Day of the Week Control
This control regenerates the system on a weekly schedule. The schedule is defined in Master
Programming by setting each day to either “off” or “on.” The control will initiate the regeneration
cycle on the days that have been set to “on” at the specified regeneration time.
Control Operation during Regeneration
During regeneration, the control displays a special regeneration display. In this display, the
control shows the current regeneration step number the valve is advancing to, or has reached,
and the time remaining in that step. The step number that displays flashes until the valve
completes driving to this regeneration step position. Once all regeneration steps are complete
the valve returns to service and resumes normal operation.
Pressing the Extra Cycle button during a regeneration cycle immediately advances the valve to
the next cycle step position and resumes normal step timing.
Control Operation during Programming
The SXT control only enters the Program Mode with the valve in service. While in the Program
Mode, the control continues to operate normally monitoring water usage and keeping all
displays up to date. Control programming is stored in memory permanently, eliminating the
need for battery backup power.
Control Operation during a Power Failure
The SXT includes integral power backup. In the event of power failure, the control shifts into a
power-saving mode. The control stops monitoring water usage, and the display and motor shut
down, but it continues to keep track of the time and day for a minimum of 48 hours.
The system configuration settings are stored in a non-volatile memory and are stored
indefinitely with or without line power. The Time of Day flashes when there has been a power
failure. Press any button to stop the Time of Day from flashing.
If power fails while the unit is in regeneration, the control will save the current valve position
before it shuts down. When power is restored, the control will resume the regeneration cycle
from the point where power failed. Note that if power fails during a regeneration cycle, the
valve will remain in its current position until power is restored. The valve system should include
all required safety components to prevent overflows resulting from a power failure during
regeneration.
The control will not start a new regeneration cycle without line power. If the valve misses a
scheduled regeneration due to a power failure, it will queue regeneration. Once power is
restored, the control will initiate a regeneration cycle the next time that the Time of Day equals
the programmed regeneration time. Typically, this means that the valve will regenerate one day
after it was originally scheduled. If the treated water output is important and power interruptions
are expected, the system should be setup with a sufficient reserve capacity to compensate for
regeneration delays.
5
Summary of Contents for PROFESSIONAL II Series
Page 15: ...NOTES...
