Installer’s Guide
TABLE 4
UPFLOW FURNACE RETURN AIR FILTERS
CABINET | QTY* | CABINET | CABINET | |
WIDTH | BOTTOM FILTER | SIDE FILTER | ||
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1 | 14" X 25" X 1" | |||
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1 | 17" X 25" X 1" | |||
21" | 1 | 20" X 25" X 1" | ||
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1 | 24" X 25" X 1" | |||
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*First letter may be "A" or "T"
**NOTE: For upflow 5 ton airflow models where the airflow requirement exceeds 1800 CFM - Modles will require return air openings and filters on: (1) both sides, or (2) one side and the bottom, or (3) just on the bottom
OPTIONAL FILTER RACK INSTALLATION FOR BOTTOM RETURN
The following checklist should be used when installing a bottom return filter on an upflow furnace:
a.Remove the filter.
b.Remove the filter rack.
c.Remove the bottom panel.
d.With the filter removed, the filter rack is com- pressed and then inserted into the bottom of the furnace. The retaining screw/pin on each side inserts into engagement holes at the bottom of the furnace cabinet side. See Figure 18.
e.Reinstall the furnace filter in the bottom position by inserting the chamfer end first into the filter rack.
FILTER RACK INSTALLATION FOR SIDE RETURN AIR ON UPFLOW FURNACES (LEFT OR RIGHT)
The following checklist should be used when installing a right or left side return filter on an upflow furnace:
a. Remove the filter.
b. Remove the filter rack.
c. Leave the bottom panel in place.
d. Make side cutout by following the directions in the “Return Air Duct Connections” section on page 10.
e. Compress the filter rack and reinstall in the side position on the furnace. Confirm that the upper retaining pin/screw locks into the engagement hole in the blower deck and the lower pin/screw rests against the side of the bottom panel. See Figures
f. Reinstall the furnace filter in the side position by inserting the chamfer end first into the filter rack.
Optional conversion kits for horizontal filters are BAYFLTR203 for 17 1/2" width cabinets, BAYFLTR204 for 21" width cabinets, and BAYFLTR205 for 24" width cabinets. These include filters and brackets necessary for horizontal filters. In addition, optional door kit BAYFLTR206 is also available. See Figures 17 and 22.
r
Airf low
SIDE
tCUTOUT
Airflow
RETAINING
PIN
(Both Sides)
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| SIDE |
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| CUTOUT | |
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| fl |
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| ir |
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| A |
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| RETAINING |
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| PIN |
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| SPRINGS |
| BOTTOM |
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| FILTER | |
| PANEL |
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| RACK | |
| INSTALLED |
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| RAILS | |||
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Typical Upflow Right Side Return Filter Rack Installation
u
SPRINGS
FILTER BOTTOM
RACK PANEL
RAILS INSTALLED
Typical Upflow Left Side Return Filter Rack Installation
Airflow
Optional door kit
BAYFLTR206
Typical Horizontal Filter Installation
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