Thus, my blower can't be using that much electricity on high. I recently had have a trane xl 90 want to adjust speed of blower fan blower motor has 4 wires white going to neutral black unhooked blue to high speed yellow to I have a Trane Indoor Air Handler Model No. Should I upgrade to a pcm br compatible thermostat? Why do many companies reject expired SSL certificates as bugs in bug bounties? Fortunately, theres a simple fix if you look at your furnaces Integrated Furnace Control (IFC) board. Possibly you could do the same here (turn down blower and gas). The arrow should point toward the unit. You will also see the red E icon under Emergency . If you have not read that yet, I would encourage you to do so! The only alternative is to raise the discharge temperature. The house cools off quick - too quick - and feels humid (not sure of the rh%). We are no longer supporting IE (Internet Explorer). When you open the panel, it kills the power to the furnace. 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. That is incorrect. -The BTU/HR size is selectable between 48,000 42,000 36,000 or 30,000 BTU/HR. 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 the control board is at fault, replace it. For business related inquires email us at info@acservicetech.com. Heres What It Means, Why You Should Monitor the Humidity Levels In Your Home. 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. Connect the common wire to the neutral terminal of the furnace's control board. The ohm meter should read very close to zero. This will increase the number. Then, carefully switch it to the setting of your choice and push it back into the control board. This is a follow-up to our other article on "Adjusting the Furnace/AC Airflow Speed on a 120v PSC Blower Motor". A properly fitted filter can also trap unwanted, and oftentimes unseen, pollutants from the air in your home, including: Start with the return vent. I've already had a few HVAC vendors give me some specious arguments about moisture buildup, another even told me he'd "lose his license" if he touched the job. The same is true when changing the air duct filter. Changing your HVAC and furnace air filter is a vital part of home maintenance. Blower on delay settings, which evidently have an impact on the duration and speed of the blower fan. H.R. He also builds custom tools for metal working. If you do, you may not have enough air flow over the heat exchanger, resulting in overheating and eventually a shorter exchanger life span. in this thread in this sub-forum in the entire site. I've gone through the process of adjusting the manual zone louvres on the main ducts (and on registers) and checked them with my camera for blockages. Only 3 of the 5 colored wires may be used at a time. Reddit and its partners use cookies and similar technologies to provide you with a better experience. 01 - Trane Furnace Control Board. If you really wanted to be scientific, you could perform an experiment and post the results here. These blower motor versions can be found in furnaces, air handlers, and packaged units. If the furnace manufacturer supplies different burners for that unit you may be risking premature failure. problems contact webmaster@doityourself.com. 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. rev2023.3.3.43278. I was reading the Trane XL824 thermostat installation and setup manual. I can unsubscribe and opt-out from future communications at any time. The noise of forced air is annoying. 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. By clicking '. Tied from R to BK in air handler. The wires that are used will determine the speed settings that the motor will run at. These two losses comprise the magnitude of heat losses. ago. 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. 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. Anyone? The problem is, the furnace control module doesn't use a separate speed when the unit is running in continuous FAN mode. 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. To learn more, see our tips on writing great answers. He farmed commercial garden produce for several years. See our Privacy Policy for more information. 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. No problem with the boiler. We have been heating the crawl space in our house for several winters because the ductwork was all torn up from rats. This BTU/HR capacity should be used to set the CFM for the indoor blower motor. ECM Multi-Speed Blower Motor (Genteq X-13). Asking for help, clarification, or responding to other answers. DoItYourself.com, founded in 1995, is the leading independent home improvement and repair website. The blower/fan seems to be running way to fast. It accounts for the amount of air in circulation for precision airflow. All information is provided "AS IS." I understand that the higher speed is probably for cooling (for which we have a separate duct system and handler), but is it the case that the speed can be switched to a higher fan speed? 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. This covers speed adjustment on a PSC motor. I understand the reason for slowing the air to remove humidity. 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. You will need to find the main cover panel on your fan. To understand how this works, lets look at the wiring on your furnaces blower. A 1.5 ton AC unit may not be large enough to cool the . 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 a Carrier furnace/heat pump with an expensive control thermostat that talks directly to the heat pump. We welcome your comments and 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. Second-stage auxiliary heating for heat pumps and multi-stage furnaces. homininet 8 mo. Locate the speed wires. I'm not in enhanced mode. to this site, and use it for non-commercial use subject to our terms of use. 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. Change the speed. BS in Industrial Technology, If you know what you are doing, it is very simple to adjust the speed of, Before you begin this process it is a good idea to make sure that no power is going to the fan. 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 the manual, it lists some settings, e.g. 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 the furnace / air handler board you should have two wires on the "Y2" connection, assuming a two-stage cooling system. Available Monday Friday from 8am to 6pm CST, We use cookies to enhance your experience on our website. 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. the module must be a trane furnace model specific programmed and is available separate from the motor. 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. 1995-2023 MH Sub I, LLC dba Internet Brands. The blower fan on this blower has four speeds. Another common place with a schematic is on the back of the blower fan door. thanks in advance. 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 Trane XR80 Troubleshooting After examining the flashing system you should check the green light speed. 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. Connect the black wire to the manometer. There are often five wire colors coming from your blower to your IFC. 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. I want to increase volume flow if possible. Its time to clear the air. Most furnaces have a relay switch on the door cover. It provides quieter and more even and comfortable heat than a conventional furnace and doesnt consume electricity unnecessarily. air flow is inadequate to match demand and duct size. Are there downsides to this. 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. low would be 350 CFMs/ton, medium 400 CFMs/ton, high 450 CFMs/ton. Trane is a top rated US company of HVAC systems that offer quality and reliability. Sometimes you have to add more ducts to achieve the proper pressure and velocity. 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. 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. Sometimes less cmf will give the air more time in the heat exchanger thus letting it get hotter. This trick only works on gas furnace systems with a multi-speed blower. Craig is a licensed Teacher of HVACR, Sheet Metal, and Building Maintenance in the State of New Jersey of the USA. Move the high-speed wire to low. Now, I haven't done the measurement to learn how much electricity my blower uses on low vs high. Based on some randomly googled comments here: http://www.inspectorsjournal.com/Forum/topic.asp?TOPIC_ID=8998& seems to agree it decreases efficiency but may increase comfort [ex: cold spots or noise level] :). We also have quick reference cards for use out in the field! Additionally, they can be identified by the presence of a removable module/bell on the end of the motor. To clean a reusable filter, remove the filter from the air cleaning device. -The "AUX Heat" makes sure that there is enough airflow when elect strip heat is called. If your home has multiple HVAC systems, there will likely be at least one air filter for each unit. Typical setups include these wire colors with associated blower speeds. When it is flashing fast there is heat throughout your home. Cross country truck driver -- over dimensional freight All rights reserved. I connected a second thermostat to the circuit board to run the blower (R to G). The airflow adjustments on this board are pictured below. Variable Speed Blower Motor ( Genteq 2.3, 16 pin connector). 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. If you have suggestions or comments they are welcome. 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. Most of these are on the bottom left of the control board. I guess you are talking about a 3 speed direct drive motor with 1/2 shaft. Only swap these two wires. Comfort R should be off if you are using . Check out www.acservicetech.com/store. There are often five wire colors coming from your blower to your IFC. Has anyone done this and can anyone give me a reason why I shouldn't do this? Certified Welder Mutually exclusive execution using std::atomic? By regularly changing your filter, you can improve your indoor air quality and extend the life of your heating and cooling system. Carefully disconnect the wires from the coolant terminal, which is located on the back of the unit. Another key difference is that the circulate . home improvement and repair website. 3.5 x 400 = 1400 CFM. Trane s9v2 should thermostat control blower speed? The control board has relays that regulate the voltage to each component in the furnace. Mine. 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). Heat exchange takes time. -The "Blower-on and Blower-off delay" time period can be selected. This will allow you to access the control board. Cockroaches and waterbugs coming in through the vents was my big clue there. Put the air handler back. It had been set on the higher speed, but that was too harsh, so I lowered it to the slower speed. 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. There are also red and brown furnace speed wires. I have posted an inquiry under the Air Conditioning forum. Radiant floor heat web sites are mysteriously silent on this simple and cheap modification of pre-exisiting systems to accomplish the same goal. Disconnect between goals and daily tasksIs it me, or the industry? You can verify the actual CFM by measuring the TESP of the system and comparing it to the manufacturer's airflow data sheet. My gas furnace has two options for the blower speed: MED, and MED-HI. One fan is inside the house, and one is outside the home. *NOTE* If you attempt this, be absolutely sure that you have no power going to your system, especially before changing wires. Questions of a Do It Yourself nature should be Air filters are measured by Minimum Efficiency Reporting Values (MERV). The fan speed is very low when not heating/cooling. I think I had it on my hard drive, and the hard drive crashed on us last winter. A 90 percent-plus furnace needs 150 cfm per 10,000 Btu of input. ASE Certified Master Auto Technician The system also accounts for blocked vents and dirty furnace filters, and adjusts fan speed as needed to compensate. Before you begin this process it is a good idea to make sure that no power is going to the fan. 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. There is another way to wire this, but I can not find it back.. Top Ten Interview Tips to Land that HVAC/R Job! Connect Y2 on thermostat to BK on furnace, and Y2 on the Condensing unit Cut R-BK jumper at Furnace Install R - O jumper at Furnace Connect W2 on thermostat to W2 on furnace (or alternatively, jumper W1 to W2 at furnace and confirm that dip switches are set correctly for Stage Delay if furnace is desired to automatically control heating stages) (FYI Filter was clean and furnace was recently serviced all prior to my initial investigation of the short cycling). This will help prevent injury and damage to the furnace fan. Can you increase the speed of an ECM AC blower? 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. Remove the motor and mounting bracket. She has experience researching and creating a wide range of home improvement and garden projects, and especially enjoys learning about fireplaces and exterior design. It would have no affect on the Heat settings. Thanks for the reply. Our Privacy Policy governs the use of your information. Is it Covered Under Homeowners Insurance or a Home Warranty? Available from Trane Dealers in select locations. So the blower motor is dead. Being an bms/controls guy I rarely have enough cfm in large buildings. (Although it wouldn't hurt to record those too.) A dirty air filter can cause your HVAC system to go into overdrive and result in costly energy bills. It shouldn't take more than a few minutes a day to record the data anyway. The arrow should face the direction the air is flowing. My first thought was that the unit was oversized, but I figured out how to check the DIP switch settings. 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. 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. We have a Trane XL80 furnace manual in pdf version that you can download for free. 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. Wires from the 16 pin plug are connected to this board. I installed a Thermo Control 2000 boiler and first fired it up this Friday. Can this be adjusted At night with an even lower set point I switch the fan speed to automatic. The variable speed furnace delivers the proper amount of airflow based on the heating and cooling needs of your home. submitted to our "DoItYourself.com Community Forums". with a wiring harness for the fan. The BTU/HR capacity or tonnage of the air conditioning system should be included within the model number of the outdoor unit. 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. These adjustments can be made by pulling the single wire connector and moving it to another single tab positioned horizontally in each row. This will show what speed each numbered tap is programmed as. During "Fan On", the fan runs at 50% of whatever the maximum speed of the fan is. New XV80 Trane furnace makes noise when blower runs at low speed. The A/C will run according to the thermostat settings. There are several tutorials on Youtube about how to do this step for specific inducer motor brands. When the summer air conditioning season transitions to the fall heating season, increase the blower speed by switching the wires on the cool and heat terminals. These three are connected to the "Cool", "Heat", and "Fan" terminals on the control board. The fan speed is controlled on the control board for the furnace. Variable speed furnaces only operate at . He is also an HVACR Contracting Business owner of 16 years and holds an NJ HVACR Master License. Ilook forward to responding to many more! and our The ignitor glows. When one of the taps is powered with 24v, the motor will turn on and run at the selected speed. one room doesnt get as warm or as cool as the others. No need for direct trane replacment motor. I know that it has been done. Running your furnace fan all the time isn't exactly a bad thing. It only takes a minute to sign up. Soak the filter in warm water in a bathtub or sink. The MERV rating is typically printed on the filter packaging, but not necessarily on the filter itself. It is important to know that you cant go by a normal color code to determine the speeds. lower efficiency furnace) it is drafting exhaust up the flue which can't be good. How to tell which packages are held back due to phased updates, Linear Algebra - Linear transformation question. Is it suspicious or odd to stand by the gate of a GA airport watching the planes? 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. Making statements based on opinion; back them up with references or personal experience. 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. If the Delta T continues to rise, this is due to low indoor airflow. You need to find the wires that determine blower speed inside your furnace. Adjusting the Airflow Speed on ECM Blower Fan Motors! bean. 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. Cut the wire's terminal connector off with wire cutters. The air handler houses the fan and fan motor and is usually located in the basement or attic. I'm also going to go through and make sure there are no visible leaks or damage to them. Step 3. 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. Trane. Top 10 Spots! -The "System Type" is the CFM per ton to be adjusted between low, normal and high. I suppose I probably won't do so it, but out of curiosity what kind of downside might one run into? Select Climate from the blue menu on the left side of the page. Invention prototypes are another of his many accomplishments. The blower motor also begins running, but at low rpm. This is NOT a user servicable item. @Dave: Those were my thoughts as well. 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. How does a furnace work? During the awake hours I Hold the fan speed at either low or medium. Step 3: Adjust the Pulley on the Blower Drive Motor ECM blower motors do not require an external capacitor to operate. This control board is out of a variable speed furnace with a modulating gas valve that has a variable speed inducer motor. This is done so that the maximum amount of heat is gained in the building from the refrigerant. 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. 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!" 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. Press Apply to save and exit. Usually, gas furnaces have a temp rise of 50F. You should now see a red E icon in the System Mode screen next to Auto and Heating modes. These blower motor speeds are programmed at the manufacturer's factory for the specific equipment model number unit it is installed in. Can a furnace with a variable speed blower be used in a multistory house? Run a jumper from "R" to "Y2" and the blower will run continuously at the second-stage cooling speed. Usually there will be three "speeds" ranging from 40 to 100% of airflow. Of course all that heat was lost because of the ridiculous number of vents in our foundation. I have a Trane XV90 propane furnace with a variable speed blower. A MERV 16 filters particles at a level near that or a HEPA. 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. Since I first posted this thread, my installer called Trane to get an answer to my original question. Does that have any impact on the efficiency of the unit? I think the best bet would be to actually test it for a few months and see. Learn more about Stack Overflow the company, and our products. 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. 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. Locate your thermostat on the page and click System Mode. Divide the rated Btu input by 10,000. 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. Test the new speed. Then switch the jumper to your desired speed. Why is there a voltage on my HDMI and coaxial cables? 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. Cookie Notice I'll just run the heat pump through the leaky ductwork and heat the crawl space. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Variable Speed Blower Motor (Genteq ECM 3.0, 4 pin connector). Home House & Components Systems Heating & Cooling System Air Conditioners.