KSI Seed Filtration, Owner'S/Operator'S Manual

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30
KSi SEED FILTRATION
USER'S MANUAL
5 – Operation
Air Purge Operation
Differential Pressure Timer Operation
The digital timer is designed to control the pulse valve on the dust filter. It provides timed sequential
energization of the pilot solenoid valves. The number of outputs is programmable for the quantity of
solenoid valves installed in the timer enclosure. LED indicators are provided for visual indication of which
valve is energized. A digital three position LED readout is provided to indicate the programmed settings of
the various functions. Digital controls allow adjustment of the “on” and “off” time, the total number of
outputs to be energized and the number of blowdown cycles required. Timer is equipped with integral
surge suppression on power input and solenoid load outputs to protect against voltage spikes. The timer
will retain programmed settings if input power is removed for any reason.
Automatic Blowdown
The automatic blowdown feature allows the timer to continue to operate for a programmed number of
complete cycles after the baghouse fan is turned off. The blowdown cycle is initiated by the opening of the
auxiliary contact on the fan motor starter when the fan is stopped. The number of blowdown cycles is
programmable from 0 to 25. When the programmed number of cycles is completed, the timer turns itself
off. The timer will automatically start when the baghouse fan is restarted if the blowdown terminals B1 & B2
are connected to the auxiliary contacts on the motor starter in the electrical installation instructions.
Timer Board Programming Instructions
Press the “Select” button to illuminate the LED indicator adjacent to the function required, then press the
“Adjust” button repeatedly until the required setting is displayed on the Digital Readout. After all the
functions have been set, push the “Select” button to the Locked LED indicator. In the locked position, the
Digital Readout will display the last setting, which is the number of blowdown cycles programmed.
To check a specific function setting, push the “Select” button to illuminate the desired function LED, the
setting is then shown on the Digital Readout.

The ON TIME setting is adjustable from 30 to 250 milliseconds in 5 millisecond increments.

The OFF TIME setting is adjustable from 1 to 180 seconds in 1 second increments.

The NUMBER OF VALVES CONNECTED setting is adjustable from 1 through the total number of
outputs available on the Timer Board.

The NUMBER OF BLOWDOWN CYCLES setting is adjustable from 0 to 25 cycles.
Programming Steps
1. – ON TIME – Press the “Select” button until the “ON TIME” LED indicator is illuminated, then press
the “Adjust” button until the required ON TIME in milliseconds is shown on the Digital Readout. 150
milliseconds ON TIME has been determined as the optimum duration for many applications.
Section
5