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Series L: Models LB, LBP, LD, and LDP
®
Machined parts coated with rust preventive should
be restored to good condition promptly if signs of
rust occur. Immediately remove the original rust
preventive coating with petroleum solvent and clean
with lint-free cloths. Polish any remaining rust from
surface with crocus cloth or fine emery paper and
oil. Do not destroy the continuity of the surfaces.
Thoroughly wipe clean with Tectyl
®
506 (Ashland Inc.)
or the equivalent. For hard to reach internal surfaces
or for occasional use, consider using Tectyl
®
511M
Rust Preventive, WD-40
®
or the equivalent.
C
A A
B
E
F
D
1.75
(44)
C
A
F
D
E
B
1.75
(44)
B
A
A
1.75
(44)
D
C
F
E
B
A
A
1.75
(44)
C
D
E
Series L Dimensions
Model LB
Size A B C D E F
Damper
Size
Roof
Opening
Weight
Galv.
10
22
(559)
39
(991)
28
(711)
17¼
(438)
17
(432)
3¼
(85)
12
(305)
14½
(368)
56
(25)
14
26
(660)
39
(991)
35
(889)
17½
(445)
18
(457)
4
(102)
16
(406)
18½
(470)
81
(37)
18
30
(762)
39
(991)
40
(1016)
17½
(445)
21
(533)
4½
(114)
18
(457)
20½
(521)
135
(61)
21
30
(762)
51
(1295)
43
(1092)
23
(584)
23
(584)
6
(152)
18
(457)
20½
(521)
145
(66)
24
34
(864)
51
(1295)
45½
(1156)
20½
(521)
23½
(597)
6¾
(171)
24
(610)
26½
(673)
188
(85)
30
40
(1016)
63
(1600)
50
(1270)
29½
(749)
26
5
⁄8
(676)
8½
(216)
30
(762)
32½
(826)
249
(113)
36
46
(1168)
63
(1600)
60
(1524)
27
(686)
32
5
⁄8
(829)
9¾
(248)
36
(914)
38½
(978)
338
(153)
42
52
(1321)
75
(1905)
70
5
⁄8
(1794)
33½
(851)
37
3
⁄8
(949)
11½
(292)
42
(1067)
44½
(1130)
396
(180)
48
58
(1473)
87
(2210)
70
3
⁄8
(1788)
41
(1041)
41½
(1054)
11
5
⁄8
(295)
48
(1219)
50½
(1283)
430
(195)
54
64
(1626)
87
(2210)
79½
(2019)
38
(965)
45
3
⁄8
(1153)
12½
(318)
54
(1372)
56½
(1435)
596
(270)
Model LBP
Size A B C D E F
Damper
Size
Roof
Opening
Weight
Alum.
10
22
(559)
38½
(978)
28
(711)
14
(356)
17
(432)
32
5
⁄8
(829)
12
(305)
14½
(368)
99
(45)
14
26
(660)
40
(1016)
32
(813)
16
(406)
17
(432)
26
(660)
16
(406)
18½
(470)
116
(53)
18
30
(762)
46
(1168)
36
(914)
19
(483)
24½
(622)
30
(762)
18
(457)
20½
(521)
179
(81)
21
30
(762)
46
(1168)
36
(914)
19
(483)
24½
(622)
30
(762)
18
(457)
20½
(521)
191
(86)
24
34
(864)
49½
(1257)
40
(1016)
20
(508)
23½
(597)
34
(864)
24
(610)
26½
(673)
239
(108)
30
40
(1016)
58
(1473)
46
(1168)
23
(584)
26½
(673)
40
(1016)
30
(762)
32½
(826)
318
(144)
36
46
(1168)
63
(1600)
51¾
(1314)
26
(660)
34
3
⁄8
(873)
46
(1168)
36
(914)
38½
(978)
444
(201)
42
52
(1321)
70½
(1791)
58
(1473)
29
(737)
38¼
(972)
52
(1321)
42
(1067)
44½
(1130)
530
(240)
48
58
(1473)
76½
(1943)
64
(1626)
32
(813)
40
3
⁄8
(1026)
58
(1473)
48
(1219)
50½
(1283)
579
(263)
54
64
(1626)
83½
(2121)
70
(1778)
35
(889)
43
5
⁄8
(1108)
64
(1626)
54
(1372)
56½
(1435)
780
(354)
Model LD
Size A B C D E F
Damper
Size
Roof
Opening
Weight
Galv.
60-
75
17
(432)
22
(559)
27
(686)
13½
(343)
13
(330)
2
(51)
8
(203)
10½
(267)
37
(17)
80-
95
19
(483)
28
(711)
27
(686)
13½
(343)
16
(406)
4
(102)
10
(254)
12½
(318)
45
(20)
100-
120
22
(559)
30
(762)
27
(686)
13½
(343)
18
(457)
4
(102)
12
(305)
14½
(368)
57
(26)
Model LDP
Size A B C D E F
Damper
Size
Roof
Opening
Weight
Alum.
60-
75
17
(432
23
(584)
11½
(292)
13½
(343)
—
8
(203)
10½
(267)
49
(22)
80-
95
19
(483)
25
(635)
12½
(318)
16½
(419)
—
10
(254)
12½
(318)
63
(29)
100-
120
22
(559)
28
(711)
14
(356)
18½
(470)
—
12
(305)
14½
(368)
82
(37)
All dimensions given in inches (millimeters). Weights given in pounds (kilograms).
C
A A
B
E
F
D
1.75
(44)
C
A
F
D
E
B
1.75
(44)
B
A
A
1.75
(44)
D
C
F
E
B
A
A
1.75
(44)
C
D
E
C
A A
B
E
F
D
1.75
(44)
C
A
F
D
E
B
1.75
(44)
B
A
A
1.75
(44)
D
C
F
E
B
A
A
1.75
(44)
C
D
E
C
A A
B
E
F
D
1.75
(44)
C
A
F
D
E
B
1.75
(44)
B
A
A
1.75
(44)
D
C
F
E
B
A
A
1.75
(44)
C
D
E