Hydrotech 5600 SXT Downflow Service Manual - Manual (Page 8)

Page 8
Timer Operation
Meter Immediate Control
A meter immediate control measures water usage and regenerates the system as soon as the calculated system
capacity is depleted. The control calculates the system capacity by dividing the unit capacity (typically expressed
in grains/unit volume) by the feedwater hardness and subtracting the reserve. Meter Immediate systems generally
do not use a reserve volume. However, in twin tank systems with soft-water regeneration, the reserve capacity
should be set to the volume of water used during regeneration to prevent hard water break-through. A Meter
Immediate control will also start a regeneration cycle at the programmed regeneration time if a number of days
equal to the regeneration day override pass before water usage depletes the calculated system capacity.
Meter Delayed Control
A Meter Delayed Control measures water usage and regenerates the system at the programmed regeneration
time after the calculated system capacity is depleted. As with Meter Immediate systems, the control calculates the
system capacity by dividing the unit capacity by the feedwater hardness and subtracting the reserve. The reserve
should be set to insure that the system delivers treated water between the time the system capacity is depleted
and the actual regeneration time. A Meter Delayed control will also start a regeneration cycle at the programmed
regeneration time if a number of days equal to the regeneration day override pass before water usage depletes
the calculated system capacity.
Time Clock Delayed Control
A Time Clock Delayed Control regenerates the system on a timed interval. The control will initiate a regeneration
cycle at the programmed regeneration time when the number of days since the last regeneration equals the
regeneration day override value.
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 initiates a regeneration cycle on 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 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.
Manually Initiating a Regeneration
When timer is in service, press the Extra Cycle button for 5 seconds on the main screen.
The timer advances to Regeneration Cycle Step #1 (backwash), and begins programmed time count down.
Press the Extra Cycle button once to advance valve to Regeneration Cycle Step #2 (brine draw & slow rinse).
Press the Extra Cycle button once to advance valve to Regeneration Cycle Step #3 (rapid rinse).
Press the Extra Cycle button once to advance valve to Regeneration Cycle Step #4 (brine refill).
Press the Extra Cycle button once more to advance the valve back to in service..
NOTE: If the unit is a filter or upflow, the cycle step order may change..
NOTE: A queued regeneration can be initiated by pressing the Extra Cycle button. To clear a queued regener-
ation, press the Extra Cycle button again to cancel. If regeneration occurs for any reason prior to the delayed
regeneration time, the manual regeneration request shall be cleared.
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