STANDARD CONSTRUCTION
DFG direct fired gas make-up air units are available in four housing
sizes incorporating eight blower sizes (9” through 20” single
blower units 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 housing and five curb/mounting
arrangements with three discharge orientations. Construction features
include:
- HOUSING
- Heavy gauge weatherproof galvanized steel housing
- 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
- ODP motor (three phase 1HP and larger are EPACT high efficiency
rated)
- Blower and motor mounted on vibration isolators
- Down discharge
- 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 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
Construction/submittal drawings and performance data are available in PDF format, with some drawings in standard (read only) and form (text boxes) format. You will need Acrobat Reader to view and print standard format or Adobe Acrobat to utilize text boxes. Acrobat Reader is available at no charge from the Adobe Website. You will be able to follow the links below to open and view. Use the back arrow to return to this page.
Available Submittal Drawings:
OPTIONS AND ACCESSORIES
- 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
- Floor spring isolators
- Hanger spring isolators
- Vertical unit
- Equipment stand for vertical unit
- Dx cooling coil module
- Chilled water coil module
- Evaporative cooling module
- FILTER SECTION
- 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 (freezestat)
- 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.
PERFORMANCE DATA
Model DFG
