Control Operation - Pentair FLECK 5810 SXT UPFLOW/DOWNFLOW Service Manual

CONTROL 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 feed water hardness and subtracting the
reserve. Meter Immediate systems generally do not use a
reserve volume. The 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. The system
regenerates 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 feed water hardness and
subtracting the reserve. The reserve should be set to ensure
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 initiate a regeneration
cycle on days that have been set to "on" at the specified
regeneration time.
Control Operation During Regeneration
During regeneration, 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.
6 • FLECK 5810 & 5812 SXT Upflow/Downflow
Manually Initiating a Regeneration
1. When the system is in service, press the Extra Cycle button
for five seconds on the main screen.
2. The control advances to Regeneration Cycle Step #1
(backwash), and begins programmed time count down.
3. Press the Extra Cycle button once to advance valve to
Regeneration Cycle Step #2 (brine draw and slow rinse).
4. Press the Extra Cycle button once to advance valve to
Regeneration Cycle Step #3 (rapid rinse).
5. Press the Extra Cycle button once to advance valve to
Regeneration Cycle Step #4 (brine refill).
6. 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
regeneration, press the Extra Cycle button again
to cancel. If regeneration occurs for any reason
prior to the delayed regeneration time, the manual
regeneration request will be cleared.
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. The display and motor shut
down, but it continues to keep track of the time and day for a
minimum of 8 hours.
The system configuration settings are stored in a non-volatile
memory and are stored indefinitely with or without 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.
If power fails during a regeneration cycle, the valve
CAUTION
will remain in it's 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
power. If the valve misses a scheduled regeneration due to
a power failure, it will queue a 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 set up with a sufficient reserve capacity to
compensate for regeneration delays.