6
Table 4. Minimum Clearances
Figure 5. Non-Platinum
Supply Duct System
A Single trunk duct
B
Dual trunk duct
w/crossover connector
C
Transition duct
w/branches
c. American National Standard (ANSI-Z223.1/
NFPA-54) and/or CAN/CSA B149 for all gas-
fi red furnace models.
d. American National Standard (ANSI-Z95.1/
NFPA-31) and/or CSA B139 for all oil-fi red
furnace models.
e. American National Standard (ANSI-C1/NFPA-
70) and/or CSA 22.1 Canadian Electric Code
Part 1 for all electrical fi eld wiring.
f. Units have been investigated under standards
UL 307A & B, UL727-1999, ANSI 21.47a
- CAN/2.3a - 1995, and CSA B140.10.
Ce générateur d’air chaud doit être installe
conformément aux instructions du fabricant et
aux codes locaux. En l’absence de code local,
respecter la norme ANSI Z223.1, institulé Na-
tional Fuel Gas Code ou les codes d’installation
CAN/CSA-B149.
5. UNIT LOCATION
The furnace shall be appropriately located to
the supply and return air distribution system.
(See “AIR DISTRIBUTION”, Page 8) Sides and
back of the furnace may be enclosed by wall
framing. (See “Minimum Clearances,” Table 4,
and Figures 2 through 5.)
The furnace installation is only intended for free
air return through the furnace door louvers. DO
NOT connect a ducted return air system directly
to the furnace. Improper installation may create
a hazard and damage equipment, as well as
void all warranties.
Furnace may be installed on combustible fl oor-
ing when using NORDYNE Duct Connectors
(see Section 10).
When installed in a residential garage, the fur-
nace must be positioned so the burners and the
source of the ignition are located no less than
18 inches above the fl oor and protected from
physical damage by vehicles.
6. MINIMUM CLEARANCES
This heating appliance must be installed with
clearances not less than the minimums shown
in Table 4. This heating appliance must be in-
stalled with ample clearance for easy access to
the air fi lter, blower assembly, burner assembly,
controls, and vent connections.
a. Alcove installations (see Figure 2): minimum
18” clearance at front of furnace shall be
provided for future servicing. A removable
access panel should be installed between top
of the furnace door frame and the ceiling.
b. Closet installations must use a louvered door
having a minimum free area of 235 sq. in.
when located 6” from furnace (See Figure 3)
or 390 sq. in. for 5 ton ready M1 furnaces. For
special clearance between 1” and 6”, require-
ments are a louvered door with a minimum of
250 sq. in. free area, with the openings in the
closet door in line with the louvered openings
in the furnace door . A fully louvered closet
door may be used (See Figure 4 and section
7.i. to evaluate compliance with this require-
ment).
7. RETURN AIR PROVISIONS
U.S.A. home manufacturers shall comply with all
of the following conditions to have acceptable
return air systems for closet installed forced air
heating appliances:
CAUTION:
HAZARD OF ASPHYXIATION: Nega-
tive pressure inside the closet, with
closet door closed and the furnace
blower operating on high speed, shall
be no more negative than minus 0.05
inch water column.
ALL MODELS
CLOSET
ALCOVE
Front
6”
18”
Back
0”
0”
Sides
0”
0”
Roof Jack
0”
0”
Top
6”
6”
Top and Sides of Duct
0”
0”
Bottom of Duct
B Cabinet
0”
0”
A Cabinet (w/ coil box)
0”
0”
A Cabinet (w/o coil box)
1/4”
1/4”
