Sears N8MPL100J22B1 Typical Horizontal Installation, Downflow, Fire Hazard, Must not

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The

horizontal

furnaces

i

may

be

installed

directly

on

combustible

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i

i

i

it is recommended

for

further

wood

flooring

or

supports,

however,

fire protection

cement

board

or

sheet

metal

is placed

between the

SUPPLY

furnace

and

the

combustible

wood

floor

and

extend

12"

beyond

the front

of the

furnace

louver

door.

(This

is

a

recommendation

AIR

only, not a requirement).

This

furnace

MUST NOT

be

installed

directly

on

carpeting,

tile or

RETURN

N

other

combustible

material

other

than wood

flooring

or supports.

GAS SUPPLY

25-23-17

Horizontal

If you purchased a multi-position furnace, it can be installed hori- zontally in an attic, basement, crawl space, alcove, or suspended from a ceiling in a basement or utility room in either a right or left airflow position. (see Figure 4)

Horizontally installed furnaces may be vented out the top of the unit or out the side facing u p. See"Side venting" for instructions to rotate the vent to the side.

The minimum clearances to combustibles MUST be maintained

between the furnace and adjacent construction, as shown in Figure 1 and Figure 2. ONLY the corner of the cabinet is allowed to contact the rafters as shown in Figure 4. All other clearances MUST be observed as shown in Figure 1 and Figure 2.

Typical Horizontal Installation

SUPPLY

GAS SUPPLY

OPTIONAL

VENT LOCATION

25- 23-18a

If the furnace is to be suspended from the floor joists in a basement or crawl space or the rafters in an attic, it is necessary to use steel pipe straps or an angle iron frame to attach the furnace. These straps should be attached to the furnace bottom side with sheet metal screws and to the rafters or joists with bolts. The preferred method is to use an angle iron frame bolted to the rafters or joists.

If the furnace is to be installed at ground level in a crawl space, con- sult local codes. A concrete pad 1" to 2" thick is recommended.

Twenty four inches (24") is required between the front of the fur-

nace and adjacent construction or other appliances. This should be maintained for service clearance.

Keep all insulating materials clear from Iouvered door. Insulating materials may be combustible.

Downflow

FIRE HAZARD.

Failure to install unit on noncombustible subbase

could result in death, personal injury and/or property damage.

Place furnace on noncombustible subbase on

downflow applications, unless installing on noncombustible flooring.

If you purchased a Multi-position furnace (N8MP or *8MP) it may

be installed in a downflow configuration, (see Figure 5). The mini- mum clearances to combustion construction MUST be maintained

between the furnace and adjacent construction, as shown in Figure 1 and Figure 2.

In addition to clearances in Figure 1 and Figure 2, clearance for the vent pipe must be considered.

A subbase for combustible floors MUST be used when the furnace is installed as a downflow on combustible material. See 11. "Duct-

work and Filter" (Downflow Section). The outlet flange must be bent flat for downflow installation.

When installing a four-position furnace in the downflow position (not the *8DNL furnace), the logo is to be repositioned so that it is

rightside-up as follows: T8MPN/L

1.Find the door hardware kit that is stored in the furnace and save it.

2.Carefully remove logo from the outside of burner compartment door and save it.

3.Carefully remove two small plug buttons from outside of blow-

er compartment door and save them.

4.Remove two thumbscrews from blower compartment door.

5.Install two thumbscrews in holes at other end of blower

compartment door from where thumbscrews were removed.

6.Install new strip of rubber gasket on inside of blower compart- ment door on edge that does not already have a gasket.

7.Install logo retainer pins into holes in blower compartment door from which plug buttons were removed.

8.Install plug buttons into holes in burner compartment door from which logo was removed.

9.Install blower compartment door on furnace with bevel edge and logo at top.

10.Install burner compartment door on furnace with bevel edge at bottom.

N8MPN/L, C81VlPN/L, H8MPN/L

1, Carefully remove logo from burner compartment door and save it.

2.Turn the logo rightside-up, and install the logo retainer pins

into holes in burner compartment door.

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