The “FILTRON 20-30” is a modular back flushing controller for automatic filters of 20 or 30 stations.
There exist DC and AC models.
The DC model can be powered either by 6v DC or 12v DC and it activates 2 wired 12v DC latching solenoids. The voltage for the solenoids switching is boosted by a charge pump.
The AC model contains an internal transformer that can be powered by 110v or 220v from which it generates the 24v AC for the solenoids.
Flushing cycles may be triggered either by time or by the embedded electronic DP sensor reaching the set point or by a dry contact signal from an external DP sensor.
Endless looping problems can be eliminated by detecting repeated consecutive cycles passing beyond a predefined limit.
The unit can optionally handle a Pressure-Sustaining / Main valve, and an Alarm output.
The unit is equipped with a customized LCD display and key board.
The unit counts separately the number of flushing cycles triggered by DP, by time and manually.
