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Manual 2100-508F
Page 8 of 25
FIGURE 3A
W17A1, W17L1, W18A1, W18L1, W24A1, W24L1
MOUNTING INSTRUCTIONS
12"
12"
12"
12"
12"
20"
20"
1"
3"
4"
Typ.
8"
20
1
2
"
12"
1"
3
1
8
"
4"
Typ.
5"
7
8
"
3
13
16
"
2" 2"
7
1
16
" 7
1
16
"
DUCT
CONTROLS AND HEATER ACCESS
THE SIDE MOUNTING FLANGES AND UNDER
Right Side View
RETURN AIR
1/4" CLEARANCE ON ALL
HEATER ACCESS
IS ON OPPOSITE (LEFT) SIDE.
TOP FLASHING AT TIME OF INSTALLATION.
Wall Opening and Hole Location View
OPENING
ENTIRE LENGTH OF TOP.
MATERIALS
NOTES:
OF CAULKING ALONG
PANEL
FOAM AIR SEAL
FOUR SIDES OF SUPPLY
AIR DUCT IS REQUIRED
FROM COMBUSTABLE
WALL STRUCTURE
TOP
WALL
RAIN FLASHING
SILICONE CAULKING BE PLACED BEHIND
SEAL WITH BEAD
IT IS RECOMMENDED THAT A BEAD OF
W**A UNIT SHOWN, W**L UNIT
SUPPLY AIR
SUPPLIED
Return Opening
Supply Opening
MIS-353 C