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Seresco Dehumidifier Submittal 2.3 CABINET A. All sheet metal and steel used in the cabinet shall be automotive grade galvanized G90. B. The cabinet shall have a base frame. The frame shall be 6" formed 12 gauge mill galvanized G90 steel and allow access to the drain connection through forklift slots. C. The cabinet floor shall be epoxy painted 16 gauge mill galvanized G90 steel shall be mechanically fastened to the structural base frame of the unit. D. The cabinet partitions and doors shall be 20 gauge galvanized G90 steel with a mill applied zinc phosphate primer followed by an exterior grade silicone modified polyester top coat. All panels shall be engineered with structural bending for maximum rigidity. The entire cabinet shall be painted internally and externally. E. Each unit shall have a built-in electrical control panel in a separate compartment in order not to disturb the airflow within the dehumidifier during electrical servicing. All electrical components shall be mounted on a 16 gauge sub panel. F. The unit shall have two built-in air filter racks with separate access door with compression fasteners. The filter rack shall be suitable to handle 2" 30% ASHRAE filters and 4" 90% ASHRAE filters. The access door shall be fastened with thumb -screws. G. The unit shall be equipped with an opening suitable for connection of a duct to admit outdoor air to comply with ASHRAE Ventilation Standard 62-1999. Outdoor air intake assembly shall have a built in air filter rack with separate access door and manual air balancing damper. H. The cabinets are mechanically assembled with stainless steel 5/32" sealed pop rivets. Where bolts are required 3/8" stainless bolts shall be used with the use of captured square nuts. I. The unit shall have the compressor, blower motor, receiver, solenoid valves and the electrical panel in a separate compartment out of the processed air stream. All components shall be serviceable while the unit is in operation without disturbing the airflow. 2.4 INSULATION A. Entire coil section shall be insulated with one (1) inch thick fiberglass duct liner insulation, approved for 250: F operating temperature and up to 5,000 fpm air velocity. Insulation surface shall be coated with an anti microbial layer and shall be protected against perforation and fiber air entrainment by a reinforcing mesh. Fire resistance rating to conform to NFPA Standard 90A. Sound attenuation coefficient shall be not less than 0.64 at a frequency of 1 000 Hz as per ASTM Standard C423. Thermal conductivity shall be not more than 0.232 Btu/in•h•sq ft•F at 75 F. Insulation shall be securely fastened with approved adhesive and mechanical fasteners. 2.5 EVAPORATOR AND DEHUMIDIFIER COILS A. Shall not be less than six rows deep, 10 FPI for maximum moisture removal capacity with air velocity not to exceed 350 fpm, with �6 inch OD seamless copper tubing mechanically expanded to assure high heat transfer. B. Fins on coils shall have a coating corrosion protection that complies with ASTM B117/D1654 and ASTM D2126 for corrosion resistance against common acids, salt and gases. C. Coil shall have 18 -gauge gafvanized casing and end plates. D. Coil shall be factory tested at air pressures not less than 400 prig in a water bath.