I am currently working on a walk in freezer about 2.5 metres square, the system is on a copeland scroll condensing unit, the problem is the suction line is freezing up outside, it's on R404a and the suction runs at 18psig and discharge at 200psig, not too far out I thought?
There is no obvious damage to the pipes, the liquid line runs warm with a clear sight glass and the TEV isn't a block of ice? However the pipes leading into the evaporator are heavily iced up and so is the suction pipe outside.... What's going off lads?
Cheers
Matt