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Installer Manual Fleck 3900 - NXT - Operation
8.2.
Recommendations
•
Use only regeneration salts designed for water softening in accordance with EN973;
•
for optimal system operation, the use of clean salt, free from impurities, is recommended (for
example salt pellets);
•
do not use ice melt, block, or rock salts;
•
the sanitizing process (both with liquid and electrochlorination) may introduce chlorine
compounds which may reduce the lifetime of the ion exchange resins. Refer to the technical
guides for resins in common use, providing necessary checks on the system.
8.3.
Manual regeneration
Mandatory
The controller must be in service in order to enable this procedure.
8.3.1. Manual delayed regeneration
A
Press
once for delayed regeneration.
→ The regeneration starts on the programmed regeneration time. See chapter
6.5.17. Regeneration start time, page 70;
→ The blue LED flashes and the letters RGQ take place on the valve state.
Note
To cancel: press
valve status.
8.3.2. Immediate regeneration
A
Press and hold
which mode of regeneration is programmed.
8.4.
To advance regeneration cycles
A
Press
to pass to the next regeneration cycle.
8.5.
Operation during a power failure
•
All the program settings are stored in a permanent memory;
•
current valve position, cycle step time elapsed, and time of day are stored during a power failure,
and will be restored upon power restoration;
•
time is kept during a power failure and the time of day is adjusted upon restoration of the power
(as long as the power is restored within 12 hours);
•
the time of day on the main display screen will flash after a power failure once the power is
restored until any button is pressed on the keyboard.
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again. The blue LED stop flashing and the letters SRV take place on the
for 5 seconds to initiate immediate manual regeneration, independent of
Ref. MKT-IM-015 / B - 08.06.2018
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