American Standard UHMB080ACV3VB Series Installer's Manual page 12

Installer's Guide
a. Remove the filter.
b. Remove the bottom panel.
c. Pre-drill two engagement holes with 3/16" drill at
dimple locations. See Figure 13.
d. With the filter removed, the filter rack is
compressed 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 14.
e. Reinstall the furnace filter in the bottom position
by inserting the chamfer end first into the filter
rack. See Figure 19.
ALTERNATE FILTER RACK INSTALLATION FOR SIDE RETURN
AIR ON UPFLOW FURNACES (LEFT OR RIGHT) - BAYRACK960
NOTE:
The filter rack installation is not allowed for right side
return on the following models: *UHMB060ACV3V,
*UHMB080ACV3V & *UHMC100ACV4V. See Figure 21
for alternate upflow filter clip/ bracket installation.
The following checklist should be used when installing a
right or left side return filter on an upflow furnace:
a. Remove the filter.
b. Leave the bottom panel in place.
c. Make side cutout by following the directions in
the "Return Air Duct Connections" section on
page 10.
d. 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 13, 15-18.
e. reinstall the furnace filter in the side position by
inserting the chamfer end first into the filter rack.
RETURN AIR FILTERS FOR UPFLOW FURNACE IN HORIZONTAL
CONFIGURATION
When the upflow furnace is installed in the horizontal
configuration, the return air filters must be installed
exterior to the furnace cabinet. Remote filter grilles may
be used for homeowner convenience or the filters may be
SIDE ENGAGEMENT
⑭
Furnace
Cabinet
Side
Engagement Hole
For Filter Rack
Installation With
Bottom Return
(Pre-drill 3/16" diameter
clearance holes)
12
Filter
Rack
Filter Rack
Retaining
Screw/Pin
18-CD30D1-20-EN
⑮
BOTTOM ENGAGEMENT
Furnace
Cabinet
Side
⑯
SIDE
CUTOUT
RETAINING
PIN
(Both Sides)
SPRINGS
FILTER
RACK
RAILS
Typical Upflow Left Side Return Filter Rack Installation
⑰
BOTTOM
PANEL
INSTALLED
Typical Upflow Right Side Return Filter Rack Installation
Filter Rack
Retaining
Screw/Pin
Filter
Rack
Bottom Panel
BOTTOM
PANEL
INSTALLED
SIDE
CUTOUT
RETAINING
PIN
(Both Sides)
SPRINGS
FILTER
RACK
RAILS