36
37
Input
Select the sensor to be used by this relay.
Direction
Select the control direction.
5.3.3
Relay, Flow Timer Control Mode
Output Details
The details for this type of output include the relay on/off state, HOA mode or Interlock status, accumulated on-time,
alarms, current cycle on time and relay type.
Settings
Press the Settings key view or change the settings related to the relay.
Feed Duration
Enter the amount of time for the relay to activate for once the accumulated volume
through the water meter has been reached.
Accumulated Volume
Enter the volume of water to pass through the water meter required to trigger the chemical feed.
Flow Input
Select the input to be used to control this output.
Reset Timer
Use this menu to cancel the current feed cycle.
5.3.4
Relay, Bleed and Feed Control Mode
ONLY AVAILABLE IF HVAC MODES ARE ENABLED IN CONFIG MENU – GLOBAL SETTINGS
Output Details
The details for this type of output include the relay on/off state, HOA mode or Interlock status, accumulated on-time,
alarms, current cycle on time and relay type.
Settings
Press the Settings key view or change the settings related to the relay.
Feed Time Limit
Enter the maximum amount of feed time per bleed event
Bleed
Select the relay to be used for Bleed/Blowdown
5.3.5
Relay, Bleed then Feed Control Mode
ONLY AVAILABLE IF HVAC MODES ARE ENABLED IN CONFIG MENU – GLOBAL SETTINGS
Output Details
The details for this type of output include the relay on/off state, HOA mode or Interlock status, accumulated on-time,
alarms, current cycle on time and relay type.
Settings
Press the Settings key view or change the settings related to the relay.
Feed Percentage
Enter the % of bleed relay activation time to use for the feed relay activation time
Feed Time Limit
Enter the maximum amount of feed time per bleed event
Reset Timer
Use this menu to cancel the current feed cycle.
Bleed
Select the relay to be used for Bleed/Blowdown
5.3.6
Relay, Percent Timer Control Mode
Output Details
The details for this type of output include the relay on/off state, HOA mode or Interlock status, cycle time, accumulated
on-time, alarms, current cycle on time and relay type.
Settings
Press the Settings key view or change the settings related to the relay.
Sample Period
Enter the duration of the sample period.
Feed Percentage
Enter the % of the sample period time to use for the feed relay activation time
5.3.7
Relay, Biocide Timer Control Mode
ONLY AVAILABLE IF HVAC MODES ARE ENABLED IN CONFIG MENU – GLOBAL SETTINGS
Basic Biocide Operation
When a biocide event triggers, the algorithm will first prebleed (if a prebleed is programmed) for the set amount of
prebleed time or down to the set prebleed conductivity. Then the biocide relay is turned on for the set duration. This
is followed by a post-bio add lockout that blocks the bleed relay from turning on for a set amount of bleed lockout
time.
Special Condition Handling
Prebleed
If both a time limit and a conductivity limit are set, the time limit takes precedence. The bleed relay will turn off
once the time limit is reached or when the prebleed conductivity limit is reached (whichever occurs first). If the
prebleed has a conductivity limit set, then the time limit can’t be set to zero, as this would allow the prebleed to
last forever if the conductivity limit is never reached.
Overlapping biocide events
If a second biocide event occurs while the first one is still active (in pre-bleed, biocide add or lockout), the
second event will be ignored. An Event Skipped alarm will be set.
Interlock Conditions
Interlocks override the relay control, but do not change the operation of the timer control.
A no-flow (or other interlock) condition does not delay a biocide add. The biocide add duration timer will
continue even if the relay is locked out due to a no-flow or other interlock condition. This will prevent delayed
biocide adds which can potentially cause higher than expected biocide concentrations in the system when two
biocides adds occur close to the same time. Not allowing delayed biocide adds will also prevent incompatible
biocides getting added at close to the same time.
“Activate With” Conditions
“Activate with channels” settings override the relay control, but do not change the operation of the timers or
related bleed control. The biocide timer continues counting biocide add time when the biocide relay is forced
on, and ends at the expected time (biocide event start time plus duration). If the “activate with” condition con-
tinues after the end of the biocide feed time, the relay remains activated.
Alarms
An Event Skipped alarm is set when a second biocide event occurs while one event is still running (either in
prebleed, biocide add or post-biocide add lockout). An Event Skipped alarm is also set when the biocide add
relay never turns on during a biocide add because of an interlock condition.
The alarm is cleared when the relay is next activated for any reason (the next timer event or HAND mode or
“activate with” force on condition).
Output Details
The details for this type of output include the relay on/off state, HOA mode or Interlock status, accumulated on-time,
alarms, current cycle on time and relay type. The current week number and day of the week is displayed (even if
there is no multi-week repetition event programmed). Cycle Time shows the time counting down of the currently
active part of the biocide cycle (pre-bleed, biocide feed, or post biocide feed lockout of the bleed).
Settings
Press the Settings key view or change the settings related to the relay.
Event 1 (through 10)
Enter these menus to program timer events via the menus below:
Repetition
Select the time cycle to repeat the event: Daily, 1 Week, 2 Week, 4 Week, or None. An
event means that the output is turned on at the same time of day, for the same amount
of time, and except for the Daily cycle, on the same day of the week.
Week
Only appears if Repetition is longer than 1 Week. Select the week during which the
event will occur.
Day
Only appears if Repetition is longer than Daily. Select the day of the week during
which the event will occur.
