Greenheck IG Installation Manual

Indirect Gas-Fired Make-Up Air

Model IG

• 800 to 7,000 cfm • Up to 400,000 BTU/hr

May

2004

Multiple Furnace Control Options

Optional Evaporative Cooling

PRODUCT FEATURES

2

The Greenheck model IG features a
power vented, 80% efficient, ETL
listed, indirect gas-fired furnace.
Heating is available up to 400,000
BTU/hr (input) with air flow volumes
up to 7,000 cfm.

Units are factory assembled and
wired to minimize field installation
time and costs.

Indirect Gas-Fired Furnaces

• Power vented with post purge cycle

• ETL listed to ANSI standard Z83.8 and CGA 2.6

• 80% thermal efficiency

• Gas control options include up to 8:1 staged
turndown and up to 4:1 modulating turndown

• Aluminized steel or stainless steel heat exchanger

• Direct spark ignition system

• Easy access burner controls

• Insulated double wall construction

Control Center

The control center includes the following standard
components:

• Magnetic motor starter

with solid state overload
protection

• Control transformer with

fusing

• Disconnect switch

• Separately fused motor

• Distribution terminal strip

Premium grade control components are selected to
provide you with years of reliable operation. All
electrical components are UL Listed, recognized or
classified and factory prewired for single point power

connection.

Vibration Isolators

The entire fan and motor
assembly is mounted on
Neoprene vibration
isolators to minimize noise
transmission into the
building.

Filters

Filter options include 2-inch pleated 30% efficient
filters or 2-inch washable aluminum mesh filters.

Integrated Downturn Plenum

Greenheck’s unique indirect furnace design includes
an integrated downturned plenum, eliminating the
need for an additional section to achieve a downblast
discharge.

Durable Construction

Designed for maximum weather resistance, IG
housings are constructed of heavy gauge G90
galvanized steel. Insulated double wall construction
and lifting lugs are standard.

Reliable Fan Performance

Air performance ratings
from Greenheck’s
AMCA registered test
chamber ensure

accurate data.

Double width, double
inlet forward curved
wheels for high
efficiency and low
sound levels are constructed of heavy gauge steel.
Wheels are statically and dynamically 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 Greenheck’s
high level of quality. Units are
checked for proper fan, furnace
and controls operation.

Model IG

Indirect Gas-Fired
Make-Up Air Unit

®

INSTALLATION OPTIONS

3

®

Kitchen Combination Package

Downblast or Horizontal Discharge

Model IG is available in either downblast
(Arrangement DB) or horizontal (Arrangement HZ)
discharge. Arrangement DB utilizes Greenheck’s
integrated downturned plenum to provide you with
the most compact downturn design available.

Venting Options

When your application calls for indoor installation, Greenheck offers multiple venting options:

Basic Indoor Venting Separate 2-Pipe Venting Concentric Venting

The Greenheck combination
package (Arrangement DBC)
simplifies installation and
reduces your field labor costs.
This pre-engineered design
offers you the benefit of only
one roof penetration for both
supply and exhaust ducts, while
ensuring complete compatibility
and interface between the
supply fan, exhaust fan, curb
and combination extension.

Greenheck combination packages are specifically designed to comply with NFPA 96, which states:

• Exhaust duct must terminate at least 24 in. above the roof deck.

• Exhaust fan discharge must terminate at least 40 in. above the roof deck.

• There must be at least 10 ft. of horizontal separation between the intake and exhaust discharge.

Through WallThrough WallThrough Wall

Through Roof Through Roof Through Roof

Concentric venting uses
outdoor air for combustion
and vents combustion
byproducts outdoors through
a vent line, but offers you the
benefit of only one roof or wall
penetration.

Separate 2-pipe venting uses
outdoor combustion air and
vents combustion byproducts
outdoors through a vent line,
requiring separate roof or wall
openings for each line.

Basic indoor venting uses
indoor air for combustion and
vents combustion byproducts
outdoors through a vent line
in the wall or roof.