Greenheck G Manual page 19

Roof Downblast Exhaust
Belt & Direct Drive
GB-081 • G-098
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 = 54/60 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
081 098
720
VG-
790
1/4
C-1/8 860
930
1000
1/6
1070
B-1/6 1140
1315
1490
1670
1/4 A-1/4 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)
(24/27 kg)
0 0.125 0.25
361 272
CFM
0.01 0.01
BHP
3.0 2.7
Sones
396 315 181
CFM
BHP 0.02 0.02 0.02
Sones 3.5 3.2 3
CFM 431 358 261
BHP 0.02 0.02 0.02
Sones 4.0 3.7 3.4
466 399 323
CFM
0.03 0.03 0.03
BHP
4.6 4.4 4.0
Sones
501 439 372
CFM
0.03 0.04 0.04
BHP
5.3 5.1 4.7
Sones
CFM 536 478 416
BHP 0.04 0.04 0.05
Sones 5.9 5.8 5.4
CFM 571 517 460
BHP 0.05 0.05 0.06
6.6 6.5 6.1
Sones
659 612 564
CFM
0.08 0.08 0.08
BHP
8.3 8.1 7.8
Sones
746 706 663
CFM
0.11 0.12 0.12
BHP
10.1 9.9 9.8
Sones
CFM 836 800 763
BHP 0.16 0.16 0.16
Sones 12.0 11.9 11.7
864 829 793
CFM
BHP 0.17 0.18 0.18
Sones 12.7 12.5 12.3
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/2985)
MAXIMUM RPM - GB-081=1710, G-098=1725
TIP SPEED (ft/min) = RPM x 2.929
MAXIMUM MOTOR FRAME SIZE = 56
259
0.04
4.4
338
0.05
5.0
396 283
0.06 0.05
5.7 5.5
513 456 362
0.09 0.09 0.08
7.4 7.0 6.9
621 574 525 452
0.12 0.12 0.12 0.12
9.3 8.9 8.6
725 686 645 603
0.17 0.17 0.17 0.17
11.4 11.0 10.7 10.4
756 719 679 640
0.18 0.19 0.19 0.19
12.1 11.7 11.4 11.1
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
0.875 1 1.125
353
0.11
8.5 8.4
550 466 377
0.18 0.17 0.16
10.1 10.0 9.9
592 527 441
0.19 0.19 0.18
10.8 10.6 10.5
3
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