| EL280DF UNIT | |
| COOLING COIL | |
PROPERLY | PLENUM | |
SIZED FLOOR | ||
| ||
OPENING |
|
FIGURE 8
Return Air Opening −− Downflow Units
The following steps should be taken when installing ple- num:
1 − Bottom edge of plenum should be flanged with a hemmed edge (See figure 9).
PLENUM | SECURE FROM |
| OUTSIDE CABINET |
Side View |
|
| HEMMED EDGE |
SEALING STRIP (Field Provided)
CABINET SIDE PANEL
FIGURE 9 2 − Sealing strip should be used.
3 − In all cases, plenum should be secured to top flanges of furnace with sheet metal screws.
| PLENUM |
SECURE FROM IN- | Side View |
SIDE CABINET |
|
| HEMMED EDGE |
FIBERGLASS |
|
SEALING STRIP | CABINET SIDE |
| |
(Field Provided) | PANEL |
|
FIGURE 10
4 − In closet installations, it may be impossible to install sheet metal screws from the outside. In this case, make plenum with a removable front and install screws from the inside (See figure 10).
5 − Make certain that an adequate seal is made.
Setting Equipment
WARNING
Do not install the furnace on its front, back or in the horizontal position. See figure 12. Do not connect the return air ducts to the back of the furnace. Doing so will adversely affect the operation of the safety con- trol devices, which could result in personal injury or death.
Install the EL280DF gas furnace as shipped in the down- flow position only. Do not install the furnace hori- zontally.
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 11. 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 washer must be removed before the furnace is placed into opera- tion. After the bolt and washer have been removed, the rig- id leg will not touch the blower housing.
UNITS WITH 1/2 HP BLOWER MOTOR
RIGID LEG
remove shipping bolt and washer
FIGURE 11
WARNING
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 inju- ry or death.
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