MODEL DFG DIRECT FIRED GAS MAKE-UP AIR UNITS

DFG direct fired gas make-up air units are available in four housing sizes incorporating eight blower sizes (9" through 20" single blowers and 18" through 20" twin blower units) with air flow capacities from 1,000 to 30,000 CFM, heating capacities to 4,800,000 BTU input, and total static pressures up to 4" W.G.  The Model DFG is ETL listed in accordance with the stringent requirements of ANSI standards Z83.4, and is FM and IRI compliant.

These units are offered in a choice of three housings and five curb/mounting arrangements with three discharge orientations.
 

STANDARD CONSTRUCTION
STANDARD CONSTRUCTION
AVAILABLE MODELS
AVAILABLE MODELS
OPTIONS AND ACCESSORIES
OPTIONS AND ACCESSORIES

HOUSING

  • Heavy gauge weather proof galvanized steel housing
  • Down discharge
  • 1" thick 3# density fiberglass insulation
  • Large gasketed access panels with draw tight tooled fasteners
  • Heavy gauge base frame with lifting lugs
  • Intake hood with bird screen
  • V-bank filter rack
  • 1" permanent filters

BLOWER SECTION

  • Forward curved double width, double inlet blowers
  • Statically and dynamically balanced blower wheels
  • Precision machined shafts and sealed ball bearings
  • Adjustable motor mount and drives with belt selected for 165% of motor horsepower
  • NEMA frame ODP motor
  • Three phase 1 HP and above motors are EPACT high efficiency rated
  • Blower and motor mounted on vibration isolators

BURNER SECTION

  • Natural Gas
  • Adjustable profile plate
  • Observation window

CONTROLS & WIRING

  • UL recognized components
  • Wiring in accordance with NEC
  • Single point pre-wired motor control center with main fusible disconnect, starter(s) and fused transformer (located within the unit or remotely)
  • Maxitrol Series 14 discharge temperature control
  • High & low airflow switches
  • Burner control module
  • Flame rod
  • Spark rod
  • Ignition transformer
  • High temperature limit switch
  • Pilot solenoid valve
  • Main solenoid valve
  • Second solenoid valve
  • Modulating valve
  SUBMITTAL CATALOG SELECTION
GUIDE &
PERFORMANCE
DATA
SPECIFICATIONS
DFG PDF PDF PDF VIEW / WORD / PDF
DFG Vertical Flow PDF PDF PDF VIEW / WORD / PDF
DFG Roof Curb Arrangements PDF     VIEW / WORD / PDF
DFG Manifold Diagram PDF      
DFG Wiring Diagram PDF      
         
OTHER INFORMATION:        
DFG Installation and Maintenance Manual (PDF)
DFG Field Adjustment Videos
 

HOUSING

  • Flat filter section in intake hood
  • Delete intake hood
  • Foil faced insulation
  • Double wall insulation
  • Painted housing
  • Stainless steel housing
  • End discharge
  • Top discharge
  • Duct adaptor
  • Four way discharge head
  • Floor rubber in shear isolators
  • Hanger spring isolators
  • Vertical unit
  • Equipment stand for vertical unit
  • DX cooling coil module
  • Chilled water coil module
  • Evaporative cooling module

FILTERS

  • 2” permanent filters
  • 1” disposable filters
  • 2” disposable filters
  • 1” 30% filters
  • 2” 30% filters

MOTORS

  • TEFC
  • Premium Efficiency (three phase)

MOTORIZED DAMPER

  • Low leakage opposed blade damper
  • Two position spring return actuator
  • Intake or discharge mounting
  • End switch

CONTROLS

  • Fan service switch
  • Exhaust fan starter
  • Remote control panel
  • Remote control panel with indicator lights
  • Low temperature limit switch (freeze stat)
  • Mild weather thermostat (inlet air sensor)
  • Clogged filter switch with indicator light
  • Convenience outlet (service receptacle)
  • Time delay relay
  • Time clock (seven day)
  • Smoke detector
  • Room override thermostat
  • High/low gas pressure switch
  • High gas pressure regulator
  • Flame failure relay
  • UV flame detection in lieu of flame rod
  • N/O vent valve
  • FM manifold
  • Control system diagnostic indicator
  • Maxitrol Series 44 space temperature control
  • Maxitrol A200 DDC compatible control
  • Minnesota requirements

COOLING

  • Chilled water coil, ARI 400 tested, copper tubes with aluminum fins
  • DX coil, ARI 400 tested, copper tubes with aluminum fins
  • Evaporative cooling with microprocessor controls

HEATING

  • Propane in lieu of natural gas

Contact the factory for any other options or accessories not listed.


AVAILABLE FAN & MAKE-UP AIR UNITS: