10
area and solenoid. It is usually easier to just unscrew the top of the valve cover and drain the diaphragm area that way.
Manually cleaning the Filter Screen
element before storage is also a good idea. That will prevent debris from drying on the screen and
becoming difficult to remove the following season.
This section relates to the following models only:
HN-G-01-2-XXX HN-G-02-2-XXX
5.4 Backwashing without a Filtron 1-10 Controller
For filters that are ordered without a Filtron 1-10 controller, programming of the backwash is based on time off of the irrigation controller.
The irrigation controller must be able to program station run times in seconds (or a 24 VAC one shot relay capable of delivering a 7 second
signal to the filter must be added).
The backwash time (station run time) should be programmed for 7 seconds. If adequate flow and pressure is not available to backwash
the filter and run irrigation, the filter must be scheduled to run alone (without irrigation) to ensure all flow and pressure can be utilized for
backwash.
Since there is no differential pressure switch on this model, an adequate amount of backwash cycles will have to be programmed to ensure
pressure in the system is maintained. It is recommended that the filter is flushed before the irrigation cycle, at least once during the irrigation
cycle (may take more), and then after the irrigation cycle.
