how to change fan speed on a trane furnace

This furnace features the common White-Rodgers Intell-Ignition circuit board. The air handler houses the fan and fan motor and is usually located in the basement or attic. Website operating Click On under Emergency Heat. . These two losses comprise the magnitude of heat losses. Dave. Click System Options. The BTU/HR capacity or tonnage of the air conditioning system should be included within the model number of the outdoor unit. The fan speed is very low when not heating/cooling. It allows three constant fan speeds as well as an automatic fan speed and a variable burn rate and compressor and fan speed. (Without enclosing my house in a climate-controlled bubble). 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 NET difference of the above two figures is your savings or cost. Step 4: Take out the inducer motor. Our Privacy Policy governs the use of your information. Locate the speed wires. For example, on a package unit, only taps 3, 4 and 5 may be programmed. The fan speed is controlled on the control board for the furnace. 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. The company offers a variety of furnaces to suits the needs of every home. Narrowing that hysteresis loop will: Leading to a smaller Hysteresis loop, increasing motor efficiency by reducing iron eddy current losses. Compatible with Trane systems or any standard HVAC system. -The BTU/HR size is selectable between 48,000 42,000 36,000 or 30,000 BTU/HR. Another common place with a schematic is on the back of the blower fan door. 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 arrow should face the direction the air is flowing. I was reading the Trane XL824 thermostat installation and setup manual. Mine has a wall switch. I have a Trane Variable Speed Air Handler (TWE049E13FB2). 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. When you purchase through links on our site, we may earn commissions at no cost to you. My main questions are. I needed to go the opposite direction and increase fan speed. He is committed to outdoor cooking in a Bar-B-Q pit he welded together several years ago. Once you have located the panel, remove it. At night with an . HVAC filters help remove dust, dander, and harmful particles from the air inside your home. I think that when it is in enhanced mode the fan only runs at 50%, you can try changing your dip switches to see. It is important to know that you cant go by a normal color code to determine the speeds. (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. If you remove the common and place it on another terminal, it can burn out your motor not how you want the new furnace season to begin. #3. Check out www.acservicetech.com/store. CFM stands for "cubic feet per minute." Options are, for example, 4 minutes at 80%, or 30 seconds at 50%. I connected a second thermostat to the circuit board to run the blower (R to G). The blower motor also begins running, but at low rpm. Trane s9v2 should thermostat control blower speed? Each is associated with a different blower speed. Each is associated with a different blower speed. 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). This trick only works on gas furnace systems with a multi-speed blower. I just had a Trane system installed last week and I've been very happy with it! This will help prevent injury and damage to the furnace fan. Now, I haven't done the measurement to learn how much electricity my blower uses on low vs high. 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. 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! By accepting all cookies, you agree to our use of cookies to deliver and maintain our services and site, improve the quality of Reddit, personalize Reddit content and advertising, and measure the effectiveness of advertising. For more information, please see our When you open the panel, it kills the power to the furnace. Home House & Components Systems Heating & Cooling System Air Conditioners. The gas is shut off and the induction motor stops running while the blower . 01 - Trane Furnace Control Board. air flow is inadequate to match demand and duct size. Air Conditioner + Furnace Matched Systems, Air Conditioner + Air Handler Matched Systems, Does Your Air Conditioner Smell? 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. I have posted an inquiry under the Air Conditioning forum. How exactly could I test this? I'd like to get some second opinions. But, in looking up the manual for this furnace (TUD1B100A9361), it looks like there are 4 blower speeds. If the blower motor hums, check the blower fan to ensure that it spins freely. If the ohm meter comes back with an open line reading, the switch is bad and needs replaced. When changing the AC or furnace filter, the arrow should face the furnace and point away from the return duct. 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. 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. We have been heating the crawl space in our house for several winters because the ductwork was all torn up from rats. 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. Wires from the 16 pin plug are connected to this board. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. Since I first posted this thread, my installer called Trane to get an answer to my original question. If you are having problems, find your fans users manual and use it as a guide. No need for direct trane replacment motor. If power is getting to the blower motor, but the motor does not run, the motor may be burned out. Therefore I again adjusted the speed upward a bit and that seemingly has corrected the problem. I know I need to replace a dying blower motor in a 1992 Trane XL80 gas furnace. The blower is set for 400 cfm for a 4 ton outdoor unit, and comfort-R is not enabled (all factory). Connect and share knowledge within a single location that is structured and easy to search. Switch the Jumper On most control boards there will be a jumper that is marked to show that it controls the speed. The heat exchanger can be overheated and burned out if the blower does not remove enough heat. - Answered by a verified HVAC Technician . My heat is running cold! Craig is a licensed Teacher of HVACR, Sheet Metal, and Building Maintenance in the State of New Jersey of the USA. Allow the filter to completely dry before returning it to the device. One of these wires will be coming from the thermostat and the other will go to the outside unit. Use tab to navigate through the menu items. When changing the AC or furnace filter, the arrow should face the furnace and point away from the return duct. Website operating problems contact Webmaster. Bundle Packs are a great way to save and get faster shipping! New XV80 Trane furnace makes noise when blower runs at low speed. 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. 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. Remember that CFM stands for Cubic Feet Per Minute. I am just clueless, could it be the thermostat (really old) or something that is going to cost a billion dollars to fix? Employment/Education Highlights I.e., maybe more heat is now escaping through the exhaust. I simply am unable to put my hands on the schematic. On this board, pins 3, 4, and 5 on the SW1/1 through SW1/8 dip switch block have to do with air flow. Usually there will be three speeds ranging from 40 to 100% of airflow. 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. I guess you are talking about a 3 speed direct drive motor with 1/2 shaft. A dirty air filter can cause your HVAC system to go into overdrive and result in costly energy bills. The house has a 3 ton trane xl20i and an xv80 (4 ton max). Black: High; Yellow: Medium-high ; Blue or brown: Medium-low; Red: Low; 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. During "Fan On", the fan runs at 50% of whatever the maximum speed of the fan is. 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. BarnArtist, locate the wiring schematic on your furnace. I'm in the process of re-wiring my blower to run on high with the furnace. With heating oil at $4.50/gal I can assure you without measuring anything that running my blower on low is NOT more efficient from a $$ perspective. So How Do We Adjust Fan Speed? Your AC or furnace is designed for a specific type of filter. Are there downsides to this. By clicking '. Another key difference is that the circulate . You will need to find the main cover panel on your fan. There is a modification that will allow the VS fan to run on high speed at all times while in the AC mode and with the fan "ON" mode. Typical setups include these wire colors with associated blower speeds. Turn off the emergency HVAC shutoff switch Remove top and bottom cover panels on the air handler / furnace unit (fig.5.1). I think the best bet would be to actually test it for a few months and see. Heat exchange takes time. Only 3 of the 5 colored wires may be used at a time. At night with an even lower set point I switch the fan speed to automatic. *Based on third party testing of particle removal efficiency down to 0.3 microns (2005). I understand the reason for slowing the air to remove humidity. This lower blower speed enhances The boiler is feeding a DHW sidearm and furnace plenum HX. It would have no affect on the Heat settings. -The "AUX Heat" makes sure that there is enough airflow when elect strip heat is called. He is also an HVACR Contracting Business owner of 16 years and holds an NJ HVACR Master License. In the example above, an ECM 2.3 16 pin variable speed motor is connected to an air handler control board. -The "AC/HP CFM Adjust" is the airflow volume to be set for system, efficiency, comfort. The same is true when changing the air duct filter. Asking for help, clarification, or responding to other answers. When he's not enjoying family time with his wife and three boys, he loves tinkering with projects and geeking out on electronics. Heres What It Means, Why You Should Monitor the Humidity Levels In Your Home. For business related inquires email us at. DoItYourself.com, founded in 1995, is the leading independent I have a Carrier furnace/heat pump with an expensive control thermostat that talks directly to the heat pump. . If you really wanted to be scientific, you could perform an experiment and post the results here. rev2023.3.3.43278. 4TEE3C10A1 That is excessivly loud. Change the speed. Move the high-speed wire to low. Mine. Sign up for our email newsletter to learn helpful HVAC tips and tricks before your purchase your 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. Privacy Policy. - The "Continuous Fan" refers to when the G terminal is powered for the fan only to run. Should I upgrade to a pcm br compatible thermostat? Thoroughly rinse the filter. Most furnaces have a relay switch on the door cover. bean. 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 system might not work properly. I found one glued to the back of my furnace door, one in the manual, and maybe one on-line too. 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. Your OP was a noise complaint. What sort of strategies would a medieval military use against a fantasy giant? Oil Furnaces may have a temp rise of 50-60F. All rights reserved. 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. Divide the rated Btu input by 10,000. If the Delta T continues to rise, this is due to low indoor 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. 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. I got the sv96 100k btu 2stage furnace with variable fan and the xl18 4ton ac unit. It wasn't the noise that was bothering me, it was the desert-like sensation of swirling dry air. 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. In humid climates, 350 CFM per ton can be selected in order to remove more moisture from the air. Measured the temperature of the air before the coil and after the coil and used DeltaT (change in temperature) to determine the blower setting. ECM Multi-Speed Blower Motor (Broad Ocean Type), For an ECM blower motor with wires exiting the module (shown above), the speed is changed at the control board by moving the colored wire terminals. Helm is an accomplished DIY craftsman. Why is my furnace blower running at low speed? I miscalculated. in this thread in this sub-forum in the entire site. Here's the sequence: Furnace gets call for heat. The arrow should face the direction the air is flowing. When the system calls for heat and the inducer fan begins to run, check each pressure switch terminal. 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). However, I like the continually run the fan to even out air temperature in the house. A slim, removable cover will reveal the filter location. There is no humidistat. Thanks for contributing an answer to Home Improvement Stack Exchange! The blower energy draw at a lower speed will be offset by the loss in fan wheel inertia. 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. The variable speed furnace delivers the proper amount of airflow based on the heating and cooling needs of your home. (FYI Filter was clean and furnace was recently serviced all prior to my initial investigation of the short cycling). You can change the settings for cfm fan speed, but you have to do it manually at the board. Air filters are typically found behind the return vent door, often located in the ceiling or wall in the central portion of your home. Why is there a voltage on my HDMI and coaxial cables? Choose the Trane owner guide thats specific to your unit for detailed instructions on locating and changing yourairfilter. The problem is, the furnace control module doesn't use a separate speed when the unit is running in continuous FAN mode. video below! I want to increase volume flow if possible. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. They do this by coupling a sophisticated, programmable thermostat to a variable-speed motor. Changing your HVAC and furnace air filter is a vital part of home maintenance. Most of these are on the bottom left of the control board. The manometer tells you the CFM number. The heat exchanger warms up the incoming air and a blower or air handler sends the warm air throughout the home. suggestions. In Dungeon World, is the Bard's Arcane Art subject to the same failure outcomes as other spells? That will give you the most reliable results for your particular system. 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. Yes, there is a way to bring up the speed on the air handler.. 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. (Although it wouldn't hurt to record those too.) Cockroaches and waterbugs coming in through the vents was my big clue there. Remove the motor and mounting bracket. The installation instructions for this furnace are needed in order to be able to know how to set these dip switches. 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). To learn more, see our tips on writing great answers. These connected to (park) terminals, which are not used and simply hold those two additional wire speeds. homininet 8 mo. 1995-2023 MH Sub I, LLC dba Internet Brands. 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. A 90 percent-plus furnace needs 150 cfm per 10,000 Btu of input. Press Apply to save and exit. You will also see the red E icon under Emergency . 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. with a wiring harness for the fan. The arrow should point toward the unit. Note also that there is always just "one blower" but that blower may or may not be variable speed, etc. 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. It had been set on the higher speed, but that was too harsh, so I lowered it to the slower speed. Example: Rated Btu Input = 60,000 / 10,000 = 6 x 150 = 900 cfm of required furnace airflow. Thanks for the reply. thanks in advance. A second filter location for most HVAC systems and furnaces is the air handler portion of the system. Switched it to heat (in which case the furnace board is in control of the fan, not the stat) - got fire, no fan. Learn more about Stack Overflow the company, and our products. PSC - The Permanent Split Capacitor Motor is still the most commonly used. (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.) If the control board is at fault, replace it. Bus Driver/Substitute Teacher 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). The best answers are voted up and rise to the top, Not the answer you're looking for? 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. Remove both of these wires and wire nut them together. Then, carefully switch it to the setting of your choice and push it back into the control board. It helps to have over 50 years of farming and ranching experience. 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. How to Lower the Ouptut of Oversized Furnace. 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. STEP-BY-STEP REPLACEMENT GUIDE Turn off air conditioning / heat from the thermostat. My gas furnace has two options for the blower speed: MED, and MED-HI. DoItYourself.com, founded in 1995, is the leading independent home improvement and repair website. Before you begin this process it is a good idea to make sure that no power is going to the fan. This will allow you to access the control board. Select Climate from the blue menu on the left side of the page. He farmed commercial garden produce for several years. To switch the jumper, you will need to hold onto it gently as you pull it out of its current setting. Trane XR80 Troubleshooting After examining the flashing system you should check the green light speed. It only takes a minute to sign up. @Dave: Those were my thoughts as well. Remove the air handler. Additionally, they can be identified by the presence of a removable module/bell on the end of the motor. If the furnace manufacturer supplies different burners for that unit you may be risking premature failure. The factory may only set two or three of these colors as actual speeds. The following list refers to each adjustment starting from the bottom and moving upward. Has anyone done this and can anyone give me a reason why I shouldn't do this? If the blower motor is burned out, replace it. Certified Welder The gas kicks on and is lit by the ignitor. I just moved into a house with a Trane XR80 furnace (several years old). Why do many companies reject expired SSL certificates as bugs in bug bounties? These blower motor versions can be found in furnaces, air handlers, and packaged units. Once you cut the power, you can remove the cover of your furnace to get access to the control board. 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. Is it Covered Under Homeowners Insurance or a Home Warranty? 3 of the wires will likely terminate with just a twist on cap. The ohm meter should read very close to zero. ASE Certified Master Auto Technician Yes: you will save electricity costs by running your blower on low. Slowing the blower speed reduced the noise but I take it you would still like it to be more silent. (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. Its not advisable to slow your furnace blower speed. For 240v units, both the L and N are hots. 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. 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. This is done so that the maximum amount of heat is gained in the building from the refrigerant. Typical setups include these wire colors with associated blower speeds. I have a Trane XV90 propane furnace with a variable speed blower. The constant air turn over at a lower set point keeps the house comfortable. Make sure power is off when doing any adjustment. It was working a week ago but just recently when it runs it blows out cold air. How does a furnace work? If your home has multiple HVAC systems, there will likely be at least one air filter for each unit. I'm also going to go through and make sure there are no visible leaks or damage to them. On this control board, there are multiple adjustments for the airflow speeds. American Standard air handler troubleshooting The most important factor is temperature differential - the difference between the inside temperature and outside temperature. He built every permanent building on his current homestead and did all the plumbing and electrical work.

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how to change fan speed on a trane furnace

how to change fan speed on a trane furnace