Greenheck Modular Make-Up Air Unit DGX User Manual

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 NFPA 96.
NFPA 96 states:
• Exhaust duct must terminate at least 24
inches above the roof deck
• Fan discharge must be at least 40 inches
above the roof deck
• Air intake shall have a horizontal separation
of 10 feet from the exhaust discharge
Note: Consult local codes and the authority
having jurisdiction if there are questions
concerning the use of this product.
Model DGX (Housing 12, 22, & 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.
Roof Mounted Installation
Roof Mounted Installation
Thru-Wall Installation
Thru-Wall Installation
INSTALLATION OPTIONS
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.
Horizontal Discharge - Arrangement HZ
Combination Package - Arrangement DBC
The combination curb extension
is the component that pulls the
Combination Package together,
providing a factory engineered
interface between the roof curb
and the fans. It is also designed
to satisfy NFPA 96 requirements
- above the roof line - for
kitchen hood exhaust.
5

Greenheck Modular Make-Up Air Unit DGX Specifications

Gas Train and Controls

maximum gas train capacity	400, 000 Btu/hr
gas train ignition system	direct spark ignition
safety shutoff valve control signal	120 VAC

Fan Specifications

fan type	centrifugal
fan inlet type	double width, double inlet
fan bearing life	100, 000 hours

Cooling Coil

coil type	direct expansion or chilled water
coil fin density	12 fpi or less
drain pan extension	12 inches

Evaporative Cooling Section

evaporative cooling media depth	12 inches
evaporative cooling media fire rating	UL 900 class II
wind load resistance	25 PSF