Preinstallation checks, Wall opening requirements – Greenheck Sidewall Propeller Fans (471755) User Manual
Page 3
Sidewall Propeller Fans
3
Fan
Size
Damper
Size
Square
Recommended Wall Opening (W.O.)
Square
M
Minimum
Filtered Supply Wall Housing Only
Figures 1 and 2
Figure 3
Figure 4
A
B
C
Filter Quantity & Size
8
10 (254)
14
1
⁄
4
(362)
10
1
⁄
2
(267)
-
6 (152)
-
-
-
-
10
12 (305)
16
1
⁄
4
(413)
12
1
⁄
2
(318)
-
6 (152)
-
-
-
-
12
14 (356)
19
1
⁄
4
(489)
14
1
⁄
2
(368)
-
7 (178)
-
-
-
-
14
16 (406)
21
1
⁄
4
(540)
16
1
⁄
2
(419)
-
8 (203)
-
-
-
-
16
18 (457)
23
1
⁄
4
(591)
18
1
⁄
2
(470)
-
9 (229)
-
-
-
-
18
20 (508)
25
1
⁄
4
(641)
20
1
⁄
2
(521)
-
10 (254)
-
-
-
-
20
22 (559)
27
1
⁄
4
(692)
22
1
⁄
2
(572)
-
12 (305)
-
-
-
-
24
26 (660)
33
3
⁄
4
(857)
26
1
⁄
2
(673)
33
3
⁄
4
(857)
13 (330)
32
1
⁄
4
(819)
63 (1600)
24 (610)
4
23
1
⁄
4
x 16
1
⁄
4
(591 x 413)
30
32 (813)
39
3
⁄
4
(1010)
32
1
⁄
2
(826)
39
3
⁄
4
(1010)
13 (330)
38
1
⁄
4
(972)
65 (1651)
26 (660)
4
24
5
⁄
8
x 19
1
⁄
4
(625 x 489)
36
38 (965)
45
3
⁄
4
(1162)
38
1
⁄
2
(978)
45
3
⁄
4
(1162)
14 (356)
44
1
⁄
4
(1124) 67
1
⁄
4
(1708)
28
1
⁄
4
(718)
6
23
1
⁄
4
x 22
1
⁄
8
(591 x 562)
42
44 (1118)
51
3
⁄
4
(1314)
44
1
⁄
2
(1130) 51
3
⁄
4
(1314)
15 (381)
50
1
⁄
8
(1273) 72
7
⁄
8
(1851)
34 (864)
6
24
1
⁄
8
x 25
1
⁄
8
(613 x 638)
48
50 (1270)
57
3
⁄
4
(1467)
50
1
⁄
2
(1283) 57
3
⁄
4
(1467)
16 (406)
56
1
⁄
8
(1426) 72
7
⁄
8
(1851)
34 (864)
12 23
1
⁄
4
x 18
3
⁄
4
(591 x 476)
54
56 (1422)
63
3
⁄
4
(1619)
56
1
⁄
2
(1435) 63
3
⁄
4
(1619)
17 (432)
62
3
⁄
8
(1584) 79
11
⁄
16
(2024) 40
11
⁄
16
(1033) 12 23
1
⁄
4
x 20
3
⁄
4
(591 x 527)
60
62 (1575)
69
3
⁄
4
(1772)
62
1
⁄
2
(1588)
-
19 (483)
-
-
-
-
72
74 (1880)
84
3
⁄
4
(2153)
74
1
⁄
2
(1892)
-
19 (483)
-
-
-
-
All dimensions given in inches
(millimeters). Filters are 2 inch (51 mm) nominal thickness. Above filter sizes are actual dimensions.
W.O.
W.O.
M
W.O.
Filters
Wall
Housing
Filter
Section
INTERIOR
W
all
EXTERIOR
Optional 90º
Weatherhood
Filters
Airflow
Optional
Damper
Wa
ll
A
C
B
24 in.
15 in.
Preinstallation Checks
• Check chart below for correct wall opening
dimensions.
• Check motor voltage and amperage rating for
compatibility with electrical supply. Supply wiring
must be properly fused and conform to local and
national codes.
• Motor load amperage must be checked and
compared to nameplate rating to avoid serious
damage to motor when speed is increased.
Wall Opening Requirements
Wall opening size and propeller-to-damper distance
are two important dimensions for fan installation.
Fans mounted to the wall require a different wall
opening (W.O.) size than those mounted in collars or
wall housings. Propeller-to-damper distance (M) is
important to reduce turbulence and damper flutter
which may lead to premature damper failure.
Figure 1 and 2 show the wall opening (W.O.) required
for installations with either a wall housing or collar.
Figure 3 shows the recommended wall opening (W.O.)
and the minimum distance (M) suggested between the
fan and damper for direct to wall installations.
Figure 4 shows the dimensions and wall opening
(W.O.) required for installations with a filtered supply
wall housing.
Figure 3 - Direct to Wall Installation
Figure 1 - Wall Housing Installation
Figure 2 - Wall Collar Installation
Figure 4 - Filtered Supply Wall Housing Installation
®