If the orafice is to large in the distibutor of an evap coil would it cause a flooding condition? What are the conditions it would cause. We installed a 12ft mdmt case and a condensing unit and it would not pull down to suction and run a high cond temps. We have installed many of these combos and have not had an issue. The system was evacuated and a new txv installed . I installed a larger condensing unit today. It will pull down but my amp draw is high and the txv is only open one turn. the case is 18000 btus and I have a q body with a b B cartridge. I tried an A cartridge but it didn't feed to well. I was thinking maybe to large of an orafice in distributor. A spent a day giving the numbers to our engineering department to run only for them to tell me it should work.The condensing unit is a three ton unit.