Confirming disinfection
If, within the time span (Time OFF - Time ON), the actual disinfection time reaches tDIS is greater than
the set tMIN, the disinfection is concluded with a positive outcome. It automatically exits this status
and returns to the adjustment (modulating) mode.
If the sufficient time tDIS is not reached, the disinfection phase ends at Time OFF.
Flushing
LEGIOMIX automatically enters this mode at the end of the disinfection phase, and is used to make
the water temperature return to the adjustment value (SET1 value) quicker, or to periodically clear (or
flush) the storage of impurities. This phase is ended after a time selected with the tFLUX parameter.
When flushing time has ended, relay 1, relay 4, and the controller returns to the “adjustment” mode.
Thermal shock
LEGIOMIX adjusts the mixed outlet water temperature at the set shock value (SETSH) for a selected
time duration (tSH). The Shock button on the front of the controller can be used then to initiate
thermal disinfection, the manual mode. This function is associated with activation of alarm 4 (AL4),
and illumination of the alarm LED. Thermal shock can be started by pressing the specific button on
the front panel (press and hold for at least 5 seconds) while the operating screen is displayed, or to
program it with the menu item for a delayed execution (countdown in minutes), or by remote control.
Thermal shock operation can be stopped, if needed, by pressing the shock button and
confirming with the “OK” button, or by remote control.
This is a potentially dangerous function so a jumper is provided on the printed circuit board to enable
it. If the jumper is closed, the Shock function can be used; if it is open, it is not available (see Back
Panel section).
At the end of the Thermal shock phase, the controller reverts to the “adjustment” (modulating) mode.
Low power
LEGIOMIX goes into low power mode with loss of power, and continues to run the internal date
clock. NOTE: in this condition there is no power for switching relays, so the controller does not
perform the adjustment or disinfection functions, sensor temperatures can not be acquired, and no
communication functionality is available. The mixing valve remains in the last state when power went
out. LCD and LED displays are off, all LEDs are off, except the “alarm” LED, which will be flashing.
When the power comes back on, the blackout is recorded in the log (alarm AL5) and the controller
returns to operating mode as programmed, unless the power failure lasts long enough to completely
run down the battery. In this case, LEGIOMIX will be reset to default values when the power is
restored.
In the event of a reset or extended power failure, factory settings are restored. If modifying the factory
settings, make a copy of the new settings.
ANTI-CLOG function
The LEGIOMIX controller is configured to execute a daily ball rotation cycle, to ensure efficient ball
operation and cleaning. This occurs after the disinfection program concludes, if active, or in any
case after 24 hours has elapsed when disinfection is not active. The ANTI-CLOG function can be
deactivated through the ANTI-CLOG step in the “SETTINGS” menu by entering the release code
5566 and confirming with ON-OFF. Eliminating this function increases the risk of deposits forming on
the moving parts of the valve.
If it is necessary to also eliminate the disinfection function, proceed in the following order: 1. eliminate
the ANTI-CLOG function, then 2. eliminate the disinfection function.
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