Model Number Code; Listings; Additional Ioms For Reference - Greenheck IGX Series Installation, Operation And Maintenance Manual

The model number code provides basic identification of the unit. The serial number can be used by the
manufacturer's representative or the factory to identify the specific unit configuration. The serial number
of the unit must be provided when consulting the manufacturer's representative or the factory.
Model Parent
IGX
Optional Fan
*P - Plenum Supply Fan

Listings

Units are listed for installation in the United States
and Canada.
• Installation of gas-fired duct furnaces must conform
with local building codes. In the absence of local
codes, installation must conform to the National
Fuel Gas code, ANSI Z223.1 or in Canada, CAN/
CGA-B149 installation codes.
• All electrical wiring must be in accordance with the
regulation of the National Electrical Code, ANSI/
NFPA 70.
• Unit is approved for installation downstream from
refrigeration units. In these conditions, condensate
could form in the duct furnace and provision must be
made to dispose of the condensate.
4 Model IGX Make-Up Air
General

Model Number Code

Model Number Code
IGX - P1 20 - H22 - MF - C
Blower Quantity
1
A (50 mbh) F (175 mbh)
B (75 mbh) G (200 mbh)
C (100 mbh) H (225 mbh)
D (125 mbh) I (250 mbh)
E (150 mbh) J (300 mbh)
*If no P is shown, then a forward-curved fan is provided.
Furnace Input
See List Below
Mixed Flow
Housing Size
12-32
Wheel Diameter (in.)
8 - 20
K (325 mbh) P (700 mbh)
L (350 mbh) Q (800 mbh)
M (400 mbh) R (1,000 mbh)
N (500 mbh) S (1,050 mbh)
O (600 mbh) T (1,200 mbh)

Additional IOMs for Reference

For complete furnace information reference the Indirect
Gas-Fired Heat Modules IOM. Available turndown
control options include:
4:1- uses modulating valve and furnace
controller
Single Furnace
*High turndown uses a 4:1 modulating
Unit
valve with a proprietary manifold and
furnace controller
8:1- uses one 4:1 modulating furnace with
furnace controller and one 2-stage furnace
4:1 - uses two 4:1 modulating furnaces
controlled in parallel
Two Furnace
*High turndown furnaces in a series
Unit
configuration use one high turndown
furnace and one 2-stage furnace
*High turndown furnaces in a parallel
configuration use two high turndown
furnaces, controlled in parallel
12:1 - uses one 4:1 modulating furnace,
one 2 stage furnace and one 1-stage
furnace
Three Furnace
Unit
*High turndown uses one high turndown
furnace, one 2-stage furnace, and one
1-stage furnace
* High turndown furnace patent pending
Single Furnace
8 stage
Unit
Electronic Modulation
.
Staged
®