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Power entrance for all models may be through the
right side or through the bottom of the unit (when
viewing the unit in a downfl ow position).
UNIT CHECKOUT
Before installing this furnace:
1. Inspect unit for possible shipping damage.
If shipping damage is found, fi le claim with
transportation company.
2. Record furnace model number and serial
number (see furnace data label) for future
reference.
3. Carefully read all instructions supplied with
optional equipment to be installed with
furnace.
CODES, SPECIFICATIONS, AND
REQUIREMENTS
Furnace Codes
Installation and wiring of this furnace, as well as
the design and construction of the home duct
system, must be in accordance with one or more
of the following codes:
• HUD MANUFACTURED HOME CONSTRUC-
TION AND SAFETY STANDARD (Title 24,
Part 3280)
• American National Standards (ANSI) A119.11,
C1-NFPA 7 (National Electrical Code)
• CANADIAN STANDARDS (C.S.A.) Z240.6.1,
and Z240.9.1.
All local codes having jurisdiction shall also
apply.
Air Duct Codes and Specifi cations
Air ducts must be installed in accordance with
National Fire Protection Association standards
NFPA 90A and NFPA 90B, these instructions,
and all applicable local codes.
• Materials: Air ducts must be aluminum,
tin plate, galvanized sheet steel, or other
approved materials for outlet or return air
ducts.
• Construction: Snap-Lock or Pittsburgh-Lock
seams are preferred. All other types of seams
must be made tight to prevent leakage.
• Sizing: Supply duct system must be designed
for proper air distribution. Static pressure
measured externally to furnace shall not ex-
ceed static pressure rating listed on furnace
nameplate.
• Location of Openings: Duct system must be
designed so that no supply registers are lo-
cated in duct system directly below furnace.
Table 1. Miscellaneous Listings & Installation Requirements
Listing agency(s)
May vary by model, check the unit data label for
applicable agency listing mark.
Approved Installation Confi gurations
Approved for: single/multistory residential or mobile/
modular/manufactured structures. Upfl ow, downfl ow,
(freestanding/closet/alcove)
Accessibility for Servicing Minimum of 18"(46cm) required in front of unit.
Minimum Clearance to
Combustibles
0" from all surfaces of furnace cabinet, ducts, optional
coil housing and plenum connector. No separate
subbase required for installations on combustible
fl ooring.
Minimum return air opening
required (total free area)
200 in (1290 cm ) heating only*
235 in (1516 cm ) A/C or H/P up to 4 ton installed
250 in (1613 cm ) A/C or H/P up to 4 ton w/1" clearanced
installed
390 in (2516 cm ) A/C or H/P up to 5 ton installed
*or return air grille and frame assembly p/n 902989 or
wall mount grille p/n 902999
Return air grille (closet or alcove
installation)
Use return air grille and frame assembly P/N 902989 or
equivalent for alcove installation.
Use wall mount return air grilled P/N 902999 or
equivalent for closet installation.
155 in (1000 cm ) must be added for 5 ton A/C or H/P
system.