This is NOT a user servicable item. Copyright If the terminals are present at the motor module (ECM X-13) you can switch speeds at the blower motor location. 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. You will need to find the main cover panel on your fan. I assume you are speaking about dip switch settings. 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. The variable speed furnace delivers the proper amount of airflow based on the heating and cooling needs of your home. The company offers a variety of furnaces to suits the needs of every home. Since hot air is much lighter . By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. BarnArtist, locate the wiring schematic on your furnace. 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. However, a higher MERV rating may not be best for your system. He currently has a home shop where he sharpens and rebuilds saws, repairs lawn mowers, mobility scooters, hydraulic jacks, and anything else that comes along. It is a Trane S8X1 single stage furnace and air handler, paired with an XR16 3 ton AC unit. Batch split images vertically in half, sequentially numbering the output files, Using indicator constraint with two variables. Click On under Emergency Heat. When you purchase through links on our site, we may earn commissions at no cost to you. Learn more about Stack Overflow the company, and our products. air flow is inadequate to match demand and duct size. The automatic feature rarely kicks in once at set point. 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. and our Turn off the emergency HVAC shutoff switch Remove top and bottom cover panels on the air handler / furnace unit (fig.5.1). For example, on a package unit, only taps 3, 4 and 5 may be programmed. The MERV scale rates filters from 1 to 16. Remove the air handler. Fortunately, theres a simple fix if you look at your furnaces Integrated Furnace Control (IFC) board. Make sure power is off when doing any adjustment. Can you increase the speed of an ECM AC blower? There are also red and brown furnace speed wires. The product data guide, and label on the inside panel indicate the air . R and BK are tied together. Is it suspicious or odd to stand by the gate of a GA airport watching the planes? The heat exchanger can be overheated and burned out if the blower does not remove enough heat. But I'm reasonably sure it uses less to run on high vs low then it uses to run on low vs OFF. 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 humid climates, 350 CFM per ton can be selected in order to remove more moisture from the air. Select your preferred wire with the warm temperature and connect it to the 'heat' port. I simply am unable to put my hands on the schematic. Once you have located the panel, remove it. Slowing the blower speed reduced the noise but I take it you would still like it to be more silent. It provides quieter and more even and comfortable heat than a conventional furnace and doesnt consume electricity unnecessarily. The fan speed is very low when not heating/cooling. Thanks for all your continued support! Trane. Know your limits. Possibly you could do the same here (turn down blower and gas). 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. It only takes a minute to sign up. Western VA. Nov 28, 2009. It would have no affect on the Heat settings. It shouldn't take more than a few minutes a day to record the data anyway. 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. 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. If you really wanted to be scientific, you could perform an experiment and post the results here. On most control boards there will be a jumper that is marked to show that it controls the speed. The control board has relays that regulate the voltage to each component in the furnace. 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. 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. 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. Typically the colors are: White = neutral speed Red = low speed Yellow = medium speed Black = high speed The system might not work properly. Heat exchange takes time. The furnace operates for two minutes or so before it shuts down. These adjustments can be made by pulling the single wire connector and moving it to another single tab positioned horizontally in each row. The blower/fan seems to be running way to fast. We have been heating the crawl space in our house for several winters because the ductwork was all torn up from rats. At night with an even lower set point I switch the fan speed to automatic. How can I check before my flight that the cloud separation requirements in VFR flight rules are met? 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. They do this by coupling a sophisticated, programmable thermostat to a variable-speed motor. Typical setups include these wire colors with associated blower speeds. Check back regularly as we are always updating and improving thiswebsite! How to Convert a Furnace Blower Fan Into a Stand Alone Fan, What to Do When a Furnace Blower Fan Won't Start, How to Replace the Resistor on Air Conditioner Blower Fans. I'm also going to go through and make sure there are no visible leaks or damage to them. 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. But you will have a tough time measuring either on your basement Trane. Shay Tilander is a senior editor at Family Handyman. Top Ten Interview Tips to Land that HVAC/R Job! 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). But I guess my question is, can the air flow problem really be a simple as upping the blower speed? 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. It was working a week ago but just recently when it runs it blows out cold air. HVAC system for small church has twin Trane XR90 units installed in 2009 to replace a unit with a much larger single blower. Air filters are measured by Minimum Efficiency Reporting Values (MERV). 1995-2023 MH Sub I, LLC dba Internet Brands. Air Filters remove dust, lint, pet dander, and other pollutants so you can breathe easier knowing your indoor air quality is better with Trane. If the pressure switch is functioning properly . Trane XR80 Troubleshooting After examining the flashing system you should check the green light speed. This covers speed adjustment on a PSC motor. Heres What It Means, Why You Should Monitor the Humidity Levels In Your Home. Usually, gas furnaces have a temp rise of 50F. Yes, there is a way to bring up the speed on the air handler.. Is it Covered Under Homeowners Insurance or a Home Warranty? I am just clueless, could it be the thermostat (really old) or something that is going to cost a billion dollars to fix? Before you begin this process it is a good idea to make sure that no power is going to the fan. Again, this can usually be found in the upper-left corner. A slim, removable cover will reveal the filter location. Can a furnace with a variable speed blower be used in a multistory house? Stage 3 Aux Heating. to this site, and use it for non-commercial use subject to our terms of use. Remove two screws from each bracket leg holding the motor. in this thread in this sub-forum in the entire site. Trane is a top rated US company of HVAC systems that offer quality and reliability. I'd like to get some second opinions. 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. How does a furnace work? Are there downsides to this. Access the control board. Does lowering the blower speed of a forced-air furnace lower its efficiency? The house has a 3 ton trane xl20i and an xv80 (4 ton max). I'm not completely convinced on this, since the claim is made by a company that sells variable speed blowers for retrofitting HVAC systems. We are no longer supporting IE (Internet Explorer). Air filters are typically found behind the return vent door, often located in the ceiling or wall in the central portion of your home. It allows three constant fan speeds as well as an automatic fan speed and a variable burn rate and compressor and fan speed. Only swap these two wires. Turn off power at the main electric panel. Website operating problems contact Webmaster. . No: you will not save on gas/oil costs by running your blower on low. American Standard air handler troubleshooting Top 10 Spots! Reddit and its partners use cookies and similar technologies to provide you with a better experience. 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. I understand the reason for slowing the air to remove humidity. 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. 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. 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. Dealers can answer questions, help you find the right products for your home, and repair your system. New XV80 Trane furnace makes noise when blower runs at low speed. 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. Adjusting the Airflow Speed on ECM Blower Fan Motors! Its not advisable to slow your furnace blower speed. All information is provided "AS IS." 01 - Trane Furnace Control Board. Check out our free Quizzes to test your knowledge here! Does that have any impact on the efficiency of the unit? Most of these are on the bottom left of the control board. 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) 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. Run a jumper from "R" to "Y2" and the blower will run continuously at the second-stage cooling speed. Invention prototypes are another of his many accomplishments. 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). 10 Reasons a Blower Fan Won't Start in a Furnace, AC or Heat Pump. I am currently heavily invested in studying and learning the subject as I commit myself to reducing my winter energy costs this year. This can be done through an independent dehumidistat or through a thermostat's DEHUM terminal (if available). The BTU/HR capacity or tonnage of the air conditioning system should be included within the model number of the outdoor unit. Put the air handler back. Sign up for our email newsletter to learn helpful HVAC tips and tricks before your purchase your 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. Thoroughly rinse the filter. This will show what speed each numbered tap is programmed as. I have a Trane Variable Speed Air Handler (TWE049E13FB2). The arrow should point toward the unit. How exactly could I test this? To subscribe to this RSS feed, copy and paste this URL into your RSS reader. That will give you the most reliable results for your particular system. If you want to solve the air noise problem, move the return air filters out of their hallway locations back to the upstream side of the return air duct at the furnace. All rights reserved. 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. ECM Multi-Speed Blower Motor (Genteq X-13). Compatible with Trane systems or any standard HVAC system. He built every permanent building on his current homestead and did all the plumbing and electrical work. Test the new speed. The best answers are voted up and rise to the top, Not the answer you're looking for? If the Delta T continues to rise, this is due to low indoor airflow. That is incorrect. I think I had it on my hard drive, and the hard drive crashed on us last winter. The installation guide clearly describes how to set airflow for heating mode and cooling mode. However, they are limited based on the total external static pressure (TESP) in the duct. 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. Questions of a Do It Yourself nature should be submitted to our "DoItYourself.com Community Forums". H.R. To understand how this works, lets look at the wiring on your furnaces blower. Cut the wire's terminal connector off with wire cutters. Click System Options. The ignitor glows. 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. 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 noise is there in heat or AC. There is another way to wire this, but I can not find it back.. I hope this helps you understand how to adjust the airflow speed on ECM Blower Motors! Why do many companies reject expired SSL certificates as bugs in bug bounties? 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 Yes--the efficiency of the heat exchanger will decrease. you will get the better dehumidification with the lower setting. problems contact webmaster@doityourself.com. Asking for help, clarification, or responding to other answers. (Without enclosing my house in a climate-controlled bubble). 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. There are often five wire colors coming from your blower to your IFC. After a bit of research, (translated: "mad google skills") I found an article claiming that lowering the blower speed may increase efficiency. Connect the black wire to the manometer. Upon initial installation, these dip switches need to be adjusted for the particular unit, size, and application. Disconnect between goals and daily tasksIs it me, or the industry? - Answered by a verified HVAC Technician . On the furnace / air handler board you should have two wires on the "Y2" connection, assuming a two-stage cooling system. A MERV rating speaks to the filters ability to capture large particles. I guess you are talking about a 3 speed direct drive motor with 1/2 shaft. The wires that are used will determine the speed settings that the motor will run at. Bundle Packs are a great way to save and get faster shipping! Move the high-speed wire to low. Usually there will be three speeds ranging from 40 to 100% of airflow. To understand how this works, let's look at the wiring on your furnace's blower. I know that it has been done. 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 also accounts for blocked vents and dirty furnace filters, and adjusts fan speed as needed to compensate. Solution: Install a new sequencer AND a new fan relay, just to be safe. In the manual, it lists some settings, e.g. When the humidity is high for what its set at. Select Climate from the blue menu on the left side of the page. Sometimes you have to add more ducts to achieve the proper pressure and velocity. Soak the filter in warm water in a bathtub or sink. 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. Can airtags be tracked from an iMac desktop, with no iPhone? Bus Driver/Substitute Teacher It allows three constant fan speeds as well as an automatic fan speed and a variable burn rate and compressor and fan speed. 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. Use tab to navigate through the menu items. It offers three settings: 525 RPM for saving energy, 900 RPM for heating, or 1100 RPM for air conditioning. The only alternative is to raise the discharge temperature. View our Privacy Policy here. A second filter location for most HVAC systems and furnaces is the air handler portion of the system. A continuous green light means the IFC circuit board needs replacing. These connected to (park) terminals, which are not used and simply hold those two additional wire speeds. Anyone? My main questions are. The arrow should face the direction the air is flowing. 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. I want to increase volume flow if possible. Now that would turn the blower speed down on you. If there isnt one in your home, turn it off at the breaker box. This is a follow-up to our other article on "Adjusting the Furnace/AC Airflow Speed on a 120v PSC Blower Motor". Narrowing that hysteresis loop will: Leading to a smaller Hysteresis loop, increasing motor efficiency by reducing iron eddy current losses. By clicking '. When the R-G circuit is made, the blower motor operates on heating speed. He has been DIY since childhood and is now a septuagenarian. He owned and operated a manufacturing business building Compact Utility Vehicles for homeowner use. On this board, pins 3, 4, and 5 on the SW1/1 through SW1/8 dip switch block have to do with air flow. with a wiring harness for the fan. The constant air turn over at a lower set point keeps the house comfortable. The higher the MERV rating, the better the filter is at capturing specific pollutants from the air. Variable Speed Blower Motor ( Genteq 2.3, 16 pin connector). This trick only works on gas furnace systems with a multi-speed blower. All Logos & Trademark Belongs To Their Respective Owners, Maintaining temperature over a longer period of time is more efficient than getting a room to temperature quickly, A lower fan speed ensures your heat pump will run for longer periods of time which is required for the system to go into whats called a defrost mode (. Its time to clear the air. The airflow adjustments on this board are pictured below. View our Privacy Policy here. 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.". Follow us on Facebook for Quick Tips and Updates here! These blower motor speeds are programmed at the manufacturer's factory for the specific equipment model number unit it is installed in. I've already had a few HVAC vendors give me some specious arguments about moisture buildup, another even told me he'd "lose his license" if he touched the job. I connected a second thermostat to the circuit board to run the blower (R to G). When you open the panel, it kills the power to the furnace. It accounts for the amount of air in circulation for precision airflow. The arrow should face the direction the air is flowing. Connect and share knowledge within a single location that is structured and easy to search.