Mine has a wall switch. Usually there will be three "speeds" ranging from 40 to 100% of airflow. Switched it to heat (in which case the furnace board is in control of the fan, not the stat) - got fire, no fan. He is committed to outdoor cooking in a Bar-B-Q pit he welded together several years ago. I'm also a little concerned that this furnace might be a little undersized for our house (if I understand correctly, its a 100 BTU unit). 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. Website operating problems contact Webmaster. Well, it does make sense that lowering the blower speed would reduce its electrical consumption. These connected to (park) terminals, which are not used and simply hold those two additional wire speeds. 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. Does a summoned creature play immediately after being summoned by a ready action? Solution: Install a new sequencer AND a new fan relay, just to be safe. When changing the AC or furnace filter, the arrow should face the furnace and point away from the return duct. If the blower motor hums, check the blower fan to ensure that it spins freely. By pressing "submit", I understand that I am providing express consent for Trane Residential to contact me about this request or similar topics. He has been DIY since childhood and is now a septuagenarian. 3 of the wires will likely terminate with just a twist on cap. 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. I'm getting a new s9v2. 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). By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. By clicking '. You can change the settings for cfm fan speed, but you have to do it manually at the 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. Typical setups include these wire colors with associated blower speeds. Step 4: Take out the inducer motor. I'm in the process of re-wiring my blower to run on high with the furnace. Again, this can usually be found in the upper-left corner. Turn off the power source that is connected to the furnace blower. If you have not read that yet, I would encourage you to do so! If there isnt one in your home, turn it off at the breaker box. *NOTE* If you attempt this, be absolutely sure that you have no power going to your system, especially before changing wires. To clean a reusable filter, remove the filter from the air cleaning device. HVAC filters help remove dust, dander, and harmful particles from the air inside your home. These blower motor speeds are programmed at the manufacturer's factory for the specific equipment model number unit it is installed in. All rights reserved. In terms of heat pumps, running the external blower faster may reduce i2r copper losses and hysteresis iron eddy current losses. So How Do We Adjust Fan Speed? The fan speed is very low when not heating/cooling. When you purchase through links on our site, we may earn commissions at no cost to you. Turn off the emergency HVAC shutoff switch Remove top and bottom cover panels on the air handler / furnace unit (fig.5.1). 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 had been set on the higher speed, but that was too harsh, so I lowered it to the slower speed. This is done so that the maximum amount of heat is gained in the building from the refrigerant. (Heat transfer wasn't one of my favorite classes in college - I focused more on dynamic systems, sorry.). 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. When the R-G circuit is made, the blower motor operates on heating speed. At night with an even lower set point I switch the fan speed to automatic. H.R. This will show what speed each numbered tap is programmed as. The remaining colored wires are the speed selectors for this blower motor.). The furnace operates for two minutes or so before it shuts down. By Pressing submit, I consent that my information be shared with Trane approved affiliates and third party partners, including connecting me with a local Trane dealer to be contacted about products and services. The house has a 3 ton trane xl20i and an xv80 (4 ton max). Each is associated with a different blower speed. So I continued to play around with different combinations tonight. Shay Tilander is a senior editor at Family Handyman. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. These blower motor versions can be found in furnaces, air handlers, and packaged units. But I'm reasonably sure it uses less to run on high vs low then it uses to run on low vs OFF. Remove battery from the thermostat (or disconnect thermostat altogether). 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. Click System Options. I do know that my entire furnace runs safely on a 15amp breaker with the blower on high, the burner running, the humidifier running, and the water pump to empty the humidifier running. This will increase the number. Turn off power at the main electric panel. CFM stands for "cubic feet per minute." 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. Remember that CFM stands for Cubic Feet Per Minute. During "Fan On", the fan runs at 50% of whatever the maximum speed of the fan is. I connected a second thermostat to the circuit board to run the blower (R to G). The arrow should face the direction the air is flowing. On this board, pins 3, 4, and 5 on the SW1/1 through SW1/8 dip switch block have to do with air flow. Trane is a top rated US company of HVAC systems that offer quality and reliability. How does a furnace work? How do I check if this furnace switch the blower to second speed. My gas furnace has two options for the blower speed: MED, and MED-HI. 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. Each is associated with a different blower speed. Comfort R should be off if you are using . As a side note, lowering furnace (heating) blower speed should apparently only be done if it doesn't reduce the "heat rise" (difference in temperature between the intake and supply air, if I understand it, also known as the "delta T") past the manufacturer recommended value for that furnace. It was working a week ago but just recently when it runs it blows out cold air. Carefully disconnect the wires from the coolant terminal, which is located on the back of the unit. enjoys making jams and jellies during fruit season along with cooking meals. Trane XR80 Troubleshooting After examining the flashing system you should check the green light speed. 01 - Trane Furnace Control Board. How to Lower the Ouptut of Oversized Furnace. If you have an HVACR relatedquestion, drop it in the comment section of one of theYouTube videos at theAC Service Tech YouTube Channel and I will do my best to respond. First, make sure that power is getting to the motor. There is another way to wire this, but I can not find it back.. I want to do what is best. I'm not in enhanced mode. Since I first posted this thread, my installer called Trane to get an answer to my original question. Proper returns are rarely a thought. PSC - The Permanent Split Capacitor Motor is still the most commonly used. The wire's color will determine the speed settings that the motor will run at. This will help prevent injury and. The noise of forced air is annoying. The house cools off quick - too quick - and feels humid (not sure of the rh%). low would be 350 CFMs/ton, medium 400 CFMs/ton, high 450 CFMs/ton. 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. The gas is shut off and the induction motor stops running while the blower . Remove both of these wires and wire nut them together. He is experienced in wood and metal construction, having designed and built several houses and metal buildings. 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! Our Privacy Policy governs the use of your information. 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. Locate your thermostat on the page and click System Mode. Western VA. Nov 28, 2009. 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). You need to find the wires that determine blower speed inside your furnace. 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. Has anyone done this and can anyone give me a reason why I shouldn't do this? The ohm meter should read very close to zero. Tied from R to BK in air handler. and our The heat exchanger warms up the incoming air and a blower or air handler sends the warm air throughout the home. If the furnace manufacturer supplies different burners for that unit you may be risking premature failure. rev2023.3.3.43278. I am just clueless, could it be the thermostat (really old) or something that is going to cost a billion dollars to fix? Then switch the jumper to your desired speed. Only swap these two wires. Click On under Emergency Heat. We have a Trane XL80 furnace manual in pdf version that you can download for free. 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. Now, I haven't done the measurement to learn how much electricity my blower uses on low vs high. It would have no affect on the Heat settings. Options are, for example, 4 minutes at 80%, or 30 seconds at 50%. I think that when it is in enhanced mode the fan only runs at 50%, you can try changing your dip switches to see. Dave. The problem is, the furnace control module doesn't use a separate speed when the unit is running in continuous FAN mode. R and BK are tied together. I have another question about my new Trane XV95 Furnace. This lower blower speed enhances Cut the wire's terminal connector off with wire cutters. You will need to find the main cover panel on your fan. ECM Multi-Speed Blower Motor (Genteq X-13). The wires that are used will determine the speed settings that the motor will run at. How can I check before my flight that the cloud separation requirements in VFR flight rules are met? How to use Slater Type Orbitals as a basis functions in matrix method correctly? These three are connected to the "Cool", "Heat", and "Fan" terminals on the control board. Narrowing that hysteresis loop will: Leading to a smaller Hysteresis loop, increasing motor efficiency by reducing iron eddy current losses. Yes: you will save electricity costs by running your blower on low. In order for the filter to work properly, the right size is crucial. A dirty air filter can cause your HVAC system to go into overdrive and result in costly energy bills. Design Engineer/Project Manager for injection molded plastic company There are often five wire colors coming from your blower to your IFC. If you remove the common and place it on another terminal, it can burn out your motor not how you want the new furnace season to begin. 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. 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. Changing your HVAC and furnace air filter is a vital part of home maintenance. I'll just run the heat pump through the leaky ductwork and heat the crawl space. A slim, removable cover will reveal the filter location. The hot air will rise and heat the floor from beneath, a DIY form of radiant floor heating. A second filter location for most HVAC systems and furnaces is the air handler portion of the system. Variable speed furnaces only operate at . A continuous green light means the IFC circuit board needs replacing. Thanks for all your continued support! After a bit of research, (translated: "mad google skills") I found an article claiming that lowering the blower speed may increase efficiency. 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). I guess you are talking about a 3 speed direct drive motor with 1/2 shaft. When changing the AC or furnace filter, the arrow should face the furnace and point away from the return duct. 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? Continue reading to learn how to lower the fan speed. Can a furnace with a variable speed blower be used in a multistory house? You should now see a red E icon in the System Mode screen next to Auto and Heating modes. You can verify the actual CFM by measuring the TESP of the system and comparing it to the manufacturer's airflow data sheet. If you do, you may not have enough air flow over the heat exchanger, resulting in overheating and eventually a shorter exchanger life span. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. The control board has relays that regulate the voltage to each component in the furnace. Before you begin this process it is a good idea to make sure that no power is going to the fan. On this control board, there are multiple adjustments for the airflow speeds. The low pitched whine stops when fan is in high speed. Adjust the fan speed, and if you're still experiencing problems, contact your local American Standard Customer Care dealer. you will get the better dehumidification with the lower setting. 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. Proper duct sizing can resolve the issue you are having. I think the best bet would be to actually test it for a few months and see. I have posted an inquiry under the Air Conditioning forum. Thanks for contributing an answer to Home Improvement Stack Exchange! 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. Website operating This helps the XR80 conserve more of the heat it produces. 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. Use dish soap and a soft-bristle brush or sponge to remove stuck-on debris. 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. 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. Here's hoping for some good answers. One fan is inside the house, and one is outside the home. All information is provided "AS IS." The manometer tells you the CFM number. It allows three constant fan speeds as well as an automatic fan speed and a variable burn rate and compressor and fan speed. 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. I Tried a Hands-Free Dog Leash, and I No Longer Dread Walking My Dog, This Simple Trick Can Refresh Your Entire Home, 30 Spring Cleaning Tasks to Add to Your Checklist, Do not Sell or Share My Personal Information. 80% would be great for me. Employment/Education Highlights one room doesnt get as warm or as cool as the others. For 240v units, both the L and N are hots. Heating, Cooling, Air Conditioning, Ventilation and T-Stat Controls, 3-Speed, 4-Wire Ceiling Fan Switch Wiring. homininet 8 mo. He built every permanent building on his current homestead and did all the plumbing and electrical work. Most homes have a standard split-system air conditioning unit with two main fans. One of these wires will be coming from the thermostat and the other will go to the outside unit.