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#3. 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. She has experience researching and creating a wide range of home improvement and garden projects, and especially enjoys learning about fireplaces and exterior design. They do this by coupling a sophisticated, programmable thermostat to a variable-speed motor. 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. 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. 4TEE3C10A1 That is excessivly loud. I have posted an inquiry under the Air Conditioning forum. AC Service Tech HVAC Training is made possible by continued support from our visitors, customers, and support from these Sponsors! The A/C will run according to the thermostat settings. XV18 TruComfort Variable Speed Air Conditioner - Trane Residential Is it Covered Under Homeowners Insurance or a Home Warranty? 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? 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. A dirty air filter can cause your HVAC system to go into overdrive and result in costly energy bills. How to Change Air Handler Fan Speed | Hunker Electric Furnace Sequencer Replacement Instructions for Home Repair Blower fan will not run: A failing sequencer may have a burnt contact and is unable to switch the fan and heating coils ON. Should I Run Furnace Fan on AUTO or Circulate? - HouseholdAir Adjusting the Airflow Speed on ECM Blower Fan Motors! 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. This value is then multiplied by 150 cfm to obtain the required airflow for the furnace in heating operation. Additionally, they can be identified by the presence of a removable module/bell on the end of the motor. 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. STEP-BY-STEP REPLACEMENT GUIDE Turn off air conditioning / heat from the thermostat. The gas kicks on and is lit by the ignitor. We have a Trane XL80 furnace manual in pdf version that you can download for free. The automatic feature rarely kicks in once at set point. Proper returns are rarely a thought. The airflow adjustments on this board are pictured below. Mine. Air filters are typically found behind the return vent door, often located in the ceiling or wall in the central portion of your home. suggestions. Craig is a licensed Teacher of HVACR, Sheet Metal, and Building Maintenance in the State of New Jersey of the USA. 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. Yes: you will save electricity costs by running your blower on low. Measured the temperature of the air before the coil and after the coil and used DeltaT (change in temperature) to determine the blower setting. (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.) The variable speed furnace delivers the proper amount of airflow based on the heating and cooling needs of your home. 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. On the furnace / air handler board you should have two wires on the "Y2" connection, assuming a two-stage cooling system. Before you begin this process it is a good idea to make sure that no power is going to the fan. This is NOT a user servicable item. Test the new speed. Connect the ohm meter to the pressure switch. The wire's color will determine the speed settings that the motor will run at. In humid climates, 350 CFM per ton can be selected in order to remove more moisture from the air. In the manual, it lists some settings, e.g. ASE Certified Master Auto Technician The MERV rating is typically printed on the filter packaging, but not necessarily on the filter itself. You need to follow the wiring diagram inside the HVAC unit. It is a Trane S8X1 single stage furnace and air handler, paired with an XR16 3 ton AC unit. Western VA. Nov 28, 2009. 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. It was working a week ago but just recently when it runs it blows out cold air. If you have not read that yet, I would encourage you to do so! All information is provided "AS IS." If the terminals are present at the motor module (ECM X-13) you can switch speeds at the blower motor location. Each is associated with a different blower 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. Sometimes less cmf will give the air more time in the heat exchanger thus letting it get hotter. Trane s9v2 should thermostat control blower speed? - HVAC-Talk: Heating To switch the jumper, you will need to hold onto it gently as you pull it out of its current setting. 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. Another common place with a schematic is on the back of the blower fan door. Cross country truck driver -- over dimensional freight I found one glued to the back of my furnace door, one in the manual, and maybe one on-line too. 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. After a bit of research, (translated: "mad google skills") I found an article claiming that lowering the blower speed may increase efficiency. The arrow should point toward the unit. I guess you are talking about a 3 speed direct drive motor with 1/2 shaft. Possible to change Trane XR80 blower speed? : r/hvacadvice XB Trane Furnace: Is there a fan speed control on the unit. A second filter location for most HVAC systems and furnaces is the air handler portion of the system. Since hot air is much lighter . 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. If you want to learn about refrigerants and how they work in a system, check out our Refrigerant Charging and Service Procedures for Air Conditioning book . 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. I think the best bet would be to actually test it for a few months and see. 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). That will give you the most reliable results for your particular system. 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. How to change "Fan On" speed on a variable speed blower There are also red and brown furnace speed wires. 1995-2023 MH Sub I, LLC dba Internet Brands. The noise is there in heat or AC. Secure the old speed wire by twisting a wire nut over the end. My first thought was that the unit was oversized, but I figured out how to check the DIP switch settings. 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. hvac - Why is my furnace blower running at low speed? - Home How to Replace a Trane Blower Motor - Part 2 - AllThumbsDIY.com Any takers? He is committed to outdoor cooking in a Bar-B-Q pit he welded together several years ago. (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. To understand how this works, let's look at the wiring on your furnace's blower. 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. Trane. We also have quick reference cards for use out in the field! Copyright 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. Can I retrofit a 2-speed or variable speed blower on a Payne PG8UAA Once you have located the panel, remove it. If the blower motor hums, check the blower fan to ensure that it spins freely. The induction motor begins running. 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. and our If the ohm meter comes back with an open line reading, the switch is bad and needs replaced. If you are a homeowner looking to repair your own appliance, understand that the voltages can be lethal, the fuels are highly flammable and high pressures are used. Adjust blower/fan speed from Thermostat? - HVAC-Talk: Heating, Air Yes you can change it, how to do it is in the manual, yes there can be downsides, no it probably won't fix your air balancing issues. The remaining colored wires are the speed selectors for this blower motor.). Employment/Education Highlights DoItYourself.com, founded in 1995, is the leading independent home improvement and repair website. New XV80 Trane furnace makes noise when blower runs at low speed. The S8X1 blower has 9 speeds. He owned and operated a manufacturing business building Compact Utility Vehicles for homeowner use. I want to do what is best. This will help prevent injury and. 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. Press Apply to save and exit. Euler: A baby on his lap, a cat on his back thats how he wrote his immortal works (origin?). These two losses comprise the magnitude of heat losses. The factory may only set two or three of these colors as actual speeds. I have a Carrier furnace/heat pump with an expensive control thermostat that talks directly to the heat pump. I think that when it is in enhanced mode the fan only runs at 50%, you can try changing your dip switches to see. There are often five wire colors coming from your blower to your IFC. I have another question about my new Trane XV95 Furnace. It is important to know that you cant go by a normal color code to determine the speeds. Step 3: Adjust the Pulley on the Blower Drive Motor Stage 2 Aux Heating. There is no humidistat. For more information, please see our This furnace features the common White-Rodgers Intell-Ignition circuit board. Connect the black wire to the manometer. . Typically the colors are: White = neutral speed Red = low speed Yellow = medium speed Black = high speed Access the control board. Can a furnace with a variable speed blower be used in a multistory house? On this board, pins 3, 4, and 5 on the SW1/1 through SW1/8 dip switch block have to do with air flow. 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. This will help prevent injury and damage to the furnace fan. 81K views 2 years ago 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. Most homes are best served by a filter with a MERV rating of 8 to 13, but refer to your system's user manual or with a Trane employee for guidance. The higher the MERV rating, the better the filter is at capturing specific pollutants from the air. 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. Follow us on Facebook for Quick Tips and Updates here! This covers speed adjustment on a PSC motor. Reddit and its partners use cookies and similar technologies to provide you with a better experience. How to use Slater Type Orbitals as a basis functions in matrix method correctly? The low pitched whine stops when fan is in high speed. Locate the speed wires. bean. Electric Furnace Sequencer Replacement Instructions for Home Repair By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. @Dave: Those were my thoughts as well. Luci is a contributing writer for DoItYourself.com. Soak the filter in warm water in a bathtub or sink. If you do, you may not have enough air flow over the heat exchanger, resulting in overheating and eventually a shorter exchanger life span. I suppose I probably won't do so it, but out of curiosity what kind of downside might one run into? Why is there a voltage on my HDMI and coaxial cables? 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. Now that its gotten cold, we've noticed that several of the heat register barely have any air coming out of them. One fan is inside the house, and one is outside the home. He farmed commercial garden produce for several years. Here are how my dip switches are set: Did the installer tie in a humidistat there on that V/S blower . Check out www.acservicetech.com/store. See our Privacy Policy for more information. One of these wires will be coming from the thermostat and the other will go to the outside unit. the module must be a trane furnace model specific programmed and is available separate from the motor. Air filters should be changed every 90 days unless otherwise indicated on the packaging or by the manufacturer. The blower energy draw at a lower speed will be offset by the loss in fan wheel inertia. A continuous green light means the IFC circuit board needs replacing. Running your furnace fan all the time isn't exactly a bad thing. 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. The boiler is feeding a DHW sidearm and furnace plenum HX. Slowing the blower speed reduced the noise but I take it you would still like it to be more silent. Variable Speed Blower Motor ( Genteq 2.3, 16 pin connector). It wasn't the noise that was bothering me, it was the desert-like sensation of swirling dry air.