SST Engineering Brochure - Evapco

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STAINLESS STEELE V APORATORSPRODUCT FEATURESSST Evaporators are available in three models each having awide range of capacities and material options.SSTM UNIT COOLERSSSTM Models are designed for low, medium and high temperatureapplications. These models feature axial fans andmany end user oriented features such as: One to Five Fan Models Capacities from 2 to 46 TR Hinged Fan Panels Sloped Top Panels Dual Sloped Full CoverageDrain PansSSTW WORKROOM UNITSLow velocity air units for processing rooms. These modelsfeature axial fans and many end user oriented features. One to Five Fan Models Capacities from 3 to 22 TR Hinged Access Panels Sloped Top Panels Dual Sloped Full CoverageDrain PansMATERIALS OF CONSTRUCTIONSTAINLESS STEEL COILSSST Evaporators are equipped as standard with Type 304LStainless Steel tubing with Aluminum fins. The stainless steeltubing meets the requirements of ASME B31.5 refrigerantpiping code.The round tubing is fit into the Aluminum fin plate andhydraulically expanded. This procedure provides more consistentcontact between the tube and the fin plate thanmechanical expansion. The entire coil is then pressure testedto 400 psig. Lastly, the coil is evacuated and charged with lowpressure Nitrogen prior to shipment.The Stainless Steel tubes are available in 5/8" OD. Coils arebuilt in 3 and 4 fpi as standard. Variable fin spacing is availableas an option.CASINGSSTM EvaporatorsStandard construction of the casing and drain pan is fromG-235 Hot Dip Galvanized Steel with options for Type 304Stainless Steel.SSTW EvaporatorsWorkroom units are manufactured with Type 304 StainlessSteel casing panels and pan cover. The fan motor base, innerpan and shipping/installation supports are constructed fromG-235 Hot Dip Galvanized Steel with options for Type 304Stainless Steel.SSTD EvaporatorsStandard construction of the casing and drain pan isG-235 Hot Dip Galvanized Steel with options for Type 304Stainless Steel.SSTD LOW PROFILE UNIT COOLERSDual coil models for low, medium and high temperatureapplications in rooms with low ceiling height requirements. One to Five Fan Models Capacities from 3 to 30 TR Hinged Fan Panels Dual Sloped Full CoverageDrain Pans2
E V APORATORSSTAINLESS STEELPERFORMANCE FACTORSThe capacity of SST Evaporators is based on R717 refrigerant with either recirculated or flooded feed. The heat rejection capacity of SSTEvaporators must be adjusted for different refrigerants and feed conditions. Multiply the factors listed in the table below by the coil performanceto obtain the new performance rating for the specific application. The factors vary based on refrigerant and coil temperature.SUCTION TEMPERATUREREFRIGERANT - FEED +40 +30 +20 +10 0 -10 -20 -30 -40R717 - DX 0.81 0.81 0.80 0.80 0.80 NOT RECOMMENDEDR22 - Recirculated & Flooded 0.95 0.95 0.95 0.93 0.92 0.91 0.90 0.88 0.87R22 -DX 0.79 0.79 0.79 0.79 0.78 0.77 0.74 0.70 0.63R404A/R507 - Recirculated & Flooded 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00R404A/R507 - DX 0.83 0.83 0.83 0.83 0.82 0.81 0.78 0.74 0.66R134aCONSULT FACTORYEVAPCO does not recommend direct expansion applications for R717 below 0°F suction temperature.NOMENCLATUREThe model number of ST Series Evaporators includes information about the product design and capacity. This EngineeringManual includes performance and technical data for SST Evaporators which are constructed with Stainless Steel coils andAluminum Fins as standard.S T --Coil MaterialS = Stainless SteelC = Copper# of Fans Capacity RatingBTUH/°F TD/10 (Frosted)TypeD = Low Profile Dual Coil Unit CoolersM = Dock/Small & Medium Unit CoolersW = Workroom UnitsFins per Inch3
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SST Engineering Brochure - Evapco

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