AAF International ArrestAll - Manual (Page 4)

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5.0 Operation
The primary function of the AR ArrestAll dust collector is to move air,
and thus create suction and remove the dust from the air . As a dust
cake develops on the fabric surface of the filter, pressure drop will rise
and airflow will be reduced. The unit must be shaken with sufficient
frequency to preclude significant loss of suction.
Frequency of the dust removal from the bin should be determined
from experience and an appropriate maintenance cycle established.
Because of the intensity of shaking, it is imperative that the door be
properly latched to prevent leakage.
With the hand-off-auto switch, the frequency of shaking can be
controlled by the owner. It is recommended that shaking be minimized
to extend the life of the filter cartridge and mechanical components.
This is especially pertinent to installations where the unit might be
turned on and off numerous times during the day, such as a school
woodworking shop. In the “AUTO” position, the unit shakes every time
the unit is turned off. In the “OFF” position, shaking can be actuated
anytime the switch is pushed toward the “HAND” position. The fan
must always be turned off before shaking.
The duration of the shaking process is adjustable from 0.6 to 60
seconds (recommended time set at approximately 15-20 seconds)
with an initial fan coast delay which is adjustable from 0.6 to 20
seconds (recommended time factory set at 20 seconds).
For cold weather applications, it is especially important to allow the
collector to operate for an extended period of time before shaking.
6.0 Maintenance
6.1 Fan and Motor Replacement
Fan and/or motor replacement requires removal of the fan from
the top plate. Lock out electrical power to the motor . Remove the
mounting bolts and lift the fan assembly away. By removing the
appropriate bolts, the fan wheel can be removed and replaced.
The fan wheel must be removed for motor replacement. A wheel
puller may be required for replacement of the fan wheel.
Shaker Motor Replacement
Steps: (Figure 8)
1. Remove motor terminal cover and disconnect wires. Remove cable
connector and wires from the motor.
2. Loosen bearing locking collar as follows:
a. Loosen set screw.
b. Rotate bearing so that the hole without the set screw faces you.
Place a punch in hole and sharply tap punch in a CCW direction.
If collar doesn’t loosen, sharply tap in a CW direction to loosen.
(Repeat if necessary.)
3. Loosen and remove motor mounting bolts.
4. Lift and remove motor. Eccentric (on motor shaft) should
disengage from bore of bearing. Bearing will remain in flanges.
5. Remove eccentric from shaft by loosening two (2) set screws.
To reinstall, reverse above procedure.
Note: Install motor with electrical terminals accessible.
After reinstalling all parts, rotate bearings several turns by hand to
insure equally free movement throughout rotation.
6.2 Lubrication
Follow the motor manufacturer’s recommendations for lubrication
procedures for the fan and shaker motor.
Figure 8. Shaker Motor Replacement
2b
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Shaker Box (Ref.)
Shaker
Motor
(Ref.)
2a
3
1
5