I am trying to install a 20 kW Generac Guardian natural gas generator. I believe this generator is rated for 145 LRA, but my current AC unit is 10+ years old, and pulls 165 LRA.
So, I'm looking to upgrade my 5-ton AC unit, likely to a Carrier model. It appears that the Performance Series 5-ton (24ACC6) has an LRA of 135 amps. Good, but it'd be better if there were some more wiggle room. See top of page 8 below:
http://www.docs.hvacpartners.com/idc...24acc6-2pd.pdf
On the other hand, according to the specs that I'm able to find online, the Carrier Infinity 5-ton (24ANB7) has an LRA of 118 -- great! See top of page 5:
http://www.docs.hvacpartners.com/idc...24anb7-1pd.pdf
However, my HVAC contractor informs me that the latest info available on the Infinity 5-ton lists an LRA of 159.6. That's not great.
Can anyone here help out? Which is correct? Thanks very much!
Instead of learning the tricks of the trade, learn the trade.
Add some insulation, get a load calc done, maybe you only need 4 tons.
look at a greenspeed. I susect lra would be a little lower.
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Wow, at least according to this, LRA is 42 !!
http://www.docs.hvacpartners.com/idc...25vna-01pd.pdf
Will look into this, thanks much for the recommendation.
rundawg: Do you happen to know if the LRA on the Performance is current as well (135), or did they make changes to that compressor as well?
It has a digital scroll... so theres a drive and its a permenant magnet motor, so it makes good low end torque andc doesnt need a huge electrically generated field to start spinning. Plus the drive has large capacitors as well. The greenspeed also produces more heat without strips at beliw about 40f, temps and if sized right will run almost continous. Factor in its cost over a larger generator.
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Sorry about that, I was thinking heat pumps.
In the latest 24ACC6 manual, the LRA is 135.