Roof downblast - exhaust belt drive gb-360 – Greenheck Fan Centrifugal Roof Downblast Exhaust Fans GB User Manual
Page 41
41
Roof Downblast - Exhaust
Belt Drive
GB-360
Performance certified is for installation type A: Free inlet, Free outlet. Power rating (BHP) does not include transmission losses. Performance ratings include the effects
of a birdscreen. The sound ratings shown are loudness values in hemispherical sones at 5 ft. (1.5 m) in a hemispherical free field calculated per AMCA Standard 301.
Values shown are for installation type A: free inlet hemispherical sone levels.
Performance certified is for installation type A: Free inlet, Free outlet. Power rating (BHP) does not include transmission losses. Performance ratings include the effects
of a birdscreen. The sound ratings shown are loudness values in hemispherical sones at 5 ft. (1.5 m) in a hemispherical free field calculated per AMCA Standard 301.
Values shown are for installation type A: free inlet hemispherical sone levels.
1
3
⁄
4
(44)
Damper Size = 36 x 36
(914 x 914)
Roof Opening = 38½ x 38½
(978 x 978)
Shroud Thickness = 0.080
(2.0)
Motor Cover Thickness = 0.064
(1.6)
Curb Cap Thickness = 0.080
(2.0)
^Approximate Unit Weight = 415 lbs.
(188 kg)
All dimensions in inches (millimeters). *May be greater depending on
motor. ^Weight shown is largest cataloged Open Drip-Proof motor.
DO
N
O
T
SE
LE
C
T
T
O
T
H
E
L
E
F
T
O
F
T
H
IS
S
Y
S
T
E
M
C
U
R
V
E
Static Pr
essur
e (in. wg)
Static Pr
essur
e (Pa)
Volume (cfm x 1000)
3
Volume (m /hr x 1000)
RPM
(Belt)
HP
Density 0.075 lb/ft
3
Density 1.2 kg/m
3
58
3
⁄
4
(1492)
8
7
⁄
8
(225)
*38
1
⁄
2
(978)
46
(1168)
Motor
HP
Fan
RPM
Static Pressure in Inches wg
0
0.125
0.25
0.375
0.5
0.625
0.75
1
1.25
1.5
360
1/2
300
CFM
8024
7070
5804
BHP
0.40
0.43
0.44
Sones
7.6
6.6
5.6
325
CFM
8693
7830
6756
5001
BHP
0.51
0.54
0.56
0.51
Sones
8.7
7.7
6.8
5.6
3/4
365
CFM
9763
9024
8109
7013
BHP
0.72
0.76
0.79
0.78
Sones
10.8
10.0
8.9
7.9
1
410
CFM
10966
10330
9558
8686
7641
BHP
1.02
1.07
1.11
1.12
1.11
Sones
13.7
13.3
11.9
10.9
9.6
1
1
⁄
2
460
CFM
12304
11737
11085
10360
9568
8607
7096
BHP
1.45
1.50
1.55
1.58
1.59
1.56
1.46
Sones
15.9
15.6
14.8
14.1
13.1
12.1
10.9
2
483
CFM
12919
12379
11776
11109
10355
9517
8488
BHP
1.67
1.73
1.78
1.82
1.83
1.83
1.78
Sones
17.0
16.7
16.1
15.5
14.8
13.7
12.9
505
CFM
13507
12991
12431
11795
11096
10368
9473
BHP
1.91
1.97
2.02
2.07
2.09
2.10
2.07
Sones
18.1
17.8
17.3
16.8
16.5
15.5
14.7
3
543
CFM
14524
14043
13551
12959
12350
11679
10965
8917
BHP
2.38
2.44
2.5
2.55
2.59
2.60
2.60
2.46
Sones
20
19.8
19.4
18.9
18.6
17.8
16.9
15.6
580
CFM
15513
15064
14614
14077
13523
12917
12289
10813
BHP
2.90
2.96
3.03
3.09
3.14
3.17
3.18
3.13
Sones
22
22
22
21
21
20
19.1
17.6
5
633
CFM
16931
16519
16107
15654
15146
14639
14072
12892
11465
BHP
3.77
3.84
3.91
3.98
4.04
4.10
4.12
4.13
4.05
Sones
26
25
25
24
24
23
23
21
19.7
685
CFM
18322
17941
17560
17179
16711
16243
15774
14710
13535
12119
BHP
4.77
4.85
4.93
5.01
5.07
5.14
5.20
5.23
5.21
5.10
Sones
30
30
29
29
28
28
26
24
23
22
MAXIMUM BHP AT A GIVEN RPM = (RPM/394)
3
MAXIMUM RPM = 685
TIP SPEED (ft/min) = RPM x 9.425
MAXIMUM MOTOR FRAME SIZE = 215T