We have a custom built brine refrigeration system installed servicing a commercial fishing vessel that has killed a compressor after 2 years, here are the system details. Any help would be appreciated in finding the cause of the problem?😁
brine system specs
compressor - bitzer 6je-33y (2 x cylinder unloaders) first unloaded set at -15c - -8c second unloaded -20c - -12c
condensor - bitzer 813hb water cooled condensor
refrigerant - r404a
brine evaporator - stainless steel spiral (flooded) x 6
tx valves - danfoss te5 no3 orifice
oil separtor - bitzer with temprite external oil float
brine tanks - 6 x 5tonne salt water entering at 26-29c pulldown time per tank 16hours
The issue we have is not with the operating parameters of the system once tank temperatures have been achieved but during the initial pull down phase upon start. For 6-8 hours we will have a suction temperature at the compressor service valve of 15-20c which causes the discharge temp to be around 83c would this temp be acceptable or should a liquid injection be used?