Stimmen - 5, Durchschnittliche Bewertung: 4.2
(
)
)
|
Anleitung Zusammenfassung
Chilled water, DX, and evaporative cooling options are also available for combination heating and cooling requirements. The DGX is designed for providing make-up air to commercial and industrial facilities. Airflow volumes range from 800 to 48,000 cfm with heating output capacities up to 4,800,000 Btu/hr. Durable Construction Designed for maximum weather resistance, DGX housings are constructed of heavy gauge G90 galvanized steel. Lifting lugs are standard. Direct Gas-Fired System • High quality cast aluminum burners with stainless steel mixing plates • Maxitrol electronic modulation burner control • Flame safeguard with digital fault indicator capability (over 400,000 Btu/hr) • 25:1 turn down ratio Control Center The control center includes the following standard components: • 24 volt control voltage • Magnetic motor starter with solid state overload protection • Control transformer • Disconnect switch • Distribution terminal strip Premium grade control components are selected for reliable operation. All electrical components are UL Listed, recognized, or classified, and factory prewired for single point power connection. Module 2, Option 2 DGX shown with optional birdscreen weatherhood, V-bank filter section and horizontal fan discharge. Direct Gas- Fired Heat Module 4, Option 1 Module 5, Option 2 Vibration Isolators The entire fan and motor assembly is mounted on neoprene vibration isolators to minimize noise transmission into the building. Spring vibration isolators are available in lieu of neoprene isolators. Reliable Fan Performance Air performance ratings from Greenheck’s accredited test chamber ensure accurate data. Double width, double inlet forward curved wheels for high efficiency and low sound levels are constructed of heavy gauge steel. Wheels are balanced to ensure vibration free operation. Access Panels Large access panels are provided for easy inspection and maintenance of motors, drives, fan wheels, filters, and heater controls. Factory Wired and Tested All units are tested prior to shipment to ensure proper operation of the gas train, electrical components, and airflow controls. MODULE SELECTION OPTIONS MODULE SELECTION OPTIONS Module 1 INTAKE Module 2 FILTER Module 3 COOLING Module 4 HEATING Module 5 DISCHARGE Option 1None requires Module 2, Option 2 None None Direct Gas Furnace 100% Outdoor Air Downblast Discharge Option 2 Birdscreen Weatherhood requires Module 2, Option 2 V-Bank Filters Pleated or Aluminum Mesh *Cooling Coil – CW, DX (standard capacity) Direct Gas Furnace Recirculation - requires Module 2, Option 3 Horizontal Discharge Option 3 Filtered Weatherhood 80/20 Filtered Recirculation *Cooling Coil – CW, DX (high capacity) Direct Gas Furnace Variable Air Volume Upblast Discharge Option 4 Louvered Weatherhood *Chilled water or direct expansion (DX) cooling is available with the model DGX. The cooling section includes the cooling coil, sloped stainless steel drain pan and insulated double wall construction. Drain and coil connections are stubbed through the wall for convenience. For proper coil sizing, use Greenheck CAPS selection software or contact your local representative. Four row and six row chilled water or DX coils are available with airflow capacity up to 11,000 cfm. Cooling coil sections are installed upstream of the fan section for a draw through arrangement and provide a streamlined transition to adjacent DGX sections. DX coils require remote condensing units. • Module 2 is not available with the Evaporative Cooler section (Module 1, Option 6) • Cooling Coil modules (Module 3, Option 2 & 3) are not available with Recirculation (Module 2, Option 3) • Optional intake dampers available on Cooling Coil section (Module 3, Option 2 & 3) • Module 1, Option 3, 4 & 5 are not available on Housing 35 and larger The evaporative cooling section includes a galvanized steel housing with a louvered intake, 2 inch aluminum mesh filters and a stainless steel evaporative cooling module. The evaporative cooling media has a depth of 12 inches for 90% cooling effectiveness. The entire section mounts directly to the front of the DGX unit, eliminating transition or ductwork by others. Drain and overflow are conveniently tapped through the side of the cooling section. The supply line connection is field located where convenient. Freeze protection, automatic drain & fill, and water economizer (Water Wizard) options are also available. Airflow capacity for evaporative cooling is up to 46,000 cfm. The evaporative cooling section for the housing 32 and larger ship separately. Option 5 Thru-Wall Option 6 Evaporative Cooling VARIABLE MAKE-UP AIR OPTIONS Variable VolumeVariable Volume Variable VolumeVariable Volume The variable volume option is recommended when a building’s exhaust volume will vary. The make-up air volume will track with the exhaust volume, providing only the necessary amount of make-up air. The variable volume option saves energy by reducing both fan power and gas consumption whene...