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Filter Arrangement - Kenmore N8MSL0701412A1 Installation Instructions Manual

80% single stage psc motor category i, gas furnace
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Figure 13 - Furnace, Plenum, and Coil or Coil Casing
Installed on a Combustible
Floor
FURNACE
APPROVED
COIL ASSEMBLY
OR
COIL BOX
COMBUSTIBLE
FLOORING
I
_f,===== SHEET METAL =====.=_
PLENUM
FLOOR
OPENING
E
\\\\_
A08556
Bottom Return Air Inlet
These
furnaces
are
shipped
with
bottom
closure
panel
installed in bottom return-air
opening. Remove and discard
this panel when bottom return air is used. To remove bottom
closure panel, perform the following:
1. Tilt or raise furnace and remove 2 screws holding bot-
tom filler panel. (See Figure 9)
2. Rotate bottom filler panel downward to release holding
tabs.
3. Remove bottom closure panel.
4. Reinstall bottom filler panel and screws.
HORIZONTAL INSTALLATION
FIRE,
EXPLOSION,
AND
CARBON
MONOXIDE
POISONING
HAZARD
Failure to follow this warning could result in personal
injury, death, or property damage.
Do not install the furnace on its back or hang furnace
with control compartment
facing
downward.
Safety
control operation
will be adversely
affected. Never
connect return-air
ducts to the back of the furnace.
The furnace can be installed horizontally
in an attic or crawl
space on either the left-hand
(LH) or right-hand
(RH) side.
The furnace can be hung from floor joists, rafters or trusses or
installed on a non-combustible
platform,
blocks, bricks or
pad.
Suspended
Furnace Support
The furnace may be supported under each end with threaded
rod, angle iron or metal plumber's
strap as shown.
(See
Figure 15 and Figure 16) Secure angle
iron to bottom
of
furnace
as
shown.
Heavy-gauge
sheet
metal
straps
(plumber's straps) may be used to suspend the furnace from
each bottom corner. To prevent screws from pulling out, use 2
#8 x 3/4-in.
(19 mm) screws into the side and 2 #8 x 3/4-in.
(19 mm) screws in the bottom of the furnace casing for each
strap. (See Figure 15 and Figure 16)
If the screws are attached to ONLY the furnace sides and not
the bottom, the straps must be vertical against the furnace
sides and not pull away from the furnace sides, so that the
strap attachment
screws are not in tension (are loaded in
shear) for reliable support.
Platform Furnace Support
Construct
working
platform
at location
where all required
furnace clearances are met. (See Figure 2 and Figure 17) For
furnaces with 1-in. (25 mm) clearance requirement
on side,
set furnace on non- combustible blocks, bricks or angle iron.
For crawl space installations, if the furnace is not suspended
from the floor joists, the ground underneath
furnace must be
level and the furnace set on blocks or bricks.
Roll-Out
Protection
Provide a minimum 17-3/4 in. x 22 in. (451 x 559 mm) piece
of sheet metal for flame roll-out
protection in front of burner
area for furnaces closer than 12 inches (305 mm) above the
combustible
deck or suspended
furnaces
closer than
12
inches (305 mm) to joists. The sheet metal MUST extend
underneath the furnace casing by 1 in. (25 mm) with the door
removed.
The bottom closure panel on furnaces of widths 17-1/2
in.
(445 mm)
and
larger
may
be used for
flame
roll-out
protection
when bottom
of furnace
is used for return air
connection.
See Figure 17 for proper orientation
of roll-out
shield.
Bottom Return Air Inlet
These
furnaces
are shipped
with bottom
closure
panel
installed in bottom return-air
opening. Remove and discard
this panel when bottom return air is used. To remove bottom
closure panel, perform the following:
1. Tilt or raise furnace and remove 2 screws holding bot-
tom filler panel. (See Figure 9)
2. Rotate bottom filler panel downward to release holding
tabs.
3. Remove bottom closure panel.
4. Reinstall bottom filler panel and screws.
Side Return Air Inlet
These
furnaces
are shipped
with bottom
closure
panel
installed in bottom return-air
opening. This panel MUST be in
place when side return air inlet(s) is used without a bottom
return air inlet.
Not all horizontal furnaces are approved
for side return air
connections.
(See Figure 20)
FILTER ARRANGEMENT
CARBON MONOXIDE AND POISONING HAZARD
Failure to follow this warning could result in personal
injury, death and/or property damage.
Never operate a furnace without a filter or with filter
access door removed.
There are no provisions
for an internal filter rack in these
furnaces.
A field-supplied
accessory external filter rack is required.
This furnace requires 1 in. (25 mm) external filter rack.
Refer to the instructions supplied with external filter rack for
assembly and installation options.
12
441 01 1402 02

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