Modular Make-Up Air Unit Model DGX • Direct Gas-Fired Heating • Evaporative • Chilled Water • DX Cooling March 2007
PRODUCT FEATURES Model DGX Module 1, Option 2 Module 2, Option 2 Module 4, Option 1 Direct Gas-Fired Make-Up Air Unit Module 5, Option 2 The Greenheck model DGX is a 100% efficient direct gasfired heating and ventilating unit. 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.
MODULE SELECTION OPTIONS None requires Module 2, Option 2 Module 2 FILTER Module 3 COOLING None None Module 4 HEATING Module 5 DISCHARGE Direct Gas Furnace 100% Outdoor Air Downblast Discharge Option 2 Option 1 Module 1 INTAKE V-Bank Filters Pleated or Aluminum Mesh *Cooling Coil – CW, DX (standard capacity) Direct Gas Furnace Recirculation - requires Module 2, Option 3 Horizontal Discharge Filtered Weatherhood 80/20 Filtered Recirculation *Cooling Coil – CW, DX (high capacity) Direct Ga
VARIABLE MAKE-UP AIR OPTIONS Variable 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 whenever makeup air requirements are less than the maximum. Airflow Control Strategies Greenheck offers four methods of controlling the make-up air volume.
INSTALLATION OPTIONS Roof Mounted Installation Model DGX is available for stand alone installations as shown below. Downblast (Arrangement DB), upblast (Arrangement UB), or horizontal (Arrangement HZ) discharge may be specified. Upblast Discharge - Arrangement UB Horizontal Discharge - Arrangement HZ The Greenheck combination package simplifies installation and reduces field labor costs.
ACCESSORIES Remote Control Panels A wide variety of remote control panels are available. Specify the desired combination of switches, thermostats, temperature selectors and indicator lights. A terminal strip at the unit control center and remote panel simplify field control wiring. Basic remote control panel with thermostat for room temperature control option. Kitchen style remote panels feature toggle switches and a stainless steel face plate for flush mounting to a wall.
AIR PERFORMANCE Blower Size CFM 800 108 Housing 12 1,200 1,500 109 2,400 2,000 110 3,000 Housing 22 2,600 112 4,400 4,000 115 6,500 Housing 32 6,500 118 9,500 10,000 120 15,000 Housing 35 15,000 122 19,000 19,000 125 23,000 Housing 38 24,000 127 30,000 26,000 130 34,000 Housing 42 32,000 133 40,000 42,000 136 48,000 RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM
Typical Specifications General: Make-up air unit shall be as manufactured by Greenheck or approved equal provided all specifications are met. Greenheck Model DGX equipment is used as the basis of design. Performance to be as scheduled on plans. Make-up air unit shall be ETL listed to ANSI Z83.4 -1999, CSA 3.7 - M99 (for 100% outdoor air) or ANSI Z83.18-2000 (for recirculation). Gas Train and Controls: Direct gas-fired system shall have a draw through design and field adjustable burner baffles.