Figure 11 - Critical Return Air (Ra) Panel With Unit Cabinet Installation Dimensions - Johnson Controls VB09 Installation, Operation And Maintenance Manual

FORM 145.18-IOM1
ISSUE DATE: 8/30/2018
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.
0.5-inch Drywall
6 x Fasteners
G
A
UNIT
(PANEL (SLEEVE
SIZE
WIDTH) WIDTH)
09/12/15/18 25 3/4
24/30/36 29 3/4
NOTE
All dimensions are in inches.

FIGURE 11 - CRITICAL RETURN AIR (RA) PANEL WITH UNIT CABINET INSTALLATION DIMENSIONS

D
E
Vertical Stack Cabinet
Top View
B
C
F
Vertical Stack Cabinet Top View
Min. 1/8-inch, Max. 3/8-inch Gap
(RA Flange Must Not Contact
Acoustic Door Frame)
A
B C
(R/A PANEL (ROUGH IN
OPENING) WIDTH)
19 19 1/4 23 3/4 ± 1/8
23 23 1/4 27 3/4 ± 1/8
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.
Return Air Flange
Standard = 1 inch
Optional OA Fresh Air = 4.25 inches
1-3/16 inch
H
Rear Closet to Cabinet Back:
No Risers = 0.5-inch Minimum
With Risers = 5-inch Minimum
2.25-inch Minimum
(Unit Sleeve to Drywall)
D E F
(UNIT (UNIT
WIDTH) DEPTH)
20 20
24 24
SECTION 1 - INSTALLATION
Wall Stud
(Drywall to Fastener
Based on 0.5-inch Drywall
G
G
(NO OA
(OA OPTION)
OPTION)
23 1/4 MIN 27 1/4 MIN
23 1/2 MAX 27 1/2 MAX
27 1/4 MIN 31 1/4 MIN
27 1/2 MAX 31 1/2 MAX
1
LD19500
21