I think the best bet would be to actually test it for a few months and see. Click On under Emergency Heat. Choose the Trane owner guide thats specific to your unit for detailed instructions on locating and changing yourairfilter. But I'm reasonably sure it uses less to run on high vs low then it uses to run on low vs OFF. Helm is an accomplished DIY craftsman. I understand the reason for slowing the air to remove humidity. H.R. When you purchase through links on our site, we may earn commissions at no cost to you. In fact, there's no need to worry about the fan wearing out or breaking down because it's designed to run continuously, and there's an array of benefits connected to this. In order to determine or change the speed, check the wiring diagram of the furnace/air handler/package unit that the motor is installed in. 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. He is also an HVACR Contracting Business owner of 16 years and holds an NJ HVACR Master License. PSC - The Permanent Split Capacitor Motor is still the most commonly used. Connect with our Customer Care team about your products, warranties, and dealer concerns. Your OP was a noise complaint. On the furnace / air handler board you should have two wires on the "Y2" connection, assuming a two-stage cooling system. When changing the AC or furnace filter, the arrow should face the furnace and point away from the return duct. She has experience researching and creating a wide range of home improvement and garden projects, and especially enjoys learning about fireplaces and exterior design. How does a furnace work? Can I retrofit a 2-speed or variable speed blower on a Payne PG8UAA forced air furnace? My question was whether the efficiency of heat transfer thru the exchanger would be somewhat compromised due to the reduced airflow. This will show what speed each numbered tap is programmed as. and as I recall, you have the HW VP IAQ stat. Radiant floor heat web sites are mysteriously silent on this simple and cheap modification of pre-exisiting systems to accomplish the same goal. I'm not completely convinced on this, since the claim is made by a company that sells variable speed blowers for retrofitting HVAC systems. ECM Multi-Speed Blower Motor (Genteq X-13). Here are some of them: Better circulation of heated and cooled air. There are often five wire colors coming from your blower to your IFC. Euler: A baby on his lap, a cat on his back thats how he wrote his immortal works (origin?). Carefully disconnect the wires from the coolant terminal, which is located on the back of the unit. This BTU/HR capacity should be used to set the CFM for the indoor blower motor. We have a Trane XL80 furnace manual in pdf version that you can download for free. 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. Copyright 1995-document.write(new Date().getFullYear()) MH Sub I, LLC dba Internet Brands. One of these wires will be coming from the thermostat and the other will go to the outside unit. Proper returns are rarely a thought. you will get the better dehumidification with the lower setting. 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. The wires that are used will determine the speed settings that the motor will run at. The low pitched whine stops when fan is in high speed. The problem is, the furnace control module doesn't use a separate speed when the unit is running in continuous FAN mode. I have a Trane XV90 propane furnace with a variable speed blower. Realizing this after a very long period of investigation, I eventually turned up the fan speed dial; this seemed to correct the problem initially, until one night a week later lying in bed I heard it do the same thing but but after a much longer run time. Third-stage auxiliary heating for heat pumps and multi-stage furnaces. Which thermostat wires control the furnace fan? 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. Stage 3 Aux Heating. Comfort R should be off if you are using . All information is provided "AS IS." Remove the motor and mounting bracket. If the terminals are present at the motor module (ECM X-13) you can switch speeds at the blower motor location. If you have suggestions or comments they are welcome. in this thread in this sub-forum in the entire site. To clean a reusable filter, remove the filter from the air cleaning device. The wires are several different colors. To understand how this works, let's look at the wiring on your furnace's blower. According to the manufacturer's documentation, your furnace should have a 3 or 4 speed blower motor. (FYI Filter was clean and furnace was recently serviced all prior to my initial investigation of the short cycling). Trane XR80 Troubleshooting After examining the flashing system you should check the green light speed. Note also that there is always just "one blower" but that blower may or may not be variable speed, etc. Questions of a Do It Yourself nature should be The higher the MERV rating, the better the filter is at capturing specific pollutants from the air. Can this be adjusted Of course all that heat was lost because of the ridiculous number of vents in our foundation. Yes: you will save electricity costs by running your blower on low. When the system calls for heat and the inducer fan begins to run, check each pressure switch terminal. CFM stands for "cubic feet per minute." Switch the Jumper On most control boards there will be a jumper that is marked to show that it controls the speed. 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. Note: (High voltage is always going to your blower motor along with the common for the 24 volts. 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. 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. Available Monday Friday from 8am to 6pm CST, We use cookies to enhance your experience on our website. Tools that we use: www.amazon.com/shop/acservicetech. Air filters are typically found behind the return vent door, often located in the ceiling or wall in the central portion of your home. This can be done through an independent dehumidistat or through a thermostat's DEHUM terminal (if available). Is it Covered Under Homeowners Insurance or a Home Warranty? I installed a Thermo Control 2000 boiler and first fired it up this Friday. If you have an HVACR relatedquestion, drop it in the comment section of one of theYouTube videos at theAC Service Tech YouTube Channel and I will do my best to respond. If you need assistance determining the best filter for your unit, a Trane employee would be happy to assist you. On this control board, there are multiple adjustments for the airflow speeds. Second-stage auxiliary heating for heat pumps and multi-stage furnaces. 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. Continue reading to learn how to lower the fan speed. I'm not in enhanced mode. A slim, removable cover will reveal the filter location. Here's hoping for some good answers. You will need to find the main cover panel on your fan. View our Privacy Policy here. The MERV rating is typically printed on the filter packaging, but not necessarily on the filter itself. Air Filters remove dust, lint, pet dander, and other pollutants so you can breathe easier knowing your indoor air quality is better with Trane. These blower motor versions can be found in furnaces, air handlers, and packaged units. 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). Yes you can change it, how to do it is in the manual, yes there can be downsides, no it probably won't fix your air balancing issues. ECM Multi-Speed Blower Motor (Broad Ocean Type), For an ECM blower motor with wires exiting the module (shown above), the speed is changed at the control board by moving the colored wire terminals. Once you cut the power, you can remove the cover of your furnace to get access to the control board. Well, it does make sense that lowering the blower speed would reduce its electrical consumption. Craig creates educational HVACR articles and videos which are posted at https://www.acservicetech.com & https://www.youtube.com/acservicetechchannel & https://www.facebook.com/acservicetech/. Thus, my blower can't be using that much electricity on high. 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. I want to do what is best. 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. Click System Options. There are often five wire colors coming from your blower to your IFC. Does lowering the blower speed of a forced-air furnace lower its efficiency? In this case, to adjust the blower speeds, move the dip switches (in the red section of the control board) to the positions shown in the manufacturer's installation instructions. 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. The constant torque/multispeed motor will have the smallest module. Invention prototypes are another of his many accomplishments. Mine. Most require that you open a box (2 screws?) What sort of strategies would a medieval military use against a fantasy giant? No problem with the boiler. No: you will not save on gas/oil costs by running your blower on low. Compatible with Trane systems or any standard HVAC system. 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. On this motor module, the speed wires are red, orange, blue, yellow, and black. 80% would be great for me. Heating, Cooling, Air Conditioning, Ventilation and T-Stat Controls, 3-Speed, 4-Wire Ceiling Fan Switch Wiring. The product data guide, and label on the inside panel indicate the air . @Dave: Those were my thoughts as well. So I continued to play around with different combinations tonight. Top 10 Spots! The house cools off quick - too quick - and feels humid (not sure of the rh%). It is about 1300-1400 sq feet, but then the basement was finished at some point, more or less doubling the square footage. I'll edit my answer and include the exact parameters I'd record every day for a thorough study. 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). Why are Suriname, Belize, and Guinea-Bissau classified as "Small Island Developing States"? Slowing the blower speed reduced the noise but I take it you would still like it to be more silent. Remove two screws from each bracket leg holding the motor. enjoys making jams and jellies during fruit season along with cooking meals. Why is my furnace blower running at low speed? 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 Only 3 of the 5 colored wires may be used at a time. Top Ten Interview Tips to Land that HVAC/R Job! So the blower motor is dead. That is incorrect. Most of these are on the bottom left of the control board. Shay Tilander is a senior editor at Family Handyman. 3.5 x 400 = 1400 CFM. 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. 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. Each is associated with a different blower speed. The blower energy draw at a lower speed will be offset by the loss in fan wheel inertia. 1995-2023 MH Sub I, LLC dba Internet Brands. When it is flashing fast there is heat throughout your home. If you do, you may not have enough air flow over the heat exchanger, resulting in overheating and eventually a shorter exchanger life span. Questions of a Do It Yourself nature should be submitted to our "DoItYourself.com Community Forums". Therefore I again adjusted the speed upward a bit and that seemingly has corrected the problem. Run a jumper from "R" to "Y2" and the blower will run continuously at the second-stage cooling speed. Website operating However, they are limited based on the total external static pressure (TESP) in the duct. My first thought was that the unit was oversized, but I figured out how to check the DIP switch settings. You should now see a red E icon in the System Mode screen next to Auto and Heating modes. The question is would the trade-off be in favor of less blower energy consumption and more loss through exhaust, or more blower energy consumption and less loss through exhaust. On the furnace / air handler board you should have two wires on the "Y2" connection, assuming a two-stage cooling system. Connect the black wire to the manometer. This will help prevent injury and damage to the furnace fan. Here are how my dip switches are set: Did the installer tie in a humidistat there on that V/S blower . This lower blower speed enhances These are not switched off but are live all the time. ECM blower motors do not require an external capacitor to operate. If the control board is at fault, replace it. 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. For example, on a package unit, only taps 3, 4 and 5 may be programmed. Select Climate from the blue menu on the left side of the page. 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. We have been heating the crawl space in our house for several winters because the ductwork was all torn up from rats. 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 have a Carrier furnace/heat pump with an expensive control thermostat that talks directly to the heat pump. This will allow you to access the control board. All information is provided "AS IS." Craig is a licensed Teacher of HVACR, Sheet Metal, and Building Maintenance in the State of New Jersey of the USA. (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! 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. We are no longer supporting IE (Internet Explorer). But I guess my question is, can the air flow problem really be a simple as upping the blower speed? Another key difference is that the circulate . In support of this: I found the mfr owner's manual for my furnace and in it, it states, "if you have an air-conditioning coil installed, you should switch the furnace blower speed to high to accommodate the decreased air-flow caused by the cooling coil in the plenum.". Sign up for our email newsletter to learn helpful HVAC tips and tricks before your purchase your system. The constant air turn over at a lower set point keeps the house comfortable. For business related inquires email us at info@acservicetech.com. If you are a homeowner looking to repair your own appliance, understand that the voltages can be lethal, the fuels are highly flammable and high pressures are used. However, I like the continually run the fan to even out air temperature in the house. -The BTU/HR size is selectable between 48,000 42,000 36,000 or 30,000 BTU/HR. 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. Its time to clear the air. Locate your thermostat on the page and click System Mode. Here's what to record, in order of importance: The last two (5 and 6) aren't as important, but more data is always better. 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. and our The SW2 indicates the air conditioning size. Trane. To understand how this works, lets look at the wiring on your furnaces blower. This covers speed adjustment on a PSC motor. One fan is inside the house, and one is outside the home. 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). XB Trane Furnace: Is there a fan speed control on the unit. I just moved into a house with a Trane XR80 furnace (several years old). with a wiring harness for the fan. Adjust the fan speed, and if you're still experiencing problems, contact your local American Standard Customer Care dealer. The remaining colored wires are the speed selectors for this blower motor.). There is another way to wire this, but I can not find it back.. Various advertisements for variable speed high efficiency furnaces call them "more energy efficiency" (note also the difference between a variable speed blower and a high efficiency furnace, they're separate, for instance you can have a variable speed blower on a low efficiency furnace). 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. If the pressure switch is functioning properly . You have to switch the wires to the blower motor. There is no humidistat. I'm also going to go through and make sure there are no visible leaks or damage to them. A MERV rating speaks to the filters ability to capture large particles. I'm getting a new s9v2. Remove battery from the thermostat (or disconnect thermostat altogether). 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. Typical setups include these wire colors with associated blower speeds. Sometimes less cmf will give the air more time in the heat exchanger thus letting it get hotter. To recap: The service technician might be able to increase (or decrease) the blower speed, but that would probably lower the AC's cooling efficiency. 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. AC Service Tech HVAC Training is made possible by continued support from our visitors, customers, and support from these Sponsors! The ohm meter should read very close to zero. Its not advisable to slow your furnace blower speed. In terms of heat pumps, running the external blower faster may reduce i2r copper losses and hysteresis iron eddy current losses. Now, I haven't done the measurement to learn how much electricity my blower uses on low vs high. He is committed to outdoor cooking in a Bar-B-Q pit he welded together several years ago. All rights reserved. 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. How do I check if this furnace switch the blower to second speed. I can unsubscribe and opt-out from future communications at any time. homininet 8 mo. This is a follow-up to our other article on "Adjusting the Furnace/AC Airflow Speed on a 120v PSC Blower Motor". I connected a second thermostat to the circuit board to run the blower (R to G). Sometimes you have to add more ducts to achieve the proper pressure and velocity. 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. (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. Your AC or furnace is designed for a specific type of filter. 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. The heat exchanger warms up the incoming air and a blower or air handler sends the warm air throughout the home. The control board has relays that regulate the voltage to each component in the furnace. Variable Speed Blower Motor (Genteq ECM 3.0, 4 pin connector). Use tab to navigate through the menu items. If the furnace manufacturer supplies different burners for that unit you may be risking premature failure. Variable Speed Blower Motor ( Genteq 2.3, 16 pin connector). I miscalculated. rev2023.3.3.43278. By accepting all cookies, you agree to our use of cookies to deliver and maintain our services and site, improve the quality of Reddit, personalize Reddit content and advertising, and measure the effectiveness of advertising. 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.
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