Lennox MPGA 050 B3, Application Manual

Failure to comply with all of the clearances will
create a fire hazard.

The furnace should also be located as near to the

center of the air distribution system as possible, and
should be installed level.

This furnace may be installed on non-combustible

flooring or on wood flooring, however, it 

must not

 be

installed directly on carpeting, tile or any other
combustible material.

In the 

downflow

 position, it 

must

be installed on non-combustible flooring or on the special
base listed on the rating label.

In a horizontal position, line contact is only

permissible between lines formed by the intersection of
the furnace top, the front and back sides, and building
joists, studs or framing (See Figure 1).

Figure 1

HORIZONTAL LINE CONTACT

Furnace must not lean back. It must be level or

tilt up to 2° to the front. (See Figure 1.)

A clearance of at least 30" should be provided at the

front of the unit for servicing. For attic installations, the
passageway and servicing area adjacent to the furnace
should be floored.

If the furnace is to be installed in a crawl space,

consult local codes. (Use of a concrete pad 1" to 2" thick
is recommended.)

If the furnace is to be suspended from the ceiling, it

will be necessary to use steel pipe straps around each
end of the furnace. These straps should be attached to
the furnace with sheet metal screws and to the rafters
with bolts. The furnace may also be suspended by using
an angle iron frame bolted to the rafters. (See Table on
page 3 for size and weight of furnace.) Care must be
taken to allow for service access.

If a furnace is to be installed in a residential garage,

it must be installed so the burners and the ignition source
are located not less than 18" above the floor and the
furnace must be located or protected to avoid physical
damage by vehicles.

Do not place combustible material on the furnace
jacket. Failure to comply with this warning will
create a fire hazard.

This furnace is not watertight and is not designed
for outdoor installation. This furnace shall be
installed in such a manner as to protect the
electrical components from water. Outdoor
installation would lead to a hazardous electrical
condition and to premature furnace failure.

20541501

Issue 0240

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