I went back to school for HVAC residential and im a little new to refrigeration and I would greatly appreciate some help. Most of the stuff ive worked on has been in meat packing plants on large scale freon or ammonia and only for a short period of time. Small systems are kicking my .
Im working on a Manitowac Q series QY0454a Ice machine. Originally the customer cleaned the unit and it wouldnt make any ice. Ambient air was around 80, head was at 200 and low was 25. Noticed the the high side schrader valve leaked so I added 2 oz, Manitowac rep suggested adding some to see if it would make ice. It did. Total charge on unit is 24 oz 404a. I pulled the charge, installed a new valve along with a filter drier. Started unit up and now my pressures are steady around 290 and 60. Called manitowac again and they said my pressures should be around 330 and 35 after things settle down. Said the TXV was flooding the evaporator. I notice the compressor was starting to sweat also. what could I have done to trouble shoot this correctly and figure this out on my own.