Greenheck G Manual page 28

Roof Downblast - Belt Drive Roof Downblast - Exhaust
Size- : GB • H-GB Belt Drive
GB-161HP
28 3 ⁄
8
(721)
22
(559)
Damper Size = 16 x 16
(406 x 406)
Roof Opening = 18½ x 18½
Shroud Thickness = 0.051
Motor Cover Thickness = 0.040
Curb Cap Thickness = 0.064
^Approximate Unit Weight = 88 lbs.
All dimensions in inches (millimeters). *May be greater depending on motor.
^Weight shown is largest cataloged Open Drip-Proof motor.
Motor Fan
HP RPM
161HP
CFM
825 BHP
Sones
CFM
1/4 960
BHP
Sones
CFM
1095
BHP
Sones
CFM
1/3 1210 BHP
Sones
CFM
1270
BHP
Sones
CFM
1/2 1330
BHP
Sones
CFM
1390
BHP
Sones
CFM
1485 BHP
Sones
3/4
CFM
1580
BHP
Sones
CFM
1660
BHP
Sones
1
CFM
1740
BHP
Sones
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.
28
3 ⁄
*23
4
(603)
4
(102)
1 3 ⁄
(44)
4
(470 x 470)
(1.3)
(1.0)
(1.6)
(40 kg)
0.5 0.625 0.75
702
0.11
6.5
1093 919 585
0.18 0.17 0.15
7.7 7.6 8.0
1380 1271 1139
0.26 0.26 0.26
9.0 9.0 8.9
1606 1514 1416
0.34 0.35 0.35
10.6 10.3 10.4
1718 1636 1545
0.39 0.40 0.40
11.4 11.2 11.1
1829 1753 1668
0.44 0.45 0.46
12.3 12.1 11.9
1938 1865 1789
0.50 0.51 0.52
13.3 13.0 12.8
2109 2041 1973
0.60 0.61 0.63
14.9 14.7 14.4
2275 2214 2150
0.72 0.73 0.75
16.7 16.7 16.4
2414 2357 2297
0.82 0.84 0.85
18.3 18.8 18.3
2551 2497 2442
0.94 0.96 0.97
20 21 21
Static Pressure in Inches wg
1 1.25 1.5
MAXIMUM BHP AT A GIVEN RPM = (RPM/1708)
TIP SPEED (ft/min) = RPM x 4.352
MAXIMUM MOTOR FRAME SIZE = 145T
589
0.21
9.5
1149
0.34
10.3
1333 949
0.41 0.37
11.1 11.4
1483 1204
0.47 0.45
12.1 12.0
1619 1399 1032
0.53 0.53 0.48
12.7 12.7 13.1
1822 1654 1416
0.64 0.65 0.63
13.8 13.7 14.0
2016 1868 1704
0.77 0.77 0.791
15.5 14.7 14.8
2175 2037 1887
0.89 0.89 0.91
16.7 16.2 15.8
2325 2200 2066
1.01 1.03 1.03
18.4 17.5 17.2
RPM (Belt)
HP
Density 0.075 lb/ft
Density 1.2 kg/m
Volume (cfm)
3
Volume (m /hr)
1.75 2 2.25
MAXIMUM RPM = 1740
1012
0.57
14.7
1447 1034
0.75 0.67
15.4 16.6
1702 1441 996
0.90 0.86 0.75
15.8 17.1 20
1917 1714 1452
1.05 1.03 0.98
16.8 17.2 19.2
3
3
2.5
3
987
0.85
28