9
Donaldson Company, Inc.
Duct Connections and Support
Any duct or attenuator/silencer should have independent
support. Do not use the fan to support duct or attenuator/
silencer. Isolating the fan from duct with flex connections
reduces transmission of vibration.
Fans handling hot gases must be rated for operation
at the gas temperature and require expansion joints at
both the inlet and discharge to prevent excessive loads
caused by thermal growth.
Fan Without Spool Piece
The following instructions are for a TBI fan without a
spool piece being mounted to a Donaldson Torit dust
collector.
1. Apply the sealer, furnished in the installation
hardware kit, around clean air outlet opening of the
collector. Sealer should be applied in a Figure 8 type
pattern around each bolt hole so that inlet is sealed
from both the outside and the inside of the bolt hole.
2. If the fan does not already have match marking
arrows, match-mark the motor mounting plate with
the fan housing so they can be reassembled in the
original position later in Step 6.
3. Remove the motor/wheel assembly from the fan
housing. Do not remove the wheel from the motor
shaft.
4. Position the fan housing onto the collector surface
with the fan inlet against the collector. Align the
mounting holes. Position the discharge to be free of
obstructions and locate so that the motor’s electrical
box will be positioned for wiring convenience.
5. Bolt the fan housing to the collector surface using
the hardware supplied. Put Loctite on the nut surface
that will come in contact with the inside surface of
the clean air plenum.
6. Apply sealer on the fan housing. Reinstall the motor/
wheel assembly onto the housing in the original
position as indicated in Step 2.
7. Inspect the installation prior to starting the fan.
Check for any loose items or debris that could be
drawn into the fan or dislodged by the air discharged
from the fan outlet. Check the interior of the fan as
well. Turn the wheel by hand to check for binding
8. Complete the electrical connections in accordance
with NEC code and state and local requirements.
“Bump” the starter to make sure motor is rotating in
the proper direction. (Standard TBIs are clockwise
rotation as viewed from the motor endbell.)
