of my favorite classes in college - I focused more on dynamic systems, sorry.). and our This will help prevent injury and. So the blower motor is dead. This lower blower speed enhances PSC - The Permanent Split Capacitor Motor is still the most commonly used. Most of these are on the bottom left of the control board. Now that would turn the blower speed down on you. The furnace operates for two minutes or so before it shuts down. The blower is set for 400 cfm for a 4 ton outdoor unit, and comfort-R is not enabled (all factory). Invention prototypes are another of his many accomplishments. In terms of heat pumps, running the external blower faster may reduce i2r copper losses and hysteresis iron eddy current losses. 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. 80% would be great for me. How to change the fan motor speed on a gas furnace grayfurnaceman 148K subscribers Subscribe 190K views 10 years ago Furnace blowers A description of how to change motor speeds with a. 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. 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. When the humidity is high for what its set at. Locate the speed wires. I simply am unable to put my hands on the schematic. For example, on a package unit, only taps 3, 4 and 5 may be programmed. Connect the black wire to the manometer. Western VA. Nov 28, 2009. Identify the blower fan and the speed wires. 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. bean. It only takes a minute to sign up. A slim, removable cover will reveal the filter location. Why do many companies reject expired SSL certificates as bugs in bug bounties? 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 house has a 3 ton trane xl20i and an xv80 (4 ton max). I have also measured that on low speed my furnace requires AT-LEAST 1 hour of constant running to raise my home temp by 6 deg F. On high speed it takes 30-40 min. Iappreciate all the comments, questions, and responses that Ireceive from each of you. However, they are limited based on the total external static pressure (TESP) in the duct. These connected to (park) terminals, which are not used and simply hold those two additional wire speeds. So How Do We Adjust Fan Speed? Yes, there is a way to bring up the speed on the air handler.. 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. You have to switch the wires to the blower motor. To learn more, see our tips on writing great answers. When it is flashing fast there is heat throughout your home. Remember that CFM stands for Cubic Feet Per Minute. The following list refers to each adjustment starting from the bottom and moving upward. According to the company, the slower circulation speed reduces energy consumption by 75%. Carefully disconnect the wires from the coolant terminal, which is located on the back of the unit. I'll edit my answer and include the exact parameters I'd record every day for a thorough study. DoItYourself.com, founded in 1995, is the leading independent He is also an HVACR Contracting Business owner of 16 years and holds an NJ HVACR Master License. I understand the reason for slowing the air to remove humidity. I miscalculated. If you know what you are doing, it is very simple to adjust the speed of your furnace fan. This can be done through an independent dehumidistat or through a thermostat's DEHUM terminal (if available). Continue reading to learn how to lower the fan speed. Cookie Notice 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 . But the 'real' one will be the one connected with a twist on cap to the fan motor. Once you have located the panel, remove it. I was reading the Trane XL824 thermostat installation and setup manual. On most control boards there will be a jumper that is marked to show that it controls the speed. By clicking '. I assume you are speaking about dip switch settings. 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. 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. Website operating That is incorrect. -The BTU/HR size is selectable between 48,000 42,000 36,000 or 30,000 BTU/HR. Make sure power is off when doing any adjustment. Adjusting the Airflow Speed on ECM Blower Fan Motors! The continuous fan is marked SW3. The blower/fan seems to be running way to fast. If you have not read that yet, I would encourage you to do so! The most important factor is temperature differential - the difference between the inside temperature and outside temperature. Now, I haven't done the measurement to learn how much electricity my blower uses on low vs high. A 1.5 ton AC unit may not be large enough to cool the . Air filters are measured by Minimum Efficiency Reporting Values (MERV). 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. When changing the AC or furnace filter, the arrow should face the furnace and point away from the return duct. air flow is inadequate to match demand and duct size. 01 - Trane Furnace Control Board. Disconnect between goals and daily tasksIs it me, or the industry? Batch split images vertically in half, sequentially numbering the output files, Using indicator constraint with two variables. 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. American Standard air handler troubleshooting (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. Thanks for contributing an answer to Home Improvement Stack Exchange! Cut the wire's terminal connector off with wire cutters. All information is provided "AS IS." The wires are several different colors. On this motor module, the speed wires are red, orange, blue, yellow, and black. There is another way to wire this, but I can not find it back.. Slowly flashing shows your furnace is on and does not need heat. There are also red and brown furnace speed wires. Again, this can usually be found in the upper-left corner. Bus Driver/Substitute Teacher 3 of the wires will likely terminate with just a twist on cap. 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. A second filter location for most HVAC systems and furnaces is the air handler portion of the system. . 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. 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. Options are, for example, 4 minutes at 80%, or 30 seconds at 50%. The video will also explain other safety measures, as well as some for a demonstration which I will show. For homeowners who want to upgrade rather than replace an existing furnace, Emerson Electric offers an exclusive replacement blower motor called the Mark Z that can be set by the homeowner on a continuous, slower-than-normal speed. 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. 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. You need to find the wires that determine blower speed inside your furnace. The control board is communicating with the blower module in order to determine the airflow volume needed. We welcome your comments and suggestions. Variable Speed Blower Motor (Genteq ECM 3.0, 4 pin connector). Remove the air handler. Use dish soap and a soft-bristle brush or sponge to remove stuck-on debris. These are not switched off but are live all the time. When the R-G circuit is made, the blower motor operates on heating speed. Since hot air is much lighter . The installation guide clearly describes how to set airflow for heating mode and cooling mode. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. He has several years experience as a professional cabinet builder, and he is an accomplished auto repairman, having operated an auto repair business for many years. The ohm meter should read very close to zero. The BTU/HR capacity or tonnage of the air conditioning system should be included within the model number of the outdoor unit. The manual document include instructions and informations on how to troubleshoot the system. Locate your thermostat on the page and click System Mode. 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. - The "Continuous Fan" refers to when the G terminal is powered for the fan only to run. 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. The MERV rating is typically printed on the filter packaging, but not necessarily on the filter itself. 1995-2023 MH Sub I, LLC dba Internet Brands. 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. We also have quick reference cards for use out in the field! It is about 1300-1400 sq feet, but then the basement was finished at some point, more or less doubling the square footage. On this board, pins 3, 4, and 5 on the SW1/1 through SW1/8 dip switch block have to do with air flow. 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. CFM stands for "cubic feet per minute." Thanks for all your continued support! Making statements based on opinion; back them up with references or personal experience. Most homes are best served by a filter with a MERV rating of 8 to 13, but refer to your system's user manual or with a Trane employee for guidance. 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. The higher the MERV rating, the better the filter is at capturing specific pollutants from the air. It offers three settings: 525 RPM for saving energy, 900 RPM for heating, or 1100 RPM for air conditioning. If the ohm meter comes back with an open line reading, the switch is bad and needs replaced. Mine has a wall switch. If the blower motor is burned out, replace it. Blower on delay settings, which evidently have an impact on the duration and speed of the blower fan. Proper returns are rarely a thought. 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. Typical setups include these wire colors with associated blower speeds. Additionally, they can be identified by the presence of a removable module/bell on the end of the motor. It was working a week ago but just recently when it runs it blows out cold air. Example: Rated Btu Input = 60,000 / 10,000 = 6 x 150 = 900 cfm of required furnace airflow. I'm not in enhanced mode. In order to measure air flow you could use a flow capture hood, a rotating vane anemometer, or a hot wire anemometer. I know I need to replace a dying blower motor in a 1992 Trane XL80 gas furnace. Privacy Policy. This covers speed adjustment on a PSC motor. 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. The wire's color will determine the speed settings that the motor will run at. you will get the better dehumidification with the lower setting. Divide the rated Btu input by 10,000. 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. 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. 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 that when it is in enhanced mode the fan only runs at 50%, you can try changing your dip switches to see. Can you increase the speed of an ECM AC blower? If power is getting to the blower motor, but the motor does not run, the motor may be burned out. low would be 350 CFMs/ton, medium 400 CFMs/ton, high 450 CFMs/ton. This helps the XR80 conserve more of the heat it produces. 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! the module must be a trane furnace model specific programmed and is available separate from the motor. Now that its gotten cold, we've noticed that several of the heat register barely have any air coming out of them. They do this by coupling a sophisticated, programmable thermostat to a variable-speed motor. Turn off the power source that is connected to the furnace blower. Mine. I know that it has been done. with a wiring harness for the fan. Tools that we use: www.amazon.com/shop/acservicetech. Secure the old speed wire by twisting a wire nut over the end. Click System Options. Most furnaces have a relay switch on the door cover. There are several tutorials on Youtube about how to do this step for specific inducer motor brands. The best answers are voted up and rise to the top, Not the answer you're looking for? Note also that there is always just "one blower" but that blower may or may not be variable speed, etc. I installed a Thermo Control 2000 boiler and first fired it up this Friday. I thought of a way to prevent the nasty smell been coming through the vents, keep the cockroaches and rats out, and heat the house without having to go down and repair the ductwork, all at the same time: seal up the foundation vents with insulation and replace the thermostat with a remote bulb thermostat locating the sensor under the house. The ignitor glows. The airflow adjustments on this board are pictured below. The arrow should point toward the unit. You can change the settings for cfm fan speed, but you have to do it manually at the board. He has been DIY since childhood and is now a septuagenarian. Can this be adjusted Connect the common wire to the neutral terminal of the furnace's control board. Wires from the 16 pin plug are connected to this board. It allows three constant fan speeds as well as an automatic fan speed and a variable burn rate and compressor and fan speed. 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. Measured the temperature of the air before the coil and after the coil and used DeltaT (change in temperature) to determine the blower setting. 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. It wasn't the noise that was bothering me, it was the desert-like sensation of swirling dry air. He built every permanent building on his current homestead and did all the plumbing and electrical work. Match the positions to the desired pictures within the manufacturer's installation literature. Stage 3 Aux Heating. Usually there will be three speeds ranging from 40 to 100% of airflow. The NET difference of the above two figures is your savings or cost. 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. Each is associated with a different blower speed. View our Privacy Policy here. During the awake hours I Hold the fan speed at either low or medium.