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⁄
1
17
-IN. WIDE
2
CASINGS ONLY:
INSTALL FIELD-SUPPLIED
FILTER FILLER STRIP
UNDER FILTER.
3 "
"
1
24
/
2
1 "
FILTER
SUPPORT
Fig. 9—Bottom Filter Arrangement
Use care when cutting support rods in filters to protect against
flying and sharp rod ends. Wear safety glasses, gloves, and
appropriate protective clothing. Failure to follow this caution
could result in personal injury.
INSTALLATION
Step 1—Upflow Furnace Installation
NOTE: Door clip on control door may be removed for upflow
installations.
1. Position furnace in desired location.
2. Connect gas supply pipe.
3. Connect supply- and return-air ducts.
21-IN. WIDE
CASINGS ONLY:
SUPPORT RODS (3)
EXTEND 1/4" ON EACH
SIDE OF FILTER AND
REST ON CASING FLANGE
WASHABLE
FILTER
FILTER
RETAINER
A00290
Step 2—Horizontal Furnace Attic Installation
Do not install the furnace on its back; safety control operation
will be adversely affected. Never connect return-air ducts to
back, top, or bottom of the furnace (See Fig. 10 and 11.) A
failure to follow this warning could result in fire, personal
injury, or death. (See Fig. 4.)
The furnace can be installed horizontally with either the left-hand
(LH) or right-hand (RH) side down. A typical furnace attic
installation is shown in Fig. 10.
CONSTRUCT A WORKING PLATFORM
Construct working platform on location where all required furnace
clearances are met. (See Fig. 3 and 10.)
INSTALL FURNACE
1. Position furnace in desired location.
2. Connect gas supply pipe. See Fig. 10 for typical piping entry.
3. Connect supply- and return-air ducts.
4. Install 24 X 24-in. sheet metal shield on platform in front of
louvered control panel as shown in Fig. 10.
Step 3—Horizontal Furnace/Crawlspace Installation
The furnace can be installed horizontally with either the LH or RH
side up. In a crawlspace, furnace can either be hung from floor
joist (See Fig. 11.) or installed on suitable blocks or pad. (See Fig.
12.) The furnace can be suspended from each corner by hanger
bolts (4 each 3/8-in. all-thread rod) cut to desired length, 1 X
3/8-in. flat washer, 3/8-in. lockwasher, and 3/8-in. nut. Dimples
are provided for hole locations. (See Fig. 1.)
Since horizontal furnace crawlspace installation is very similar to
attic, refer to Horizontal Furnace Attic Installation section. The
installation of a sheet metal shield in front of the louvered control
panel is covered in Horizontal Furnace Attic Installation section.
For a crawlspace installation, this same sheet metal shield must be
installed above the louvered control panel. Extend sheet metal
shield over furnace top far enough to cover gas pipe entry hole.
Step 4—Leveling Legs (If Required For Upflow)
When furnace is used with side inlet(s) and leveling legs are
required, refer to Fig. 13 and install field-supplied, corrosion-
resistant 5/16-in. machine bolts and nuts.
NOTE: The length of the bolt should not exceed 1-1/2 in.
1. Lay furnace on its back. Locate and drill 5/16-in. diameter
hole in each bottom corner of furnace as shown in Fig. 13.
2. Install nut on bolt and install bolt with nut in hole. (Install flat
washer if desired.)
3. Install another nut on other side of furnace base. (Install flat
washer if desired.)
4. Adjust outside nut to provide desired height and tighten inside
nut to secure arrangement.
Step 5—Gas Piping
Emissions control devices located at the heat exchanger inlets
MUST be removed for propane installations (Refer to gas
conversion kit for instructions).
Gas piping must be installed in accordance with national and local
codes. Refer to the NFGC. Canadian installations must be installed
in accordance with NSCNGPIC and all authorities having juris-
diction.
8
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