AAON RZ Series, Installation Operation & Maintenance

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band ends together. Caution must be taken to
assure that the band is tightly installed and no
damage, denting or alteration to the wheel or
blades occurs during the installation.
Figure 21 - Air Volume Band Tab Locations
Figure 22 - Securing Air Volume Band Ends
For single set screw applications, tighten the
set screw to the required torque setting (
Table
8
) using a calibrated torque wrench. For
double set screw applications, tighten one set
screw to half of the required torque setting
(
Table 8
) 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 8 - Plenum Fan Set Screw Specifications
SET SCREW
DIAMETER
TORQUE (IN-
LBS)
1/4" 80
5/16" 126
3/8" 240
7/16" 384
1/2" 744
9/16" 1,080
5/8" 1,500
3/4" 2,580
7/8" 3,600
1" 5,400
The gap tolerances that are allowed between
the blower and the inlet cone for the RZ
plenum fan blowers are shown in Figure
23 .
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 23 - Plenum Fan Gap Tolerances