Setting Equipment - Lennox SL280DFNV Installation Instructions Manual

Setting Equipment

WARNING
Do not install the furnace on its front, back or in the
horizontal position. See figure 13 Do not connect
the return air ducts to the back of the furnace. Doing
so will adversely affect the operation of the safety
control devices, which could result in personal
injury or death.
Install the SL280DFNV gas furnace as shipped in the
downflow position only. Do not install the furnace horizon-
tally.
Select a location that allows for the required clearances
that are listed on the unit nameplate. Also consider gas
supply connections, electrical supply, vent connection,
and installation and service clearances [24 inches (610
mm) at unit front]. The unit must be level.
NOTE - Units with 1/2 hp blower motors are equipped with
three flexible legs and one rigid leg. See figure 12. The
rigid leg is equipped with a shipping bolt and a flat white
plastic washer (rather than the rubber mounting grommet
used with a flexible mounting leg). The bolt and wash-
er must be removed before the furnace is placed into
operation. After the bolt and washer have been removed,
the rigid leg will not touch the blower housing.
Front
The blower access panel must be securely in place
when the blower and burners are operating. Gas
fumes, which could contain carbon monoxide, can
be drawn into living space resulting in personal
injury or death.
Back
FIGURE 13
Page 10
MODELS WITH 1/2 HP
BLOWER MOTOR
RIGID LEG
remove shipping bolt and washer
FIGURE 12
WARNING
Horizontal