5.4
Bleed (A or B) Menu
The Bleed Menu provides the following settings: Set Point, Dead Band, Control Direction, HOA. The
Bleed menu will be indicated on the display by one of the following: (The 'A' indicates that the output
is being controlled automatically.)
Bleed A
OFF
Indicates that the bleed output is currently OFF.
Bleed A
10:00
Indicates the length of time that the Bleed output has been ON.
Bleed A
NO FLOW
Indicates that bleed control has been suspended because there is presently no flow past the flow
switch.
Bleed A
LOCKOUT
Indicates that the output is currently locked out due to a biocide add or biocide lockout.
Bleed A
TIMEOUT
Indicates that the feed lockout timer in the Bleed and Feed mode has expired.
Set Point
This is the conductivity value at which the bleed solenoid valve is turned ON. The factory default setting for the
WDT controller is for the Bleed output to turn on when the conductivity is higher than the set point. This may be
changed at the Control Direction screen.
Dead Band
This is the conductivity value that when combined with the set point determines when the bleed output turns OFF.
Assuming that the control direction is set for normal operation (High Set Point) the bleed output will turn off when
the conductivity drops below the set point minus the Dead Band. For example: The set point is 1500 µS/cm and the
Dead Band is 200 µS/cm. The bleed output turns ON when the conductivity reading is greater than 1500 but does
not turn OFF until the conductivity drops below 1300.
Time Limit
This menu allows you to set a maximum amount of time for the bleed. The limit time is programmed in hours and
minutes and can be set between 1 minute and 8 hrs: 20 minutes. If the time limit is set to zero, then the valve may
be open indefinitely. If the maximum time is exceeded, the bleed valve will close and will not re-open until the
"Reset Timer" menu is reset by an operator.
Reset Timer
Only appears if the time limit above has been exceeded. Use the up or down arrow to change "N" to "Y", then
press ENTER.
Control Dir
H / L
This allows you to set the Normal (High Set Point) or Inverse (Low Set Point) operation of the bleed output. When
set to High, the output turns on when the conductivity is higher than the set point. When set to Low, the output
turns on when the conductivity is lower than the set point.
High Set Point
Low Set point
H O A
The "Hand Off Auto" screen allows you to select the operating mode of the bleed output. In Hand (manual) mode,
the output is turned on immediately for a maximum of 10 minutes. If you walk away the output will return to Auto
mode at the end of that time. In Off mode the output will stay Off indefinitely. In Auto mode the bleed output will
respond to changes in conductivity based on the set point. The HOA mode of the bleed output is indicated on the
bleed status lines.
Figure 10 Bleed (A or B) Menu
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