Page 18
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Operation and Maintenance Manual Rev: C17
A – 5.11: Filter Backwash (continued)
A – 5.11.1: Triggers (continued)
A – 5.11.1.3: Flow Rate Settings:
Start BW Enable (Op): Enables or
disables triggering a backwash from a low
flow rate.
Set Point (Op): Only shown if the Start BW
Enable is enabled. When the Flow Rate falls
below this value for the BW Start Delay, the
controller will trigger a backwash.
BW Start Delay (Op): Only shown if the Start
BW Enable is enabled. This is the amount of
time the flow rate must remain below the Set
Point before it triggers a backwash.
A – 5.11.1.4: Flow Volume Settings:
Start BW Enable (Op): Enables or
disables triggering a backwash from a flow
volume.
Flow Vol Increment (Op): Only shown if the
Start BW Enable is enabled. Enter the value
the volume must increment by to trigger a
backwash.
A – 5.11.1.5: Turbidity Settings:
Start BW Enable (Op): Enables or disables
triggering a backwash from a high turbidity
set point.
BW Start Set Point (Op): Only shown if Start
BW Enable is enabled. When the turbidity
reading reaches or rises above this value for
the BW Start Delay time, the controller will
trigger a backwash.
BW Start Delay (Op): This value sets how
long the turbidity reading must remain at or
above the Start BW Set Point before
triggering a backwash.
End BW Enable (Op): Enables or disables
ending the backwash of a filter early from a
low turbidity set point.
BW End Set Point (Op): Only shown if End
BW Enable is enabled. When the turbidity
reading reaches or falls below this value for
the BW End Delay time, the controller will
end the current filter's backwash.
BW End Delay (Op): Only shown if End BW
Enable is enabled. This value sets how long
the turbidity reading must remain at or
below the End BW Set Point before ending
the current filter's backwash.
A – 5.11.2: Other features
BFFS Duration: (Op): Prevents a trigger
(except manual start) from starting a backwash
if triggered within this time period from the end
of the previous backwash. Set to zero to
disable.
Inhibit BW Start (Op):
Enable/Disable (Op): Enables or disables
locking out backwashes between the Start
Time and End Time.
Start Time (Op): Only shown if
Enable/Disable is enabled. Prevents a
backwash from being triggered between this
time and the End Time.
End Time (Op): Only shown if
Enable/Disable is enabled. Prevents a
backwash from being triggered between this
time and the Start Time.
Hi BW Pit Options (Op): Only shown if the
BW Pit Input has been enabled.
Hi BW Pit Action (Op): Choose what
action you want the controller to take when
a backwash pit high alarm occurs while
backwashing. While the pit/tank drains, you
may either switch the filter back to filter (the
default setting), shut down the Recirculation
Pump (if the Recirculation Pump has been
assigned a relay), or isolate the filter from the
system (if the valve type is set to Enhanced
Pilot Valve) which prevents re-compacting
the filter media.
Hi BW Timeout (Op): This value sets the
maximum time you wish the controller to
hold a backwash while waiting for the
backwash pit to drain. If the timeout is
reached, the backwash will be canceled and
the BW Duration Failsafe alarm will trigger.
A – 5.12: Sensor Wash
If your controller is set up to do a Sensor Wash
you will have the following options:
4 Event 28 Day Timer (Op): Once you have
entered Sensor Wash, select 4Event 28Day Timer
from the menu. The 4 Event 28 Day Timer allows
you to program the sensor wash on a schedule. See
the section on Super Chlorination's 4 Event 28
Day Timer for details on how to set this.
Start/End Time (Op): Allows you to set
what times the feed may be triggered during a
day.
# Of Cycles (Op): Only shown if Duration is not
zero. Sets how many times the relay will trigger
between the Start and End times.
Duration (Op): Sets how long the feed will run
for each cycle. If set to zero, there are no cycles
and the relay will simply be on when current time
is between the active event's start and end times.
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