Determine tonnage of AC unit

I have a HEIL furnace AC setup. How can I detemine the tonnage of the AC unit.
The outside condensor info is Date: 11/87 Model: CA303VKA1 867 800040 Style: 30BC-00087CR S/N: L8744 22380 MFR No: NCA303VKA1
Any help will be appriciated.
Thanks, MC
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Are you sure of the model? Should be i.e. CA5530VKA1
But anyway, made 44th week in 87, 2.5 ton, 10 SEER unit.
Problem? Replacing?
If so, the contractor needs to perform a Manual J to insure the new equipment is properly sized.
~kjpro~
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2.5 tons...
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Thanks to all for the info .
The model was what was listed on the decal on the side of the outside unit.
Even though my system does cool enough, it does struggle on hotter days here in the humid southeast (I can water my lawn from the condinsation drain on those days !)
Had a friend in the business do the Manual clacs and due to the heat loss he came up with (not very effecient windows and need more insulation in attic) he said he would have went with a 3-ton unit for my size house. Also he said that with better insulation in the attaic I could still squese by with using a 3-ton with enclosing the garage, would also need to modify some of the ducting to get better flow for adding the garage which I had anticipated.
I was also thinking of adding addtional 600 Sq feet on back of garage, half would be an upstairs office on the new addtion.
If I did that and after having a more thorough calc done, would a two zone system be better? say devide living and bedroom areas and would two systems be just half each or at least total what a single system would be ? If a two system what areas would be best put on what zone ?
ThanksMC
in message

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I think if I was you I would probly look into putting a wall shaker on the garage / addition.......
IOW, how often will there actually be a need to keep those areas cool ???
--

SVL



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