To switch the jumper, you will need to hold onto it gently as you pull it out of its current setting. 3 of the wires will likely terminate with just a twist on cap. Anyone? Does lowering the blower speed of a forced-air furnace lower its efficiency? Trane XR80 Troubleshooting After examining the flashing system you should check the green light speed. 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. On this board, pins 3, 4, and 5 on the SW1/1 through SW1/8 dip switch block have to do with air flow. It is important to know that you cant go by a normal color code to determine the speeds. During the awake hours I Hold the fan speed at either low or medium. Check out our free Quizzes to test your knowledge here! I am currently heavily invested in studying and learning the subject as I commit myself to reducing my winter energy costs this year. Learn more about Stack Overflow the company, and our products. Heat exchange takes time. 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. Typical setups include these wire colors with associated blower speeds. This will show what speed each numbered tap is programmed as. The gas is shut off and the induction motor stops running while the blower . Thanks for all your continued support! Top Ten Interview Tips to Land that HVAC/R Job! The blower energy draw at a lower speed will be offset by the loss in fan wheel inertia. 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. Stack Exchange network consists of 181 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Here's the sequence: Furnace gets call for heat. If the pressure switch is functioning properly . Most of these are on the bottom left of the control board. Can I retrofit a 2-speed or variable speed blower on a Payne PG8UAA forced air furnace? Typical setups include these wire colors with associated blower speeds. The installation instructions for this furnace are needed in order to be able to know how to set these dip switches. No need for direct trane replacment motor. A MERV 16 filters particles at a level near that or a HEPA. New XV80 Trane furnace makes noise when blower runs at low speed. The manometer tells you the CFM number. Blower on delay settings, which evidently have an impact on the duration and speed of the blower fan. Before you begin this process it is a good idea to make sure that no power is going to the fan. lower efficiency furnace) it is drafting exhaust up the flue which can't be good. It provides quieter and more even and comfortable heat than a conventional furnace and doesnt consume electricity unnecessarily. 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. 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 blower is set for 400 cfm for a 4 ton outdoor unit, and comfort-R is not enabled (all factory). Step 3. Again, this can usually be found in the upper-left corner. 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. #3. Being an bms/controls guy I rarely have enough cfm in large buildings. 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. You can change the settings for cfm fan speed, but you have to do it manually at the board. Stage 3 Aux Heating. in this thread in this sub-forum in the entire site. Most homes have a standard split-system air conditioning unit with two main fans. You will also see the red E icon under Emergency . The A/C will run according to the thermostat settings. Air filters are typically found behind the return vent door, often located in the ceiling or wall in the central portion of your home. I can unsubscribe and opt-out from future communications at any time. So I continued to play around with different combinations tonight. 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. I connected a second thermostat to the circuit board to run the blower (R to G). Use dish soap and a soft-bristle brush or sponge to remove stuck-on debris. One of these wires will be coming from the thermostat and the other will go to the outside unit. The house cools off quick - too quick - and feels humid (not sure of the rh%). The control board is communicating with the blower module in order to determine the airflow volume needed. I want to do what is best. It would have no affect on the Heat settings. I could imagine possibly fewer "warm up cycles" (which also include having to power on the fan) might save something (as well as lower fan speed=less electricity)but as others have noted, while its running (esp. Note also that there is always just "one blower" but that blower may or may not be variable speed, etc. If the furnace manufacturer supplies different burners for that unit you may be risking premature failure. A second filter location for most HVAC systems and furnaces is the air handler portion of the system. 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. Step 4: Take out the inducer motor. 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. Mine. Sometimes you have to add more ducts to achieve the proper pressure and velocity. http://www.inspectorsjournal.com/Forum/topic.asp?TOPIC_ID=8998&, We've added a "Necessary cookies only" option to the cookie consent popup. The SW2 indicates the air conditioning size. It had been set on the higher speed, but that was too harsh, so I lowered it to the slower speed. We recommend our users to update the browser. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. You have to switch the wires to the blower motor. Each is associated with a different blower speed. A 1.5 ton AC unit may not be large enough to cool the . Website operating American Standard air handler troubleshooting 80% would be great for me. However, I like the continually run the fan to even out air temperature in the house. Can this be adjusted Now, I haven't done the measurement to learn how much electricity my blower uses on low vs high. Move the high-speed wire to low. In other units, it may be 2, 3, and 4 that are programmed. There are two types of fan motors found in furnaces: 1.) 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. The most important factor is temperature differential - the difference between the inside temperature and outside temperature. He is experienced in wood and metal construction, having designed and built several houses and metal buildings. Privacy Policy. My main questions are. Locate the speed wires. A MERV rating speaks to the filters ability to capture large particles. (new Image()).src = 'https://capi.connatix.com/tr/si?token=2ba02a33-c319-4410-bba7-f8321a13bed3&cid=877050e7-52c9-4c33-a20b-d8301a08f96d'; cnxps.cmd.push(function () { cnxps({ playerId: "2ba02a33-c319-4410-bba7-f8321a13bed3" }).render("00499ba9282e4d1b985fa8af14d29c2b"); }); On my furnace IFC, the black (high speed) wire is connected to the air conditioning (cool) terminal, and yellow (medium-high speed) is connected to the (heat) terminal. I know I need to replace a dying blower motor in a 1992 Trane XL80 gas furnace. Craig is a licensed Teacher of HVACR, Sheet Metal, and Building Maintenance in the State of New Jersey of the USA. Then, carefully switch it to the setting of your choice and push it back into the control board. Remove the motor and mounting bracket. Another common place with a schematic is on the back of the blower fan door. Check back regularly as we are always updating and improving thiswebsite! There are several tutorials on Youtube about how to do this step for specific inducer motor brands. I think that when it is in enhanced mode the fan only runs at 50%, you can try changing your dip switches to see. 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 "AC/HP CFM Adjust" is the airflow volume to be set for system, efficiency, comfort. I'm not in enhanced mode. He also builds custom tools for metal working. It is about 1300-1400 sq feet, but then the basement was finished at some point, more or less doubling the square footage. I assume you are speaking about dip switch settings. If the terminals are present at the motor module (ECM X-13) you can switch speeds at the blower motor location. We have a Trane XL80 furnace manual in pdf version that you can download for free. There is no mechanism to change this. Tools that we use: www.amazon.com/shop/acservicetech. When you open the panel, it kills the power to the furnace. The low pitched whine stops when fan is in high speed. Second-stage auxiliary heating for heat pumps and multi-stage furnaces. Running your furnace fan all the time isn't exactly a bad thing. If you are having problems, find your fans users manual and use it as a guide. Trane s9v2 should thermostat control blower speed? The following list refers to each adjustment starting from the bottom and moving upward. Additionally, they can be identified by the presence of a removable module/bell on the end of the motor. In the example above, an ECM 2.3 16 pin variable speed motor is connected to an air handler control board. Why are Suriname, Belize, and Guinea-Bissau classified as "Small Island Developing States"? However, they are limited based on the total external static pressure (TESP) in the duct. Run a jumper from "R" to "Y2" and the blower will run continuously at the second-stage cooling speed. Which thermostat wires control the furnace fan? I have a Trane Variable Speed Air Handler (TWE049E13FB2). (Although it wouldn't hurt to record those too.) The fan speed is controlled on the control board for the furnace. Switch the Jumper On most control boards there will be a jumper that is marked to show that it controls the speed. If you have suggestions or comments they are welcome. There are also red and brown furnace speed wires. The system also accounts for blocked vents and dirty furnace filters, and adjusts fan speed as needed to compensate. (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. 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. How does a furnace work? ago. The constant air turn over at a lower set point keeps the house comfortable. air flow is inadequate to match demand and duct size. 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. . 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. 1995-2023 MH Sub I, LLC dba Internet Brands. Why do many companies reject expired SSL certificates as bugs in bug bounties? When it is flashing fast there is heat throughout your home. Luci is a contributing writer for DoItYourself.com. I.e., maybe more heat is now escaping through the exhaust. With a one-gallon-per-hour burner nozzle that saves me AT-LEAST 30% on fuel oil plus another 20-30 min of blower run time or at least 30-50% run time savings. 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 noise is there in heat or AC. Thanks for contributing an answer to Home Improvement Stack Exchange! When changing the AC or furnace filter, the arrow should face the furnace and point away from the return duct. 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 . I simply am unable to put my hands on the schematic. 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. 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.