Unless the space being cooled has shrunk that is a vey bad idea that is going to led to a long list of repairs and bills in the future. Use the unit that is rated for your house size. Not larger or smaller as both will have costly reapirs for as long as you have the unit. It may be expensive now, but later there will be less to worry about.
53189
$15.00
It is a 3 ton unit.
The Carrier 38CQ039300 is a 3-ton air conditioning unit.
3
7 pounds
It depends on the brand, the efficiency, and the type.
10kw
This is a 10 SEER, 4 ton air conditioning unit.
The RAKA 036JAS is a 3-ton air conditioning unit.
The RBC-14J06NFD is a 1.5-ton residential air conditioning unit from Rheem.
I'm not an air conditioning expert, but I would expect that the compressor will run a lot more than it needs to. A 2 ton coil will not cool as much air as a larger capacity 3 ton coil. Experts?