I am just out of Tech school and doing an internship with a local contractor. Would someone please explain this scenario. Heat pump in the lower level of a home. Suction pres. 53 Dis pres 260 dry bulb 72 outdoor 75, r-22. We did not get the WB. The tech said that the Trane chrg card says 0 superheat. Yes I know that subcooling is the deal here but there should be some superheat should there not?