Manual 2100-581D
Page
8 of 26
FIGURE 3A
W17A2, W17L2, W18A2, W18L2, W24A2, W24L2
Mounting Instructions
12"
12"
12"
12"
12"
20"
20"
1"
3"
4" Ty
p.
8"
20
1 2
"
12"
1"
3
1 8
"
4" Ty
p.
5"
7 8
"
3
13 16
"
2"
2"
7
1 16
"
1 16
"
7
CO
NT
RO
LS
AND
HEA
TER
ACCESS
NOTES:
TOP
TO
P FL
ASH
IN
G
AT TI
M
E
OF I
NS
TA
LL
ATI
ON.
OPEN
ING
M
IS
-3157
EN
TI
RE
L
EN
GT
H
OF T
OP.
RE
TURN
AIR
DUCT
W
all
Open
ing
and
Ho
le
Loca
tion
Vi
ew
Ri
gh
tS
ide
Vi
ew
OF
CAU
LK
IN
G
AL
ONG
PANEL
FO
AM
AI
R
SEAL
WA
LL
ST
RUC
TURE
WA
LL
HEA
TER
ACCESS
RA
IN
FL
ASH
ING
SILI
CO
NE
CAU
LK
IN
G
BE
PL
ACED
BEH
IND
IS
ON
OPP
OS
IT
E (L
EFT)
SI
DE.
THE
SI
DE
MO
UN
TI
NG
FL
AN
GES
AND
UNDER
SEA
L
W
IT
H
BEAD
IT I
S
REC
OMM
ENDED
T
HA
T
A
BEAD
OF
W**A
UN
IT
SH
OW
N,
W**
L
UN
IT
SUPP
LY
AIR
SUPP
LI
ED
Re
tu
rn
O
pen
ing
Sup
ply
O
pen
ing
