How does Engstrand blackmail the pastor into funding his sailor's establishment in the drama "Ghost"?

Jakob Engstrand is an alcoholic carpenter who is skillful at manipulating others. He plans to open a brothel for seamen and wants Regina, his daughter (though technically not his daughter, as he married Regina's mother when she was already pregnant by Captain Alving) to come work there. He manipulates Pastor Manders by starting a fire at the orphanage and making it seem like it was the Pastor's fault, then offering to take that blame if the Pastor will help him out with the seamen's "home."