Krack 3-Fan Ammonia Evaporator – 28.8 tons. Model: UDA. S/N: 368730A4. Refrigerant: recirculated bottom feed ammonia. 78 sq. ft of fin surface area with 8 fin variable coil design: 1-1/2 fins per inch first two rows , 3 fins per inch last six rows. Rated for 3hp at 1160 rpm (460/60/3 TEFC motors), 346500 BTUH, with a coil temperature of -40°F and room temperature of -28°F with a ΔT of 10° in room temperature. Features include: hot gas defrost and a stainless steel drain pan. Baldor Industrial Motor, 3 hp, 1140 rpm, 208-230/460 V, 10.2-9.6/4.8 amps, 60 Hz, 3 phase. Overall dimensions: 20 ft. 4 in. L x 6 ft. 8 in. W x 5 ft. 7 in. H. (ACN230-87). FAD