Greenheck Fan Centrifugal Roof Downblast Exhaust Fans GB - Manual (Page 13)

13
VG = Vari-Green ®
(Direct Drive only)
Motor HP (Belt Drive only)
6 = 1/6 10 = 1 50 = 5
4 = 1/4 15 = 1½ 75 = 7½
3 = 1/3 20 = 2 100 = 10
5 = 1/2 30 = 3 150 = 15
7 = 3/4
Motor RPM (Direct Drive only)
A = 1725 D = 1550
B = 1140 E = 1050
C = 860 G = 1300
International
(See CAPS for performance)
K = 950 RPM J = 1475 RPM
Fan Inlet Connections
In order to assure proper fan performance, caution
must be exercised in fan placement and connection
to the ventilation system. Obstructions, transitions,
poorly designed elbows, improperly selected
dampers, etc., can cause reduced performance,
excessive noise, and increased mechanical stress.
For performance to be as published, the system must
provide uniform and stable airflow into the fan.
Provide uniform airflow at fan inlet to assure
optimum performance.
Provide uniform airflow at fan inlet and through
the damper to assure optimum performance.
Dampers must open fully. Use motorized
dampers in low airflow applications to
reduce losses.
Avoid sharp turns or entrance conditions which
cause uneven flow. Use turning vanes in elbows
to reduce adverse effects.
Typical Installations
Models G and GB
Good
Good
Poor Poor
A
C D
B
Model Number Code
The model number code system is designed to completely identify the fan. The correct code letters
must be specified to designate belt or direct drive. The remainder of the model code is determined by
the size and performance.
A
C
D
B
Fan Size
060 through 540
Wheel Pressure Level
HP - High Pressure
GB - 240 HP - VG / 5 / A - X
Configuration
G - Direct Drive
GB - Belt Drive
X = UL 705
F = UL Smoke
Control Systems