rev2023.3.3.43278. I got the sv96 100k btu 2stage furnace with variable fan and the xl18 4ton ac unit. ECM Multi-Speed Blower Motor (Genteq X-13). Upon initial installation, these dip switches need to be adjusted for the particular unit, size, and application. I think I had it on my hard drive, and the hard drive crashed on us last winter. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Heres What It Means, Why You Should Monitor the Humidity Levels In Your Home. Cookie Notice The remaining colored wires will be default speeds. This furnace features the common White-Rodgers Intell-Ignition circuit board. charts are usually found on the air handler inside door to controls. -The "AUX Heat" makes sure that there is enough airflow when elect strip heat is called. My question was whether the efficiency of heat transfer thru the exchanger would be somewhat compromised due to the reduced airflow. According to the company, the slower circulation speed reduces energy consumption by 75%. What sort of strategies would a medieval military use against a fantasy giant? Connect the black wire to the manometer. with a wiring harness for the fan. The wires that are used will determine the speed settings that the motor will run at. To adjust the dip switches, turn the power off and take a flat head screw driver to lightly push the dip switches to the on/off desired position for each numbered switch. The blower is set for 400 cfm for a 4 ton outdoor unit, and comfort-R is not enabled (all factory). The blower motor also begins running, but at low rpm. 4TEE3C10A1 That is excessivly loud. The constant air turn over at a lower set point keeps the house comfortable. The same is true when changing the air duct filter. So if you are actually moving 1250 CFM then you are at 357 CFM/ton, which is a good setup for dehumidifying. 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. 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. Craig is a licensed Teacher of HVACR, Sheet Metal, and Building Maintenance in the State of New Jersey of the USA. The fan speed is controlled on the control board for the furnace. 10 Reasons a Blower Fan Won't Start in a Furnace, AC or Heat Pump. (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. Recently I did a blower speed adjustment on the 2nd floor air handler and thought to show how it can be done. At night with an . The fan speed is very low when not heating/cooling. Helm is an accomplished DIY craftsman. I have another question about my new Trane XV95 Furnace. You should now see a red E icon in the System Mode screen next to Auto and Heating modes. In the example above, an ECM 2.3 16 pin variable speed motor is connected to an air handler control board. Another common place with a schematic is on the back of the blower fan door. bean. On this motor module, the speed wires are red, orange, blue, yellow, and black. Secure the old speed wire by twisting a wire nut over the end. 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. 80% would be great for me. Proper returns are rarely a thought. 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. Follow us on Facebook for Quick Tips and Updates here! Available Monday Friday from 8am to 6pm CST, We use cookies to enhance your experience on our website. Typical setups include these wire colors with associated blower speeds. Most require that you open a box (2 screws?) In a gas furnace, (the most common type of furnace used in homes) natural gas is ignited in the burner and the flames heat up the heat exchanger. Copyright 1995-document.write(new Date().getFullYear()) MH Sub I, LLC dba Internet Brands. A slim, removable cover will reveal the filter location. Air Filter - Be sure to check the air filter and replace if necessary. A MERV rating speaks to the filters ability to capture large particles. The blower speed for a gas heater is selected so that it is comfortable for the building occupant but also so that the Delta T (Temp Rise) does not continue to rise. Allow the filter to completely dry before returning it to the device. For business related inquires email us at info@acservicetech.com. She has experience researching and creating a wide range of home improvement and garden projects, and especially enjoys learning about fireplaces and exterior design. There are two types of fan motors found in furnaces: 1.) Then switch the jumper to your desired speed. During "Fan On", the fan runs at 50% of whatever the maximum speed of the fan is. The wires are several different colors. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Why is there a voltage on my HDMI and coaxial cables? The ignitor glows. I'm not completely convinced on this, since the claim is made by a company that sells variable speed blowers for retrofitting HVAC systems. On this board, pins 3, 4, and 5 on the SW1/1 through SW1/8 dip switch block have to do with air flow. . The company offers a variety of furnaces to suits the needs of every home. Divide the rated Btu input by 10,000. Western VA. Nov 28, 2009. Your R value shouldn't change, and daily average wind speed and precipitation should have a minimal effect on the convection coefficient. Is it suspicious or odd to stand by the gate of a GA airport watching the planes? 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. Dealers can answer questions, help you find the right products for your home, and repair your system. Why is my furnace blower running at low speed? 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. How to Lower the Ouptut of Oversized Furnace. See our Privacy Policy for more information. Yes, there is a way to bring up the speed on the air handler.. 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). Each is associated with a different blower speed. 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. For 240v units, both the L and N are hots. 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. The gas is shut off and the induction motor stops running while the blower . Now that would turn the blower speed down on you. Use tab to navigate through the menu items. 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) Connect the common wire to the neutral terminal of the furnace's control board. Trane. Please note that mounting bracket consists of top and bottom brackets joined by 6 metal screws (fig.6.9). I found one glued to the back of my furnace door, one in the manual, and maybe one on-line too. Measured the temperature of the air before the coil and after the coil and used DeltaT (change in temperature) to determine the blower setting. 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. H.R. Thanks for contributing an answer to Home Improvement Stack Exchange! 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. -The BTU/HR size is selectable between 48,000 42,000 36,000 or 30,000 BTU/HR. Select your preferred wire with the warm temperature and connect it to the 'heat' port. It accounts for the amount of air in circulation for precision airflow. The arrow should face the direction the air is flowing. In order to measure air flow you could use a flow capture hood, a rotating vane anemometer, or a hot wire anemometer. - Answered by a verified HVAC Technician . The air handler houses the fan and fan motor and is usually located in the basement or attic. On most control boards there will be a jumper that is marked to show that it controls the speed. These three are connected to the "Cool", "Heat", and "Fan" terminals on the control board. 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. A MERV 16 filters particles at a level near that or a HEPA. I want to do what is best. 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. If you want to solve the air noise problem, move the return air filters out of their hallway locations back to the upstream side of the return air duct at the furnace. You have to switch the wires to the blower motor. The noise of forced air is annoying. If you have suggestions or comments they are welcome. Step 3: Find the furnace draft inducer. 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 "Continuous Fan" refers to when the G terminal is powered for the fan only to run. 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. It can happen for lots of reasons, from improper furnace sizing and dirty filters to air duct insulation failures to the room being farthest from the furnace. Trane is a top rated US company of HVAC systems that offer quality and reliability. (Without enclosing my house in a climate-controlled bubble). Connect with our Customer Care team about your products, warranties, and dealer concerns. 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. I'd go with logging temperature differential (inside temp - outside temp) vs. energy consumption every day for a month with the blower on high and then for a month with the blower on low. Being an bms/controls guy I rarely have enough cfm in large buildings. 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. Again, this can usually be found in the upper-left corner. 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. Changing your HVAC and furnace air filter is a vital part of home maintenance. However, I like the continually run the fan to even out air temperature in the house. 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. 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 manual document include instructions and informations on how to troubleshoot the system. Change the speed. Identify those arcade games from a 1983 Brazilian music video. Note also that there is always just "one blower" but that blower may or may not be variable speed, etc. It allows three constant fan speeds as well as an automatic fan speed and a variable burn rate and compressor and fan speed. 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. Heating, Cooling, Air Conditioning, Ventilation and T-Stat Controls, 3-Speed, 4-Wire Ceiling Fan Switch Wiring. Run a jumper from "R" to "Y2" and the blower will run continuously at the second-stage cooling speed. Copyright Design Engineer/Project Manager for injection molded plastic company Tied from R to BK in air handler. But you will have a tough time measuring either on your basement Trane. 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. problems contact webmaster@doityourself.com. 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. Soak the filter in warm water in a bathtub or sink. Related: a two stage furnace works by actually shooting less gas out, which might improve its efficiency. A continuous green light means the IFC circuit board needs replacing. Switched it to heat (in which case the furnace board is in control of the fan, not the stat) - got fire, no fan. Usually, gas furnaces have a temp rise of 50F. 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. When one of the taps is powered with 24v, the motor will turn on and run at the selected speed. Narrowing that hysteresis loop will: Leading to a smaller Hysteresis loop, increasing motor efficiency by reducing iron eddy current losses. When he's not enjoying family time with his wife and three boys, he loves tinkering with projects and geeking out on electronics. Euler: A baby on his lap, a cat on his back thats how he wrote his immortal works (origin?). -The "Blower-on and Blower-off delay" time period can be selected. Can a furnace with a variable speed blower be used in a multistory house? Most residential furnaces were installed by the low bidder. 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. If the ohm meter comes back with an open line reading, the switch is bad and needs replaced. This will allow you to access the control board. The manometer tells you the CFM number. I have a Carrier furnace/heat pump with an expensive control thermostat that talks directly to the heat pump. Variable speed furnaces only operate at . Wires from the 16 pin plug are connected to this board. The boiler is feeding a DHW sidearm and furnace plenum HX. 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. This BTU/HR capacity should be used to set the CFM for the indoor blower motor. Why are Suriname, Belize, and Guinea-Bissau classified as "Small Island Developing States"? ago. Trane XR80 Troubleshooting After examining the flashing system you should check the green light speed. The S8X1 blower has 9 speeds. The wire's color will determine the speed settings that the motor will run at. Once you have located the panel, remove it. enjoys making jams and jellies during fruit season along with cooking meals. On this control board, there are multiple adjustments for the airflow speeds. 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. The higher the MERV rating, the better the filter is at capturing specific pollutants from the air. If power is getting to the blower motor, but the motor does not run, the motor may be burned out. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Blower on delay settings, which evidently have an impact on the duration and speed of the blower fan. There is no mechanism to change this. Roughly 400 CFM is needed for every 1 ton (12,000 BTU/HR) of Heat Removal Capacity in Air Conditioning Systems. This is a follow-up to our other article on "Adjusting the Furnace/AC Airflow Speed on a 120v PSC Blower Motor". 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. To understand how this works, lets look at the wiring on your furnaces blower. The heat exchanger warms up the incoming air and a blower or air handler sends the warm air throughout the home. Switch the Jumper On most control boards there will be a jumper that is marked to show that it controls the speed. The best answers are voted up and rise to the top, Not the answer you're looking for? This is NOT a user servicable item. home improvement and repair website. You can change the settings for cfm fan speed, but you have to do it manually at the board. It would have no affect on the Heat settings. Iappreciate all the comments, questions, and responses that Ireceive from each of you. 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. 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. The arrow should point toward the unit. Luci is a contributing writer for DoItYourself.com. He is also an HVACR Contracting Business owner of 16 years and holds an NJ HVACR Master License. Since I first posted this thread, my installer called Trane to get an answer to my original question. http://www.inspectorsjournal.com/Forum/topic.asp?TOPIC_ID=8998&, We've added a "Necessary cookies only" option to the cookie consent popup. If the control board is at fault, replace it. Turn off power at the main electric panel. The control board has relays that regulate the voltage to each component in the furnace. Check out www.acservicetech.com/store. Remove the motor and mounting bracket. 3.5 x 400 = 1400 CFM. It is about 1300-1400 sq feet, but then the basement was finished at some point, more or less doubling the square footage. 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 following list refers to each adjustment starting from the bottom and moving upward. 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. Are there downsides to this. He owned and operated a manufacturing business building Compact Utility Vehicles for homeowner use. To begin, turn off the power to your furnace. 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). The SW2 indicates the air conditioning size. Then switch the jumper to your desired speed. So How Do We Adjust Fan Speed? The variable speed furnace delivers the proper amount of airflow based on the heating and cooling needs of your home. Should I upgrade to a pcm br compatible thermostat? Can you increase the speed of an ECM AC blower? AC Service Tech HVAC Training is made possible by continued support from our visitors, customers, and support from these Sponsors! Your OP was a noise complaint. I know that it has been done. 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. Invention prototypes are another of his many accomplishments. You can verify the actual CFM by measuring the TESP of the system and comparing it to the manufacturer's airflow data sheet. Is it Covered Under Homeowners Insurance or a Home Warranty? ASE Certified Master Auto Technician I installed a Thermo Control 2000 boiler and first fired it up this Friday. 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. -The "AC/HP CFM Adjust" is the airflow volume to be set for system, efficiency, comfort.
how to change fan speed on a trane furnace