When you wire funds into your Swan account, they will settle as US dollars. You will receive an automated email informing you that the funds have settled.
You can then choose when and how much to deploy at any given time using the "Convert Now" button. You can deploy your wired funds all at once or in tranches (maximum $50,000 per tranche).
Note: If you have an active recurring purchase plan, then some of your funds could automatically purchase Bitcoin because of your recurring purchase plan. For instance, if you have a $50/week plan and you wire in $10,000, you could end up automatically buying $50 of Bitcoin immediately.