Rebalancing 120- and {208} 240-volt loads may be necessary. Now you’ll have three phases 120v ø-n instead of two. Scott35 has posted some real gnarley sample spreadsheet panel schedules to track old and future. https://www.electrical-contractor.n...m=Technical+Reference+Area&number=15

Remember that motors operate somewhat the opposite—constant kVA versus constant resistance—depending on load. Lower voltage usually means increased current.