ECM blower motors do not require an external capacitor to operate. 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!" 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). (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! 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. 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. 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. Since I first posted this thread, my installer called Trane to get an answer to my original question. Remove both of these wires and wire nut them together. New XV80 Trane furnace makes noise when blower runs at low speed. 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. This can be done through an independent dehumidistat or through a thermostat's DEHUM terminal (if available). Employment/Education Highlights H.R. The MERV scale rates filters from 1 to 16. All information is provided "AS IS." It can happen for lots of reasons, from improper furnace sizing and dirty filters to air duct insulation failures to the room being farthest from the furnace. Once you cut the power, you can remove the cover of your furnace to get access to the control board. I understand the reason for slowing the air to remove humidity. The factory may only set two or three of these colors as actual speeds. To understand how this works, lets look at the wiring on your furnaces blower. I got the sv96 100k btu 2stage furnace with variable fan and the xl18 4ton ac unit. 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. Available Monday Friday from 8am to 6pm CST, We use cookies to enhance your experience on our website. My heat is running cold! 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. Locate the speed wires. The only alternative is to raise the discharge temperature. Step 4: Take out the inducer motor. My question was whether the efficiency of heat transfer thru the exchanger would be somewhat compromised due to the reduced airflow. Typical setups include these wire colors with associated blower speeds. Certified Welder If the pressure switch is functioning properly . For business related inquires email us at info@acservicetech.com. These blower motor speeds are programmed at the manufacturer's factory for the specific equipment model number unit it is installed in. If the Delta T continues to rise, this is due to low indoor airflow. Can I retrofit a 2-speed or variable speed blower on a Payne PG8UAA forced air furnace? The blower/fan seems to be running way to fast. There are often five wire colors coming from your blower to your IFC. 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. Another common place with a schematic is on the back of the blower fan door. home improvement and repair website. One of these wires will be coming from the thermostat and the other will go to the outside unit. I connected a second thermostat to the circuit board to run the blower (R to G). These three are connected to the "Cool", "Heat", and "Fan" terminals on the control board. The company offers a variety of furnaces to suits the needs of every home. Switched it to heat (in which case the furnace board is in control of the fan, not the stat) - got fire, no fan. Air filters should be changed every 90 days unless otherwise indicated on the packaging or by the manufacturer. I know I need to replace a dying blower motor in a 1992 Trane . Bundle Packs are a great way to save and get faster shipping! Your AC or furnace is designed for a specific type of filter. The arrow should face the direction the air is flowing. Proper duct sizing can resolve the issue you are having. The induction motor begins running. Your OP was a noise complaint. The wires are several different colors. Check back regularly as we are always updating and improving thiswebsite! Trane XR80 Troubleshooting After examining the flashing system you should check the green light speed. This means that any time cooling is called for by the control board, 24v will be present on the #4 terminal of the motor module to turn the motor on and to run at roughly 1200 CFM. One of these wires will be coming from the thermostat and the other will go to the outside unit. How to tell which packages are held back due to phased updates, Linear Algebra - Linear transformation question. Access the control board. The manometer tells you the CFM number. Should I upgrade to a pcm br compatible thermostat? 4TEE3C10A1 That is excessivly loud. Again, this can usually be found in the upper-left corner. It only takes a minute to sign up. My gas furnace has two options for the blower speed: MED, and MED-HI. The house has a 3 ton trane xl20i and an xv80 (4 ton max). Use dish soap and a soft-bristle brush or sponge to remove stuck-on debris. Select Climate from the blue menu on the left side of the page. 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 wires that are used will determine the speed settings that the motor will run at. The blower energy draw at a lower speed will be offset by the loss in fan wheel inertia. To switch the jumper, you will need to hold onto it gently as you pull it out of its current setting. The air handler houses the fan and fan motor and is usually located in the basement or attic. Click On under Emergency Heat. Adjust the fan speed, and if you're still experiencing problems, contact your local American Standard Customer Care dealer. 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). When you purchase through links on our site, we may earn commissions at no cost to you. I needed to go the opposite direction and increase fan speed. You need to find the wires that determine blower speed inside your 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. 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. When changing the AC or furnace filter, the arrow should face the furnace and point away from the return duct. Choose the Trane owner guide thats specific to your unit for detailed instructions on locating and changing yourairfilter. A 1.5 ton AC unit may not be large enough to cool the . Narrowing that hysteresis loop will: Leading to a smaller Hysteresis loop, increasing motor efficiency by reducing iron eddy current losses. When you open the panel, it kills the power to the furnace. CFM stands for "cubic feet per minute." Here's hoping for some good answers. All rights reserved. My main questions are. It allows three constant fan speeds as well as an automatic fan speed and a variable burn rate and compressor and fan 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. Where To Find R-22 & R410A Leaks on AC Units! The heat exchanger can be overheated and burned out if the blower does not remove enough heat. Craig is a licensed Teacher of HVACR, Sheet Metal, and Building Maintenance in the State of New Jersey of the USA. Usually there will be three "speeds" ranging from 40 to 100% of airflow. 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. 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. 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. Check out www.acservicetech.com/store. (FYI Filter was clean and furnace was recently serviced all prior to my initial investigation of the short cycling). 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. Sign up for our email newsletter to learn helpful HVAC tips and tricks before your purchase your system. Motor is an ECM and it makes a low pitched whine sound when in CIRC or when the blower is ramping up or slowing down to stop. 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) How exactly could I test this? It shouldn't take more than a few minutes a day to record the data anyway. Turn off the emergency HVAC shutoff switch Remove top and bottom cover panels on the air handler / furnace unit (fig.5.1). After understanding what speed each tap is programmed for, we can make proper airflow adjustments. Remove battery from the thermostat (or disconnect thermostat altogether). Well, it does make sense that lowering the blower speed would reduce its electrical consumption. 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. Run a jumper from "R" to "Y2" and the blower will run continuously at the second-stage cooling speed. This X-13 model shown above designates the speeds taps as numbers, not as colors, to denote each speed. On this board, pins 3, 4, and 5 on the SW1/1 through SW1/8 dip switch block have to do with air flow. The low pitched whine stops when fan is in high speed. They have a built in or attached capacitor that will allow the motor to turn on, turn off and run at a constant speed when running. Iappreciate all the comments, questions, and responses that Ireceive from each of you. Third-stage auxiliary heating for heat pumps and multi-stage furnaces. Connect with our Customer Care team about your products, warranties, and dealer concerns. Can airtags be tracked from an iMac desktop, with no iPhone? How do I check if this furnace switch the blower to second speed. Most require that you open a box (2 screws?) Fortunately, theres a simple fix if you look at your furnaces Integrated Furnace Control (IFC) board. He has been DIY since childhood and is now a septuagenarian. - The "Continuous Fan" refers to when the G terminal is powered for the fan only to run. That will give you the most reliable results for your particular system. However, they are limited based on the total external static pressure (TESP) in the duct. That is incorrect. The MERV rating is typically printed on the filter packaging, but not necessarily on the filter itself. Check out our free Quizzes to test your knowledge here! 01 - Trane Furnace Control Board. Slowing the blower speed reduced the noise but I take it you would still like it to be more silent. Mine. 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. You can change the settings for cfm fan speed, but you have to do it manually at the board. 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. He farmed commercial garden produce for several years. He also builds custom tools for metal working. I know I need to replace a dying blower motor in a 1992 Trane XL80 gas furnace. This helps the XR80 conserve more of the heat it produces. The best answers are voted up and rise to the top, Not the answer you're looking for? It is important to know that you cant go by a normal color code to determine the speeds. Note also that there is always just "one blower" but that blower may or may not be variable speed, etc. 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. Remove the air handler. Trane. Variable speed furnaces only operate at . Copyright 1995-document.write(new Date().getFullYear()) MH Sub I, LLC dba Internet Brands. Oil Furnaces may have a temp rise of 50-60F. I.e., maybe more heat is now escaping through the exhaust. Air filters are measured by Minimum Efficiency Reporting Values (MERV). Changing your HVAC and furnace air filter is a vital part of home maintenance. Cookie Notice The BTU/HR capacity or tonnage of the air conditioning system should be included within the model number of the outdoor unit. The continuous fan is marked SW3. (Heat transfer wasn't one of my favorite classes in college - I focused more on dynamic systems, sorry.). These connected to (park) terminals, which are not used and simply hold those two additional wire speeds. Here are some of them: Better circulation of heated and cooled air. The S8X1 blower has 9 speeds. Connect the black wire to the manometer. The control board has relays that regulate the voltage to each component in the furnace. Home Improvement Stack Exchange is a question and answer site for contractors and serious DIYers. Any takers? Air Filters remove dust, lint, pet dander, and other pollutants so you can breathe easier knowing your indoor air quality is better with Trane. 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. 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. On the furnace / air handler board you should have two wires on the "Y2" connection, assuming a two-stage cooling system. Compatible with Trane systems or any standard HVAC system. Heating, Cooling, Air Conditioning, Ventilation and T-Stat Controls, 3-Speed, 4-Wire Ceiling Fan Switch Wiring. I was reading the Trane XL824 thermostat installation and setup manual. We are no longer supporting IE (Internet Explorer). Upon initial installation, these dip switches need to be adjusted for the particular unit, size, and application. 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. The ohm meter should read very close to zero. It provides quieter and more even and comfortable heat than a conventional furnace and doesnt consume electricity unnecessarily. Usually, gas furnaces have a temp rise of 50F. In order for the filter to work properly, the right size is crucial. I have a Trane Variable Speed Air Handler (TWE049E13FB2). 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. Euler: A baby on his lap, a cat on his back thats how he wrote his immortal works (origin?). The manual document include instructions and informations on how to troubleshoot the system. I have another question about my new Trane XV95 Furnace. Then switch the jumper to your desired speed. He is experienced in wood and metal construction, having designed and built several houses and metal buildings. Sometimes less cmf will give the air more time in the heat exchanger thus letting it get hotter. Continue reading to learn how to lower the fan speed. According to the company, the slower circulation speed reduces energy consumption by 75%. This will help prevent injury and damage to the furnace fan. I have posted an inquiry under the Air Conditioning forum. Match the positions to the desired pictures within the manufacturer's installation literature. If you are having problems, find your fans users manual and use it as a guide. The installation guide clearly describes how to set airflow for heating mode and cooling mode. Design Engineer/Project Manager for injection molded plastic company Learn more about Stack Overflow the company, and our products. On this motor module, the speed wires are red, orange, blue, yellow, and black. Identify those arcade games from a 1983 Brazilian music video. I want to do what is best. Related: a two stage furnace works by actually shooting less gas out, which might improve its efficiency. 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. STEP-BY-STEP REPLACEMENT GUIDE Turn off air conditioning / heat from the thermostat. 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. Turn off the power source that is connected to the furnace blower. low would be 350 CFMs/ton, medium 400 CFMs/ton, high 450 CFMs/ton. In other units, it may be 2, 3, and 4 that are programmed. Invention prototypes are another of his many accomplishments. 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. Copyright charts are usually found on the air handler inside door to controls. Remove the motor and mounting bracket. 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.". Recently I did a blower speed adjustment on the 2nd floor air handler and thought to show how it can be done. How can I check before my flight that the cloud separation requirements in VFR flight rules are met? Trane is a top rated US company of HVAC systems that offer quality and reliability. The problem is, the furnace control module doesn't use a separate speed when the unit is running in continuous FAN mode. Divide the rated Btu input by 10,000. 1995-2023 MH Sub I, LLC dba Internet Brands. This trick only works on gas furnace systems with a multi-speed blower. XB Trane Furnace: Is there a fan speed control on the unit. I think I had it on my hard drive, and the hard drive crashed on us last winter. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. The house cools off quick - too quick - and feels humid (not sure of the rh%). one room doesnt get as warm or as cool as the others. -The BTU/HR size is selectable between 48,000 42,000 36,000 or 30,000 BTU/HR. Your new AC unit is not collecting water (yet) because the anticondensation coating hasn't been compromised (yet); and that's a good thing. He owned and operated a manufacturing business building Compact Utility Vehicles for homeowner use. Luci is a contributing writer for DoItYourself.com. There is no mechanism to change this. Wires from the 16 pin plug are connected to this board. In my searching I have found out that there is a stupid little thermistor that burns out on the motor circuit board (it's a variable speed blower), and replacing it is a permanent fix.. If the control board is at fault, replace it. #3. Our Privacy Policy governs the use of your information. This lower blower speed enhances The NET difference of the above two figures is your savings or cost. There are two types of fan motors found in furnaces: 1.) Sometimes you have to add more ducts to achieve the proper pressure and velocity. The constant air turn over at a lower set point keeps the house comfortable. Ilook forward to responding to many more! 1 to 1.5 hours | Install the new motor, adjust it (multispeed and variable speed blowers only), run and test the furnace Installing a blower wheel with the motor shouldn't affect installation time, since the old wheel typically has to be removed to replace the motor. Yes--the efficiency of the heat exchanger will decrease. 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 Questions of a Do It Yourself nature should be If you really wanted to be scientific, you could perform an experiment and post the results here. Example: Rated Btu Input = 60,000 / 10,000 = 6 x 150 = 900 cfm of required furnace airflow. Is it suspicious or odd to stand by the gate of a GA airport watching the planes? bean. 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. . 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. It allows three constant fan speeds as well as an automatic fan speed and a variable burn rate and compressor and fan speed. Typical setups include these wire colors with associated blower speeds. 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. Air Conditioner + Furnace Matched Systems, Air Conditioner + Air Handler Matched Systems, Does Your Air Conditioner Smell? The heat exchanger warms up the incoming air and a blower or air handler sends the warm air throughout the home. You will need to look at what the programmed speed designations are for M1/M2/M3/M4/M5 on the wiring diagram of the HVAC unit. 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. So if you are actually moving 1250 CFM then you are at 357 CFM/ton, which is a good setup for dehumidifying. Variable Speed Blower Motor (Genteq ECM 3.0, 4 pin connector). Press Apply to save and exit. Recently I did a blower speed adjustment on the 2nd floor air. Carefully disconnect the wires from the coolant terminal, which is located on the back of the unit. 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. Each is associated with a different blower speed. There are often five wire colors coming from your blower to your IFC. American Standard air handler troubleshooting Its time to clear the air. Options are, for example, 4 minutes at 80%, or 30 seconds at 50%. You will also see the red E icon under Emergency . On my furnace the schematic showed there were three speed settings. 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. 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. Thanks for contributing an answer to Home Improvement Stack Exchange! Does lowering the blower speed of a forced-air furnace lower its efficiency? in this thread in this sub-forum in the entire site. With a one-gallon-per-hour burner nozzle that saves me AT-LEAST 30% on fuel oil plus another 20-30 min of blower run time or at least 30-50% run time savings. 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. I guess you are talking about a 3 speed direct drive motor with 1/2 shaft. Here's the sequence: Furnace gets call for heat. 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. Dave. By clicking '. Website operating I have a Trane XV90 propane furnace with a variable speed blower. These two losses comprise the magnitude of heat losses. Once you have located the panel, remove it. Warmup.com mentions that it was the original design of radiant floor heat systems by the Romans. This is done so that the maximum amount of heat is gained in the building from the refrigerant. Connect and share knowledge within a single location that is structured and easy to search. Make sure power is off when doing any adjustment. To understand how this works, let's look at the wiring on your furnace's blower. 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. 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). Comfort R should be off if you are using . Is it Covered Under Homeowners Insurance or a Home Warranty? It is about 1300-1400 sq feet, but then the basement was finished at some point, more or less doubling the square footage. - Answered by a verified HVAC Technician . How does a furnace work? The furnace operates for two minutes or so before it shuts down. If the blower motor hums, check the blower fan to ensure that it spins freely. -The "Blower-on and Blower-off delay" time period can be selected. Click System Options. No need for direct trane replacment motor.