Horizontal Furnace Attic Installation; Construct A Working Platform; Install Furnace; Horizontal Furnace/Crawlspace Installation - Bryant 333JAV Installation, Start-Up, And Operating Instructions Manual

2. Connect gas supply pipe.
3. Connect supply- and return-air ducts.
II. HORIZONTAL FURNACE ATTIC INSTALLATION
WARNING: 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.
A. Construct a Working Platform
Construct working platform on location where all required furnace
clearances are met. (See Fig. 3 and 10.)
B. 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.
III. 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.
IV. 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.
Fig. 12—Horizontal Furnace Installation on Blocks
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.
V. GAS PIPING
CAUTION: 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.
The gas supply line should be a separate line running directly from
gas meter to furnace, if possible. Refer to Table 4 for recom-
mended gas pipe size. Risers must be used to connect furnace to
gas meter.
WARNING: If a flexible connector is required or al-
lowed by the authority having jurisdiction, black iron
pipe shall be installed at the furnace gas control valve and
extend a minimum of 2 in. outside the furnace casing. A
failure to follow this warning could result in fire, personal
injury, or death.
WARNING: Use the proper length of pipes to avoid
stress on the gas control manifold. A failure to follow this
warning can cause a gas leak resulting in a fire, explosion,
personal injury, or death.
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CAUTION: Use a backup wrench at the furnace gas
control when connecting the gas pipe to the furnace to
avoid damaging gas controls or manifold.
—9—
"
5 ⁄
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5
⁄
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3
1 ⁄
4
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3
1 ⁄
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"
5
⁄
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5
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Fig. 13—Leveling Leg Installation
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