Greenheck G Manual page 23

Roof Downblast Exhaust
Belt & Direct Drive
GB-121 • G-123
24 3 ⁄
8
(619)
19
(483)
Damper Size = 12 x 12
(305 x 305)
Roof Opening = 14½ x 14½
(368 x 368)
Shroud Thickness = 0.051
(1.3)
Motor Cover Thickness = 0.040
Curb Cap Thickness = 0.064
(1.6)
^Approximate Unit Weight G/GB = 58/66 lbs.
All dimensions in inches (millimeters). *May be greater depending on
motor. ^Weight shown is largest cataloged Open Drip-Proof motor.
Motor HP
Fan
Belt Direct RPM
121 123
580
VG-
720
1/2
C-1/8 860
1/4 1000
B-1/6 1140
1265
1395
1475
1/3
1550
1635
1/2
A-1/2 1725
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.
3 ⁄
*23
4
(603)
4 3 ⁄
(111)
8
1 3 ⁄
(44)
4
(1.0)
(26/30 kg)
0 0.125 0.25
704 515
CFM
0.02 0.02
BHP
3.2 3.3
Sones
873 735 523
CFM
BHP 0.03 0.04 0.04
Sones 4.2 4.3 4.1
CFM 1043 932 796
BHP 0.05 0.06 0.06
Sones 5.4 5.5 5.2
1213 1119 1013
CFM
0.08 0.09 0.09
BHP
6.7 6.8 6.7
Sones
1383 1300 1213
CFM
0.12 0.13 0.14
BHP
8.4 8.4 8.4
Sones
CFM 1535 1460 1384
BHP 0.16 0.17 0.18
Sones 10.2 10.1 10.1
CFM 1692 1625 1557
BHP 0.21 0.23 0.24
Sones 12.5 12.4 12.3
1789 1726 1661
CFM
0.25 0.27 0.28
BHP
13.5 13.4 13.3
Sones
1880 1820 1759
CFM
0.29 0.31 0.32
BHP
14.6 14.5 14.3
Sones
CFM 1983 1926 1868
BHP 0.34 0.36 0.37
Sones 15.9 15.8 15.6
CFM 2093 2038 1984
BHP 0.40 0.42 0.44
Sones 17.4 17.2 17.0
Volume (cfm)
3
Volume (m /hr )
Direct Drive RPM
C-860- B-1140-
RPM RPM
Static Pressure in Inches wg
0.375 0.5 0.625 0.75
MAXIMUM BHP AT A GIVEN RPM = (RPM/2170)
MAXIMUM RPM = 1725
TIP SPEED (ft/min) = RPM x 3.420
MAXIMUM MOTOR FRAME SIZE = 56
580
0.06
5.2
883 694
0.10 0.09
6.4 6.4
1112 993 831
0.14 0.14 0.14
8.1 7.9 7.8
1299 1204 1093 950
0.19 0.19 0.20 0.19
9.9 9.7 9.6
1484 1404 1315 1214
0.25 0.26 0.26 0.26
12.2 12.0 11.7 11.5
1594 1521 1441 1356
0.29 0.30 0.31 0.31
13.2 13.0 12.7 12.4
1696 1629 1555 1475
0.33 0.34 0.35 0.36
14.2 14.0 13.8 13.5
1810 1747 1680 1608
0.39 0.40 0.41 0.42
15.4 15.3 15.0 14.8
1928 1871 1810 1743
0.45 0.46 0.47 0.48
16.8 16.7 16.4 16.2
RPM (Belt)
RPM (Direct)
RPM (Vari-Green)
HP
3
Density 0.075 lb/ft
3
Density 1.2 kg/m
A-1725- VG-1725-
RPM RPM
1 1.25 1.5
3
9.4
907
0.24
11.3
1132
0.31
12.0
1289 974
0.36 0.33
12.9 12.4
1446 1231
0.43 0.41
13.9 13.4
1600 1426 1180
0.50 0.50 0.47
15.5 14.9 14.0
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