Figure 2
c
Dimensions and Clearances (NDN6/GDE)
I A K" I
MINIMUM CLEARANCES TO
COMBUSTIBLE
MATERIALS FOR ALL UNITS
REAR 0
FRONT 3" (75mm)
For Service 30" (760mm)
ALL SIDES Of SUPPLY PLENUM 1" (25mm)
SIDES 0
VENT
Single Wall Vent 6" (150mm)
Type B-1 Double Wall Vent 1" (25mm)
TOP OF FURNACE 6" (150mm)
©
30" MIN.
252045
ALL DIMENSIONS IN INCHES (mm)
DIMENSIONAL INFORMATION
MODEL
NDN6050/075FB
GDE050/075B
NDN6075HF & NDN6100GF/KF
GDE075F/100F
NDN6125KJ/GDE125J
CABINET
BOTTOM RETURN
OPENING
F G
14 1817/32
A B C
t516 2816 40
t91_ 2816 40
223_ 2816 40
OPENING
D E
14 151/2
179/16 151/2
213/16 151/2
179/16 1817/32
213/16 1817/32
GAS CONNECTIONS
H J K
913/16 21/2 411/16
913/16 21/2 411/16
913/16 21/2 411/16
mm Equivalents 15112=394 19118=486 223/4=578 28112=724 40 = 1016 14=356 t79/16 =446 179/16=446 213/16=538
1817132=47t 913/16= 249 21/2= 64 411/16= 119
Installation Requirements
1. Install furnace level.
7. Residential garage installations require:
• Burners and ignition sources installed at least 18" (457mm)
above the floor.
2.
This furnace is NOT to be used for temporary heat of build-
ings or structures under construction.
Install the vent pipes as short as practical. (See Gas Vent
Installation section).
Do NOT install furnace directly on carpeting, tile or other
combustible material other than wood flooring.
Maintain clearance for fire safety and servicing. A front clear-
ance of 30" (760mm) is minimum for access to the burner,
controls and filter.
Use a raised base if the floor is damp or wet at times.
• Furnace must be located or physically protected from pos-
sible damage by a vehicle.
HorizontalFurnaceInstallation
IMPORTANT
NOTE: Inspect unit rating plate to be certain model number be-
gins with "NTC6", "GNE, "NTN6" or "NNE". This identifies unit
as horizontally mountable. If unit does NOT bear this designation,
you may NOT mount this unit horizontally. Horizontal furnace
may not be mounted on its back.
If you purchased a horizontally mountable furnace, it can be
installed horizontally in an attic, basement, crawl space, alcove,
or suspended from a ceiling in a basement or utility room in either
a right or left airflow position. See Figure 3.
44t 01230801
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