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Typical Installations
For units supplied or used with a Variable Frequency Drive (VFD), reference the VFD documentation for
installation requirements, start-up settings, parameter adjustments and trouble shooting. VFDs provided by
Greenheck are factory programmed for basic motor parameters, incoming voltage parameters and maximum
operating speed (Hz).
Follow NEC and local codes for VFD wiring and installation. If the wire length between the VFD and the controlled
motor exceeds 100 ft (30.5 m), DV/DT filters or VFD cabling may be required. Calculations and proper application
of DV/DT filters and VFD cabling is by others; failing to do so may result in premature motor failure.
With Mounting Brackets
Following are typical mounting installations for models
with mounting brackets. Diagrams show dimensions for
ceiling hung installations. The dimensions for floor or
base mount installations are mirror images of these.
For TBI models with motor in the 3 or 9 o'clock position
or vertical installations, additional mounting rails are
recommended. Mounting rail dimensions are shown for
field fabrication.
Horizontal
A
Vertical
D
A
Optional
Mounting
Rails
®
B
B
Motor at 3 or 9 o'clock position
C
Optional
Mounting
Rails
NOTE
Fan
Belt
Size
Drive
18
17.63
20
19.00
24
21.88
30
26.13
36
30.50
42
34.75
D
48
42.00
C
A
54
46.75
60
51.00
Optional
Mounting
Dimensions shown are in inches.
Rails
To determine unit level, refer to the fan nameplate.
Example TBI-3L42 (level 3) or TBI-4H30 (level 4)
Continuous Duty and Emergency Exhaust
TBI-FS with optional high temperature construction
are factory-modified for operation in high temperature
continuous duty applications. With propeller on the
discharge end of the fan, negative pressure is created in
the belt tube during operation. Ambient air is drawn in
through the belt tube and cools the belts and bearings.
For the greatest amount of internal cooling, discharge
static pressure should be kept to a minimum while
keeping most of the pressure on the inlet side. Locate
Roof
Duct to heat source
Airflow
Cooling air for
drives and
bearings
Wall and/or ceiling should enclose
fan when used for emergency heat
and smoke exhaust.
Mounting Hole Locations
A
B
Belt Drive
Direct Drive
Direct
Level
Level
Level
Direct
3
4/5
17.63
17.38
21.38
13.38
19.00
17.38
22.38
14.38
21.88
18.38
23.38
14.38
26.13
19.38
28.38
16.38
30.50
21.88
26.88
13.88
34.75
22.88
31.88
19.88
42.00
25.38
C
36.38
19.38
46.75
29.88
40.38
NA
51.00
32.38
41.38
NA
Optional
Mounting
Rails
Ambient temperature
not to exceed 120°F
Minimum duct
at discharge
C
D
Belt
Belt
Level
Drive
Drive
3
4/5
21.38
26.00
28.00
21.38
28.50
29.25
21.38
33.00
33.75
25.88
37.00
38.75
23.38
44.00
47.00
26.38
50.00
51.25
31.38
56.00
61.00
31.38
62.00
65.50
31.38
71.00
70.00
the fan at ends of
the duct runs and
near the discharge
point in the system.
This set-up will
promote the ambient
air cooling effect.
Tubular Inline Fans
5
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