The former Cardiff man was dismissed for picking up two yellow cards in Saturday's 2-0 defeat to Brighton and will serve a one-match ban when the Lilywhites visit Turf Moor.
Fellow shot-stopper Alex Cisak made his Clarets debut when he came on to replace Heaton at the weekend and he is expected to deputise once again.
Defenders Ben Mee and Michael Duff are in contention to make their first appearances of the season after recovering from hamstring injuries.
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