Gefriergerät Stirling Ultracold SU780XLE

Stirling Ultracold SU780XLE upright ultra-low temperature freezer with 27.5 cu. ft. (780 liter) of storage capacity, rated for operation down to -86 degrees C. The cabinet uses a free-piston Stirling engine cooling platform rather than a conventional cascade compressor system, with a small hydrocarbon (ethane) refrigerant charge, and carries an ENERGY STAR label on the door (photo 1). Setpoints are entered on the color touchscreen controller mounted in the green upper console. The manufacturer's data plate (photo 4) identifies the unit as model SU780XLE, serial number 19100-10990, year produced 2019, built by Global Cooling Inc. of Athens, Ohio. Per the nameplate: interior volume 27.5 cu. ft. (780 liter), net weight 625 lbs. (283 kg), exterior dimensions 78.5 in. H x 34.2 in. front-to-back x 36 in. W (1994 x 869 x 914 mm), input 120-240 VAC 50/60 Hz, maximum current 10 amps at 120 VAC (5 amps at 240 VAC), maximum input power 1200 watts, refrigerant ethane 3.2 oz (90 g). The plate also shows cULus listed and CE markings. The freezer is configured with a solid outer door and individually gasketed inner compartment doors with green latches, and is fitted with shelving and inventory racks (photo 3). The touchscreen was lit and reading -80 degrees C at the time of the site visit (photo 2), and the interior was cold with normal frost accumulation; the unit was still in service in a biopharmaceutical laboratory and the door sheet notes it as being emptied. It stands on the floor on casters and plugs into a standard outlet.