Roof downblast - exhaust belt drive gb-220hp – Greenheck Fan Centrifugal Roof Downblast Exhaust Fans GB User Manual
Page 34
34
Roof Downblast - Exhaust
Belt Drive
GB-220HP
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 = 24 x 24
(610 x 610)
Roof Opening = 26½ x 26½
(673 x 673)
Shroud Thickness = 0.064
(1.6)
Motor Cover Thickness = 0.040
(1.0)
Curb Cap Thickness = 0.064
(1.6)
^Approximate Unit Weight = 186 lbs.
(84 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
S
E
L
E
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
5
3
⁄
4
(146)
*31
1
⁄
2
(800)
34
(864)
Motor
HP
Fan
RPM
Static Pressure in Inches wg
0.5
0.625
0.75
1
1.25
1.5
1.75
2
2.25
2.5
220HP
1/2
650
CFM
2952
2555
1892
BHP
0.47
0.46
0.42
Sones
8.9
8.5
8.3
680
CFM
3215
2871
2440
BHP
0.53
0.53
0.52
Sones
9.4
9.2
8.9
3/4
728
CFM
3614
3312
2974
BHP
0.65
0.65
0.65
Sones
10.6
10.3
9.9
775
CFM
3973
3719
3424
2643
BHP
0.77
0.79
0.79
0.75
Sones
12.0
11.5
11.1
10.5
1
850
CFM
4532
4317
4083
3536
2648
BHP
1.00
1.02
1.04
1.03
0.95
Sones
15.0
13.8
13.5
12.7
12.0
1
1
⁄
2
913
CFM
4975
4791
4590
4119
3545
2557
BHP
1.22
1.25
1.27
1.29
1.27
1.13
Sones
16.7
16.0
15.3
14.4
13.5
13.0
975
CFM
5400
5245
5060
4660
4185
3602
BHP
1.46
1.50
1.53
1.57
1.56
1.53
Sones
18.7
18.2
17.5
16.3
15.4
14.8
2
1025
CFM
5740
5591
5432
5075
4643
4157
3492
BHP
1.68
1.72
1.76
1.81
1.82
1.804
1.74
Sones
21
20
19.4
18.2
17.1
16.4
15.6
1075
CFM
6076
5935
5794
5459
5082
4649
4136
3346
BHP
1.93
1.97
2.01
2.06
2.10
2.10
2.07
1.93
Sones
23
22
21
20
18.7
18.3
17.7
16.4
3
1127
CFM
6422
6289
6154
5852
5520
5124
4703
4173
3299
BHP
2.20
2.24
2.29
2.36
2.41
2.42
2.41
2.37
2.17
Sones
24
24
23
22
21
20
19.3
18.6
17.7
1230
CFM
7100
6981
6858
6611
6316
6009
5649
5263
4812
4265
BHP
2.82
2.87
2.92
3.01
3.08
3.14
3.15
3.14
3.10
3.02
Sones
28
27
27
27
25
25
23
22
22
22
MAXIMUM BHP AT A GIVEN RPM = (RPM/838)
3
MAXIMUM RPM = 1230
TIP SPEED (ft/min) = RPM x 6.414
MAXIMUM MOTOR FRAME SIZE = 184T
42
3
⁄
4
(1086)