A 15 amp breaker is allowed to be loaded 100% up to 3 hours, longer than 3 hours the load may only be 80% which is 12 amps.
11 amps on a 15 amp breaker is fine.
However you said this is a condensing unit, the label should say what size overcurrent protection to use.
[This message has been edited by iwire (edited 10-12-2004).]
