How do you find the tonnage of an LRA?

Take model and serial label, within the model number you’ll find something like 036, 048, etc. this is your btu, or British thermal unit capacity. Every 12,000 BTU’s equals one ton, so an 036 would be a 3 ton and so on. Divide your Locked Rotor Amps by about seven will give an approximation of the current draw.

How do I know what ton my compressor is?

Divide the number listed by 12,000. This will tell you how many tons your HVAC compressor is. For example, if the BTU number listed is 36,000, divide it by 12,000 and you’ll see that you have a 3 ton unit.

What does compressor LRA mean?

Locked Rotor Amps
LRA – Locked Rotor Amps: The current you can expect under starting conditions when you apply full voltage. It occurs instantly during start up. RLA – Rated Load Amps: The maximum current a compressor should draw under any operating conditions.

What is AC tonnage?

Tonnage is actually a measure of how powerful an AC is at cooling down a space. Tons are units of cooling power, so when we say that a system is a “two ton” or “five ton” unit, we’re indicating how powerful it is, not its weight. One ton = 12,000 BTUs of heat removed per hour from a space.

What tonnage is my YORK air conditioner?

You can determine the size in tons of your York HVAC system by examining the model number on the data sticker at the side of the a/c condenser (outdoor unit). Look for first two numbers in the model number. They are divisible by 6 or 12, which represent the nominal BTU of the system in thousands.

How do I know what size my AC compressor is?

How to Calculate AC Compressor Tonnage

1. Measure the room’s area in square feet. For a square or rectangular room, multiply length by width.
2. Determine the area’s necessary cooling requirement in British Thermal Units (BTUs).
3. Add 4,000 BTUs if you are calculating for a kitchen.
4. Divide by 12,000 to convert BTUs to tonnage.

How do you calculate BTU for compressor?

BTU = Flow Rate In GPM (of water) x (Temperature Leaving Process – Temperature Entering Process) x 500.4*Formula changes with fluids others than straight water.

How do you read a carrier tonnage?

Look for the 7th and 8th digits, or maybe 8th and 9th digits, of the model number. It will be a number divisible by 6 or 12, and represents the nominal BTU of the system in thousands. A ton of air conditioning equals 12,000 BTU, and 48 divided by 12 equals 4, so the data plate below indicates the system is 4 tons.