The air handler houses the fan and fan motor and is usually located in the basement or attic. New XV80 Trane furnace makes noise when blower runs at low speed. Heres What It Means, Why You Should Monitor the Humidity Levels In Your Home. American Standard air handler troubleshooting The heat exchanger warms up the incoming air and a blower or air handler sends the warm air throughout the home. charts are usually found on the air handler inside door to controls. Second-stage auxiliary heating for heat pumps and multi-stage furnaces. These adjustments can be made by pulling the single wire connector and moving it to another single tab positioned horizontally in each row. There is another way to wire this, but I can not find it back.. Choose the Trane owner guide thats specific to your unit for detailed instructions on locating and changing yourairfilter. The blower motor also begins running, but at low rpm. 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. Air Filters remove dust, lint, pet dander, and other pollutants so you can breathe easier knowing your indoor air quality is better with Trane. Heating, Cooling, Air Conditioning, Ventilation and T-Stat Controls, 3-Speed, 4-Wire Ceiling Fan Switch Wiring. No need for direct trane replacment motor. When changing the AC or furnace filter, the arrow should face the furnace and point away from the return duct. Locate the speed wires. Top Ten Interview Tips to Land that HVAC/R Job! The remaining colored wires will be default speeds. He has been DIY since childhood and is now a septuagenarian. video below! Usually there will be three speeds ranging from 40 to 100% of airflow. 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? (Although it wouldn't hurt to record those too.) The company offers a variety of furnaces to suits the needs of every home. Anyone? 3 of the wires will likely terminate with just a twist on cap. I'm getting a new s9v2. and our 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. 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. 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 think that when it is in enhanced mode the fan only runs at 50%, you can try changing your dip switches to see. 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. I have also measured that on low speed my furnace requires AT-LEAST 1 hour of constant running to raise my home temp by 6 deg F. On high speed it takes 30-40 min. Secure the old speed wire by twisting a wire nut over the end. -The BTU/HR size is selectable between 48,000 42,000 36,000 or 30,000 BTU/HR. Yes--the efficiency of the heat exchanger will decrease. Roughly 400 CFM is needed for every 1 ton (12,000 BTU/HR) of Heat Removal Capacity in Air Conditioning Systems. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Sometimes less cmf will give the air more time in the heat exchanger thus letting it get hotter. To switch the jumper, you will need to hold onto it gently as you pull it out of its current setting. HVAC Fan Speed Too High - What To Do? - HVACseer.com I miscalculated. Heat exchange takes time. Based on some randomly googled comments here: http://www.inspectorsjournal.com/Forum/topic.asp?TOPIC_ID=8998& seems to agree it decreases efficiency but may increase comfort [ex: cold spots or noise level] :). You will need to find the main cover panel on your fan. If you have not read that yet, I would encourage you to do so! 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 heat exchanger can be overheated and burned out if the blower does not remove enough heat. 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. Thus, my blower can't be using that much electricity on high. Variable speed blower control - HVAC-Talk: Heating, Air & Refrigeration Being an bms/controls guy I rarely have enough cfm in large buildings. Wires from the 16 pin plug are connected to this board. Your R value shouldn't change, and daily average wind speed and precipitation should have a minimal effect on the convection coefficient. By clicking '. How to change the fan motor speed on a gas furnace - YouTube The most important factor is temperature differential - the difference between the inside temperature and outside temperature. You can verify the actual CFM by measuring the TESP of the system and comparing it to the manufacturer's airflow data sheet. Trane XV80 Blower speed settings - HVAC-Talk: Heating, Air Each is associated with a different blower speed. This lower blower speed enhances 10 Reasons a Blower Fan Won't Start in a Furnace, AC or Heat Pump. Options are, for example, 4 minutes at 80%, or 30 seconds at 50%. 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 to Change Air Handler Fan Speed | Hunker This covers speed adjustment on a PSC motor. Possibly you could do the same here (turn down blower and gas). Adjust the fan speed, and if you're still experiencing problems, contact your local American Standard Customer Care dealer. For this reason, pair your Variable Speed AC unit with one of the following components: Hyperion TAM9 Air Handler, XC 80 Gas Furnace, XC 95M Furnace, or S9V2. For business related inquires email us at. These three are connected to the "Cool", "Heat", and "Fan" terminals on the control board. Upon initial installation, these dip switches need to be adjusted for the particular unit, size, and application. If a clear distinction between the blower speeds isn't obvious in the data, then you're probably not going to save much money either way, so go with what's most comfortable for you. I recently had have a trane xl 90 want to adjust speed of blower fan blower motor has 4 wires white going to neutral black unhooked blue to high speed yellow to I have a Trane Indoor Air Handler Model No. There is no mechanism to change this. Not every AC or furnace filter will have an arrow printed on the frame, but when it does the arrow indicates the direction the filter must face. But you will have a tough time measuring either on your basement Trane. We have been heating the crawl space in our house for several winters because the ductwork was all torn up from rats. 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. Step 3. Connect the common wire to the neutral terminal of the furnace's control board. Tied from R to BK in air handler. When you purchase through links on our site, we may earn commissions at no cost to you. What is the result of a higher blower speed? - Houzz This value is then multiplied by 150 cfm to obtain the required airflow for the furnace in heating operation. My first thought was that the unit was oversized, but I figured out how to check the DIP switch settings. The problem is, the furnace control module doesn't use a separate speed when the unit is running in continuous FAN mode. Recently I did a blower speed adjustment on the 2nd floor air handler and thought to show how it can be done. HVAC filters help remove dust, dander, and harmful particles from the air inside your home. Note also that there is always just "one blower" but that blower may or may not be variable speed, etc. All rights reserved. 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. 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. Trane Furnace blower runs all the time - Repair Clinic 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. There are only a few steps required for most units and having the control will allow you to get your unit to give you the service you need. The following list refers to each adjustment starting from the bottom and moving upward. 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. Thanks for contributing an answer to Home Improvement Stack Exchange! 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. Bus Driver/Substitute Teacher When the system calls for heat and the inducer fan begins to run, check each pressure switch terminal. These blower motor versions can be found in furnaces, air handlers, and packaged units. Use tab to navigate through the menu items. You will also see the red E icon under Emergency . Questions of a Do It Yourself nature should be On the furnace / air handler board you should have two wires on the "Y2" connection, assuming a two-stage cooling 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. Remove the motor and mounting bracket. 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. On the motor, only one of the 5 numbered taps has 24v power at a time based on the speed desired at the control board. This trick only works on gas furnace systems with a multi-speed blower. Can I retrofit a 2-speed or variable speed blower on a Payne PG8UAA This is NOT a user servicable item. Its time to clear the air. It provides quieter and more even and comfortable heat than a conventional furnace and doesnt consume electricity unnecessarily. Divide the rated Btu input by 10,000. The fan speed is very low when not heating/cooling. (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. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. hvac - Why is my furnace blower running at low speed? - Home If you know what you are doing, it is very simple to adjust the speed of your furnace fan. He has several years experience as a professional cabinet builder, and he is an accomplished auto repairman, having operated an auto repair business for many years. 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. 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. Usually, gas furnaces have a temp rise of 50F. 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. bean. I have posted an inquiry under the Air Conditioning forum. Remove two screws from each bracket leg holding the motor. The wires that are used will determine the speed settings that the motor will run at. Luci is a contributing writer for DoItYourself.com. They do this by coupling a sophisticated, programmable thermostat to a variable-speed motor. This BTU/HR capacity should be used to set the CFM for the indoor blower motor. This control board is out of a variable speed furnace with a modulating gas valve that has a variable speed inducer motor. Identify the blower fan and the speed wires. You have to switch the wires to the blower motor. Standard blower motors operate at a single speed and cost around $450 to replace, including parts and labor, while variable-speed motors cost $600 and up. 80% would be great for me. I'm not in enhanced mode. How to adjust the fan speed and the new Trane furnaces model - YouTube Click On under Emergency Heat. http://www.inspectorsjournal.com/Forum/topic.asp?TOPIC_ID=8998&, We've added a "Necessary cookies only" option to the cookie consent popup. Trane variable speed air handler setting - Houzz What sort of strategies would a medieval military use against a fantasy giant? This will increase the number of air changes per hour (ACH) in the house and also help compensate for a more restrictive whole home air filter like a MERV 16 being installed. Example: 1200 CFM is needed for a 3 ton 36,000 BTU/HR system. It offers three settings: 525 RPM for saving energy, 900 RPM for heating, or 1100 RPM for air conditioning. Move the high-speed wire to low. 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. XB Trane Furnace: Is there a fan speed control on the unit. Cut the wire's terminal connector off with wire cutters. This X-13 model shown above designates the speeds taps as numbers, not as colors, to denote each speed. (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! Slowly flashing shows your furnace is on and does not need heat. The MERV scale rates filters from 1 to 16. Trane is a top rated US company of HVAC systems that offer quality and reliability. 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. I needed to go the opposite direction and increase fan speed. Its not advisable to slow your furnace blower speed. Trane s9v2 should thermostat control blower speed? Cookie Notice Fortunately, theres a simple fix if you look at your furnaces Integrated Furnace Control (IFC) board. 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. Inventor with two patents (weight training – anti-rollback for manual wheelchair) Now that its gotten cold, we've noticed that several of the heat register barely have any air coming out of them. 01 - Trane Furnace Control Board. 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. Bundle Packs are a great way to save and get faster shipping! Variable Speed units continuously communicate with each other and your Trane thermostat to provide optimal efficiency. Turn off the emergency HVAC shutoff switch Remove top and bottom cover panels on the air handler / furnace unit (fig.5.1). 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. Additionally, they can be identified by the presence of a removable module/bell on the end of the motor. Step 4: Take out the inducer motor. Continue reading to learn how to lower the fan speed. You may freely link to this site, and use it for non-commercial use subject to our terms of use. Also, if you are looking for a video to better help understand this topic, check out our "Adjusting HVAC Blower Speed CFM on Furnace & AC Units!" If there isnt one in your home, turn it off at the breaker box. The arrow should point toward the unit. Duct Dynasty: Taking the Guesswork Out of Fan Speed Settings For example, on a package unit, only taps 3, 4 and 5 may be programmed. I simply am unable to put my hands on the schematic. Does lowering the blower speed of a forced-air furnace lower its 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. All information is provided "AS IS." Once you have located the panel, remove it. The MERV rating is typically printed on the filter packaging, but not necessarily on the filter itself. (Without enclosing my house in a climate-controlled bubble). I.e., maybe more heat is now escaping through the exhaust. How to tell which packages are held back due to phased updates, Linear Algebra - Linear transformation question. The automatic feature rarely kicks in once at set point. ECM blower motors do not require an external capacitor to operate. H.R. Western VA. Nov 28, 2009. 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 motor module, the speed wires are red, orange, blue, yellow, and black. In order for the filter to work properly, the right size is crucial. During the awake hours I Hold the fan speed at either low or medium. To understand how this works, lets look at the wiring on your furnaces blower. By regularly changing your filter, you can improve your indoor air quality and extend the life of your heating and cooling system. Of course all that heat was lost because of the ridiculous number of vents in our foundation. Air Handler Blower Fan Speed - InspectAPedia Air Filter - Be sure to check the air filter and replace if necessary. Stage 2 Aux Heating. If the terminals are present at the motor module (ECM X-13) you can switch speeds at the blower motor location. Test the new speed. -The "Blower-on and Blower-off delay" time period can be selected. *NOTE* If you attempt this, be absolutely sure that you have no power going to your system, especially before changing wires. Invention prototypes are another of his many accomplishments. Does lowering the blower speed of a forced-air furnace lower its efficiency? If the Delta T continues to rise, this is due to low indoor airflow. Connect with our Customer Care team about your products, warranties, and dealer concerns. (FYI Filter was clean and furnace was recently serviced all prior to my initial investigation of the short cycling). It is important to know that you cant go by a normal color code to determine the speeds. The control board has relays that regulate the voltage to each component in the furnace. Where To Find R-22 & R410A Leaks on AC Units! The constant air turn over at a lower set point keeps the house comfortable. Reddit and its partners use cookies and similar technologies to provide you with a better experience. ago. Again, this can usually be found in the upper-left corner. The continuous fan is marked SW3. I'll just run the heat pump through the leaky ductwork and heat the crawl space. thanks in advance. Most require that you open a box (2 screws?) I am just clueless, could it be the thermostat (really old) or something that is going to cost a billion dollars to fix? He is experienced in wood and metal construction, having designed and built several houses and metal buildings. Copyright 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). Sign up for our email newsletter to learn helpful HVAC tips and tricks before your purchase your system. Recently I did a blower speed adjustment on the 2nd floor air. 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. However, during the time period while the compressor is not engaged I need to circulate more air on the second floor or it becomes stale. Before you begin this process it is a good idea to make sure that no power is going to the fan. There are often five wire colors coming from your blower to your IFC. I think the best bet would be to actually test it for a few months and see. In other units, it may be 2, 3, and 4 that are programmed. low would be 350 CFMs/ton, medium 400 CFMs/ton, high 450 CFMs/ton. Typical setups include these wire colors with associated blower speeds. If power is getting to the blower motor, but the motor does not run, the motor may be burned out. To clean a reusable filter, remove the filter from the air cleaning device. -The "System Type" is the CFM per ton to be adjusted between low, normal and high. This will increase the number. Run a jumper from "R" to "Y2" and the blower will run continuously at the second-stage cooling speed. In his particular case it was "too much volume" of air so I presume just moving air filters isn't enough (typically you'd need to adjust blower level AFAICT). 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. 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. So if you are actually moving 1250 CFM then you are at 357 CFM/ton, which is a good setup for dehumidifying. When changing the AC or furnace filter, the arrow should face the furnace and point away from the return duct. One of these wires will be coming from the thermostat and the other will go to the outside unit. How do I check if this furnace switch the blower to second speed. I have a Carrier furnace/heat pump with an expensive control thermostat that talks directly to the heat pump. If you have suggestions or comments they are welcome. Remove both of these wires and wire nut them together. The higher the MERV rating, the better the filter is at capturing specific pollutants from the air. The hot air will rise and heat the floor from beneath, a DIY form of radiant floor heating. Variable Speed Blower Motor (Genteq ECM 3.0, 4 pin connector). Any takers? We also have quick reference cards for use out in the field! 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. 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. My main questions are. home improvement and repair website. 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. Connect and share knowledge within a single location that is structured and easy to search. 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.
how to change fan speed on a trane furnace
