21
SECTION 1 - INSTALLATION
FORM 145.18-IOM1
ISSUE DATE: 8/30/2018
1
1. Locate the drywall opening at a distance from
the unit so that it prevents the RA panel from
contacting the unit sleeve. See
Figure 11 on page
21 and Figure 12 on page 22
.
2. Center the RA panel throat opening to the unit
cabinet RA flange opening.
3. Fasten the RA panel to frame opening using the
screws provided. See
Figure 11 on page 21
.
Figure 14 on page 23
shows the opening for mount-
ing an ADA compliant thermostat at 48 inches above
floor. Note that location of the opening on the door
changes if the cabinet is ordered with a stand. A left
hand opening door is shown. The RA panel with ADA
is not reversible. It must be ordered in either a left or
right-hand opening configuration, determined by the
location of the door hinge.
Vertical Stack Cabinet
Top View
Return Air Flange
Standard = 1 inch
Optional OA Fresh Air = 4.25 inches
Wall Stud
(Drywall to Fastener
Based on 0.5-inch Drywall
1-3/16 inch
Rear Closet to Cabinet Back:
No Risers = 0.5-inch Minimum
With Risers = 5-inch Minimum
2.25-inch Minimum
(Unit Sleeve to Drywall)
B
C
H
F
Min. 1/8-inch, Max. 3/8-inch Gap
(RA Flange Must Not Contact
Acoustic Door Frame)
D
E
0.5-inch Drywall
6 x Fasteners
G
A
Vertical Stack Cabinet Top View
UNIT
SIZE
A
(PANEL
WIDTH)
B
(SLEEVE
WIDTH)
C
(R/A PANEL
OPENING)
D
(ROUGH IN
WIDTH)
E
(UNIT
WIDTH)
F
(UNIT
DEPTH)
G
(NO OA
OPTION)
G
(OA OPTION)
09/12/15/18
25 3/4
19
19 1/4
23 3/4 ± 1/8
20
20
23 1/4 MIN
23 1/2 MAX
27 1/4 MIN
27 1/2 MAX
24/30/36
29 3/4
23
23 1/4
27 3/4 ± 1/8
24
24
27 1/4 MIN
27 1/2 MAX
31 1/4 MIN
31 1/2 MAX
NOTE
All dimensions are in inches.
LD19500
FIGURE 11 -
CRITICAL RETURN AIR (RA) PANEL WITH UNIT CABINET INSTALLATION DIMENSIONS
