North Star Ice Equipment Ice Flaker. Model: M-40SS. Capacity: 20.2 tons per day of 1.5 to 2.0 mm thick ice with a -30˚F evaporator temperature, a 60˚F make-up water temperature and oil-free ammonia refrigerant. Stainless steel freezing surface area: 40 sq. ft. The model M-40 offers the following benefits: higher amount of ice production per ton of refrigeration than any other ice maker using an equally rated compressor, continuous ice harvesting with no defrost cycles, lessened refrigeration losses from insulated fiberglass enclosure and conversion of all make-up water to ice, thus eliminating waste. Connections: 2-1/2 in. suction line, 1-1/4 in. liquid line, ½ in. MPT oil drain line, ½ in. FPT Tank inlet water line, and a 1-1/4 in. FPT tank drain.(GS)(ACN453).