Hutdown Rocedure; Ecommended Imer Ettings - Farr Gold Series Installation, Operation And Maintenance Manual

400.9 Shutdown Procedure
1. Shutdown the process or dust generating operation to which the dust collector is installed.
2. Continue operation of the fan, dust removal device, and cleaning mechanisms for at least 20 minutes
to assure good removal of the collected dust. This will also purge much of the process moisture that
may be still in the collector.
3. Shut off the fan and perform the necessary lock-out/tag-out procedures.
4. If the cartridges are going to be replaced with this shutdown, it will be necessary to continue to pulse
the collector for an additional 20 minutes after the fan is shut down. This will assure that the
cartridges are clean and much lighter for removal. (Note – if the cartridges are not to be removed do
not pulse the unit after the fan is turned off, as this will remove the filter cake already formed on the
cartridges)
5. Close the compressed air line valve and perform the necessary lock-out/tag-out procedures.
6. Turn off power to the controller, discharge devices, or other electrical equipment. Perform the
necessary lock-out/tag-out procedures.
7. The collector is now ready for replacement of the cartridges, maintenance, or storage.
8. If the collector is located outside or is subject to condensation formation, install a heater or allow a
warm air stream to flow through the collector while it is shutdown.
400.10 Recommended Timer Settings
The following settings apply to any model timer that is shipped with a Gold Series Dust Collector. These
settings represent a recommended starting point and the optimum operation settings may vary for your
application.
Pulse Duration (on time)
Pulse Frequency (off time)
High DP Set Point
Low DP Set Point
High Alarm
If your system is set to operate on differential pressure cleaning then the cleaning system will automaticaly use the
minimum amount of compressed air to maintain stable operation of the dust collector. Adjusting the settings above
would only be necessary on the most aggressive applications. If your system is set to clean continuously then it
would be beneficial to take the time to adjust the settings to achieve stable operation with the least amount of
compressed air consumption. This will also result in longer cartridge life.
To optimize the cleaning system operation for continuous cycle cleaning perform the following procedure:
1. Make sure the timer is set at the recommended settings above at start up.
2. Monitor the pressure on the collector for 4 weeks. If the pressure is less than 2 in wg after this period the
cleaning system can be adjusted to reduce air consumption.
3. Increase the pulse frequency by 2 seconds or reduce the pulse duration by 10 milliseconds.
4. Repeat steps 2 and 3 until the dust collector stabilizes at 2 to 3 in wg.
Note, these adjustments may have to be reversed as the filters age.
CAUTION: Over cleaning the cartridges will result in higher emissions, shorter cartridge life, and higher
energy costs.
150 milliseconds Increasing this will increase the cleaning energy to the filters and
consume more compressed air. Decreasing this value will have the
opposite affect. You would increase this value if your application
involves high dust loads and dust that does not easily release from the
cartridge. On applications with light dust loads this value can be
reduced to conserve compressed air.
15 seconds Increasing this value will decrease compressed air consumption.
Decreasing this value will increase compressed air consumption. You
would decrease this value if your application involves high dust loads
and dust that does not easily release from the cartridge. On
applications with light dust loads this value can be increased to
conserve compressed air.
3 in wg Initiates differential pressure cleaning.
2 in wg Stops differential pressure cleaning.
6 in wg This value will protect the cartridges from damage due to high
differential pressures.
50