22
FORM 145.18-IOM2
ISSUE DATE: 06/17/2020
SECTION 1 - INSTALLATION
RETURN AIR FLANGE
STANDARD = 1.0”
OPTIONAL OA WITHOUT DAMPER = 2.5”
OPTIONAL OA WITH DAMPER = 4.25”
0.5” DRYWALL
0.5”
0.5” MIN.
5.0” MIN.
2.25” MIN.
UNIT
MODEL
(A)
PANEL
WIDTH
(B)
SLEEVE
WIDTH
(C)
RA PANEL
OPENING
(D)
ROUGH IN
WIDTH
(E)
UNIT
WIDTH
(F)
UNIT
DEPTH
(G)
NO OA
OPTION
(G)
OA OPTION,
NO DAMPER
(G)
OA OPTION,
WITH DAMPER
09/12/15/18 25.75
19
19.25
23.75 ± 0.125
20
20
23.25 MIN
23.50 MAX
24.75 MIN
25.00 MAX
26.50 MIN
26.75 MAX
24/30/36
29.75
23
23.25
27.75 ± 0.125
24
24
27.25 MIN
27.50 MAX
28.75 MIN
29.00 MAX
30.50 MIN
30.75 MAX
NOTE:
All dimensions are in inches.
LD19500
FIGURE 13 -
CRITICAL RETURN AIR (RA) PANEL WITH UNIT CABINET INSTALLATION DIMENSIONS
