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Conveying System Mechanical Components Chapter 3: Installation 77 of 138
Adjusting Air Pulse Duration: All Models
Locate the on-time potentiometer inside the control enclosure on the circuit board. With the
unit operating, turn the potentiometer counterclockwise to shorten the air pulse duration; turn
clockwise to lengthen the air pulse.
ACA Series Filter Chamber Pre-Operation Checklist
Check the following before you operate ACA Series filter chambers:
1. Make sure all mechanical installations are complete.
2. Make sure all electrical and compressed air connections are complete and correct.
3. Make sure that no leaks are present in the filter chamber housing. Check stretcher
clamps for tightness.
Adjusting Time Between Air Pulses on ACA Filters
Models 91/93, 151/153, and 251/253
The time between cleaning air pulses requires adjusting to match up with dusting
characteristics of the material being conveyed. If more dusting occurs, then more frequent
compressed air pulses are required to clean filter bags.
Locate the off-time control potentiometer inside the control enclosure and adjust from 0- to
30-second intervals between air pulses to match material conveying characteristics.
Adjusting the Number of Air Pulses
Model 51/53 Low Boy
Locate the DIP switch inside the blowback control box. Set the DIP switch to the number of
pulses you want from 1 to 16, using the DIP switch settings shown in the following figure.
The diagram is also shown on the blowback control box electrical schematic located in your
Customer Service Packet.
Figure 41: ACA Series Model 50 Blowback DIP Switch Settings
ONONONON
1
OPENOPENOPENOPEN
1 2 3 41 2 3 41 2 3 4432
16 PULSES
15 PULSES
14 PULSES
13 PULSES
ONONON
OFF
ON
OFFOFFOFF
ON ON ON ON
ONONONON
ONONON
OFFOFFOFF OFFOFF
ON
OFFOFF OFF
ON ON ON
9 PULSES
10 PULSES11 PULSES12 PULSES
1 2 3 4 4321 4321 4321
OPEN OPEN OPEN OPEN
OFFOFF
ON
OFF OFFOFF
ON
OFFOFF OFF
ON ON ON
5 PULSES6 PULSES
7 PULSES8 PULSES
1 2 3 4 4321 4321 4321
OPEN OPEN OPEN OPEN
OPENOPENOPENOPEN
1 2 3 41 2 3 41 2 3 44321
4 PULSES 3 PULSES 2 PULSES
1 PULSE
ONONON
OFFOFFOFF OFFOFF
ON
OFFOFFOFFOFFOFFOFFOFF
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