18-CD31D1-3
11
Installer’s Guide
Cabinet Width Left Side Bottom
Right Side
17.5
X
X
X
21
X
X
X
24.5
X
X
X
1. UD060C/R936K0 has 10x7 blower which requires use of alternate
filter clips for left side filter. "K1" and later use the filter rack.
2. Remove bottom front channel to install or reposition filter rack.
X
- All Models
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 in an upflow furnace:
a. Remove the filter.
b. Remove the filter rack.
c. Leave the bottom panel in place.
e. Make side cutout by following the directions in the
“Return Air Duct Connections” section on page 8.
e. Compress the filter rack and reinstall in the side po-
sition on the furnace. Confirm that the upper retain-
ing 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 17-20.
f. Reinstall the furnace filter in the side position by
inserting the chamfer end first into the filter rack.
Filter
Rack
Furnace
Cabinet
Side
Filter Rack
Retaining
Screw/Pin
Engagement Hole
For
Bottom Return
Filter Rack
Installation With
Y
RETAINING
PIN
(Both Sides)
SPRINGS
SIDE
CUTOUT
FILTER
RACK
RAILS
BOTTOM
PANEL
INSTALLED
Airflo
w
P
Typical Upflow Right Side Return Filter Rack Installation
RETAINING
PIN
(Both Sides)
SPRINGS
SIDE
CUTOUT
FILTER
RACK
RAILS
BOTTOM
PANEL
INSTALLED
Airflo
w
Typical Upflow Left Side Return Filter Rack Installation
O
Filter
Rack
Assembly
Furnace
Blower
Deck
Filter Rack
Retaining
Screw/Pin
Engagement Hole
For
Return
Filter Rack
Installation With
Side
Furnace
Cabinet
Side
BLOWER
DECK
I
BOTTOM ENGAGEMENT
Bottom Panel
Filter
Rack
Furnace
Cabinet
Side
Filter Rack
Retaining
Screw/Pin
Engagement Hole
For
Bottom Return
Filter Rack
Installation With
U
