Pulling outside air into the case is the exact way Corsair recommends running the coolers. The temps will actually be a better too.
You may still want to ensure that at least your rear fan is blowing air out of the case to suck out any heat the cooler adds to the system.
Remember that a normal cooler would put that heat into the case as well.
If your case only had those fans for exhaust, I would recommend running them as exhaust to remove heat from the case.