MIOX RIO-S Series Operators Manual
102-00130-D
Page
46
Normal Operation
In normal operation, the RIO-S automatically enters ‘Run’ and ‘Standby’ modes based on
the oxidant level in the oxidant tank. For self-cleaning models, The RIO-S will also
automatically enter a ‘Cleaning’ mode on the first startup after a predefined number of
operating cell hours. In addition to automatically controlling oxidant generation itself, the
RIO-S also has a manual operation mode in which the user starts and stops the OSG from
the HMI.
The mixed oxidant solution generated by the OSG should be used as quickly as
possible to take advantage of the improved disinfection efficacy. If the mixed
oxidant solution is stored for more than 30 minutes before use, store it in a
vented and covered container made of HDPE. Properly stored mixed oxidant
solution will retain its disinfection efficacy for up to 5 days.
Start-Up Sequence / Operating Window
The RIO-S OSG goes through a start-up sequence that includes brine pump(s) activation
and purging the cells with water. When power is applied to the cells, the current flowing
through the cells is measured. During normal operation, the amperage will fluctuate slightly.
Approximate amperage for each RIO-S cell bank is 75-80 amps. If the cell amperage is too
high, the brine flow rate is reduced by slowing the pump; conversely, too low an amperage
is corrected by speeding up the pump. The cell amperage will increase until it stabilizes in
the optimal operating range, the
operating window
. Cell voltage and current are indicated
on the
Main Display
screen. The brine pump(s) will also step up or down, but the pump
control voltage, indicated as
Brine Pump Voltage,
should be between 0 and 5 VDC.
Once the operating window is reached per bank, the electrolytic cells are producing full
strength oxidants which will fill the oxidant tank. When the oxidant storage tank is filled to
the high level, the tank level sensor places the OSG into standby mode after completing a
normal shutdown.
When the OSG goes into shutdown mode, the controller goes through a water flush
sequence to remove brine from the lines and cell. Brine in the cell can cause an adverse
battery effect that can shorten the life of the cell. During the shutdown sequence, the brine
pump will turn off. After approximately 90 seconds or cell amperage decreases below a
suitable level, applied cell voltage is turned off. Residual voltage decreases while the water
flow control valve remains on. Once cell voltage is below a safe threshold, the water flow is
turned off.
When the oxidant storage tank is drained of oxidant solution below the bottom level sensor,
the OSG will automatically restart and run. During a startup sequence, the flow control
valve opens to allow water flow for 60 seconds. Cell power is applied, the brine pump turns
on, and the OSG should come into the operating window within five minutes.
Safety
