There are two types of fan motors found in furnaces: 1.) There are several tutorials on Youtube about how to do this step for specific inducer motor brands. No need for direct trane replacment motor. Put the air handler back. How to Replace a Trane Blower Motor - Part 2 - AllThumbsDIY.com 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. The furnace operates for two minutes or so before it shuts down. New XV80 Trane furnace makes noise when blower runs at low - JustAnswer 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. (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! - Answered by a verified HVAC Technician . Example: 1200 CFM is needed for a 3 ton 36,000 BTU/HR system. I'm also a little concerned that this furnace might be a little undersized for our house (if I understand correctly, its a 100 BTU 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. I'll edit my answer and include the exact parameters I'd record every day for a thorough study. How to Fix a Pressure Switch Error on a Trane | Hunker All rights reserved. Again, this can usually be found in the upper-left corner. We have a Trane XL80 furnace manual in pdf version that you can download for free. I hope this helps you understand how to adjust the airflow speed on ECM Blower Motors! This control board is out of a variable speed furnace with a modulating gas valve that has a variable speed inducer motor. Can you increase the speed of an ECM AC blower? HVAC filters help remove dust, dander, and harmful particles from the air inside your home. When it is flashing fast there is heat throughout your home. A 90 percent-plus furnace needs 150 cfm per 10,000 Btu of input. The blower motor also begins running, but at low rpm. Choose the Trane owner guide thats specific to your unit for detailed instructions on locating and changing yourairfilter. low would be 350 CFMs/ton, medium 400 CFMs/ton, high 450 CFMs/ton. Air filters are measured by Minimum Efficiency Reporting Values (MERV). 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. New XV80 Trane furnace makes noise when blower runs at low speed. Your AC or furnace is designed for a specific type of filter. I have a Trane XV90 propane furnace with a variable speed blower. The NET difference of the above two figures is your savings or cost. 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. My gas furnace has two options for the blower speed: MED, and MED-HI. Follow us on Facebook for Quick Tips and Updates here! 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. Changing the Blower Speed on a Furnace - YouTube Helm is an accomplished DIY craftsman. At night with an even lower set point I switch the fan speed to automatic. Options are, for example, 4 minutes at 80%, or 30 seconds at 50%. Most furnaces have a relay switch on the door cover. But I'm reasonably sure it uses less to run on high vs low then it uses to run on low vs OFF. 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. 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? HVAC system for small church has twin Trane XR90 units installed in 2009 to replace a unit with a much larger single blower. 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. I needed to go the opposite direction and increase fan speed. Another key difference is that the circulate . Proper returns are rarely a thought. These three are connected to the "Cool", "Heat", and "Fan" terminals on the control board. Then switch the jumper to your desired speed. Cross country truck driver -- over dimensional freight with a wiring harness for the fan. Turn off the emergency HVAC shutoff switch Remove top and bottom cover panels on the air handler / furnace unit (fig.5.1). You have to switch the wires to the blower motor. The following list refers to each adjustment starting from the bottom and moving upward. He farmed commercial garden produce for several years. If the terminals are present at the motor module (ECM X-13) you can switch speeds at the blower motor location. 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. 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. 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. Typical setups include these wire colors with associated blower speeds. There are also red and brown furnace speed wires. Turn off the power source that is connected to the furnace blower. Learn more about Stack Overflow the company, and our products. ECM Multi-Speed Blower Motor (Genteq X-13). Be sure to check out our previous article on "Adjusting the Furnace/AC Airflow Speed on a 120v PSC Blower Motor" if you haven't read it yet! When the system calls for heat and the inducer fan begins to run, check each pressure switch terminal. Control Humidity by Optimizing Fan Speed | Priority Energy 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. 10 Reasons a Blower Fan Won't Start in a Furnace, AC or Heat Pump. 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. A properly fitted filter can also trap unwanted, and oftentimes unseen, pollutants from the air in your home, including: Start with the return vent. If the Delta T continues to rise, this is due to low indoor airflow. Iappreciate all the comments, questions, and responses that Ireceive from each of you. Most of these are on the bottom left of the control board. That will give you the most reliable results for your particular system. Other than removing the module and seeing burnt components it must be diagnosed by a professional with a techmate tool ( allows you to test the motor and module and determine cause of error). 3.5 x 400 = 1400 CFM. 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). hvac - Why is my furnace blower running at low speed? - Home For 240v units, both the L and N are hots. Is It Okay to Run Your Furnace Fan Continuously? A slim, removable cover will reveal the filter location. DoItYourself.com, founded in 1995, is the leading independent home improvement and repair website. The wires are several different colors. To switch the jumper, you will need to hold onto it gently as you pull it out of its current setting. To ensure our content is always up-to-date with current information, best practices, and professional advice, articles are routinely reviewed by industry experts with years of hands-on experience. How To Adjust Blower Speed on a Furnace | Enerny Diagnostics This is NOT a user servicable item. View our Privacy Policy here. 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. 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. How to change blower speed on furnace - Trane XB 2018 Ryan W 794 subscribers Subscribe 185 44K views 4 years ago A quick description on how to change the blower speed on your furnace. I'm in the process of re-wiring my blower to run on high with the furnace. CFM stands for "cubic feet per minute." 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. DoItYourself.com, founded in 1995, is the leading independent My question was whether the efficiency of heat transfer thru the exchanger would be somewhat compromised due to the reduced airflow. Air Filter - Be sure to check the air filter and replace if necessary. He is committed to outdoor cooking in a Bar-B-Q pit he welded together several years ago. Certified Welder 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. My first thought was that the unit was oversized, but I figured out how to check the DIP switch settings. Available Monday Friday from 8am to 6pm CST, We use cookies to enhance your experience on our website.