Lync WQ-RS
SECTION 3: OPERATION
L- OMM-005_A
•
2/23/2022
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APPENDIX A. CONTROLLER PROGRAMMING: PARAMETERS EXPLAINED
Parameter
Value
Range
Example
Input Switch Beha
VIORS
Tank Level Switch de-Bounce
Seconds
2.0
This specifies the time that the tank switch must be closed or open before the controller accepts it
as a valid condition. This helps to prevent nuisance tripping of the RO especially in small or
turbulent tanks
Pretreat Switch de-Bounce
Seconds
2
This is the time that the pretreat switch must be OPEN before the controller accepts it as a valid
condition. The function is to prevent nuisance tripping of the RO especially in small or turbulent
tanks
Pump/Inlet Solenoid Beha
VIORS
Pump start delay
Seconds
10
On RO start-up, after the tank switch opens, the inlet solenoid valve is energized. When the inlet pressure switch closes this
begins the “Pump start delay”. If the pressure switch remains closed, the pump will start after 10 seconds.
Inlet Solenoid stop delay
Seconds
1
This value sets the delay for the inlet solenoid valve to be de-energized following the de-energizing of the motor on Tank Full RO
shut down. This prevents the pump from operating against a closed suction as the pump spins down. Time values greater than 1
or 2 seconds may require an inlet valve that will operate with 0psi differential pressure.
Low Inlet Pressure Beha
VIORS
Pump start retry interval (restart delay after LP fault)
Seconds
60
When the inlet pressure switch opens, the controller de-energizes the motor and the inlet solenoid valve remains open. The
controller will continue to monitor the inlet pressure switch. After the switch is closed for
the duration of the “Pump start retry
interval” the motor is re-energized.
Low pressure fault shutdown, # of faults
Faults
5
Low pressure fault shutdown, time period to count faults
Minutes
10
Low pressure fault shutdown, reset after shutdown
(0 value = no restart)
Minutes
60
These three values work together to determine how the RO handles Low Pressure conditions. The first two values, “# of faults”
and “time period to count faults”, sets the limit for the number of low fault conditions over time that are required to place the RO
in “Low Pressure Fault Shutdown”. The third value sets the duration of the “Low Pressure Fault Shutdown” which is the period
that the RO will remain idle before trying to restart. The purpose of the Low Pressure Fault Shutdown is to prevent an RO from
turning OFF/ON repeatedly without any limit.
Low pressure timeout fault
Seconds
60
If the inlet valve is open, but the pressure isn’t sufficient to close the inlet pressure switch, the RO would run indefinitely on line
pressure. This value sets the time limit for the RO to operate with the inlet valve open with Low Pressure as indicated by an Open
inlet pressure switch before a Low Pressure Fault is added to the counter above.
Flush Beha
VIOR
Time from last flush before Flush on Shutdown
Minutes
15
Minimum operation before Flush on Shutdown
Minutes
60
Flush duration on Shutdown
Seconds
60
Periodic Flush interval
Minutes
60
Periodic Flush duration
Seconds
30
Unit Idle Flush interval
Minutes
0
The Unit Idle Flush Interval sets a time after which the RO will start-up and run in the flush mode. This is disabled by default
because of the danger of over-flowing a tank if not properly implemented. It is intended for environments where leaving the RO
idle for long periods would invite bio-fouling. (0)=disabled
Unit Idle Flush duration
Seconds
0
Sets the duration of the Idle Flush. (0)=disabled
Timed Manual Run - Duration of Manual Run
Minutes
5
Timed Manual Flush - Duration of Manual Flush
Minutes
5
Conductivity Probe Sample Rate
Seconds
2
Conductivity Shutdown (0)=disabled
Minutes
0