Front | Horizontal |
Back |
FIGURE 12
Downflow Application
Allow for clearances to combustible materials as indicated
on the unit nameplate. Minimum clearances for closet or al- cove installations are shown in figure 13.
Downflow Application Installation Clearances
Top
Left Side | Right Side |
Bottom
Type of Vent | Type C | Type B1 | |
Connector | |||
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Top | 1 in. (25 mm) | 1 in. (25 mm) | |
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*Front | 2−1/4 in. (57 mm)** | 2−1/4 in. (57 mm) | |
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Back | 0 | 0 | |
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Sides | 0† | 0 | |
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Vent | 6 in. (152 mm) | 1 in. (25 mm) | |
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Floor | NC†† | NC†† | |
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*Front clearance in alcove installation must be 24 in. (610 mm). Maintain a minimum of 24 in. (610 mm) for front service access. ** 4−1/2 in. if a single wall vent pipe is used.
†Left side requires 3 in. if a single wall vent is used on 14 −1/2 in. cab- inets, or 2 in. if a single wall vent is used on 17 − 1/2 in. cabinets. ††The furnace may be installed on a combustible wood floor if an optional additive base is installed between the furnace and the combustible floor.
WARNING
Improper installation of the furnace can result in per- sonal injury or death. Combustion and flue products must never be allowed to enter the return air system or the living space. Use screws and joint tape to seal the return air system to the furnace.
In platform installations with bottom return air, the furnace should be sealed airtight to the return air ple- num. A door must never be used as a portion of the return air duct system. The base must provide a stable support and an airtight seal to the furnace. Al- low absolutely no sagging, cracks, gaps, etc.
The return and supply air duct systems must never be connected to or from other heating devices such as a fireplace or stove, etc. Fire, explosion, carbon monoxide poisoning, personal injury and/or proper- ty damage could result.
Filters
This unit is not equipped with a filter or rack. A field−pro-
vided high−velocity filter is required for the unit to operate properly. Table 3 lists recommended filter sizes.
A filter must be in place any time the unit is operating.
| TABLE 3 | |
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Cabinet Width |
| Return Air Filter Size (inches) |
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A (14−1/2") |
| 14 x 25 x 1 (1) |
B (17−1/2") |
| 16 x 25 x 1 (1) |
C (21") |
| 20 x 25 x 1 (1) |
FIGURE 13
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