HORIZONTAL SIDEWALL VENTING
For applications where vertical venting is not possible, the only approved method of horizontal venting is the use of an auxiliary power vent. Auxilary power venters must be approved by CSA, UL, or other recognized safety agencies. Follow all application and installation details provided by the manufacturer of the power vent.
FILTER PERFORMANCE
The airflow capacity data published in the “Blower Perfor- mance” table listed above represents blower performance WITHOUT filters.
All applications of these furnaces require the use of field installed air filters. All filter media and mounting hardware or provisions must be field installed external to the furnace cabi- net. DO NOT attempt to install any filters inside the furnace.
NOTE: Single side return above 1800 CFM is approved as long as the filter velocity does not exceed filter manufac- turer’s recommendation and a transition is used to allow use on a 20x25 filter.
Recommended Filter Sizes
CFM | Cabinet | Side | Bottom | |
Size | (in) | (in) | ||
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800 | A | 16 x 25 | 14 x 25 | |
1000 | A | 16 x 25 | 14 x 25 | |
1200 | A | 16 x 25 | 14 x 25 | |
1200 | B | 16 x 25 | 16 x 25 | |
1600 | B | 16 x 25 | 16 x 25 | |
1600 | C | 16 x 25 | 20 x 25 | |
2000 | C | (2) 16 x 25 | 20 x 25 | |
2200 | C | (2) 16 x 25 | 20 x 25 | |
2000 | D | (2) 16 x 25 | 22 x 25 |
NOTES:
1.Air velocity through throwaway type filters may not exceed 300 feet per minute (91.4 m/min). All velocities over this require the use of high velocity filters.
2.Do not exceed 1800 CFM using a single side return and a 16x25 filter. For CFM greater than 1800, you may use two side returns or one side and the bottom or one return with a transition to allow use of a 20x25 filter.
Unit Clearances to Combustibles (All dimensions in inches, and all surfaces identified with the unit in an upflow configuration)
Application | Top | Front | Rear | Left | Right | Flue | Floor/ | Closet | Alcove | Attic | Line | |
Side | Side | Bottom | Contact | |||||||||
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Upflow | 1 | 6 | 0 | 0 | 3 | 6 | Combustible | Yes | Yes | Yes | No | |
Upflow | 1 | 3 | 0 | 0 | 0 | 1 | Combustible | Yes | Yes | Yes | No | |
Downflow | 1 | 6 | 0 | 0 | 3 | 6 | 11 | Yes | Yes | Yes | No | |
Downflow | 1 | 3 | 0 | 0 | 0 | 1 | 11 | Yes | Yes | Yes | No | |
Horizontal | 1 | 6 | 0 | 0 | 3 | 6 | Combustible | No | Yes | Yes | Yes2 | |
Horizontal | 1 | 3 | 0 | 0 | 0 | 1 | Combustible | No | Yes | Yes | Yes2 |
1.Special floor base or air conditioning coil required for use on combustible floor.
2.Line contact only permitted between lines formed by the intersection of the rear panel and side panel (top in horizontal position) of the furnace jacket and build- ing joists, studs or framing.
Johnson Controls Unitary Products | 3 |
