Mon Mar 2023

How do you tell the tonnage of a carrier model number?

Carrier is a popular brand for heating, ventilation, and air conditioning (HVAC) systems. When you are in the market for a new Carrier unit or need to replace a part, it's important to know the tonnage of the unit you require. The tonnage of an HVAC system refers to its cooling capacity, measured in British Thermal Units (BTUs) per hour. Here are some steps you can take to determine the tonnage of a Carrier unit from its model number.

Step 1: Locate the Model Number

The model number is usually located on the manufacturer's label on the unit itself. If you can't find the label on the unit, check the documentation that came with the system. You may also be able to find the model number by checking the Carrier website or contacting customer support.

Step 2: Decode the Model Number

The model number of a Carrier unit typically contains information about the unit's type, size, and efficiency rating. The following is an example of a Carrier model number and how to decode it:


Copy code

24ABB336A003 - 0T

In this example, the model number is broken down into several sections:

  • 24ABB: This section represents the product series and type of unit.
  • 336: This section indicates the cooling capacity of the unit in nominal tons.
  • A: This section represents the product generation or version.
  • 003: This section represents the power supply code.
  • 0T: This section represents the major design modification.

Step 3: Determine the Cooling Capacity

The cooling capacity of a Carrier unit is represented by the middle three digits of the model number. In the example above, the cooling capacity is 336. To determine the tonnage of the unit, you need to divide this number by 12,000. In this case:

Copy code

336 ÷ 12,000 = 28 tons

Therefore, the tonnage of this Carrier unit is 28.

Step 4: Check the Documentation

To be sure of the tonnage of your Carrier unit, check the documentation that came with the unit or contact Carrier customer support. The documentation should specify the tonnage of the unit as well as other important information, such as the recommended maximum size of the unit's air ducts.

In conclusion, determining the tonnage of a Carrier unit from its model number is relatively straightforward, provided you have the right information. By decoding the model number and dividing the cooling capacity by 12,000, you can determine the tonnage of the unit. If you have any doubts or concerns, it's always best to consult the documentation or contact customer support to ensure you have the correct information.

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