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. You will need to find the main cover panel on your fan. I am just clueless, could it be the thermostat (really old) or something that is going to cost a billion dollars to fix? 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. Thanks for the reply. Air Filter - Be sure to check the air filter and replace if necessary. @Dave: Those were my thoughts as well. Can this be adjusted Therefore I again adjusted the speed upward a bit and that seemingly has corrected the problem. Step 3: Find the furnace draft inducer. 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. For example, on a package unit, only taps 3, 4 and 5 may be programmed. I guess you are talking about a 3 speed direct drive motor with 1/2 shaft. Trane. Black: High; Yellow: Medium-high ; Blue or brown: Medium-low; Red: Low; Top Ten Interview Tips to Land that HVAC/R Job! Helm is an accomplished DIY craftsman. I just moved into a house with a Trane XR80 furnace (several years old). Questions of a Do It Yourself nature should be submitted to our "DoItYourself.com Community Forums". Locate the speed wires. 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. Bundle Packs are a great way to save and get faster shipping! Make sure power is off when doing any adjustment. Comfort R should be off if you are using . It offers three settings: 525 RPM for saving energy, 900 RPM for heating, or 1100 RPM for air conditioning. 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). We have been heating the crawl space in our house for several winters because the ductwork was all torn up from rats. He built every permanent building on his current homestead and did all the plumbing and electrical work. the module must be a trane furnace model specific programmed and is available separate from the motor. Again, this can usually be found in the upper-left corner. 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. There are two types of fan motors found in furnaces: 1.) Heating, Cooling, Air Conditioning, Ventilation and T-Stat Controls, 3-Speed, 4-Wire Ceiling Fan Switch Wiring. 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) Your new AC unit is not collecting water (yet) because the anticondensation coating hasn't been compromised (yet); and that's a good thing. The manual document include instructions and informations on how to troubleshoot the 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. 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. Most require that you open a box (2 screws?) However, they are limited based on the total external static pressure (TESP) in the duct. Now that would turn the blower speed down on you. 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. This furnace features the common White-Rodgers Intell-Ignition circuit board. H.R. Which thermostat wires control the furnace fan? Variable Speed Blower Motor ( Genteq 2.3, 16 pin connector). Narrowing that hysteresis loop will: Leading to a smaller Hysteresis loop, increasing motor efficiency by reducing iron eddy current losses. lower efficiency furnace) it is drafting exhaust up the flue which can't be good. Air filters are typically found behind the return vent door, often located in the ceiling or wall in the central portion of your home. My first thought was that the unit was oversized, but I figured out how to check the DIP switch settings. When you open the panel, it kills the power to the furnace. Your R value shouldn't change, and daily average wind speed and precipitation should have a minimal effect on the convection coefficient. It helps to have over 50 years of farming and ranching experience. On the motor, only one of the 5 numbered taps has 24v power at a time based on the speed desired at the control board. The constant air turn over at a lower set point keeps the house comfortable. 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. The ignitor glows. in this thread in this sub-forum in the entire site. 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. HVAC system for small church has twin Trane XR90 units installed in 2009 to replace a unit with a much larger single blower. These adjustments can be made by pulling the single wire connector and moving it to another single tab positioned horizontally in each row. To switch the jumper, you will need to hold onto it gently as you pull it out of its current setting. *Based on third party testing of particle removal efficiency down to 0.3 microns (2005). The noise of forced air is annoying. and our PSC - The Permanent Split Capacitor Motor is still the most commonly used. 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 MERV rating is typically printed on the filter packaging, but not necessarily on the filter itself. 3.5 x 400 = 1400 CFM. Website operating 1 to 1.5 hours | Install the new motor, adjust it (multispeed and variable speed blowers only), run and test the furnace Installing a blower wheel with the motor shouldn't affect installation time, since the old wheel typically has to be removed to replace the motor. Ilook forward to responding to many more! . I know that it has been done. Remove the air handler. Changing the fan wire connection between the fan-on relay and the fan motor, selecting a high, medium, or low speed right on the fan motor itself Changing jumper positions on the control board (printed circuit board shown below) in the air handler Changing a dip switch or small slider switch position provided on some air handler control boards You should now see a red E icon in the System Mode screen next to Auto and Heating modes. Variable speed furnaces only operate at . 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. Does a summoned creature play immediately after being summoned by a ready action? Is it Covered Under Homeowners Insurance or a Home Warranty? You may freely link home improvement and repair website. 80% would be great for me. This will allow you to access the control board. 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. 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.. American Standard air handler troubleshooting Access the control board. I think that when it is in enhanced mode the fan only runs at 50%, you can try changing your dip switches to see. View our Privacy Policy here. Adjusting the Airflow Speed on ECM Blower Fan Motors! By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. Mine has a wall switch. 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 One fan is inside the house, and one is outside the home. Available from Trane Dealers in select locations. This covers speed adjustment on a PSC motor. Thanks for all your continued support! They have a built in or attached capacitor that will allow the motor to turn on, turn off and run at a constant speed when running. For business related inquires email us at info@acservicetech.com. -The "System Type" is the CFM per ton to be adjusted between low, normal and high. These blower motor versions can be found in furnaces, air handlers, and packaged units. The blower energy draw at a lower speed will be offset by the loss in fan wheel inertia. The induction motor begins running. I think I had it on my hard drive, and the hard drive crashed on us last winter. If there isnt one in your home, turn it off at the breaker box. low would be 350 CFMs/ton, medium 400 CFMs/ton, high 450 CFMs/ton. 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. 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. During the awake hours I Hold the fan speed at either low or medium. Allow the filter to completely dry before returning it to the device. Step 3: Adjust the Pulley on the Blower Drive Motor HVAC filters help remove dust, dander, and harmful particles from the air inside your home. New XV80 Trane furnace makes noise when blower runs at low speed. 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. So I continued to play around with different combinations tonight. If the blower motor is burned out, replace it. 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. Here are some of them: Better circulation of heated and cooled air. The air handler houses the fan and fan motor and is usually located in the basement or attic. The system also accounts for blocked vents and dirty furnace filters, and adjusts fan speed as needed to compensate. The installation instructions for this furnace are needed in order to be able to know how to set these dip switches. You have to switch the wires to the blower motor. Here are how my dip switches are set: Did the installer tie in a humidistat there on that V/S blower . These connected to (park) terminals, which are not used and simply hold those two additional wire speeds. Employment/Education Highlights Can airtags be tracked from an iMac desktop, with no iPhone? The boiler is feeding a DHW sidearm and furnace plenum HX. Note also that there is always just "one blower" but that blower may or may not be variable speed, etc. One thing I found consistently was that making changes on the RS-485 hydro heat control board and W1-W3 jumpering had notable effects (more CFM's at my test register) while messing with the mainboard DIP switches had little to no effect. This will help prevent injury and. Switched it to heat (in which case the furnace board is in control of the fan, not the stat) - got fire, no fan. 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. You can verify the actual CFM by measuring the TESP of the system and comparing it to the manufacturer's airflow data sheet. The arrow should face the direction the air is flowing. 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. The house cools off quick - too quick - and feels humid (not sure of the rh%). and as I recall, you have the HW VP IAQ stat. 10 Reasons a Blower Fan Won't Start in a Furnace, AC or Heat Pump. Can a furnace with a variable speed blower be used in a multistory house? Each is associated with a different blower speed. Soak the filter in warm water in a bathtub or sink. Another key difference is that the circulate . The continuous fan is marked SW3. Recently I did a blower speed adjustment on the 2nd floor air handler and thought to show how it can be done. 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. The following list refers to each adjustment starting from the bottom and moving upward. The noise is there in heat or AC. I have a Carrier furnace/heat pump with an expensive control thermostat that talks directly to the heat pump. Measured the temperature of the air before the coil and after the coil and used DeltaT (change in temperature) to determine the blower setting. That will give you the most reliable results for your particular system. I simply am unable to put my hands on the schematic. We welcome your comments and Then switch the jumper to your desired speed. I want to increase volume flow if possible. That said the contractor has no real incentive to get it right. Usually there will be three "speeds" ranging from 40 to 100% of airflow. It had been set on the higher speed, but that was too harsh, so I lowered it to the slower speed. 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. 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. If you need assistance determining the best filter for your unit, a Trane employee would be happy to assist you. But, in looking up the manual for this furnace (TUD1B100A9361), it looks like there are 4 blower speeds. He has been DIY since childhood and is now a septuagenarian. Typical setups include these wire colors with associated blower speeds. It was working a week ago but just recently when it runs it blows out cold air. I'm getting a new s9v2. Typical setups include these wire colors with associated blower speeds. If you have suggestions or comments they are welcome. We are no longer supporting IE (Internet Explorer) as we strive to provide site experiences for browsers that support new web standards and security practices. But I guess my question is, can the air flow problem really be a simple as upping the blower speed? Stage 2 Aux Heating. I'll edit my answer and include the exact parameters I'd record every day for a thorough study. Put the air handler back. The higher the MERV rating, the better the filter is at capturing specific pollutants from the air. 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. The blower/fan seems to be running way to fast. I think the best bet would be to actually test it for a few months and see. He is also an HVACR Contracting Business owner of 16 years and holds an NJ HVACR Master License. DoItYourself.com, founded in 1995, is the leading independent home improvement and repair website. I suppose I probably won't do so it, but out of curiosity what kind of downside might one run into? Most of these are on the bottom left of the control board. Questions of a Do It Yourself nature should be A slim, removable cover will reveal the filter location. These are not switched off but are live all the time. When changing the AC or furnace filter, the arrow should face the furnace and point away from the return duct. Can you increase the speed of an ECM AC blower? This control board is out of a variable speed furnace with a modulating gas valve that has a variable speed inducer motor. Air Conditioner + Furnace Matched Systems, Air Conditioner + Air Handler Matched Systems, Does Your Air Conditioner Smell? Batch split images vertically in half, sequentially numbering the output files, Using indicator constraint with two variables. All information is provided "AS IS." You need to find the wires that determine blower speed inside your furnace. 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.