DOWNFLOW AND HORIZONTAL FURNACES
The return-air duct must be connected to return-air opening
provided. DO NOT cut into casing sides or back to attach any
portion of return-air duct. Bypass humidifier connections should
be made at ductwork or coil casing sides exterior to furnace.
V.
FILTER ARRANGEMENT
WARNING:
FIRE, CARBON MONOXIDE AND
POISONING HAZARD
Failure to follow this warning could result in intermittent
unit operation or performance satisfaction.
Never operate unit without a filter or with filter access
door removed.
The air filter arrangement will vary due to application, furnace
orientation, and filter type. The filter may be installed in an
external Filter/Media cabinet (if provided) or the furnace blower
compartment. Factory supplied washable filters are shipped in the
blower compartment.
If a factory-supplied external Filter/Media cabinet is provided,
instructions for its application, assembly, and installation are
packaged with the cabinet. The Filter/Media cabinet can be used
with the factory-supplied washable filter or a factory-specified
high-efficiency disposable filter (see cabinet instructions).
If installing the filter in the furnace blower compartment, deter-
mine location for filter and relocate filter retaining wire if
necessary. See Table 2 to determine correct filter size for desired
filter location. Table 2 indicates filter size, location, and quantity
shipped with this furnace. See Fig. 2 for location and size of
bottom and side return-air openings.
CAUTION:
CUT HAZARD
Failure to follow this caution may result in minor
personal injury.
Use care when cutting support rods in filters to protect
against flying pieces and sharp rod ends. Wear safety
glasses, gloves, and appropriate protective clothing.
CAUTION:
UNIT MAY NOT OPERATE
Failure to follow this caution may result in intermittent
unit operation or performance satisfaction.
For airflow requirements above 1800 CFM, see Air
Delivery table in Product Data literature for specific use
of single side inlets. The use of both side inlets, a
combination of 1 side and the bottom, or the bottom only
will ensure adequate return air openings for airflow
requirements above 1800 CFM.
Fig. 22—Crawlspace Horizontal Application
A93304
NOTES:
ANGLE
IRON OR
EQUIVALENT
(B)
(A) ROD LOCATION
USING DIMPLE
LOCATORS
(SEE DIMENSIONAL
DWG FOR
LOCATIONS)
13
/
16
-IN. MAX
ALTERNATE SUPPORT
LOCATION FROM BACK
ALTERNATE SUPPORT
LOCATION 4-IN. MIN
8-IN. MAX
3
⁄
8
-IN. ROD
(A)
(B)
(A)
(B)
(B)
(A)
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 to ensure proper drainage.
(A) PREFERRED ROD LOCATION
(B) ALTERNATE ROD LOCATION
DRAIN
5
3
⁄
4
″
3
/
8
-IN. HEX NUT
& WASHER (4)
REQD PER ROD
—18—
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Содержание CONDENSING GAS FURNACE 352MAV
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