Robert Gammon wrote:
5 ton compressor/condenser should always be matched with 5 ton
coil/evaporator.

Virtually all manufacturers have certified upsized coils for use with
their condensers.

Evaaporator coil size is a major factor in determining the balance
between sensible and latent heat removal. Larger evaporator coils
normally remove less humidity, because they operate at a higher coil
temperature/pressure ratio --smaller evaporator coils tend to
remove more humidity --because they normally operate at a lower
operating temperature. The SEER is usually slightly higher with larger
coils.

See ARI Primenet for specific ratings.

http://www.aridirectory.org/ari/unitary.html