Pre-installation checks, Wall opening requirements – Greenheck Fan PN 471755 User Manual
Page 3
Sidewall Propeller Fans • Exhaust, Supply and Filtered Supply
®
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)
141/4 (362)
10½ (267)
-
6 (152)
-
-
-
-
10
12 (305)
161/4 (413)
12½ (318)
-
6 (152)
-
-
-
-
12
14 (356)
191/4 (489)
14½ (368)
-
7 (178)
-
-
-
-
14
16 (406)
211/4 (540)
16½ (419)
-
8 (203)
-
-
-
-
16
18 (457)
231/4 (591)
18½ (470)
-
9 (229)
-
-
-
-
18
20 (508)
251/4 (641)
20½ (521)
-
10 (254)
-
-
-
-
20
22 (559)
271/4 (692)
22½ (572)
-
12 (305)
-
-
-
-
24
26 (660)
333/4 (857)
26½ (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) 393/4 (1010)
32½ (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) 453/4 (1162)
38½ (978)
45
3
⁄
4
(1162) 14 (356) 44
1
⁄
4
(1124) 67
1
⁄
4
(1708)
281/4 (718)
6
23
1
⁄
4
x 22
1
⁄
8
(591 x 562)
42 44 (1118) 513/4 (1314) 44½ (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) 573/4 (1467) 50½ (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) 633/4 (1619) 56½ (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) 693/4 (1772) 62½ (1588)
-
19 (483)
-
-
-
-
72 74 (1880) 843/4 (2153) 74½ (1892)
-
19 (483)
-
-
-
-
All dimensions given in inches (millimeters). Filters are 2 inch (51 mm) nominal thickness. Above filter sizes are actual dimensions.
M
W.O.
W.O.
W.O.
M
W.O.
W.O.
W.O.
Figure 1 - Wall Housing Installation
Figure 2 - Wall Collar Installation
Figure 3 - Direct to Wall Installation
Figure 4 - Filtered Supply Wall Housing Installation
M
W.O.
W.O.
W.O.
Filters
Wall
Housing
Filter
Section
INTERIOR
W
all
EXTERIOR
Optional 90º
Weatherhood
Filters
Airflow
Optional
Damper
W
all
A
C
B
24 in.
15 in.
Pre-Installation 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.