52
Figure 30 - Supply Fan Banding
For single set screw applications, tighten the
set screw to the required torque setting (Table
12) using a calibrated torque wrench. For
double set screw applications, tighten one set
screw to half of the required torque setting
(Table 12) using a calibrated torque wrench.
Tighten the second set screw to the full
required torque setting then tighten the first
set screw to the full required torque setting.
Table 12 - Plenum Fan Set Screw
Specifications
The gap tolerances that are allowed between
the blower and the inlet cone for the plenum
fan blowers are shown in Figure 31. The inlet
cone can be moved as necessary to center the
cone in relation to the blower. The blower can
be moved on the motor shaft to set the correct
overlap. These tolerances are critical to the
performance of the blower.
Figure 31 - Plenum Fan Gap Tolerances
Power Return Axial Flow Fans (16-25 and
30 tons)
Blade Pitch Angle Setting Instructions
Step 1: Determine the new required pitch for
the fan blades
Use the fan program in AAON ECat.
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