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How to calculate the capacity for the unit using LRA

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  • Thomas Woodburn
    Thomas Woodburn Aug 20, 2017

    10 ton compressor

  • Thomas Woodburn
    Thomas Woodburn Aug 21, 2017

    Actually I'm not positive about that I'm sorry.

  • Thomas Woodburn
    Thomas Woodburn Aug 21, 2017

    The only thing I found is the inlet is 1 3/38, outlet 7/8. Need model number of unit it came out of.

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Ditto on Thomas's comment. You don't size capacity by electrical measurements. Calculate by manufacturer's information that are given in the model number. Please post the model number and we can/may be able to tell you the tonnage/capacity.

Posted on Aug 20, 2017

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You don't. Obviously the higher the locked rotor amps the larger the compressor the larger the unit. What's the model number?

If you need further help, reach me via phone at https://www.6ya.com/expert/thomas_092728000e6acb79

Posted on Aug 20, 2017

  • Mohammed fahmi Aug 20, 2017

    This is a model number Zr160

  • Mohammed fahmi Aug 20, 2017

    I need how to convert LRA to ton

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Posted on Jan 02, 2017

hxn1

hasan zaman

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SOURCE: what is LRA in compressor. whether LRA is used to

LRA is Lock rotor amps.
It is according to compressor capacity.

Posted on May 18, 2011

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2 Answers

How many LRA in 20562BTU


That makes no sense. LRA is going to be for a motor or compressor. I've never heard of a 20562 BTU machine. You have to read the data plate on the machine, either indoor or outdoor unit will tell you. If you can't read the data plate turn the power off and look at the data plate on the actual motor itself. Good Luck!!

If you need further help, reach me via phone at https://www.6ya.com/expert/thomas_092728000e6acb79

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LRA is locked rotor amps. Likely referring to your compressor. If i had to guess i would say 1.5 ton because 42 is not much. You mostly need model number to determine capacity.

If you need further help, reach me via phone at https://www.6ya.com/expert/thomas_092728000e6acb79

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For example if your LRA is 60.6 amps if you multiply this by 115 you will get roughly 7000 watts at start-up.

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What is the difrent between LRA and BTU ?


One really has not much to do with the other directly



BTU - British Thermal Unit.- A heat measuring unit. IE:12,000 BTU (British Thermal Unit.) The amount of heat required to melt one ton of ice.


LRA - Lock Rotor Ampere-LRA is nothing but locked rotor current , generally it is located on compressors name plate, when ever pistons locked at a particular position the rotor does not move further at the time rotor draws large current, that current is located on name plate, by seeing that LRA we can know compressor rotor was locked

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