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Old 10-13-2012, 08:04 PM   #1
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Adding a Hard Start Kit


Hi everyone!!!

I need to install a Hard Start Kit to my AC unit because the compressor is having a hard time to start with the voltage we get from the power company. I have read that I need to find out what type of compressor I have and/or my AC specifications. How do I do that? This is a residential unit located in Florida. Can you also suggest a Hard Start Kit brand based on your experience?

Thanks in advanced. RG

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Old 10-13-2012, 10:21 PM   #2
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Adding a Hard Start Kit


You just need to know the tonnage of your unit to order the proper hard start kit. Avoid any hard start kit that doesn't have 5-2-1 relay

http://www.five-two-one.com/.

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Old 10-13-2012, 11:50 PM   #3
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Adding a Hard Start Kit


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You just need to know the tonnage of your unit to order the proper hard start kit. Avoid any hard start kit that doesn't have 5-2-1 relay

http://www.five-two-one.com/.

Looks like they have overlapping kits, whats the difference between the U2 and U3? From a 4 ton perspective?
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Old 10-14-2012, 12:01 AM   #4
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Adding a Hard Start Kit


U3 is better for 4 and 5 ton. It has a bigger start capacitor (MFD).
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Old 10-15-2012, 04:50 PM   #5
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Adding a Hard Start Kit


My inside unit says

PH/HZ 1/60. Motor HP./F.L.A 1/3 3.2

rheem model rbhc-21j11sfg

I see that is a one phase and 60 Hz and 1/3 HP. Which one should I choose then?

Thanks,RG

Last edited by rgarcia1801; 10-15-2012 at 05:01 PM.
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Old 10-15-2012, 05:49 PM   #6
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Adding a Hard Start Kit


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Originally Posted by rgarcia1801 View Post
My inside unit says

PH/HZ 1/60. Motor HP./F.L.A 1/3 3.2

rheem model rbhc-21j11sfg

I see that is a one phase and 60 Hz and 1/3 HP. Which one should I choose then?

Thanks,RG
Get the Condenser model number.
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Old 10-16-2012, 05:47 AM   #7
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Adding a Hard Start Kit


you have a 4 ton unit. Get the CSR U3
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Old 10-16-2012, 05:49 PM   #8
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Here is the condenser model number:




Adding a Hard Start Kit-image-3756973635.jpg

Thanks
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Old 10-16-2012, 07:47 PM   #9
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Adding a Hard Start Kit


Three and one half ton unit
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Old 10-16-2012, 07:59 PM   #10
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Adding a Hard Start Kit


Sorry, your indoor coil is a 4 ton coil. Your outdoor unit is 3.5 tons.
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Old 10-16-2012, 08:09 PM   #11
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You need U2 for 3 1/2 ton condenser.
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Old 10-21-2012, 05:31 PM   #12
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Should I buy the run capacitor as well?

Thanks RG

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