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This article provides help in decoding air conditioner, boiler, furnace, heat pump, water heater data tags and determining the age, model, or specifications of that equipment. Here we explain the meaning of each of the data names and contents of typical air conditioner system data tags. The photo shown here is for a conventional (non-split) residential air conditioning compressor unit. Sketch at left on guessing the size of an air conditioner system is compliments of Carson Dunlop Associates. The LRA of electric motors is 700% - 850% of rated current of the motor (or in some sources 5 to 7 times greater than RLA or FLA - a lot. The relationship between the LRA and full load amperage (FLA) varies depending on the design of the electric motor being rated.
If MOP is specified, the breaker or fuse protecting the equipment should match this number. The National Electrical Code (NEC) specifies the degree to which a breaker or fuse may exceed the RLA. Rated Load Amperage or Running Load Amperage - RLA, also called Rated Load Current or RLC on some equipment. We sometimes can guess the size (tons of cooling capacity) of an air conditioning compressor by dividing the RLA number by 6, 7, or 8. Full Load Amperage - FLA full load motor current draw, level at which the motor can be operated without damage. If an electric motor is trying to run at more than its rated horsepower, it will draw more than its FLA current. Maximum Continuous Current - MCC not usually supplied, this is the most current that the compressor can draw without being damaged.
You will usually find this data in the bright yellow EnergyGuide sticker that is more often on a side of the equipment rather than encoded in the equipment's own data tag. Refrigerant type is shown somewhere on every air conditioner, heat pump, or other cooling compressors. Modified, damaged, or torn air conditioning equipment information data tags can make age, capacity, and repair of any equipment more difficult. Sometimes when equipment data labels are removed or obscured a building buyer or a home inspector may raise a concern that the unit installed was different than that which the was ordered or that it is of questionable origin. But Ratib Baker, a member of member of Refrigeration Service Engineers Society (RSES), informs us that during the 1980's HVAC equipment manufacturers used a type of label which lacked UV resistance, faded, cracked, and eventually peeled away from the equipment, making equipment identification and ordering of replacement parts difficult. Where a data tag or label on equipment is damaged or missing, check further for more label data including inside the unit's enclosure. What we can say from the label in the photograph above is that by 2007 when the photo was taken by an ASHI inspector, this particular equipment was at least 23 years old - older than its usual anticipated life expectancy: the Singer brand on air conditioners was dropped in 1984. Where to Buy Carson Dunlop Associates' Technical Reference Guide decodes equipment data tags for air conditioners, heat pumps, etc. Carson Dunlop Associates' Technical Reference Guide (below) provides the most extensive HVAC equipment data tag decoder & other information to determine the age of boilers, furnaces, water heaters, air conditioners, and heat pumps by decoding the product serial number.
The Carson Dunlop Technical Reference Guide provides both equipment data tag decoding data and also manufacturer contact information as well as historical dates for many brands of heating and cooling equipment. Especially when equipment is old or has been located outside where its data tag can become obscured, faded, or damaged, it is easy to confuse as certain numeric digits some alphabetic characters, and vice versa.
But the GE serial number codes on air conditioners & heat pumps used letters (N-Z = months Jan-Dec) and Year A-Y = 1944-1964, then repeated).
Is it possible you are mis-reading a letter "Z" as a numeric "2" or a P or R as a "9" and an "S" as a "5" ? Examples of troubles reading old fuzzy or partly obscured serial numbers or model numbers on HVAC equipment are in our article just above.

Attached is the current unit in operation, and there a total of four (4) located in separate spaces within the unit. Can you please tell me if you know what kind of a unit this is from the poor quality photo (Command-Air(?)), and if there are modern replacements I can look into that possibly can be controlled from a wall plate control next to a light switch (for example).
Typically in a high rise apartment the energy source for heating and cooling will be piped from a common building source. The photo was a poor shot of the model label sent by the contractor currently remodeling the apartment. Ia€™m not sure about the building supply details yet, since I have not received information from the contractor, but Ia€™m just trying to find a comparably model to replace this unit(s).
Command Aire brand was later bought by Trane - so when you know what type and model you've got installed that'd be a place to start looking for a compatible replacement. When you have a clear image of the unit's data tag you'll see brand, model, serial number that will decode into just what is installed. No we do not generally see the SEER rating encoded nor explicit on an HVAC equipment data tag. Continue reading at SEER RATINGS & OTHER DEFINITIONS or select a topic from the More Reading links or topic ARTICLE INDEX shown below.
Jill contact information for Carson Dunlop Associates data tag decoding book is given in the article above as well as at the Citations at the end of this article. NATE is supported by ASHRAE, the US EPA, and a host of other trade and professional associations. Our recommended books about building & mechanical systems design, inspection, problem diagnosis, and repair, and about indoor environment and IAQ testing, diagnosis, and cleanup are at the InspectAPedia Bookstore.
Complete List of Air Conditioning & Heat Pump Design, Inspection, Repair Books at the InspectAPedia Bookstore. The Illustrated Home illustrates construction details and building components, a reference for owners & inspectors.
Get more photo about home decor related with by looking at photos gallery at the bottom of this page. We are want to say thanks if you like to share this post to another people via your facebook, pinterest, google plus or twitter account. Right Click to save picture or tap and hold for seven second if you are using iphone or ipad. We include examples of how to make use of the data to estimate equipment age, capacity, and even its condition.
As we cite at REFERENCES, Carson Dunlop also provide a Technical Reference Guide with extensive details that aid in decoding HVAC equipment serial numbers and data tags. The serial number of modern HVAC equipment encodes the year and month of manufacture - thus the age of the equipment is shown.
The motor's circuit breaker, especially on an air conditioning system which can draw high initial amps (LRA) will be sized to protect the electrical wiring of the motor circuit, but the breaker also will be chosen to tolerate a brief, high initial current draw to avoid nuisance tripping.
Finally, an air conditioner motor will also draw its LRA current if the motor is frozen or stuck or has bad bearings - which we hope will quickly trip the circuit breaker or blow the circuit fuse. Motors can normally operate fine at voltages within 10% of the rated voltage level on the data plate. Carson Dunlop provides a manual that decodes more of that data so that you can know the age of the compressor or air handler. Baker wrote (October 2008) that in the 1980's "the [HVAC compressor] label's protective mylar surface was damaged by the printing of the model and serial numbers and the electrical data which allowed the UV from the sun to destroy those areas. Service technicians may have written the model and serial number data in indelible marker, or the manufacturer may have provided a second data label inside the unit - check HVAC equipment with lost or damaged labels to see if you can find that data elsewhere. Included in the manufacturers listed are also makers of ancillary equipment such as controls, circulator pumps, etc., not just boilers, furnaces, and heat pumps themselves.

So if information about model numbers or serial numbers for a given manufacturer specifies that that company use a mix of alphabetic and numeric characters (E.G. Your serial number does not conform to the known codes for General Electric air conditioners. So if your 2 and 5 are really SS the unit could be as old as May 1959 or perhaps more likely, as recent as 1980. You'll want to know what your building supplies before thinking about replacing the equipment.
There's little point in looking for equipment and prices before you know what kind of equipment works with your buiding's infrastructure. The Infinity Model 24ANB1 is designated with MODEL NAME INFINITY21 while the Infinity Model 24ANB6, rated at a seer of 16.5 is designated with MODEL NAME INFINITY16. For example within the Infinity product line by Carrier, two Infinity Models designated INFINITY17 are rated at SEER 18. Send along a photo of the data tags on your equipment if you can - use the CONTACT link at the top or bottom of any of our pages. The text is intended as a reference guide to help building owners operate and maintain their home effectively. For equipment where the month and year of manufacture is not stated in plain English, Carson Dunlop provides a Technical Reference Guide manual that decodes that data. LRA on an air conditioning compressor describes the amperage drawn by the motor briefly during motor startup. In other words, the inrush current, because it is brief, does not need to figure in the selection of the wire sizing when wiring or fusing the motor, except to avoid nuisance tripping.
For more accurate means of determining air conditioner cooling capacity by several means including decoding the data tag, see COOLING CAPACITY, RATED. Upon discovering that they did not stand up to weather, most manufacturers started putting a second label inside the electrical compartment.
You may also find equipment identification details in the installation and service manuals for the equipment if those have been kept in the building. I THINK that a reason for this is that the net SEER rating for a given air conditioner or heat pump depends on how a combination of components operates together while certain individual components might be used in more than one set-up.
In air conditioning systems, typically a motor provides about one horsepower (HP) per ton of cooling capacity. The installation date of air conditioning equipment may be recorded on a service company's data tag, on receipts, or even inked inside of the steel cabinet of the equipment.
Special Offer: For a 10% discount on any number of copies of the Home Reference Book purchased as a single order. Because it takes a lot of energy (torque) to get the still parts of an electric motor turning, LRA will always be higher than the current used to keep the motor turning once it has started (FLA or RLA).
Galow specializes in residential construction including both new homes and repairs, renovations, and additions.
Thanks to Alan Carson and Bob Dunlop, for permission for InspectAPedia to use text excerpts from The Home Reference Book & illustrations from The Illustrated Home.
This is particularly true if the motor has an additional load (resistance to turning) at startup, such as trying to start an air conditioning compressor against refrigerant head pressure inside the compressor unit. Carson Dunlop Associates' provides extensive home inspection education and report writing material. Special Offer: For a 5% discount on any number of copies of the Home Reference eBook purchased as a single order.

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