Chicago Fire Commissioner Jose Santiago on Wednesday defended his 60-day suspension of a lieutenant who refused to send underlings into an area where they might be exposed to Ebola but said the city will accept an arbitrator’s ruling overturning the suspension. Santiago said the decision not to appeal the arbitrator’s ruling had nothing to do with the no-confidence vote taken Sept. 21 by the Chicago Firefighters Union Local 2. Nor was it a response to the 2,300 people who signed union-circulated petitions expressing disappointment when the union thought the department would challenge the arbitrator’s ruling. “I made my decision based on the facts. . . . We gave it our best shot. [But] if you look at all of the facts, I did not feel confident that the city would win. . . . I did not want the city to lose,” the commissioner said.