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07-05-2010, 11:45 AM #1
What its horse power LRA = 49 and LRA = 58
Please help.
I gonna change window type aircoditioner the BTU is 24,000 and 18,000 and i have compressor LRA = 49 and LRA= 58. What is horsepower of that compressor. What LRA i will use in 24,000 BTU,
What number of microfarrad ( uf ) of capacitor i will use in 2 compressor.
How can i know the horsepower of window type aircon, in BTU, kj, Ampere, Watts, Ton.
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07-05-2010, 12:47 PM #2
Re: What its horse power LRA = 49 and LRA = 58
Last edited by goshen; 07-05-2010 at 12:51 PM.
THE DEFINITION OF A SMART PERSON IS ONE WHOM LEARNS FROM HIS MISTAKES!!!
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07-05-2010, 01:09 PM #3
Re: What its horse power LRA = 49 and LRA = 58
LRA = Locked Rotor Amperes.
18000 BTU is 2 HP
24000 BTU is 2.5 HP
for the firs one 40mf
for the second 50mf
you can tell the capacity of the compressor from the model number.
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07-05-2010, 01:32 PM #4
Re: What its horse power LRA = 49 and LRA = 58
Hi :
12000btu=1tr
and hp is by rule of thumb approximtly as quoted
but calculating watts and amps is directly voltage related!!
i think u will like this one :
http://www.mhi-inc.com/Converter/watt_calculator.htm
http://www.sengpielaudio.com/calculator-ohm.htmTHE DEFINITION OF A SMART PERSON IS ONE WHOM LEARNS FROM HIS MISTAKES!!!
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07-05-2010, 05:43 PM #5
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07-05-2010, 05:48 PM #6
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07-05-2010, 06:25 PM #7
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07-05-2010, 07:48 PM #8
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Re: What its horse power LRA = 49 and LRA = 58
When you changing compressor, try to stick with original one by model number. If you cannot, than you need to find displacement of original compressor to find replacement one with same pumping capacity. Or, you need to find capacity of original compressor at some standard condition like ASHRAE for AC (7,2°C evaporation and 54,4°C for condensation temperatures) and find replacement with same capacity at SAME conditions.
Horsepower (in cooling capacity) is of not much practical use here because of rounding practice. Since window type AC have usually capillary tube as expansion device it is essential (for proper work and compressor longevity) that compressor have as much as close capacity (at same conditions) or displacement.Last edited by nike123; 08-05-2010 at 07:22 AM.
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08-05-2010, 12:19 AM #9
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08-05-2010, 06:52 AM #10
Re: What its horse power LRA = 49 and LRA = 58
all the info you need is here, good luck.
http://www.panasonic.com/industrial/.../k-series.aspx
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08-05-2010, 07:59 PM #11
Re: What its horse power LRA = 49 and LRA = 58
Hi there i usually dont choose a comp by lra, but by nominal current in your case ,220v 24000btu would be approx 8 amps = 56 lra ,but as mentioned above ,a compressor should be replaced by the same make and model
this will save u time in instalation and running.THE DEFINITION OF A SMART PERSON IS ONE WHOM LEARNS FROM HIS MISTAKES!!!
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09-05-2010, 06:39 AM #12
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09-05-2010, 07:09 AM #13
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Re: What its horse power LRA = 49 and LRA = 58
Not exactly! Running current depend on compressor compression ratio and state of mechanical parts. These changes, but LRA is always same.
We have LRA => 5 to 7*FLA
FLA => Fixed number
Running amperes => lower than FLA
Do not compare compressors by amperage.
Only correct is:
- By displacement and same area of application (LT,MT,HT,AC)
- By same capacity at SAME RATED conditions and same area of application (LT,MT,HT,AC)
Last edited by nike123; 13-05-2010 at 08:13 AM.
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11-05-2010, 06:20 AM #14
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11-05-2010, 10:12 AM #15
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12-05-2010, 02:54 PM #16
Re: What its horse power LRA = 49 and LRA = 58
from where u takin the 56*100/500 and for other amirs plz give me the said mathod
thinks