COMBUSTIBLE FLOORING BASE OPENING SIZE
Cabinet | Catalog | Front to Rear | Side to Side | |||
|
|
|
| |||
Width | Number | in. | mm | in. | mm | |
B Cabinet | 11M60 | 22 | 559 | 18 − 3/4 | 476 | |
(17.5") | ||||||
|
|
|
|
| ||
C Cabinet | 11M61 | 22 | 559 | 22 − 3/4 | 578 | |
(21") | ||||||
|
|
|
|
| ||
|
| TABLE 2 |
|
|
| |
FURNACE |
|
|
|
| ||
|
|
| SUPPLY AIR |
| ||
|
|
|
| PLENUM |
| |
PROPERLY |
|
| COMBUSTIBLE |
| ||
SIZED FLOOR |
|
| ||||
| FLOORING BASE | |||||
OPENING |
|
| ||||
|
|
|
|
| ||
FIGURE 13
2.After opening is cut, set the combustible flooring base into opening.
3.Check fiberglass strips on the combustible flooring base to make sure they are properly glued and positioned.
4.Lower supply air plenum into the combustible flooring base until plenum flanges seal against fiberglass strips.
NOTE: Be careful not to damage fiberglass strips. Check for a tight seal.
5.Set the furnace over the plenum.
6.Ensure that the seal between the furnace and plenum is adequate.
Installation on Cooling Coil Cabinet (Figure 14)
NOTE: Downflow combustible flooring kit is not used.
FURNACE
COOLING COIL
PROPERLY
SIZED FLOOR
OPENINGPLENUM
FIGURE 14
Return Air Opening - Downflow Units
Return air may be brought in only through the top opening of a furnace installed in the downflow position. The following steps should be taken when installing plenum:
1.Bottom edge of plenum should be flanged with a hemmed edge (See Figure 15 or 16).
2.Sealing strips should be used to ensure an airtight seal between the cabinet and the plenum.
3.In all cases, plenum should be secured to top of furnace using sheet metal screws.
4.Make certain that an adequate seal is made.
PLENUM
(Field Provided)
SECURE FROM OUTSIDE CABINET
SEALING STRIP | CABINET | |
SIDE PANEL | ||
(Field Provided) | ||
|
Side View
FIGURE 15
1.Refer to
2.When cooling cabinet is in place, set and secure the furnace according to the instructions that are provided with the cooling coil. Secure the furnace to the cabinet.
3.Seal the cabinet and check for air leaks.
PLENUM
(Field Provided)
SECURE FROM |
|
INSIDE CABINET | Side View |
SEALING STRIP (Field Provided)
CABINET
SIDE PANEL
FIGURE 16
Issue 1109 | Page 11 of 48 |
