Donaldson Company, Inc.
24
CAUTION!
BEFORE INITIAL OPERATION:
Tighten all set screws in fan wheel.*
Tighten all set screws in bearings.*
Repeat after 8 hours of operation.
Repeat again after two weeks of
operation.
Reference Wheel Setscrew Torque Table
below.
R- R-F0 X*F0
HPYSLWHREHIRIHVELXSRIVEW[IVGWXIWPIIXWWWIPRMEX7
WIYPEZILXJSJPELRELXIVSQSXHIRIXLKMXIFXSR
R[SLW
Wheel Setscrew Torque
Optional Equipment
Power Pack
The two types of power packs, Torit Backward
Incline, TBI, and Torit Radial Blade, TRB, are
installed following the same procedure. Both power
packs are designed to fit on the top or side of the
Downflo II.
Note: The use of a damper is required to control
airflow through unit. Lack of a control
damper will shorten filter life.
1. The power packs are shipped assembled and
partial disassembly is required before installing.
2. Mark the motor mount location on the housing
before removing motor assembly on 30 Hp, 60
Hz and 20 and 30 Hp, 50 Hz units. It is not
necessary to mark location on other motors.
Remove eight motor-mount bracket fasteners
and remove the motor, motor-mount bracket,
and fan wheel as an assembly as shown.
3. Turn housing over and apply sealant to the
outside edge of the bolt pattern on the fan
housing. Mount the fan housing to the collector
using the fasteners supplied.
Notes: For a top-mounted TBI, or a TRB with
a blast-gate style damper, install a spacer ring
between the fan housing and the collector to
provide the necessary clearance for the
damper installation.
For top-mount TBI with explosion vent,
install the spacer spool between the blower
housing and the collector to provide the
necessary clearance for explosion vent and
weather dome. Position of the blower fan
housing should not restrict explosion vent
opening.
4. Apply sealant to the outside edge of the bolt
pattern on the fan housing. Reinstall the motor,
bracket, and fan wheel assembly. Align motor
mount bracket to the mark on the housing on 30
Hp, 60 Hz and 20 and 30 Hp, 50 Hz units.
Other motor sizes do not require alignment, but
consider the electrical connection location.
5. Rotate fan wheel after installation to ensure
proper clearance between the inlet cone and the
fan wheel.
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