I know I need to replace a dying blower motor in a 1992 Trane XL80 gas furnace. These blower motor versions can be found in furnaces, air handlers, and packaged units. Invention prototypes are another of his many accomplishments. 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? There are also red and brown furnace speed wires. 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. 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 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. A second filter location for most HVAC systems and furnaces is the air handler portion of the system. Match the positions to the desired pictures within the manufacturer's installation literature. Another common place with a schematic is on the back of the blower fan door. For business related inquires email us at. Asking for help, clarification, or responding to other answers. 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. Now, I haven't done the measurement to learn how much electricity my blower uses on low vs high. 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. The Trane XR80's heavy steel insulated cabinet has two benefits: Holds in more of the heat that you pay for Decreases operating noise Because of its heavy steel insulated cabinet, the XR80 can experience as little as 1% of air leakage. When you open the panel, it kills the power to the furnace. Narrowing that hysteresis loop will: Leading to a smaller Hysteresis loop, increasing motor efficiency by reducing iron eddy current losses. The house cools off quick - too quick - and feels humid (not sure of the rh%). If the furnace manufacturer supplies different burners for that unit you may be risking premature failure. 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. Id check that out first. You need to find the wires that determine blower speed inside your furnace. Please note that mounting bracket consists of top and bottom brackets joined by 6 metal screws (fig.6.9). If power is getting to the blower motor, but the motor does not run, the motor may be burned out. To understand how this works, lets look at the wiring on your furnaces blower. Then, carefully switch it to the setting of your choice and push it back into the control board. When the system calls for heat and the inducer fan begins to run, check each pressure switch terminal. 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. 1995-2023 MH Sub I, LLC dba Internet Brands. 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. Here's hoping for some good answers. We also have quick reference cards for use out in the field! 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. Air Conditioner + Furnace Matched Systems, Air Conditioner + Air Handler Matched Systems, Does Your Air Conditioner Smell? with a wiring harness for the fan. Secure the old speed wire by twisting a wire nut over the end. A description of how to change motor speeds with a multiple speed fan motor on an IFC controlled furnace.This video is part of the heating and cooling series of training videos made to accompany my websites: www.graycoolingman.com and www.grayfurnaceman.com to pass on what I have learned in many years of service and repair. Is it Covered Under Homeowners Insurance or a Home Warranty? We have a Trane XL80 furnace manual in pdf version that you can download for free. Published: 05/19/2021 Author: Craig Migliaccio, About the Author: Craig is the owner of AC Service Tech LLC and the Author of the book Refrigerant Charging and Service Procedures for Air Conditioning. For business related inquires email us at info@acservicetech.com. XB Trane Furnace: Is there a fan speed control on the unit. the module must be a trane furnace model specific programmed and is available separate from the motor. Can airtags be tracked from an iMac desktop, with no iPhone? There are often five wire colors coming from your blower to your IFC. Western VA. Nov 28, 2009. 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. Privacy Policy. 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. I've gone through the process of adjusting the manual zone louvres on the main ducts (and on registers) and checked them with my camera for blockages. If your home has multiple HVAC systems, there will likely be at least one air filter for each unit. I have a Carrier furnace/heat pump with an expensive control thermostat that talks directly to the heat pump. You may freely link Dealers can answer questions, help you find the right products for your home, and repair your system. Trane. The noise is there in heat or AC. 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. In the manual, it lists some settings, e.g. Changing your HVAC and furnace air filter is a vital part of home maintenance. Certified Welder 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. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. The installation guide clearly describes how to set airflow for heating mode and cooling mode. So the blower motor is dead. Turn off power at the main electric panel. Check out our free Quizzes to test your knowledge here! It was working a week ago but just recently when it runs it blows out cold air. 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. Does lowering the blower speed of a forced-air furnace lower its efficiency? Slowing the blower speed reduced the noise but I take it you would still like it to be more silent. rev2023.3.3.43278. Air Filters remove dust, lint, pet dander, and other pollutants so you can breathe easier knowing your indoor air quality is better with Trane. Sign up for our email newsletter to learn helpful HVAC tips and tricks before your purchase your system. enjoys making jams and jellies during fruit season along with cooking meals. There is another way to wire this, but I can not find it back.. Compatible with Trane systems or any standard HVAC system. 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. Most require that you open a box (2 screws?) ECM Multi-Speed Blower Motor (Genteq X-13). (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! If the blower motor hums, check the blower fan to ensure that it spins freely. Change the speed. See our Privacy Policy for more information. Switch the power back on and test it. The MERV rating is typically printed on the filter packaging, but not necessarily on the filter itself. What sort of strategies would a medieval military use against a fantasy giant? Remove both of these wires and wire nut them together. On most control boards there will be a jumper that is marked to show that it controls the speed. We have been heating the crawl space in our house for several winters because the ductwork was all torn up from rats. A slim, removable cover will reveal the filter location. Since hot air is much lighter . 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. The control board is communicating with the blower module in order to determine the airflow volume needed. Remove the air handler. Additionally, they can be identified by the presence of a removable module/bell on the end of the motor. To clean a reusable filter, remove the filter from the air cleaning device. HVAC filters help remove dust, dander, and harmful particles from the air inside your home. Click On under Emergency Heat. 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. That is incorrect. Usually there will be three speeds ranging from 40 to 100% of airflow. I can unsubscribe and opt-out from future communications at any time. There is no mechanism to change this. R and BK are tied together. The system might not work properly. @Dave: Those were my thoughts as well. 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. Know your limits. 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. You will need to find the main cover panel on your fan. Can a furnace with a variable speed blower be used in a multistory house? *NOTE* If you attempt this, be absolutely sure that you have no power going to your system, especially before changing wires. On this motor module, the speed wires are red, orange, blue, yellow, and black. I understand the reason for slowing the air to remove humidity. Being an bms/controls guy I rarely have enough cfm in large buildings. If there isnt one in your home, turn it off at the breaker box. Batch split images vertically in half, sequentially numbering the output files, Using indicator constraint with two variables. Top 10 Spots! This is done so that the maximum amount of heat is gained in the building from the refrigerant. 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. Example: 1200 CFM is needed for a 3 ton 36,000 BTU/HR system. ago. The problem is, the furnace control module doesn't use a separate speed when the unit is running in continuous FAN mode. I guess you are talking about a 3 speed direct drive motor with 1/2 shaft. Recently I did a blower speed adjustment on the 2nd floor air. suggestions. Running your furnace fan all the time isn't exactly a bad thing. The boiler is feeding a DHW sidearm and furnace plenum HX. . Cut the wire's terminal connector off with wire cutters. Thanks for the reply. Disconnect between goals and daily tasksIs it me, or the industry? and as I recall, you have the HW VP IAQ stat. I'm getting a new s9v2. The airflow adjustments on this board are pictured below. In other units, it may be 2, 3, and 4 that are programmed. Motor is an ECM and it makes a low pitched whine sound when in CIRC or when the blower is ramping up or slowing down to stop. No: you will not save on gas/oil costs by running your blower on low. It only takes a minute to sign up. -The "AC/HP CFM Adjust" is the airflow volume to be set for system, efficiency, comfort. Thanks for all your continued support! PSC - The Permanent Split Capacitor Motor is still the most commonly used. Bundle Packs are a great way to save and get faster shipping! Switched it to heat (in which case the furnace board is in control of the fan, not the stat) - got fire, no fan. 3 of the wires will likely terminate with just a twist on cap. This helps the XR80 conserve more of the heat it produces. Locate the speed wires. The gas kicks on and is lit by the ignitor. 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. The factory may only set two or three of these colors as actual speeds. 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. http://www.inspectorsjournal.com/Forum/topic.asp?TOPIC_ID=8998&, We've added a "Necessary cookies only" option to the cookie consent popup. The air handler houses the fan and fan motor and is usually located in the basement or attic. The arrow should face the direction the air is flowing. Your OP was a noise complaint. You can change the settings for cfm fan speed, but you have to do it manually at the board. This BTU/HR capacity should be used to set the CFM for the indoor blower motor. H.R. The induction motor begins running. 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. If the control board is at fault, replace it. The remaining colored wires will be default speeds. I have posted an inquiry under the Air Conditioning forum. The system also accounts for blocked vents and dirty furnace filters, and adjusts fan speed as needed to compensate. The S8X1 blower has 9 speeds. To begin, turn off the power to your furnace. The continuous fan is marked SW3. . My main questions are. Ilook forward to responding to many more! Inventor with two patents (weight training – anti-rollback for manual wheelchair) The wires that are used will determine the speed settings that the motor will run at.
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