The 2 factory-supplied filters are shipped in the blower compart-
ment. After return-air duct has been connected to furnace, install
filters in a V-formation inside return-air plenum. See Fig. 11 and
Table 4 for horizontal applications. Horizontal filter retainers must
be field supplied. See Fig. 12 for downflow applications.
IX.
GAS PIPING
Gas piping must be installed in accordance with national and local
codes. Refer to the current edition of the NFGC.
Canadian installations must be installed in accordance with NSC-
NGPIC and all authorities having jurisdiction.
Refer to Table 5 for recommended gas pipe sizing. Risers should
be used to connect to the furnace and the meter.
CAUTION:
If a flexible connector is required or al-
lowed by the authority having jurisdiction, black iron
pipe shall be installed at the gas valve and extend a
minimum of 2 in. outside the furnace casing.
WARNING:
Use the proper length of pipes to avoid
stress on the gas control manifold. Failure to follow this
warning can result in a gas leak, causing fire, explosion,
personal injury, or death.
Fig. 9—Horizontal Installation on Blocks
A95235
Fig. 10—Horizontal Crawlspace Installation on Hanger Rods
A96633
NOTES:
ANGLE
IRON OR
EQUIVALENT
ROD LOCATION
USING DIMPLE
LOCATORS
(SEE DIMENSIONAL
DWG FOR
LOCATIONS)
3
⁄
8
-IN. ROD
1. A 1 In. clearance minimum between top of
furnace and combustible material.
2. The entire length of furnace must be
supported when furnace is used in horizontal
position.
3
/
8
-IN. HEX NUT
& WASHER (4)
REQD PER ROD
(A) PREFERRED ROD LOCATION
(B) ALTERNATE ROD LOCATION
(A)
(B)
(A)
(B)
(B)
(A)
(A)
(B)
—9—
