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
How to calculate the capacity for the unit using LRA
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