The variable speed furnace delivers the proper amount of airflow based on the heating and cooling needs of your home. 3.5 x 400 = 1400 CFM. I know I need to replace a dying blower motor in a 1992 Trane XL80 gas furnace. The manometer tells you the CFM number. By regularly changing your filter, you can improve your indoor air quality and extend the life of your heating and cooling system. Fortunately, theres a simple fix if you look at your furnaces Integrated Furnace Control (IFC) board. Should I upgrade to a pcm br compatible thermostat? 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. Soak the filter in warm water in a bathtub or sink. Website operating The blower motor also begins running, but at low rpm. When one of the taps is powered with 24v, the motor will turn on and run at the selected speed. 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. Cross country truck driver -- over dimensional freight Click System Options. You may freely link to this site, and use it for non-commercial use subject to our terms of use. I want to increase volume flow if possible. Another key difference is that the circulate . Only 3 of the 5 colored wires may be used at a time. Is it suspicious or odd to stand by the gate of a GA airport watching the planes? Our Privacy Policy governs the use of your information. A description of how to change motor speeds with a multiple speed fan motor on an IFC controlled furnace.This video is part of the heating and cooling series of training videos made to accompany my websites: www.graycoolingman.com and www.grayfurnaceman.com to pass on what I have learned in many years of service and repair. 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. with a wiring harness for the fan. First, make sure that power is getting to the motor. Here are how my dip switches are set: Did the installer tie in a humidistat there on that V/S blower . Western VA. Nov 28, 2009. bean. The furnace operates for two minutes or so before it shuts down. This furnace features the common White-Rodgers Intell-Ignition circuit board. So if you are actually moving 1250 CFM then you are at 357 CFM/ton, which is a good setup for dehumidifying. It is about 1300-1400 sq feet, but then the basement was finished at some point, more or less doubling the square footage. problems contact webmaster@doityourself.com. #3. (FYI Filter was clean and furnace was recently serviced all prior to my initial investigation of the short cycling). Of course all that heat was lost because of the ridiculous number of vents in our foundation. Most homes have a standard split-system air conditioning unit with two main fans. 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. He is committed to outdoor cooking in a Bar-B-Q pit he welded together several years ago. If the terminals are present at the motor module (ECM X-13) you can switch speeds at the blower motor location. Your R value shouldn't change, and daily average wind speed and precipitation should have a minimal effect on the convection coefficient. When your AC unit is working properly, the blower inside your furnace or AC will blow cold air.The cold air is sent through ducts to the living areas and then returns air to be cooled by the evaporator coil. This can be done through an independent dehumidistat or through a thermostat's DEHUM terminal (if available). The system also accounts for blocked vents and dirty furnace filters, and adjusts fan speed as needed to compensate. One of these wires will be coming from the thermostat and the other will go to the outside unit. The noise is there in heat or AC. He is also an HVACR Contracting Business owner of 16 years and holds an NJ HVACR Master License. So I continued to play around with different combinations tonight. Radiant floor heat web sites are mysteriously silent on this simple and cheap modification of pre-exisiting systems to accomplish the same goal. Now, I haven't done the measurement to learn how much electricity my blower uses on low vs high. Air filters should be changed every 90 days unless otherwise indicated on the packaging or by the manufacturer. Roughly 400 CFM is needed for every 1 ton (12,000 BTU/HR) of Heat Removal Capacity in Air Conditioning Systems. 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. Connect with our Customer Care team about your products, warranties, and dealer concerns. The wires are several different colors. I just had a Trane system installed last week and I've been very happy with it! Iappreciate all the comments, questions, and responses that Ireceive from each of you. 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. Comfort R should be off if you are using . A 90 percent-plus furnace needs 150 cfm per 10,000 Btu of input. Then, carefully switch it to the setting of your choice and push it back into the control board. On this motor module, the speed wires are red, orange, blue, yellow, and black. You will also see the red E icon under Emergency . You can change the settings for cfm fan speed, but you have to do it manually at the board. Make sure power is off when doing any adjustment. Tied from R to BK in air handler. 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. 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. Select Climate from the blue menu on the left side of the page. 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. Most furnaces have a relay switch on the door cover. Well, it does make sense that lowering the blower speed would reduce its electrical consumption. HVAC filters help remove dust, dander, and harmful particles from the air inside your home. In terms of heat pumps, running the external blower faster may reduce i2r copper losses and hysteresis iron eddy current losses. Turn off power at the main electric panel. You need to follow the wiring diagram inside the HVAC unit. Why is there a voltage on my HDMI and coaxial cables? Can I retrofit a 2-speed or variable speed blower on a Payne PG8UAA forced air furnace? I have posted an inquiry under the Air Conditioning forum. 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. 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. During the awake hours I Hold the fan speed at either low or medium. My gas furnace has two options for the blower speed: MED, and MED-HI. Thus, my blower can't be using that much electricity on high. What sort of strategies would a medieval military use against a fantasy giant? According to the manufacturer's documentation, your furnace should have a 3 or 4 speed blower motor. Step 3: Adjust the Pulley on the Blower Drive Motor Usually, gas furnaces have a temp rise of 50F. The blower energy draw at a lower speed will be offset by the loss in fan wheel inertia. 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). I'm not completely convinced on this, since the claim is made by a company that sells variable speed blowers for retrofitting HVAC systems. Why do many companies reject expired SSL certificates as bugs in bug bounties? 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. Step 2: Remove the panel cover of the furnace. Based on some randomly googled comments here: http://www.inspectorsjournal.com/Forum/topic.asp?TOPIC_ID=8998& seems to agree it decreases efficiency but may increase comfort [ex: cold spots or noise level] :). New XV80 Trane furnace makes noise when blower runs at low speed. This BTU/HR capacity should be used to set the CFM for the indoor blower motor. Variable Speed Blower Motor (Genteq ECM 3.0, 4 pin connector). If the blower motor is burned out, replace it. The company offers a variety of furnaces to suits the needs of every home. The control board is communicating with the blower module in order to determine the airflow volume needed. 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. This is done so that the maximum amount of heat is gained in the building from the refrigerant. Home House & Components Systems Heating & Cooling System Air Conditioners. Possibly you could do the same here (turn down blower and gas). Euler: A baby on his lap, a cat on his back thats how he wrote his immortal works (origin?). 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. Reddit and its partners use cookies and similar technologies to provide you with a better experience. http://www.inspectorsjournal.com/Forum/topic.asp?TOPIC_ID=8998&, We've added a "Necessary cookies only" option to the cookie consent popup. I've already had a few HVAC vendors give me some specious arguments about moisture buildup, another even told me he'd "lose his license" if he touched the job. The main difference is that the fan ON setting means that the fan is set to run as long as the furnace is switched ON. The most important factor is temperature differential - the difference between the inside temperature and outside temperature. American Standard air handler troubleshooting That will give you the most reliable results for your particular system. homininet 8 mo. For example, on a package unit, only taps 3, 4 and 5 may be programmed. Does that have any impact on the efficiency of the unit? Example: Rated Btu Input = 60,000 / 10,000 = 6 x 150 = 900 cfm of required furnace airflow. I have a Carrier furnace/heat pump with an expensive control thermostat that talks directly to the heat pump. There is another way to wire this, but I can not find it back.. The boiler is feeding a DHW sidearm and furnace plenum HX. 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. A slim, removable cover will reveal the filter location. 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. The gas kicks on and is lit by the ignitor. I just moved into a house with a Trane XR80 furnace (several years old). DoItYourself.com, founded in 1995, is the leading independent Most of these are on the bottom left of the control board. Step 3: Find the furnace draft inducer. 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. 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. Choose the Trane owner guide thats specific to your unit for detailed instructions on locating and changing yourairfilter. The automatic feature rarely kicks in once at set point. Remove two screws from each bracket leg holding the motor. We have a Trane XL80 furnace manual in pdf version that you can download for free. These connected to (park) terminals, which are not used and simply hold those two additional wire speeds. Match the positions to the desired pictures within the manufacturer's installation literature. Cookie Notice Proper returns are rarely a thought. I found one glued to the back of my furnace door, one in the manual, and maybe one on-line too. XB Trane Furnace: Is there a fan speed control on the unit. The product data guide, and label on the inside panel indicate the air . Continue reading to learn how to lower the fan speed. DoItYourself.com, founded in 1995, is the leading independent home improvement and repair website. 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. Changing your HVAC and furnace air filter is a vital part of home maintenance. If you do, you may not have enough air flow over the heat exchanger, resulting in overheating and eventually a shorter exchanger life span. 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). Since I first posted this thread, my installer called Trane to get an answer to my original question. (Without enclosing my house in a climate-controlled bubble). Wires from the 16 pin plug are connected to this board. Blower on delay settings, which evidently have an impact on the duration and speed of the blower fan. The following list refers to each adjustment starting from the bottom and moving upward. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. I know that it has been done. 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. Thanks for contributing an answer to Home Improvement Stack Exchange! It had been set on the higher speed, but that was too harsh, so I lowered it to the slower speed. 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. Your new AC unit is not collecting water (yet) because the anticondensation coating hasn't been compromised (yet); and that's a good thing. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. A MERV rating speaks to the filters ability to capture large particles. The automatic feature rarely kicks in once at set point. How to use Slater Type Orbitals as a basis functions in matrix method correctly? He is experienced in wood and metal construction, having designed and built several houses and metal buildings. Test your knowledge with our 1,000 question workbook along with the answer key! Has anyone done this and can anyone give me a reason why I shouldn't do this? He also builds custom tools for metal working. It allows three constant fan speeds as well as an automatic fan speed and a variable burn rate and compressor and fan speed. Each is associated with a different blower speed. There are also red and brown furnace speed wires. 10 Reasons a Blower Fan Won't Start in a Furnace, AC or Heat Pump. 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 wires that are used will determine the speed settings that the motor will run at. 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. Identify those arcade games from a 1983 Brazilian music video. Luci is a contributing writer for DoItYourself.com. 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 suppose I probably won't do so it, but out of curiosity what kind of downside might one run into? I have another question about my new Trane XV95 Furnace. The higher the MERV rating, the better the filter is at capturing specific pollutants from the air. 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. Related: a two stage furnace works by actually shooting less gas out, which might improve its efficiency. One fan is inside the house, and one is outside the home. The MERV rating is typically printed on the filter packaging, but not necessarily on the filter itself. Cockroaches and waterbugs coming in through the vents was my big clue there. 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 I understand the reason for slowing the air to remove humidity. 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. He built every permanent building on his current homestead and did all the plumbing and electrical work. On my furnace the schematic showed there were three speed settings. I miscalculated. 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.. I'm in the process of re-wiring my blower to run on high with the furnace. So How Do We Adjust Fan Speed? I recently had have a trane xl 90 want to adjust speed of blower fan blower motor has 4 wires white going to neutral black unhooked blue to high speed yellow to I have a Trane Indoor Air Handler Model No. There is no mechanism to change this. Thanks for all your continued support! 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. Step 4: Take out the inducer motor. 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. Inventor with two patents (weight training – anti-rollback for manual wheelchair) Now that would turn the blower speed down on you. So the blower motor is dead. -The "AUX Heat" makes sure that there is enough airflow when elect strip heat is called. 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. -The "Blower-on and Blower-off delay" time period can be selected. 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. Usually there will be three speeds ranging from 40 to 100% of airflow. It is important to know that you cant go by a normal color code to determine the speeds. These blower motor versions can be found in furnaces, air handlers, and packaged units. I am currently heavily invested in studying and learning the subject as I commit myself to reducing my winter energy costs this year. Its not advisable to slow your furnace blower speed. Third-stage auxiliary heating for heat pumps and multi-stage furnaces. Helm is an accomplished DIY craftsman. By clicking '. Here's the sequence: Furnace gets call for heat. Select your preferred wire with the warm temperature and connect it to the 'heat' port. 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 simply am unable to put my hands on the schematic. Tools that we use: www.amazon.com/shop/acservicetech. Step 3. It would have no affect on the Heat settings. 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). During "Fan On", the fan runs at 50% of whatever the maximum speed of the fan is. Are there downsides to this. My first thought was that the unit was oversized, but I figured out how to check the DIP switch settings. I think that when it is in enhanced mode the fan only runs at 50%, you can try changing your dip switches to see. (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. BarnArtist, locate the wiring schematic on your furnace. The blower/fan seems to be running way to fast. Each is associated with a different blower speed. Use tab to navigate through the menu items. 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. 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. To begin, turn off the power to your furnace. The system might not work properly. Yes--the efficiency of the heat exchanger will decrease. 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 line voltage and 24v common are connected at the top and are labeled as C, L, G, N. The 24v common is C and the ground wire is G. For a 120v unit, the L is the 120v hot and the N is the 120v neutral. There are several tutorials on Youtube about how to do this step for specific inducer motor brands. To switch the jumper, you will need to hold onto it gently as you pull it out of its current setting. Change the speed. Upon initial installation, these dip switches need to be adjusted for the particular unit, size, and application. If you have any questions or need assistance, please contact Trane Home Customer Support via email at help@tranehome.com or call 1-877-288-7707, Monday-Friday 9 . The SW2 indicates the air conditioning size. If 1600 CFM is too high of an airflow volume and only 1200 CFM is needed because the system is a 36,000 BTU/HR air conditioner, we can swap the yellow with the black wire on the motor module. If you know what you are doing, it is very simple to adjust the speed of your furnace fan. Stage 3 Aux Heating. You will need to find the main cover panel on your fan. This control board is out of a variable speed furnace with a modulating gas valve that has a variable speed inducer motor. 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. One of these wires will be coming from the thermostat and the other will go to the outside unit. CFM stands for "cubic feet per minute." It allows three constant fan speeds as well as an automatic fan speed and a variable burn rate and compressor and fan speed. maryland_irisman 14 years ago As suggested by the others, you should balance the air flow and the fan cfm should be matched to the system and duct system. Does lowering the blower speed of a forced-air furnace lower its efficiency? Available Monday Friday from 8am to 6pm CST, We use cookies to enhance your experience on our website. There are often five wire colors coming from your blower to your IFC. (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.) No problem with the boiler. In humid climates, 350 CFM per ton can be selected in order to remove more moisture from the air. Recently I did a blower speed adjustment on the 2nd floor air. You need to find the wires that determine blower speed inside your furnace. 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. 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 (. These adjustments can be made by pulling the single wire connector and moving it to another single tab positioned horizontally in each row. For this reason, pair your Variable Speed AC unit with one of the following components: Hyperion TAM9 Air Handler, XC 80 Gas Furnace, XC 95M Furnace, or S9V2. These three are connected to the "Cool", "Heat", and "Fan" terminals on the control board. Asking for help, clarification, or responding to other answers. Heres What It Means, Why You Should Monitor the Humidity Levels In Your Home. In the manual, it lists some settings, e.g. Before you begin this process it is a good idea to make sure that no power is going to the fan. Remove both of these wires and wire nut them together.