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Old 04-28-2011, 09:04 PM   #1
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Condensing unit/A-coil help


I am looking to add central air to the house we just purchased this past fall.
The house is 1287 on the main, 583 lower and 217 upper level for square footage.

I need to figure out how large of an A-coil to buy, and what tonnage I would need.
I picked up a York Model H1RA048S25G condensing unit. But nowhere on the unit does it say what ton it is rated at.

It has the model # listed above.
7lbs 5oz R22 charge
High side pressure 350
Low side pressure 300
and the serial number.

I have called the local and they were no help at all.

Any help would be appreciated.
Thanks
Willis

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Old 04-28-2011, 09:09 PM   #2
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Condensing unit/A-coil help


you bought most likely WAY too big of a unit, you bought a 4 ton unit 48,000 btu

you need to return the unit and have a load calculation done on your home.

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Old 04-28-2011, 09:14 PM   #3
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Condensing unit/A-coil help


Quote:
Originally Posted by hvactech126 View Post
you need to return the unit and have a load calculation done on your home.
Not what I wanted here but thank you.

Next question is how to I calculate the load on my home?

Thanks
Willis
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Old 04-28-2011, 09:18 PM   #4
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Condensing unit/A-coil help


Quote:
Originally Posted by shoothebunnies View Post
Not what I wanted here but thank you.

Next question is how to I calculate the load on my home?

Thanks
Willis

http://www.mrhvac.com/loadcalcshortform.htm

http://www.hvaccomputer.com/ ==> $49
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Old 04-28-2011, 09:20 PM   #5
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Condensing unit/A-coil help


there is software you can buy on the internet (google manual J load calculation) or pay a local contractor to do it for you.
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Old 04-28-2011, 09:21 PM   #6
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Condensing unit/A-coil help


Thanks for the help guys!
Willis

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