A3-1N MINIMUM
CLEARANCE TO INTAKE
IS REQUIRED
3/8-1N. ROD
ANGLE --_
IRON OR
EQUIVALENT "_
(B)
(B)
(A)
ALTERNATE SUPPORT
LOCATION 4-IN MIN
8-IN MAX
(A) ROD LOCATION
USING DIMPLE
LOCATORS
tSEE DIMENSIONAL
DWG FOR
LOCATIONS)
3/8-1N
& WASHER (4)
REQD PER ROD
(A) PREFERRED ROD LOCATION
(B) ALTERNATE ROD LOCATION
13/16-1N.MAX
(B) ALTERNATE SUPPORT
LOCATION FROM BACK
NOTES: 1 A 1 In. clearance minimum between top of
furnace and combustibIe material.
2 The entire length of furnace must be
supported when furnace is used in
horizontal position to ensure proper
drainage.
3 Bottom side combustion-air entry cannot
be used when furnace is installed with
hangers as shown
Fig. 24_Crawlspace HorizontN Application
A96209
TaNe 4--Filter information
FURNACE FILTER SIZE (IN.l* FILTER TYPE
CASING
W{DTN (IN.} Side Return Bottom Return FRAMED
17-1t2 (1) 16 X 25 X 11- (1) 16 X 25 X 11- Cleanable
21 (1)16X25X1 (1)20 X 25 X It C_eanab_e
24_1/2 (1 or 2/ 16 X 25 X 1 (1/ 24 X 25 X 11- C_eanable
* Filters can be field modified by cutting to the desired size. Alternate sizes
can be ordered from your distributor or dealer
? Factory-provided with furnace.
(UT HAZARD
Failure to %llow 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.
UNIT MAY NOT OPERATE
Failure to fk_llow this caution may result in intem_ittent unit
operation.
For airflow requirements above 1800 CFM, see Air Deliveo-
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 ensm'e adequate remm air
openings for airflow requirements above 1800 CFM.
NOTE: Side returnoair openings can ONLY be used in 1_PFLOW
configurations, Install _ter(s) as shown in Fig, 25,
WASHABLE
FILTER \
RETAINER
SPRING
\
A00217
Fig. 25--Filter Installed for Side Inlet
Bottom return-air opening may be used with all 4 orientations.
Filter may need to be cut to fit some I:tmaace widths Install filter
as shown in Fig 26.
Step 6--Bottom Cmosure Panel
These _i/rnaces are shipped with bottom enclosure panel installed
in bottom return-air opening. This panel MUST be in place when
side return air is used.
To remove bottom closure panel, perfbm_ the following:
1. Tilt or raise furnace and remove 2 screws holding fiont filler
panel. (See Fig. 27.)
2. Rotate fiont filler panel downward to release holding tabs.
3. Remove bottom closure panel.
2i
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