How to read trane model number

Nov 6, 2017 · The wrong replacement component may not only cause the compressor to not run, but it also could cause damage to the compressor. When selecting a replacement component, you will need to have the make and model number of the compressor or accessory. If you opt to get an original equipment manufacturer (OEM) component, simply giving make and model ...

You can also view TUX1B080A9421AA parts diagrams and manuals, watch related videos or review common problems that may help answer your questions to get started on fixing your Furnace model. For additional assistance, please contact our customer service number at 1-800-269-2609, 24 hours a day, seven days a week or send us a message …You can determine the size in tons of your Trane HVAC system by examining the model number on the data sticker at the side of the a/c condenser (outdoor unit). …Step 1. Look at the first number on the outside unit's model number. The model number starts with a two or four. This number represents the type of refrigerant the system uses. Two stands for R-22 and four stands for …Aug 6, 2021 ... These Trane TAM9/ XV20 Variable Speed Systems are super sophisticated, but with all that tech reliability can sometimes be an issue. APPENDIX 7.2. DECODING OF MANUFACTURER MODEL NUMBERS. The Department used manufacturer model numbers, among other furnace characteristics, to determine nominal airflow capacity. Manufacturers often code furnace specifications into their model numbers. This appendix illuminates the furnace specifications from manufacturer model numbers. Serial Number 19 34 6 0205 J 19: year of 2019 34: 34th week of the calendar year 6: 6th day of that week (1 = Monday, 2 = Tuesday… 6 = Saturday) 0205: the 205th unit produced that dayThis video shows how to tell the age and size of your Trane equipment. It also shows you what type of refrigerant the unit uses if it is R-22 or R-410A. Usua... 14.7 – 1.0 = 13.7 kW Heating Capacity Step 1 Calculate the building heating load using the Trane calculation form or other standard accepted method. Step 2 Size the equipment using Table PD-5 to match the heating loads at design conditions.

Registration can be completed online or by calling 1-800-554-6413. If the product is not registered within 60 days of installation, Trane’s Base Limited Warranty terms will apply. For complete, detailed information on your specific product’s warranty coverage, visit the product page or contact your independent Trane dealer.Trane Tonnage from Model Number. TTP018 = 1-1/2ton; TTP024 = 2 ton; TTP030 = 2 1/2 ton; TTP036 = 3 ton; TTP042 = 3 1/2 ton; TTP048 = 4 ton; Example of Trane Model Identification. The Trane model number is #TWE030C140B0, let’s try to decode this model number: TW = split component heat pump compatableThe unit is certified to UL 1995. Exterior is designed for outdoor application. Casing Unit casing is constructed of heavy gauge, galvanized steel and painted with a weather-resistant powder paint finish. The corner panels are prepainted. All panels are subjected to our 1,000 hour salt spray test.Package Unit Model Number Breakdown. How to read and decode Ducane serial numbers: There are 10 digits to Ducane serial numbers and there are two types of serial number. First type: 224678 0515 (Made up serial number) You will determine the month and the years from the last four digits of the serial number. 224678|05|15.Mar 22, 2022 ... Ran into a trane XV today that had a system communication error which could be multiple issues. Long story short located the issue and ...Contact customer service. Ask about Trane products, warranty, and dealers. Our customer service agents can answer your general HVAC questions. Contact a dealer. A dealer can help with your specific questions about buying, replacing, operating, or maintaining your HVAC system. You can also schedule a visit to get a quote.The Trane model number nomenclature for central air conditioners and heat pumps is explained below in this Trane model lookup. ... Trane age of unit - here is how to read a Trane serial number: For units made from 2002 to 2009, the first number represents the year: 2 is 2002, 3 is 2003, etc. The next two numbers are the week of the year, so 01 ...

Here’s a quick serial number lookup that will tell you the Bryant age of unit. This page explains how to read a Bryant serial number. Bryant HVAC Age. The first two numbers represent the week of the year, 01 for the first and 52 or 53 for the last. The second two numbers represent the year – 97 is 1997, for example, and 08 is 2008.Keep reading to learn more about the IRA, this exciting initiative, and how many of Trane’s energy-efficient residential heating and cooling systems are eligible for savings under this updated tax credit program. ... Trane offers several products that qualify for the 25C tax credit. For more information on cost and energy savings, including ... Get help with your system. Trane Home App. Easily adjust your temperature, set your schedule, and monitor your HVAC usage from virtually anywhere. Check out the app. Owner’s Manuals. Become an expert on your system, from technical details, to safety information, to troubleshooting tips. Find your manual. Max Number 1 = Single-Zone = Multi-Zone UL/Non-UL 1 = US / UL Rated 2 = Non US/ Non-UL Rated Generation Change A B C…. Capacity (Btu/h) 06 = 6,000 09 = 9,000 12 = … When the spreadsheet containing the data opens in Excel, highlight all the data by clicking in the box in the upper left corner to the left of “A” and above 1. This will select all of the text. Next, click on Data, then under Data click on Filter and select AutoFilter. This will create a drop-down box at the top of each column. This video shows how to tell the age and size of your Trane Air Handler. It also shows you what type of refrigerant the unit uses if it is R-22 or R-410A. Us...

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Food labels give you information about the calories, number of servings, and nutrient content of packaged foods. Reading the labels can help you make healthy choices when you shop ...In such cases, a simple Trane Thermostat Wi-Fi reset is all you need to get the system up and running. 1. Turn off the power to the HVAC system. Wait for about one minute. To ensure a successful reset, you can make use of a heat pump (if you have it). Use that to shelve the system for a few minutes.Trane Tonnage. Trane is the only brand we are familiar with that occasionally lists a two-digit number for the thousands of BTU rating that is not divisible by 6 or 12—but close. Here’s a rundown of the range you will encounter: 18 = 1.5 tons, 24 = 2 tons, 30 – 2.5 tons, 36 = 3 tons, 42 = 3.5 tons, 48 = 4 tons, and 60 = 5 tons.Step 1. Look at the first number on the outside unit's model number. The model number starts with a two or four. This number represents the type of refrigerant the system uses. Two stands for R-22 and four stands for R410A. Video of the Day. Step 2. Notice the next three letters. T stands for Trane. The following letter represents the product type.

2) Look for a sheet taped to the front of the air handler (indoor unit), where the HVAC contractor has listed the performance data for the system. 3) Some manufacturers encode the SEER rating in the beginning of the model number on the data plate of the condenser. For example, the “XC21” at the beginning of the model number of the …When the spreadsheet containing the data opens in Excel, highlight all the data by clicking in the box in the upper left corner to the left of “A” and above 1. This will select all of the text. Next, click on Data, then under Data click on Filter and select AutoFilter. This will create a drop-down box at the top of each column.When the spreadsheet containing the data opens in Excel, highlight all the data by clicking in the box in the upper left corner to the left of “A” and above 1. This will select all of the text. Next, click on Data, then under Data click on Filter and select AutoFilter. This will create a drop-down box at the top of each column.Feb 15, 2023 ... Low Ambient Control Model Number: Used With: FIALOAM001 6 to 25 tons with Symbio™ controls Introduction Read this manual...The easiest way to look Trane model number search is on the AC unit itself. Go to the condensing unit on the outside and look for the data plate stamped on the actual side of the compressor. Find the model number. Within this string of letters and numerals, you should find an even, two-digit number.4 days ago · Most model numbers begin with the series or equipment type. Consider the EL in this model number as a code name for a group of similar equipment. These letters or numbers group equipment into categories such as furnaces or air handlers. Condensing units, heat pumps, cooling or heating coils, and package units also follow this pattern. York New Serial Number -- October, 2004 to the present day. Here how to read the new serial number: W 0 E 4 298223. 1st digits W are Manufacturing Plant. This unit was made in Wichita. N = Norman. W = Wichita. A = Apodaca. S = Source One. 2nd and 4th digits 0 and 4 (number) is the year of manufacture.If you've misplaced the manuals, the Carrier model and serial numbers are usually on the unit itself, often at the back or inside the outdoor unit’s metal door. Look for a rating plate sticker on the top left; it should display both the model and serial number. Watch this short video for more details.July 22, 2022 | By Rene Langer | Reviewed by Eric Hinton. You can find the Trane tonnage and SEER in the 5 th, 7 th and 8 th characters of the Trane model number. The 5 th …Here’s what all the numbers and letters of your Trane model number mean: Type of hvac unit. TONS. Heating input. It has a modulating gas valve and a variable-speed blower motor that deliver consistent and dependable heat all winter long, all while cutting energy bills month after month. The Trane model is #TCD120C40CCA. 2 Tons 3 Tons 4 Tons …Trane Tonnage. Trane is the only brand we are familiar with that occasionally lists a two-digit number for the thousands of BTU rating that is not divisible by 6 or 12—but close. Here’s a rundown of the range you will encounter: 18 = 1.5 tons, 24 = 2 tons, 30 – 2.5 tons, 36 = 3 tons, 42 = 3.5 tons, 48 = 4 tons, and 60 = 5 tons.

customer tagging information, the unit serial number, the unit order number, the build-section position for installation, and the unit model number. Note: The unit serial number and order number is required when ordering parts or requesting service for a Trane air handler. Figure 1. Performance air handler section nameplate Agency listings and/or

Apr 23, 2012 ... Reading the Rating Plates of an Air Conditioner! Size, Refrigerant ... Low Performance Trane AC unit lack of maintenance serviced. Anti DIY ...I'm an HVAC enthusiast and a passionate writer dedicated to sharing valuable insights and practical tips about heating, cooling, ventilation, and air conditioning systems.Nov 6, 2017 · The wrong replacement component may not only cause the compressor to not run, but it also could cause damage to the compressor. When selecting a replacement component, you will need to have the make and model number of the compressor or accessory. If you opt to get an original equipment manufacturer (OEM) component, simply giving make and model ... Serial Number 19 34 6 0205 J 19: year of 2019 34: 34th week of the calendar year 6: 6th day of that week (1 = Monday, 2 = Tuesday… 6 = Saturday) 0205: the 205th unit Age: For units manufactured up through the 1970’s, the date of manufacture information is found as a number and a letter in the serial number where the number is the single digit year and the letter indicates the month. A=Jan, B=Feb, C=Mar and so on. Example: If you still need assistance in decoding the model number for your air conditioner ... System Reference Guide CITY MULTI® Outdoor Unit Model Number Reference Guide Note: Branch circuit controller required. • NTX (Heat Pump) • NTY (Cooling Only) • NTXM (Multi-Zone Heat Pump) • TRUZ (Heat Pump) • TRUY (Cooling Only) • models: 3 and 4 MSM (Heat Pump) • MSH (Hyper-heat) • N = Standard (No Coating) Capacity: 3–5 tonsMy Trane model # is: TTP018C100A2 and my serial number is: L26340Kff. Any help would be greatly appreciated!!! Last edited by beenthere; 06-10-2009 at 08:23 PM . Reason: Removed price.After the last two digits of the first digits, Trane model numbers often start with a series of letters. To give you an idea of the scale of things, consider this: 18 = 1.5 tonnes, 24 = 2 tonnes, 30 = 2.5 tonnes, 36 = 3 tonnes, 42 …Jul 22, 2022 · Where is the Trane model number listed? You’ll find it on the outside cabinet of the unit. It is usually on a metal tag or sticker that also includes the Trane serial number, volts, circuit capacity, fuse info and much more. Companies in the Industrial Goods sector have received a lot of coverage today as analysts weigh in on Illinois Tool Works (ITW – Research Rep... Companies in the Industrial Good...

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This video shows how to tell the age and size of your Trane equipment. It also shows you what type of refrigerant the unit uses if it is R-22 or R-410A. Usua...Get help with your system. Trane Home App. Easily adjust your temperature, set your schedule, and monitor your HVAC usage from virtually anywhere. Check out the app. Owner’s Manuals. Become an expert on your system, from technical details, to safety information, to troubleshooting tips. Find your manual.Model Family (Nominal Efficiency) 80 = 80% Non-Condensing 95 = 95% + Condensing Blower Type P = PSC Motor X = Constant Torque Motor V = Variable Speed Motor BTU Input (Nominal Heating Capacity) BTU/Hour x 1000 Type S = Standard system T = 40ng/J NOx L = 14 ng/J NOx Cabinet Width A = 14.5” B = 17.5” C = 21” D = 24.5” OrientationWhen the spreadsheet containing the data opens in Excel, highlight all the data by clicking in the box in the upper left corner to the left of “A” and above 1. This will select all of the text. Next, click on Data, then under Data click on Filter and select AutoFilter. This will create a drop-down box at the top of each column.To ascertain the tonnage of your Ruud HVAC system, inspect the model number. Focus on the second set of numbers within the model number. This figure will typically be divisible by 6 or 12, signifying the system’s nominal BTU in the thousands. Given that one ton of air conditioning corresponds to 12,000 BTU, and using the …In Style # 1 the 10 character serial number will consist of 4 numbers, a letter, and then 5 more numbers. Sample Serial # – 3709 E07806. Week: First 2 numbers represent the week from 01 – 52. The numbers here are 37, so the 37 th week, which is in September. Year: The 3 rd and 4 th numbers indicate the year from 85 – 99 (1985 – 1999 ...Trane - 4TTA3060A3000A 4 - R-410A Refrigerant T - Trane T- Split Cooling A - Light Commercial 3- 13 SEER 0 - Brazed Connections 60 - 60,000 BTUH Capacity A - Major Design Modifications 3 - Power Supply (200-230/3/60) 000 - Secondary Function A - Minor Design Modifications ADP - 50660D245B2722AP 50 - Slab Number (I don’t recognized this ...The traditional school model didn't work for you. You now have the choice to get a high school diploma online. Updated May 23, 2023 • 1 min read thebestschools.org is an advertisin...Keep reading to learn more about the IRA, this exciting initiative, and how many of Trane’s energy-efficient residential heating and cooling systems are eligible for savings under this updated tax credit program. ... Trane offers several products that qualify for the 25C tax credit. For more information on cost and energy savings, including ...Learn how to service, diagnose and wire Trane branded Samsung units with this comprehensive manual. Download or access online.Look for a number that is divisible by 6 or 12 somewhere in the center of the model number on the data plate at the side of the heat pump condenser (outdoor unit), like 12,18, 24, 30, 36, 42, 48, or 60. A ton of air conditioning equals 12,000 BTU's so, for example a “24” in the middle of the model number indicates that it is a 2-ton system ...If the manufacture date is missing or not legible, there are three ways that the manufacture year may be encoded in the serial number. It may be the first two numbers: Or only the first number of the serial number: Or, if the serial number starts with a letter, here is how to translate it: T = 1981, U = 1982, W = 1983, X = 1984. ….

Somewhere near the bottom of the data plate, and often in small letters, it will state whether whether the condenser is a heat pump (contains a device to reverse the flow of refrigerant from cooling to heating) or a cooling air conditioner (only functions in cooling mode, and usually part of a system with gas furnace). 9 - Name of Manufacturer.Here is an example of a Trane brand air conditioner and how to use its air conditioner model decoder: How Do I Read My AC Model Number? Let's look at a Trane brand air conditioner as an example. Capacity: Trane has used a number of different methods for encoding capacity information in the model number. It is commonly found in the first …Sep 1, 2023 · To ascertain the tonnage of your Ruud HVAC system, inspect the model number. Focus on the second set of numbers within the model number. This figure will typically be divisible by 6 or 12, signifying the system’s nominal BTU in the thousands. Given that one ton of air conditioning corresponds to 12,000 BTU, and using the equation 24 divided ... As with the BTUs, you can also opt to calculate it yourself. Multiply the BTUs of your cooling system by 1,000 hours (equivalent to 4 months). Multiply the watts used per hour of your cooling system by 1,000 hours. Divide the result of Step 3 by the result of Step 4 to determine the SEER rating.Model Numbers: WSC072H, WSC090H, WSC092H, WSC102H, WSC120H Model Numbers: W/DHC036H-W/DHC120H ... Read this manual thoroughly before operating or servicing this unit. Warnings, Cautions, and Notices ... Trane believes that responsible refrigerant practices are important to the env ironment, our cu stomers, and the air ...Age: For units manufactured up through the 1970’s, the date of manufacture information is found as a number and a letter in the serial number where the number is the single digit year and the letter indicates the month. A=Jan, B=Feb, C=Mar and so on. Example: If you still need assistance in decoding the model number for your air conditioner ...The date of production/manufacture or age of Oxbox® HVAC equipment can be determined from the serial number located on the data plate. Parent Company: Ingersoll Rand/Trane. Example serial number styles/formats found: Style 1: 20 12 40166J Legend: Year is RED - Month is GREEN - Week is BLUE. Style 1: 20 12 40166J.We built RTU Decoder with a mission to make life easier for professionals in the HVAC industry. Starting out with a serial number decoder for a few selected makes, you can look up equipment’s assembly month based on its serial number. Enjoy the convenience of decoding multiple units simultaneously with our batch lookup tool.Can anyone please tell me what these model numbers mean or where I can uncode them, thanks. Evaporator Coil: 4NXCB025AC. 4TXCA025BC3HCA. Reply. 02-05-2015, 11:21 PM #2.Registration can be completed online or by calling 1-800-554-6413. If the product is not registered within 60 days of installation, Trane’s Base Limited Warranty terms will apply. For complete, detailed information on your specific product’s warranty coverage, visit the product page or contact your independent Trane dealer. How to read trane model number, System Reference Guide CITY MULTI® Outdoor Unit Model Number Reference Guide Note: Branch circuit controller required. • NTX (Heat Pump) • NTY (Cooling Only) • NTXM (Multi-Zone Heat Pump) • TRUZ (Heat Pump) • TRUY (Cooling Only) • models: 3 and 4 MSM (Heat Pump) • MSH (Hyper-heat) • N = Standard (No Coating) Capacity: 3–5 tons , To View Runtime History on the Web Portal . Log in to the web portal at www.tranehome.com.; If you have multiple homes, select the home you wish to view. Select Climate from the grey menu on the left side of the page.; Locate the thermostat for which you want to see data and select View History.; Switch between Daily and Monthly views …, After the last two digits of the first digits, Trane model numbers often start with a series of letters. To give you an idea of the scale of things, consider this: 18 = 1.5 tonnes, 24 = 2 tonnes, 30 = 2.5 tonnes, 36 = 3 tonnes, 42 …, MODEL. 4TTZ0024A1 4TTZ0036A1 4TTZ0048A1 4TTZ0060A1. TONS. 2 Tons 3 Tons 4 Tons 5 Tons. Cooling Capacity (BTUH) 24,000 BTHU 36,000 BTHU 48,000 BTHU 48,000 BTHU * Up to 20 SEER . ... Trane Hyperion Air Handler: XR Series 4. MODEL. TAM4A0A18 TAM4A0A24 TAM4A0A30 TAM4A0A36 TAM4A0A42 TAM4A0A48 …, If your Trane serial number is a 9-digit combination of letters and numbers that starts with a number, then the first number is the year. This company again made changes in the year 2010. The first two digits of the trane serial number lookup age are the year. There can be variations in serial number formats, especially in older or special models., When you’re in the market for a new car, it can be difficult to know which one is right for you. With so many different models, features, and options available, it can be hard to m..., Here is an example of a Trane brand air conditioner and how to use its air conditioner model decoder: How Do I Read My AC Model Number? Let's look at a Trane brand air conditioner as an example. Capacity: Trane has used a number of different methods for encoding capacity information in the model number. It is commonly found in the first …, Feb 12, 2010 · i own a trane xe 80 model number tud100c93680 and i want to match it with a trane a/c, what a/c should i buy for a 3 ton or 4 ton unit. and what is the fan cfm, thanks. steven … read more BillyHvac , May 19, 2023 ... The unit will run in each mode for 30 seconds, scrolling through all modes (relevant to that specific model). It will exit test mode ..., Goodman: The first two numbers in the serial number indicate the year of manufacturing. The third and fourth numbers indicate the week of the year it was manufactured. Trane: Typically has the year of manufacturing printed elsewhere on the data tag. Mitsubishi: The first number in the serial number indicates the year of manufacturing. You must ..., Reader Q&A - also see RECOMMENDED ARTICLES & FAQs Question: - owners manual for a trane central air unit manufactured in 1988. David 31 May 2022. Where can I get an installation or owners manual for a trane central air unit manufactured in 1988 the model number is TTJ736A100A0 AND SERIAL NUMBER C50248563 I WOULD REALLY APPRECIATE SOME HELP, Static Pressure Transducer output voltage at RTAM J1-3 is less than 0.25VDC. The transducer output is open, shorted, or the transducer is reading a negative supply air pressure. HEAT + COOL + SERVICE. Static Pressure High Duct Static Trip. The static pressure has exceeded 3.5" W.C. three consecutive times. Ground wire on transducer is open., About This Manual. This manual describes the installation of with recommended wiring, piping, and mounting of single-duct, dual-duct, fan-powered, and low-height VAV terminal units, and chilled water sensible coil terminal units. See also the following reference documents: BAS-SVX40-EN —Wireless Comm IOM., 3.1 Model Numbering Systems Introduction All Lennox product is set up with a systematic coding system for both model numbers and serial numbers. Unit model number (including any dash numbers) and serial number must always be used when referring a problem to Lennox in regard to repair parts, literature, wiring diagrams, etc. Use of, The name of the app you will use (Trane Home) The colors and logo on the app (now Trane red) The emails you receive will now read Trane instead of Nexia. What action is required on my part? None! Your app will automatically update to the new branding with an app update. If you have automatic app updates on your phone, no action will be required., How to Decode. First letter: The model number starts with 4. Second letter. The next 3 letter represents the product type. The fifth number is for unit’s Seasonal Energy Efficiency Ratio. The six letter. The seven and eight number indicate tonnage. The nine letter represents the age., When you own a Craftsman tool or piece of equipment, you know you can depend on quality and exceptional workmanship. Built to stand the test of time, the Craftsman brand is synonym..., 2) Look for a sheet taped to the front of the air handler (indoor unit), where the HVAC contractor has listed the performance data for the system. 3) Some manufacturers encode the SEER rating in the beginning of the model number on the data plate of the condenser. For example, the “XC21” at the beginning of the model number of the …, Max Number 1 = Single-Zone = Multi-Zone UL/Non-UL 1 = US / UL Rated 2 = Non US/ Non-UL Rated Generation Change A B C…. Capacity (Btu/h) 06 = 6,000 09 = 9,000 12 = 12,000 15 = 15,000 18 = 18,000 24 = 24,000 TR = 30 = 30,000 36 = 36,000 42 = 42,000 48 = 48,000 60 = 60,000 How to Read a Model Number Brand Name T = Trane Model Family P = P-Series ..., No matter how old the unit is, you are possible to find this figure. The ANSI rating is easy to read and understand without the need for you to decode the serial number. Decoding the trane furnace serial number, however, may involve a bit of complex task. There are two serial number formats used in trane furnace: Trane Furnace : 2002 and Newer ..., HVAC BRAND MODEL NUMBER NOMENCLATURE. Select one of the drop-down lists below. that corresponds to the FIRST letter. of your HVAC brand name. Then make your selection from the list. HVAC - A. HVAC - B. HVAC - C. HVAC - D., 14.7 – 1.0 = 13.7 kW Heating Capacity Step 1 Calculate the building heating load using the Trane calculation form or other standard accepted method. Step 2 Size the equipment using Table PD-5 to match the heating loads at design conditions., To read Trane furnace codes, you need to check the color and the number of flashes of the LED display. Each color and number combination has a different meaning and indicates a different issue. ... You should replace the pressure switch with a new one and make sure it is compatible with your furnace model., Even with its free price point, Loyverse has most features found in pricier subscription models. Read our Loyverse review. Retail | Editorial Review REVIEWED BY: Meaghan Brophy Mea..., DECODING OF MANUFACTURER MODEL NUMBERS. The Department used manufacturer model numbers, among other furnace characteristics, to determine …, This video provides helpful tips to identify where the model number is located on a furnace. Part testing, repair procedures and replacement parts are not de..., • The. model number label (Remove from. Air Cleaner. number label to furnace. Humidifier • serial number label is located on the bottom unit. (near furnace Energy Recovery. • …, i own a trane xe 80 model number tud100c93680 and i want to match it with a trane a/c, what a/c should i buy for a 3 ton or 4 ton unit. and what is the fan cfm, thanks. steven … read more BillyHvac, Jul 2, 2017 ... Save 8% at TrutechTools.com by using the "workingjoe17" coupon! Join the fun on the website! http://workingjoesroundtable.com/ The Facebook ..., MODEL NUMBER NOMENCLATURE. HVAC units are identified by their multiple-character model number that identifies a particular type of unit. Below you will find a partial explanation of the alphanumeric identification code (aka Model Number Nomenclature). Our samples have been simplified to concentrate more on the location of each individual …, My Trane model # is: TTP018C100A2 and my serial number is: L26340Kff. Any help would be greatly appreciated!!! Last edited by beenthere; 06-10-2009 at 08:23 PM . Reason: Removed price., How do you read a Trane furnace model number? How to Decode. First letter: The model number starts with 4. Second letter. The next 3 letter represents the product type. The fifth number is for unit’s Seasonal Energy Efficiency Ratio. The six letter. The seven and eight number indicate tonnage. The nine letter represents the age., Locating the Model Number. The model number is typically located on a label on the outside of your AC unit. The label may be located on the back, side, or bottom of the unit. Look for a label with the manufacturer's name, model number, and serial number. The model number may be a combination of letters and numbers, and it can vary in length ...