The Dwyer Timer Board is where the timing can be adjusted for each solenoid. You can adjust the amount of time between pulses (Time Off in se c onds) and how long each pulse will last (Time on in milliseconds). For example, if the time off is s e t for 60 and the time on is set for 150, then the system would perform in the following manner: Power is applied to the timer board via the “Filters” toggle switch on the door of the control panel. (only active if the fan is in operation). The first output of the timer board will send out a 150 millisecond 120vac signal to the first solenoid enclosure. The solenoid will open for 150 milliseconds allowing a small amount of air to pass through which allows air to bleed off f r om the pilot port on the first pulse valve. The first pulse valve opens for 150 milliseconds allowing a high volume of compressed air to fire down into the cartridge filter. A ft er 150 milliseconds has elapsed, the first output of the timer board will t urn off , clos ing the solenoid valve, which blocks off the air bleeding out of the pulse v alve, then closes the pulse valve to prevent air from firing into the cartridge filter. The timer board then waits 60 seconds and then the next output of the board will repeat the steps listed above. The process repeats until the last output is reached, and then starts back at the beginning.
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