By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Air filters are measured by Minimum Efficiency Reporting Values (MERV). Most of these are on the bottom left of the control board. The problem is, the furnace control module doesn't use a separate speed when the unit is running in continuous FAN mode. You need to follow the wiring diagram inside the HVAC unit. I have a Trane XV90 propane furnace with a variable speed blower. Adjust the fan speed, and if you're still experiencing problems, contact your local American Standard Customer Care dealer. Thoroughly rinse the filter. When one of the taps is powered with 24v, the motor will turn on and run at the selected speed. My first thought was that the unit was oversized, but I figured out how to check the DIP switch settings. (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.) Here are common Trane AC repairs not listed in the guide and their repair cost for parts and labor: Leaking coil and refrigerant: $1,150-$1,750 Thermostatic expansion valve (TXV): $275-$450 Compressor and refrigerant (after ten years, typically): $1,150-$1,600 Failed solder connection on refrigerant lines and refrigerant: $875-$1,220 There is another way to wire this, but I can not find it back.. Copyright 1995-document.write(new Date().getFullYear()) MH Sub I, LLC dba Internet Brands. The fan speed is very low when not heating/cooling. 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. 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. View our Privacy Policy here. Many gas-fired, high-efficiency furnaces also save on the electricity required to power the blower motor, though this savings is not factored into the AFUE rating. Identify the blower fan and the speed wires. The MERV rating is typically printed on the filter packaging, but not necessarily on the filter itself. #3. Step 3: Find the furnace draft inducer. (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. You should now see a red E icon in the System Mode screen next to Auto and Heating modes. 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 this case, to adjust the blower speeds, move the dip switches (in the red section of the control board) to the positions shown in the manufacturer's installation instructions. 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. - The "Continuous Fan" refers to when the G terminal is powered for the fan only to run. Yes, there is a way to bring up the speed on the air handler.. I'm also going to go through and make sure there are no visible leaks or damage to them. Then switch the jumper to your desired speed. These blower motor speeds are programmed at the manufacturer's factory for the specific equipment model number unit it is installed in. On the furnace / air handler board you should have two wires on the "Y2" connection, assuming a two-stage cooling system. 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. Since I first posted this thread, my installer called Trane to get an answer to my original question. Tied from R to BK in air handler. These two losses comprise the magnitude of heat losses. This will increase the number. Soak the filter in warm water in a bathtub or sink. Home Improvement Stack Exchange is a question and answer site for contractors and serious DIYers. Typically the colors are: White = neutral speed Red = low speed Yellow = medium speed Black = high speed For business related inquires email us at info@acservicetech.com. 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. 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. Connect the common wire to the neutral terminal of the furnace's control board. thanks in advance. I was reading the Trane XL824 thermostat installation and setup manual. This is done so that the maximum amount of heat is gained in the building from the refrigerant. Remove two screws from each bracket leg holding the motor. When the R-G circuit is made, the blower motor operates on heating speed. It provides quieter and more even and comfortable heat than a conventional furnace and doesnt consume electricity unnecessarily. Measured the temperature of the air before the coil and after the coil and used DeltaT (change in temperature) to determine the blower setting. By pressing "submit", I understand that I am providing express consent for Trane Residential to contact me about this request or similar topics. 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). Bus Driver/Substitute Teacher He owned and operated a manufacturing business building Compact Utility Vehicles for homeowner use. Batch split images vertically in half, sequentially numbering the output files, Using indicator constraint with two variables. Proper duct sizing can resolve the issue you are having. He farmed commercial garden produce for several years. On my furnace the schematic showed there were three speed settings. If the pressure switch is functioning properly . Choose the Trane owner guide thats specific to your unit for detailed instructions on locating and changing yourairfilter. Change the speed. ASE Certified Master Auto Technician 1995-2023 MH Sub I, LLC dba Internet Brands. (FYI Filter was clean and furnace was recently serviced all prior to my initial investigation of the short cycling). I am just clueless, could it be the thermostat (really old) or something that is going to cost a billion dollars to fix? 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. Trane. Recently I did a blower speed adjustment on the 2nd floor air. If the instructions are not with the furnace, you can look up the model number of the unit and search for the installation manual via a google search. For 240v units, both the L and N are hots. But the 'real' one will be the one connected with a twist on cap to the fan motor. 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 module must be a trane furnace model specific programmed and is available separate from the motor. Step 2: Remove the panel cover of the furnace. You need to find the wires that determine blower speed inside your furnace. 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. HVAC system for small church has twin Trane XR90 units installed in 2009 to replace a unit with a much larger single blower. 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. 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. 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. 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). 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. BarnArtist, locate the wiring schematic on your furnace. Compatible with Trane systems or any standard HVAC system. 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. The system might not work properly. If the Delta T continues to rise, this is due to low indoor airflow. 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. There is no humidistat. This will show what speed each numbered tap is programmed as. A continuous green light means the IFC circuit board needs replacing. 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. Sometimes you have to add more ducts to achieve the proper pressure and velocity. The ignitor glows. There are also red and brown furnace speed wires. No problem with the boiler. Why are Suriname, Belize, and Guinea-Bissau classified as "Small Island Developing States"? It is important to know that you cant go by a normal color code to determine the speeds. Remember that CFM stands for Cubic Feet Per Minute. When the system calls for heat and the inducer fan begins to run, check each pressure switch terminal. 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. It is about 1300-1400 sq feet, but then the basement was finished at some point, more or less doubling the square footage. Dave. 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! We welcome your comments and suggestions. 80% would be great for me. The only alternative is to raise the discharge temperature. This trick only works on gas furnace systems with a multi-speed blower. Available from Trane Dealers in select locations. Most homes have a standard split-system air conditioning unit with two main fans. Remove the air handler. 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. 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. New XV80 Trane furnace makes noise when blower runs at low speed. Trane is a top rated US company of HVAC systems that offer quality and reliability. Press Apply to save and exit. The boiler is feeding a DHW sidearm and furnace plenum HX. If power is getting to the blower motor, but the motor does not run, the motor may be burned out. charts are usually found on the air handler inside door to controls. Most of these are on the bottom left of the control board. Identify those arcade games from a 1983 Brazilian music video. It would have no affect on the Heat settings. How does a furnace work? When he's not enjoying family time with his wife and three boys, he loves tinkering with projects and geeking out on electronics. Connect and share knowledge within a single location that is structured and easy to search. and our 3 of the wires will likely terminate with just a twist on cap. Why do many companies reject expired SSL certificates as bugs in bug bounties? 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. When changing the AC or furnace filter, the arrow should face the furnace and point away from the return duct. I hope this helps you understand how to adjust the airflow speed on ECM Blower Motors! Each is associated with a different blower speed. The noise of forced air is annoying. 4TEE3C10A1 That is excessivly loud. I found one glued to the back of my furnace door, one in the manual, and maybe one on-line too. I know I need to replace a dying blower motor in a 1992 Trane . That said the contractor has no real incentive to get it right. suggestions. Proper returns are rarely a thought. Top 10 Spots! Most require that you open a box (2 screws?) Your OP was a noise complaint. 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. Make sure power is off when doing any adjustment. 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. How to use Slater Type Orbitals as a basis functions in matrix method correctly? In the example above, an ECM 2.3 16 pin variable speed motor is connected to an air handler control board. Remove battery from the thermostat (or disconnect thermostat altogether). To understand how this works, lets look at the wiring on your furnaces blower. you will get the better dehumidification with the lower setting. I want to do what is best. In the manual, it lists some settings, e.g. In Dungeon World, is the Bard's Arcane Art subject to the same failure outcomes as other spells? *Based on third party testing of particle removal efficiency down to 0.3 microns (2005). American Standard air handler troubleshooting Id check that out first. It offers three settings: 525 RPM for saving energy, 900 RPM for heating, or 1100 RPM for air conditioning. 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. Is it Covered Under Homeowners Insurance or a Home Warranty? The blower is set for 400 cfm for a 4 ton outdoor unit, and comfort-R is not enabled (all factory). 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. I have posted an inquiry under the Air Conditioning forum. Why is my furnace blower running at low speed? I just had a Trane system installed last week and I've been very happy with it! Copyright Our Privacy Policy governs the use of your information. The system also accounts for blocked vents and dirty furnace filters, and adjusts fan speed as needed to compensate. If you are a homeowner looking to repair your own appliance, understand that the voltages can be lethal, the fuels are highly flammable and high pressures are used. I understand the reason for slowing the air to remove humidity. 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. 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. Heating, Cooling, Air Conditioning, Ventilation and T-Stat Controls, 3-Speed, 4-Wire Ceiling Fan Switch Wiring. 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. with a wiring harness for the fan. You will also see the red E icon under Emergency . Switched it to heat (in which case the furnace board is in control of the fan, not the stat) - got fire, no fan. 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. He built every permanent building on his current homestead and did all the plumbing and electrical work. Continue reading to learn how to lower the fan speed. But I guess my question is, can the air flow problem really be a simple as upping the blower speed? If you need assistance determining the best filter for your unit, a Trane employee would be happy to assist you. 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. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. (Without enclosing my house in a climate-controlled bubble). Switch the Jumper On most control boards there will be a jumper that is marked to show that it controls the speed. 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. 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. Your AC or furnace is designed for a specific type of filter. My question was whether the efficiency of heat transfer thru the exchanger would be somewhat compromised due to the reduced airflow. This covers speed adjustment on a PSC motor. Know your limits. Mutually exclusive execution using std::atomic? @Dave: Those were my thoughts as well. bean. When you open the panel, it kills the power to the furnace. Switch the power back on and test it. Can this be adjusted See our Privacy Policy for more information. Example: Rated Btu Input = 60,000 / 10,000 = 6 x 150 = 900 cfm of required furnace airflow. . Craig creates educational HVACR articles and videos which are posted at https://www.acservicetech.com & https://www.youtube.com/acservicetechchannel & https://www.facebook.com/acservicetech/. The same is true when changing the air duct filter. 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. Variable speed furnaces only operate at . Comfort R should be off if you are using . The A/C will run according to the thermostat settings. In other units, it may be 2, 3, and 4 that are programmed. I'll edit my answer and include the exact parameters I'd record every day for a thorough study. Match the positions to the desired pictures within the manufacturer's installation literature. This will help prevent injury and. Allow the filter to completely dry before returning it to the device. Recently I did a blower speed adjustment on the 2nd floor air handler and thought to show how it can be done. The variable speed furnace delivers the proper amount of airflow based on the heating and cooling needs of your home. home improvement and repair website. A MERV rating speaks to the filters ability to capture large particles. Locate the speed wires. I have a Trane Variable Speed Air Handler (TWE049E13FB2). Turn off the power source that is connected to the furnace blower. 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. A 1.5 ton AC unit may not be large enough to cool the . 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. The gas is shut off and the induction motor stops running while the blower . I think I had it on my hard drive, and the hard drive crashed on us last winter. However, a higher MERV rating may not be best for your system. If you have not read that yet, I would encourage you to do so! Use tab to navigate through the menu items. Usually, gas furnaces have a temp rise of 50F. 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. The constant air turn over at a lower set point keeps the house comfortable. The installation guide clearly describes how to set airflow for heating mode and cooling mode. 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. Does Nest utilize all the benefits of a communicating furnace, Low speed furnace fan blower motor will not shut off, How to calculate efficiency of old Westinghouse furnace VS new variable speed Furnace. Running your furnace fan all the time isn't exactly a bad thing. No: you will not save on gas/oil costs by running your blower on low. . A 90 percent-plus furnace needs 150 cfm per 10,000 Btu of input. These adjustments can be made by pulling the single wire connector and moving it to another single tab positioned horizontally in each row. Select Climate from the blue menu on the left side of the page. On this motor module, the speed wires are red, orange, blue, yellow, and black. Test the new speed. Its not advisable to slow your furnace blower speed. This will allow you to access the control board. Privacy Policy. But you will have a tough time measuring either on your basement Trane. (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! 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. If you know what you are doing, it is very simple to adjust the speed of your furnace fan. -The "AUX Heat" makes sure that there is enough airflow when elect strip heat is called. Options are, for example, 4 minutes at 80%, or 30 seconds at 50%. 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. On most control boards there will be a jumper that is marked to show that it controls the speed. 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. 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. The fan speed is controlled on the control board for the furnace. Yes--the efficiency of the heat exchanger will decrease. He also builds custom tools for metal working. 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. 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. Questions of a Do It Yourself nature should be submitted to our "DoItYourself.com Community Forums". 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). 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. Check out our free Quizzes to test your knowledge here! Warmup.com mentions that it was the original design of radiant floor heat systems by the Romans. It is a Trane S8X1 single stage furnace and air handler, paired with an XR16 3 ton AC unit. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. Trane XR80 Troubleshooting After examining the flashing system you should check the green light speed. That is incorrect. He is experienced in wood and metal construction, having designed and built several houses and metal buildings. These connected to (park) terminals, which are not used and simply hold those two additional wire speeds. Reddit and its partners use cookies and similar technologies to provide you with a better experience. Once you cut the power, you can remove the cover of your furnace to get access to the control board. You may freely link CFM stands for "cubic feet per minute." A slim, removable cover will reveal the filter location. You can verify the actual CFM by measuring the TESP of the system and comparing it to the manufacturer's airflow data sheet. Unlike a conventional systemwhere the furnace goes on, blows hot air into the house at full force for a few minutes, and then shuts offa variable-speed or variable-capacity system runs the blower for longer periods at lower speeds. It allows three constant fan speeds as well as an automatic fan speed and a variable burn rate and compressor and fan speed. Access the control board. The continuous fan is marked SW3. My gas furnace has two options for the blower speed: MED, and MED-HI. -The BTU/HR size is selectable between 48,000 42,000 36,000 or 30,000 BTU/HR. 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. This furnace features the common White-Rodgers Intell-Ignition circuit board. 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. The hot air will rise and heat the floor from beneath, a DIY form of radiant floor heating. Various advertisements for variable speed high efficiency furnaces call them "more energy efficiency" (note also the difference between a variable speed blower and a high efficiency furnace, they're separate, for instance you can have a variable speed blower on a low efficiency furnace). Luci is a contributing writer for DoItYourself.com. I just moved into a house with a Trane XR80 furnace (several years old). 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. The control board is communicating with the blower module in order to determine the airflow volume needed.
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