Greenheck Fan Modular Make-Up Air Unit DGX User's Manual
Contents
1. Any units or parts which prove defective during the warranty period will be replaced at our option when returned to our factory transportation prepaid Motors are warranted by the motor manufacturer for a period of one year Should motors furnished by Greenheck prove defective during this period they should be returned to the nearest authorized motor service control transformer for 24 VAC circuit integral disconnect switch and terminal strip Contactors Class 20 adjustable overload protection and single phase protection shall be standard Filter Section Filter section shall be designed such that velocities across the filters do not exceed 550 feet per minute Filters shall be 2 inch washable aluminum mesh or 2 inch disposable Weatherhood Weatherhood shall be constructed of G90 galvanized steel with birdscreen mounted at the intake Recirculation optional Recirculation airflow shall be controlled by adjustment of return damper position Input signal for return damper shall be from building pressure sensors potentiometer external signal or manual switch Recirculated air shall not be permitted to pass across the burner Return air shall be filtered Variable Volume optional Volume shall be varied by either a 2 speed motor or variable frequency drive Input signal for fan speed shall be from building pressure sensors potentiometer external signal or manual switch A self adjusting burner bypass damper shall maintain2. a constant air volume across the burner to ensure proper gas combustion Bypass damper shall operate automatically without an electronic signal Cooling Coil optional Direct expansion DX or chilled water coil shall be factory tested and rated in accordance with ARI 410 Coils shall have copper tubes with permanently expanded aluminum fins 12 fpi or less DX coils shall be equipped with distributors to receive expansion valves at the liquid connections Drain pans shall extend at least 12 inches downstream of coil and be sloped to drain connection Cooling coil shall meet UL 1995 specifications for non protected coil Evaporative Cooling Section optional Evaporative cooling section shall include a galvanized steel housing with louvered intake 2 inch aluminum mesh filters and a stainless steel evaporative cooling module all provided by the make up air unit manufacturer The louver shall be stationary type with drainable blades and be designed to withstand wind loads of 25 PSF Evaporative cooling media shall be 12 inches deep with a UL 900 class II fire rating for a cooling effectiveness of 90 Drain and overflow connections shall be piped through the side of the evaporative cooling section station Greenheck will not be responsible for any removal or installation costs As a result of our commitment to continuous improvement Greenheck reserves the right to change specifications without notice Greenheck P O Box 410 Schofi
3. inlet air sensor will automatically turn the heat on and off based on the outdoor air temperature Discharge Diffuser Discharge diffusers are available as either 3 way for horizontal discharge or 4 way for downblast discharge Service Receptacle A 115 volt GFCI outlet is mounted externally in a NEMA 3R box for the convenience of service personnel A separate 115 volt power source is required Auxiliary Contacts Normally open and normally closed contacts are available for supply fan status and supply fan interlocks AIR PERFORMANCE I GREENHECK Building Value in Air Temer om lt TOTAL PRESSURE in inches wa Size 0 75 1 00 1 25 1 50 1 75 2 00 so BPM 0 uo pae EE 108 BHP 026 031 035 040 1 200 RPM 1347 1445 1530 BHP 059 068 075 4500 RPM 1014 1140 1255 1361 1460 109 BHP 045 054 063 073 0 84 RPM 1216 1306 1397 1484 1648 Se Se Se ee as 2000 RPM 912 103 1110 1199 110 BHP 059 O71 0 08 010 1315 1386 1455 3000 RPM 1097 1172 1244 1315 BHP 9600 RPM 761 853 934 1009 2 Bas n O kt y a 2 1 112 BHP 07 09 10 12 4400 RPM 939 1006 1073 1137 1197 1254 3 1 4000 RPM 681 756 822 892 115 1062 5 1 1110 5 9 e BHP 21 25 28 9500 RPM 736 7e 87 a4 954 5 4 10000 RPM soo 634 678 723 ve
4. Discharge dampers ship loose for field mounting in the supply air duct Fiberglass Insulation One inch fiberglass insulation is available to line the housing to prevent the formation of condensation and to form an acoustical barrier Double Wall Construction An interior metal liner is available to isolate the 1 inch fiberglass insulation from the airstream Kitchen style remote panels feature toggle switches and a stainless steel face plate for flush mounting to a wall The junction box is also included Spring Vibration Isolation Spring blower vibration isolators are available in lieu of neoprene isolators Exhaust Fan Starter s Exhaust fan starters are available factory mounted and wired Exhaust fan starters allow for an electrical interlock between the supply and exhaust fan s Dirty Filter Switch A dirty filter switch is available to monitor the pressure drop across the filter section If the pressure drop across the filters is higher than the field adjustable setting the dirty filter switch trips indicating the need to clean or replace the filters Freeze Protection Electronic freeze protection is available to automatically shut down the supply fan when the discharge temperature is below the adjustable set point for an extended amount of time This prevents the unit from discharging non tempered air into the building and freezing pipes and other temperature sensitive items Inlet Air Sensor Heat The heating
5. Modular Make Up Air Unit Model DGX e Direct Gas Fired Heating e Evaporative Chilled Water e DX Cooling H GREENHECK Building Value in Air PRODUCT FEATURES H GREENHECK Building Value in Air Module 1 Option 2 Model DGX Direct Gas Fired Make Up Air Unit The Greenheck model DGX is a 100 efficient direct gas fired 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 Airflow volumes oe range from 800 to 48 000 cfm Direct Gas i on Fired Heat 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 e High quality cast aluminum burners with stainless steel mixing plates e Maxitrol electronic modulation burner control e Flame safeguard with digital fault indicator capability over 400 000 Btu hr e 25 1 turn down ratio Control Center The control center includes the following standard components e 24 volt control voltage e Magnetic motor starter with solid state overload protection e Control transformer e Disconnect switch e Distribution terminal strip Premium grade control components are selected fo
6. NFPA 96 NFPA 96 states e Exhaust duct must terminate at least 24 inches above the roof deck The combination curb extension e Fan discharge must be at least 40 inches E AA eee oe above the roof deck providing a factory engineered e Air intake shall have a horizontal separation interface between the roof curb of 10 feet from the exhaust discharge and the fans It is also designed Note Consult local codes and the authority to satisfy NFPA 96 requirements having jurisdiction if there are questions See ee oer tae kitchen hood exhaust concerning the use of this product Thru Wall Installation Model DGX Housing 12 22 amp 32 only is available with a pre engineered thru wall installation option which is ideal when a roof penetration is not desirable Factory options that facilitate easy installation and ensure problem free operation Weatherhood A full down turn design with generous intake area to minimize intake velocity and moisture entrainment Thru Wall Sleeve Sleeve provides attachment interface between weatherhood and burner section Accommodates walls up to 15 inches in depth Filter Section Aluminum mesh media filters outdoor air and strips fine mist from the air A drain pan weeps moisture out the front of the wall sleeve H GREENHECK Building Value in Air ACCESSORIES Remote Control Panels A wide variety of remote contr
7. eld WI 54476 0410 Phone 715 359 6171 greenheck com Copyright 2007 Greenheck Fan Corp Catalog DGX Rev 4 March 2007 SP
8. enheck 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 Gas trains up to 400 000 Btu hr shall include a direct spark ignition system Gas trains greater than 400 000 Btu hr shall include a pilot ignition system and shall have digital coded fault indicator capability Fault indicator shall provide service history by storing codes for the last five faults Dual safety shutoff valves shall be industrial duty and use 120 VAC control signals Temperature control shall incorporate a Maxitrol electronic modulation control system Unit Casing and Frames Unit shall be of internal frame type construction of galvanized steel All frames and panels shall be G90 galvanized steel Where top panels are joined there shall be a standing seam to insure positive weather protection All metal to metal surfaces exposed to the weather shall be sealed requiring no caulking at job site All components shall be easily accessible through removable doors Insulation Unit casing to be lined with 1 inch fiberglass insulation where specified Insulation shall be in accordance with NFPA 90A and tested to meet UL 181 e
9. ered 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 amp fill and water economizer Water Wizard options are also available Evaporative Airflow capacity for evaporative cooling is up to 46 000 cfm The evaporative cooling section for the Cooling housing 32 and larger ship separately AIGREENHECK VARIABLE MAKE UP AIR OPTIONS Building Value in Air Variable Volume The variable volume option is recommended when a e 2 speed motor controlled manually with a remote building s exhaust volume will vary The make up air switch volume will track with the exhaust volume providing Burner By Pass Damper only the necessary amount of make up air The Variable Volume option includes a patented The variable volume option saves energy by reducing burner by pass damper which maintains the pressure both fan power and gas consumption whenever make drop across the burner as air volumes change This up air requirements are less than the maximum assures that complete and proper combustion occurs Airflow Control Strategies The by pas
10. ol 2 Space Control and 3 DDC Interface Control Cooling controls are by others Room Control Specify this option when the DGX has the primary responsibility for controlling the room temperature A manually adjusted room thermostat provides feedback to the unit controls which vary the discharge temperature in order to maintain desired room set point DDC Interface Control Allows for an external signal 0 10 VDC or 4 20 mA from the building management system to modulate the burner output to satisfy monitored conditions Discharge Control A factory installed modulating system controls the gas valve to provide the desired temperature based on a sensor at the fan discharge A room override option is available to boost the discharge temperature when the space is too cool INSTALLATION OPTIONS E GREENHECK Building Value in Air 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 The Greenheck combination package simplifies installation and reduces field labor costs The pre engineered design ensures that the supply fan exhaust fan curb and combination extension components interface properly for kitchen ventilation applications Equally important Greenheck combination packages are specifically designed to comply with
11. ol 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 Accessories Special Coatings Greenheck s Permatector coating is available for a durable long lasting finish Decorative paints are also available in a variety of colors to match existing building fixtures Consult your Greenheck representative for paint selections Roof Curbs Factory provided roof curbs are available to ensure compatibility between the make up air unit and roof curb Standard construction is G90 galvanized steel Duct Adapter Duct adapter is available with factory supplied roof curbs The duct adapter allows for easy alignment of the supply duct connection V Bank Filter Section V bank filter sections are available with 2 inch washable aluminum mesh or 2 inch 30 efficient disposable filters Weatherhood Three weatherhoods are available standard weatherhood includes birdscreen filtered weatherhood includes aluminum mesh filters and louvered intake hood includes a drainable blade louver at intake with 2 inch aluminum mesh filters Motorized Dampers Intake or discharge dampers are available to prevent backdrafts when the supply fan is not in operation Intake dampers are factory mounted and wired
12. r reliable operation All electrical components are UL Listed recognized or classified and factory prewired for single point power connection Module 2 Option 2 Module 4 Option 1 Module 5 Option 2 DGX shown with optional birdscreen weatherhood V bank filter section and horizontal fan discharge 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 F 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 E GREENHECK Building Value in Air Module 1 Module 2 Module 3 Module 4 Module 5 INTAKE FILTER COOLING HEATING DISCHARGE None requires Module 2 Option 2 Direct Gas Furnace Downblast 100 Outdoor Air Discharge Birdscreen Weatherhood V Bank Filte
13. rosion requirements Double wall shall be provided where specified Fan Section Centrifugal fans shall be double width double inlet Fan and motor shall be mounted on a common base and shall be internally isolated All blower wheels shall be balanced Ground and polished steel fan shafts shall be mounted in permanently lubricated ball bearings or ball bearing pillow blocks Bearings shall be selected for a minimum L10 life in excess of 100 000 hours at maximum cataloged speeds Motors and Drives Motors shall be energy efficient complying with EPACT standards for single speed ODP and TE enclosures Motors shall be permanently lubricated heavy duty type matched to the fan load and furnished at the specified voltage phase and enclosure Drives shall be sized for a minimum of 150 of driven horsepower Pulleys shall be cast and have machined surfaces 15 horse power and less shall be supplied with an adjustable drive pulley Electrical All internal electrical components shall be prewired for single point power connection with exception of the larger evaporative cooling sections All electrical components shall be UL listed recognized or classified where applicable and wired in compliance with the National Electrical Code Control center shall include motor starter control circuit fusing Our Warranty Greenheck warrants this equipment to be free from defects in material and workmanship for a period of one year from the purchase date
14. rs Cooling Coil CW DX Direct Gas Furnace Horizontal requires Pleated or standard capacity Recirculation requires Discharge Module 2 Option 2 Aluminum Mesh Module 2 Option 3 Filtered p 80 20 Filtered Cooling Coil CW DX Direct Gas Furnace Upblast Weatherhood Recirculation high capacity Variable Air Volume Discharge 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 Louvered Four row and six row chilled water or DX coils are available with airflow capacity up to 11 000 cfm Weatherhood 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 e Module 2 is not available with the Evaporative Cooler section Module 1 Option 6 e Cooling Coil modules Module 3 Option 2 amp 3 are not available with Recirculation Module 2 Option 3 e Optional intake dampers available on Cooling Coil section Module 3 Option 2 amp 3 e Module 1 Option 3 4 amp 5 are not available on Housing 35 and larger The evaporative cooling section includes a galvanized steel housing with a louv
15. s 03 os BHP 40 45 5 i5000 C RPM 763 79 829 86 0 C Behe m09 ne 123 13 1 15000 RPM 6o 6s 667 68 BHP 83 89 19000 RPM 720 746 7n 79 17 8 19000 C RPM 56s 59 62 6s5 i ooo BHP o8 107 n7 128 892 13 8 127 11 1 821 18 6 683 13 8 921 14 5 155 h ol on 00 wN N O1 O m y m y m m 845 111 14 8 33000 RPM 643 67n 967 723 19 2 24o00 RPM asi ars soa sso 55 578 oe BHP ne 130 143 158 172 186 30 000 RPM 52 s548 s7 s93 eee BHP 196 214 232 26000 RPM a2 m 0 eee Bee f 125 139 16 8 18 3 z4o0o0 RPM a 4 am 499 s9 54 eee BHP as 231 32000 RPM s s97 42 a67 488 ia BHP 210 226 243 40000 RPM 426 448 aro an 512 s3 33 7 35 8 379 42 000 RPM 405 425 445 a 341 363 385 43 000 RPM 447 46s 483 500 N N N 3 OO 2 I P 18 N ee Oy O NI oy og N Go N gt T o SS Fe N O Housing42 Housing38 Housing35 Housing32 Housing22 BHP 390 41 5 440 Note The air performance data shown does not include internal static pressure losses due to items such as filters dampers and coils For exact air performance data based on specific unit configuration use the Greenheck CAPS selection program GREENHECK Building Value in Air Typical Specifications General Make up air unit shall be as manufactured by Gre
16. s damper is self adjusting designed for Greenheck offers four methods of controlling the PIM Sh naInten alee ana ieguis no contol make up air volume All four vary the fan speed for maximum energy savings e Variable Frequency Drive controlled by building pressure e Variable Frequency Drive controlled manually with a gt N remote potentiometer Outside Air e Variable frequency drive controlled by a 2 10 VDC or 4 20 mA signal supply Air Recirculation The recirculation option is recommended when the e Modulating actuator controlled manually with a ventilation equipment provides the primary source of remote potentiometer heating for the space e Modulating actuator controlled by a 2 10 VDC or Up to 80 of the air from the space can be 4 20 mA signal recirculated and filtered and then combined with a e Two position actuator controlled manually with a minimum of 20 outdoor air for a continuous source remote switch time clock of fresh air Only outdoor air is used for combustion to eliminate the possibility of contaminants from the recirculated air crossing over the burner Airflow Control Strategies Greenheck offers four methods of controlling the ratio of recirculated air to outdoor air via motorized Outside Air dampers 100 20 e Modulating actuator controlled by building pressure Recirculated Air Supply Air 0 80 Temperature Control There are three temperature control options for heat 1 Discharge Contr
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