-The "Blower-on and Blower-off delay" time period can be selected. Warmup.com mentions that it was the original design of radiant floor heat systems by the Romans. We have been heating the crawl space in our house for several winters because the ductwork was all torn up from rats. Continue reading to learn how to lower the 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. Choose the Trane owner guide thats specific to your unit for detailed instructions on locating and changing yourairfilter. He also builds custom tools for metal working. I understand the reason for slowing the air to remove humidity. Allow the filter to completely dry before returning it to the device. Which thermostat wires control the furnace fan? For more information, please see our you will get the better dehumidification with the lower setting. Top 10 Spots! When changing the AC or furnace filter, the arrow should face the furnace and point away from the return duct. Narrowing that hysteresis loop will: Leading to a smaller Hysteresis loop, increasing motor efficiency by reducing iron eddy current losses. These are not switched off but are live all the time. I installed a Thermo Control 2000 boiler and first fired it up this Friday. According to the company, the slower circulation speed reduces energy consumption by 75%. Yes, there is a way to bring up the speed on the air handler.. The house cools off quick - too quick - and feels humid (not sure of the rh%). You will also see the red E icon under Emergency . 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. 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. The automatic feature rarely kicks in once at set point. If power is getting to the blower motor, but the motor does not run, the motor may be burned out. 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.". Thanks for contributing an answer to Home Improvement Stack Exchange! Running your furnace fan all the time isn't exactly a bad thing. He maintains fruit and nut trees along with helping his wife with a vegetable garden. Only swap these two wires. One of these wires will be coming from the thermostat and the other will go to the outside unit. I want to do what is best. Slowly flashing shows your furnace is on and does not need heat. The A/C will run according to the thermostat settings. 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 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. No need for direct trane replacment motor. Here's hoping for some good answers. In humid climates, 350 CFM per ton can be selected in order to remove more moisture from the air. But I'm reasonably sure it uses less to run on high vs low then it uses to run on low vs OFF. By pressing "submit", I understand that I am providing express consent for Trane Residential to contact me about this request or similar topics. How to tell which packages are held back due to phased updates, Linear Algebra - Linear transformation question. Is it Covered Under Homeowners Insurance or a Home Warranty? On this motor module, the speed wires are red, orange, blue, yellow, and black. Trane is a top rated US company of HVAC systems that offer quality and reliability. The BTU/HR capacity or tonnage of the air conditioning system should be included within the model number of the outdoor unit. A dirty air filter can cause your HVAC system to go into overdrive and result in costly energy bills. Turn off the power source that is connected to the furnace blower. *Based on third party testing of particle removal efficiency down to 0.3 microns (2005). Here are how my dip switches are set: Did the installer tie in a humidistat there on that V/S blower . Here's what to record, in order of importance: The last two (5 and 6) aren't as important, but more data is always better. Here are some of them: Better circulation of heated and cooled air. Locate the speed wires. My gas furnace has two options for the blower speed: MED, and MED-HI. The wires are several different colors. the module must be a trane furnace model specific programmed and is available separate from the motor. Sign up for our email newsletter to learn helpful HVAC tips and tricks before your purchase your system. Remember that CFM stands for Cubic Feet Per Minute. We are no longer supporting IE (Internet Explorer). How can I check before my flight that the cloud separation requirements in VFR flight rules are met? This value is then multiplied by 150 cfm to obtain the required airflow for the furnace in heating operation. Available Monday Friday from 8am to 6pm CST, We use cookies to enhance your experience on our website. 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. These three are connected to the "Cool", "Heat", and "Fan" terminals on the control board. 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. Step 3: Adjust the Pulley on the Blower Drive Motor The constant torque/multispeed motor will have the smallest module. This is done so that the maximum amount of heat is gained in the building from the refrigerant. with a wiring harness for the fan. I can unsubscribe and opt-out from future communications at any time. 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. 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. Well, it does make sense that lowering the blower speed would reduce its electrical consumption. I found one glued to the back of my furnace door, one in the manual, and maybe one on-line too. Why is my furnace blower running at low speed? Most require that you open a box (2 screws?) If the pressure switch is functioning properly . He is committed to outdoor cooking in a Bar-B-Q pit he welded together several years ago. 80% would be great for me. BarnArtist, locate the wiring schematic on your furnace. Second-stage auxiliary heating for heat pumps and multi-stage furnaces. Most furnaces have a relay switch on the door cover. That said the contractor has no real incentive to get it right. Bus Driver/Substitute Teacher Now that would turn the blower speed down on you. In order to measure air flow you could use a flow capture hood, a rotating vane anemometer, or a hot wire anemometer. A MERV rating speaks to the filters ability to capture large particles. I know I need to replace a dying blower motor in a 1992 Trane XL80 gas furnace. A MERV 16 filters particles at a level near that or a HEPA. He is experienced in wood and metal construction, having designed and built several houses and metal buildings. Air filters should be changed every 90 days unless otherwise indicated on the packaging or by the manufacturer. Filters help protect the many parts of your heating and cooling unit from debris and buildup that can shorten the working life of the system. How to change the fan motor speed on a gas furnace grayfurnaceman 148K subscribers Subscribe 190K views 10 years ago Furnace blowers A description of how to change motor speeds with a. 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.. *NOTE* If you attempt this, be absolutely sure that you have no power going to your system, especially before changing wires. I just had a Trane system installed last week and I've been very happy with it! in this thread in this sub-forum in the entire site. In other units, it may be 2, 3, and 4 that are programmed. Move the high-speed wire to low. To learn more, see our tips on writing great answers. rev2023.3.3.43278. There is no mechanism to change this. Note also that there is always just "one blower" but that blower may or may not be variable speed, etc. The following list refers to each adjustment starting from the bottom and moving upward. At night with an . Recently I did a blower speed adjustment on the 2nd floor air. Top Ten Interview Tips to Land that HVAC/R Job! The video will also explain other safety measures, as well as some for a demonstration which I will show. Heating, Cooling, Air Conditioning, Ventilation and T-Stat Controls, 3-Speed, 4-Wire Ceiling Fan Switch Wiring. 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. Thoroughly rinse the filter. 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 Thanks for all your continued support! When the R-G circuit is made, the blower motor operates on heating speed. A 1.5 ton AC unit may not be large enough to cool the . ECM Multi-Speed Blower Motor (Genteq X-13). So clearly, running your furnace blower on low is only more efficient IF-and-ONLY-IF the cost of the heating fuel is much much less then the cost of the electricity to run the blower that little bit faster. All information is provided "AS IS." Should I upgrade to a pcm br compatible thermostat? The system might not work properly. The blower is set for 400 cfm for a 4 ton outdoor unit, and comfort-R is not enabled (all factory). . But the 'real' one will be the one connected with a twist on cap to the fan motor. For example, on a package unit, only taps 3, 4 and 5 may be programmed. These blower motor versions can be found in furnaces, air handlers, and packaged units. ECM Multi-Speed Blower Motor (Broad Ocean Type), For an ECM blower motor with wires exiting the module (shown above), the speed is changed at the control board by moving the colored wire terminals. On my furnace the schematic showed there were three speed settings. I needed to go the opposite direction and increase fan speed. 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 . If you have a plug instead (ECM Broad Ocean) you can only make the adjustment at the control board or at the plug terminals at the end of the wiring. submitted to our "DoItYourself.com Community Forums". These blower motor speeds are programmed at the manufacturer's factory for the specific equipment model number unit it is installed in. Trane s9v2 should thermostat control blower speed? All rights reserved. I'm in the process of re-wiring my blower to run on high with the furnace. I think that when it is in enhanced mode the fan only runs at 50%, you can try changing your dip switches to see. Roughly 400 CFM is needed for every 1 ton (12,000 BTU/HR) of Heat Removal Capacity in Air Conditioning Systems. DoItYourself.com, founded in 1995, is the leading independent home improvement and repair website. One of these wires will be coming from the thermostat and the other will go to the outside unit. 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. I'm also going to go through and make sure there are no visible leaks or damage to them. 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. 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. The arrow should point toward the unit. A 90 percent-plus furnace needs 150 cfm per 10,000 Btu of input. This helps the XR80 conserve more of the heat it produces. http://www.inspectorsjournal.com/Forum/topic.asp?TOPIC_ID=8998&, We've added a "Necessary cookies only" option to the cookie consent popup. (Heat transfer wasn't one of my favorite classes in college - I focused more on dynamic systems, sorry.). Being an bms/controls guy I rarely have enough cfm in large buildings. Third-stage auxiliary heating for heat pumps and multi-stage furnaces. suggestions. I'm getting a new s9v2. Mutually exclusive execution using std::atomic? Check out our free Quizzes to test your knowledge here! However, if your HVAC blower motor isn't too badly damaged, the technician may be able to clean and repair it so you won't have to incur the cost of a replacement. 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. It had been set on the higher speed, but that was too harsh, so I lowered it to the slower 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 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? How does a furnace work? 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. - Answered by a verified HVAC Technician . and our 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. Is it suspicious or odd to stand by the gate of a GA airport watching the planes? The low pitched whine stops when fan is in high speed. Cut the wire's terminal connector off with wire cutters. 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. HVAC system for small church has twin Trane XR90 units installed in 2009 to replace a unit with a much larger single blower. How do I check if this furnace switch the blower to second speed. Cross country truck driver -- over dimensional freight It allows three constant fan speeds as well as an automatic fan speed and a variable burn rate and compressor and fan speed. I want to increase volume flow if possible. Meanwhile, the Circulate setting is a hybrid and auto that keeps the fan running throughout heating cycles and then again for a few minutes every hour even when the furnace is off. By regularly changing your filter, you can improve your indoor air quality and extend the life of your heating and cooling system. Change the speed. 3.5 x 400 = 1400 CFM. 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. 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. Has anyone done this and can anyone give me a reason why I shouldn't do this? Press Apply to save and exit. Remove both of these wires and wire nut them together. Western VA. Nov 28, 2009. What actually happened was that it caused the furnace to short cycle, running for about 4.5 minutes then shutting off and immediately turning on again over and over until it reached the set point. The noise of forced air is annoying. -The BTU/HR size is selectable between 48,000 42,000 36,000 or 30,000 BTU/HR. There are several tutorials on Youtube about how to do this step for specific inducer motor brands. Solution: Install a new sequencer AND a new fan relay, just to be safe. Usually there will be three "speeds" ranging from 40 to 100% of airflow. 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) I have a Trane XV90 propane furnace with a variable speed blower. Iappreciate all the comments, questions, and responses that Ireceive from each of you. The blower/fan seems to be running way to fast. Identify the blower fan and the speed wires. There are often five wire colors coming from your blower to your IFC. It is a Trane S8X1 single stage furnace and air handler, paired with an XR16 3 ton AC unit. Turn off the emergency HVAC shutoff switch Remove top and bottom cover panels on the air handler / furnace unit (fig.5.1). Why is there a voltage on my HDMI and coaxial cables? You can change the settings for cfm fan speed, but you have to do it manually at the board. When you purchase through links on our site, we may earn commissions at no cost to you. Each is associated with a different blower 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. 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). Match the positions to the desired pictures within the manufacturer's installation literature. On this control board, there are multiple adjustments for the airflow speeds. The blower energy draw at a lower speed will be offset by the loss in fan wheel inertia. I'll just run the heat pump through the leaky ductwork and heat the crawl space. 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. He is also an HVACR Contracting Business owner of 16 years and holds an NJ HVACR Master License. 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). I'm not in enhanced mode. Test the new speed. DoItYourself.com, founded in 1995, is the leading independent 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). H.R. Are there downsides to this. Since hot air is much lighter . PSC - The Permanent Split Capacitor Motor is still the most commonly used. However, I like the continually run the fan to even out air temperature in the house. 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] :). By clicking '. In order for the filter to work properly, the right size is crucial. R and BK are tied together. A continuous green light means the IFC circuit board needs replacing. Typical setups include these wire colors with associated blower speeds. You may freely link The furnace operates for two minutes or so before it shuts down. Only 3 of the 5 colored wires may be used at a time. 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. Thus, my blower can't be using that much electricity on high. The S8X1 blower has 9 speeds. The induction motor begins running. (Without enclosing my house in a climate-controlled bubble). If the Delta T continues to rise, this is due to low indoor airflow. We welcome your comments and In the example of an ECM 3.0 with a 4 pin connector, the wires are not switched or moved to adjust the airflow settings. 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. Yes: you will save electricity costs by running your blower on low. I know I need to replace a dying blower motor in a 1992 Trane . It provides quieter and more even and comfortable heat than a conventional furnace and doesnt consume electricity unnecessarily. However, a higher MERV rating may not be best for your system. Step 3. (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! Secure the old speed wire by twisting a wire nut over the end. This will increase the number. 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. 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. If the ohm meter comes back with an open line reading, the switch is bad and needs replaced. Shay Tilander is a senior editor at Family Handyman. -The "AUX Heat" makes sure that there is enough airflow when elect strip heat is called. Wires from the 16 pin plug are connected to this board. (FYI Filter was clean and furnace was recently serviced all prior to my initial investigation of the short cycling). The NET difference of the above two figures is your savings or cost. Its time to clear the air. video below! This will show what speed each numbered tap is programmed as. 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. Cookie Notice Each is associated with a different blower speed. To clean a reusable filter, remove the filter from the air cleaning device. Batch split images vertically in half, sequentially numbering the output files, Using indicator constraint with two variables. 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. There are often five wire colors coming from your blower to your IFC. Make sure power is off when doing any adjustment. I just moved into a house with a Trane XR80 furnace (several years old). Step 2: Create a Safe Workspace When working with any unit connected to electricity, it's important to turn off the power to prevent electrocution and damage to your furnace. If you have suggestions or comments they are welcome. Can airtags be tracked from an iMac desktop, with no iPhone? The most important factor is temperature differential - the difference between the inside temperature and outside temperature. Step 3: Find the furnace draft inducer. 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. During the awake hours I Hold the fan speed at either low or medium. I'll edit my answer and include the exact parameters I'd record every day for a thorough study. The airflow adjustments on this board are pictured below. Available from Trane Dealers in select locations. 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. My main questions are. The same is true when changing the air duct filter. 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. It was working a week ago but just recently when it runs it blows out cold air. Air Conditioner + Furnace Matched Systems, Air Conditioner + Air Handler Matched Systems, Does Your Air Conditioner Smell? Variable Speed Blower Motor ( Genteq 2.3, 16 pin connector). Since I first posted this thread, my installer called Trane to get an answer to my original question. Now, I haven't done the measurement to learn how much electricity my blower uses on low vs high. Cockroaches and waterbugs coming in through the vents was my big clue there. How exactly could I test this? By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. When one of the taps is powered with 24v, the motor will turn on and run at the selected speed. Switched it to heat (in which case the furnace board is in control of the fan, not the stat) - got fire, no fan. Click On under Emergency Heat. Trane. Remove the motor and mounting bracket. Therefore I again adjusted the speed upward a bit and that seemingly has corrected the problem. I have posted an inquiry under the Air Conditioning forum. 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. In Dungeon World, is the Bard's Arcane Art subject to the same failure outcomes as other spells? 10 Reasons a Blower Fan Won't Start in a Furnace, AC or Heat Pump. Recently I did a blower speed adjustment on the 2nd floor air handler and thought to show how it can be done. You could also use the Temp Rise Formula which you can learn about in our "HVAC Temp Rise Formula used to Measure Airflow CFM" video. But, in looking up the manual for this furnace (TUD1B100A9361), it looks like there are 4 blower speeds. Employment/Education Highlights They do this by coupling a sophisticated, programmable thermostat to a variable-speed motor. This covers speed adjustment on a PSC motor. Craig creates educational HVACR articles and videos which are posted at https://www.acservicetech.com & https://www.youtube.com/acservicetechchannel & https://www.facebook.com/acservicetech/.
